<PAGE>
   AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON SEPTEMBER 8, 2000
                                                      REGISTRATION NO. 333-
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------

                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                                  ------------

                                    FORM S-1

                             REGISTRATION STATEMENT
                                     UNDER
                           THE SECURITIES ACT OF 1933

                                  ------------

                        HYDROGEN BURNER TECHNOLOGY, INC.

             (Exact name of registrant as specified in its charter)

<TABLE>
<S>                          <C>                          <C>
        CALIFORNIA                      3629                      33-0556632
      (State or other             (Primary Standard            (I.R.S. Employer
       jurisdiction                  Industrial               Identification No.)
     of incorporation)       Classification Code Number)
</TABLE>

                               19300 SUSANA ROAD
                       RANCHO DOMINGUEZ, CALIFORNIA 90221
                                 (310) 900-0400
  (Address, including zip code, and telephone number, including area code, of
                   registrant's principal executive offices)

                                  ------------

                                 DAVID M. MOARD
                            CHIEF EXECUTIVE OFFICER
                        HYDROGEN BURNER TECHNOLOGY, INC.
                               19300 SUSANA ROAD
                       RANCHO DOMINGUEZ, CALIFORNIA 90221
                                 (310) 900-0400

 (Name, address, including zip code, and telephone number, including area code,
                             of agent for service)

                                  ------------

                                   COPIES TO:

<TABLE>
<S>                                               <C>
          NANCY H. WOJTAS, ESQ.                          WILLIAM P. ROGERS, JR., ESQ.
      MANATT, PHELPS & PHILLIPS, LLP                       CRAVATH, SWAINE & MOORE
          11355 W. OLYMPIC BLVD                               825 EIGHTH AVENUE
      LOS ANGELES, CALIFORNIA 90064                        NEW YORK, NEW YORK 10019
        TELEPHONE: (310) 312-4307                         TELEPHONE: (212) 474-1270
        FACSIMILE: (310) 312-4224                         FACSIMILE: (212) 474-3700
</TABLE>

                                  ------------

        APPROXIMATE DATE OF COMMENCEMENT OF PROPOSED SALE TO THE PUBLIC:
  AS SOON AS PRACTICABLE AFTER THIS REGISTRATION STATEMENT BECOMES EFFECTIVE.

    If any of the securities being registered on this Form are to be offered on
a delayed or continuous basis pursuant to Rule 415 under the Securities Act of
1933, check the following box. / /

    If this Form is filed to register additional securities for an offering
pursuant to Rule 462(b) under the Securities Act of 1933, check the following
box and list the Securities Act registration statement number of the earlier
effective registration statement for the same offering. / /

    If this Form is a post-effective amendment filed pursuant to Rule 462(c)
under the Securities Act of 1933, check the following box and list the
Securities Act registration statement number of the earlier effective
registration statement for the same offering. / /

    If this Form is a post-effective amendment filed pursuant to Rule 462(d)
under the Securities Act of 1933, check the following box and list the
Securities Act registration statement number of the earlier effective
registration statement for the same offering. / /

    If delivery of this prospectus is expected to be made pursuant to Rule 434,
check the following box. / /

                                  ------------

                        CALCULATION OF REGISTRATION FEE

<TABLE>
<CAPTION>
                    TITLE OF EACH CLASS                        PROPOSED MAXIMUM
                    OF SECURITIES TO BE                       AGGREGATE OFFERING        AMOUNT OF
                         REGISTERED                                PRICE(1)         REGISTRATION FEE
<S>                                                           <C>                  <C>
Common Stock, no par value..................................     $115,000,000          $30,360.00
</TABLE>

(1) Estimated solely for the purpose of computing the amount of the registration
    fee pursuant to Rule 457(a).

                                  ------------

    THE REGISTRANT HEREBY AMENDS THIS REGISTRATION STATEMENT ON SUCH DATES AS
MAY BE NECESSARY TO DELAY ITS EFFECTIVE DATE UNTIL THE REGISTRANT FILES A
FURTHER AMENDMENT WHICH SPECIFICALLY STATES THAT THIS REGISTRATION STATEMENT
WILL THEREAFTER BECOME EFFECTIVE IN ACCORDANCE WITH SECTION 8(a) OF THE
SECURITIES ACT OF 1933 OR UNTIL THIS REGISTRATION STATEMENT BECOMES EFFECTIVE ON
SUCH DATE AS THE SECURITIES AND EXCHANGE COMMISSION, ACTING PURSUANT TO
SECTION 8(a), MAY DETERMINE.

--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
<PAGE>
                 SUBJECT TO COMPLETION, DATED SEPTEMBER 8, 2000
The information in this prospectus is not complete and may be changed. We may
not sell these securities until the registration statement filed with the
Securities and Exchange Commission is effective. This prospective is not an
offer to sell these securities and it is not soliciting an offer to buy these
securities in any state where the offer or sale is not permitted.
<PAGE>
PROSPECTUS

                                     SHARES

                                   [HBT LOGO]

                        HYDROGEN BURNER TECHNOLOGY, INC.

                                  COMMON STOCK

                                $     PER SHARE

                                   ---------

    We are selling       shares of our common stock. The underwriters named in
this prospectus may purchase up to       additional shares of common stock from
us to cover over-allotments.

    This is an initial public offering of our common stock. We currently expect
the initial public offering price to be between $      and $      per share. We
intend to apply to have our common stock included for quotation on the Nasdaq
National Market under the symbol "HBTI."

                                 --------------

    INVESTING IN OUR COMMON STOCK INVOLVES RISKS. SEE "RISK FACTORS" BEGINNING
ON PAGE 8.

    Neither the Securities and Exchange Commission nor any state securities
commission has approved or disapproved these securities or determined if this
prospectus is truthful or complete. Any representation to the contrary is a
criminal offense.

                                 --------------

<TABLE>
<CAPTION>
                                                               PER SHARE        TOTAL
                                                              ------------   ------------
<S>                                                           <C>            <C>
Public Offering Price.......................................  $              $

Underwriting Discount.......................................  $              $

Proceeds to Hydrogen Burner Technology (before expenses)....  $              $
</TABLE>

    The underwriters are offering the shares subject to various conditions. The
underwriters expect to deliver the shares to purchasers on or about           ,
2000.

                                 --------------

SALOMON SMITH BARNEY
                               CIBC WORLD MARKETS
                                                                 LEHMAN BROTHERS

           , 2000
<PAGE>
    YOU SHOULD RELY ONLY ON THE INFORMATION CONTAINED IN THIS PROSPECTUS. WE
HAVE NOT AUTHORIZED ANYONE TO PROVIDE YOU WITH DIFFERENT INFORMATION. WE ARE NOT
MAKING AN OFFER OF THESE SECURITIES IN ANY STATE WHERE THE OFFER IS NOT
PERMITTED. REGARDLESS OF THE TIME OF DELIVERY OF THIS PROSPECTUS OR ANY SALE OF
THE COMMON STOCK, YOU SHOULD NOT ASSUME THAT THE INFORMATION PROVIDED BY THIS
PROSPECTUS IS ACCURATE AS OF ANY DATE OTHER THAN THE DATE OF THIS PROSPECTUS.

                               TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                                PAGE
                                                              --------
<S>                                                           <C>
Prospectus Summary..........................................      1
Risk Factors................................................      8
Special Note Regarding Forward-Looking Statements...........     17
Use of Proceeds.............................................     18
Dividend Policy.............................................     18
Capitalization..............................................     19
Dilution....................................................     20
Selected Consolidated Financial Data........................     21
Management's Discussion and Analysis of Financial Condition
  and Results of Operations.................................     22
Business....................................................     27
Management..................................................     41
Certain Relationships and Related Transactions..............     50
Principal Shareholders......................................     53
Description of Capital Stock................................     56
Repurchase Offer............................................     59
Shares Eligible for Future Sale.............................     60
Underwriting................................................     62
Legal Matters...............................................     64
Experts.....................................................     64
Available Information.......................................     64
Index to Consolidated Financial Statements..................    F-1
</TABLE>

                                 --------------

    Until             , 2000, all dealers that buy, sell or trade our common
stock, whether or not participating in this offering, may be required to deliver
a prospectus. This is in addition to the dealers' obligation to deliver a
prospectus when acting as underwriters and with respect to their unsold
allotments or subscriptions.

                                 --------------

    Unless the context otherwise requires, in this prospectus, "Hydrogen Burner
Technology," "the company," "we," "us" and "our" each refers to Hydrogen Burner
Technology, Inc. and its subsidiaries.

                                 --------------

    UOB-TM- is our trademark. This prospectus also includes trademarks of other
entities.

                                       i
<PAGE>
                               PROSPECTUS SUMMARY

    THIS SUMMARY HIGHLIGHTS INFORMATION CONTAINED ELSEWHERE IN THIS PROSPECTUS.
BEFORE DECIDING TO INVEST IN OUR COMMON SHARES, YOU SHOULD CAREFULLY READ THIS
ENTIRE PROSPECTUS, INCLUDING THE SECTION ENTITLED "RISK FACTORS."

                           HYDROGEN BURNER TECHNOLOGY

    We are a leading designer and developer of hydrogen fuel processors for fuel
cell systems and industrial hydrogen generators. The efficient and
cost-effective production of hydrogen is critical to the commercial introduction
of fuel cell systems into the mass transportation and stationary markets. Our
goal is to be the leading provider of hydrogen fuel processors by capitalizing
on our patented Under-Oxidized Burner (UOB-TM-) technology for hydrogen
production. When compared to other currently available methods of producing
hydrogen, we believe that our technology is more efficient, lower in emissions
and lower in capital costs. Since 1993, we have completed substantial field
tests of our hydrogen generators with industrial gas companies such as Gaz de
France and Air Liquide Canada, Inc. and have demonstrated our hydrogen processor
for fuel cell systems to leading fuel cell manufacturers such as Ballard Power
Systems Inc., Plug Power Inc., H Power Corp. and EnAble-TM- Fuel Cell
Corporation, a subsidiary of DCH Technology, Inc. Our industrial hydrogen
generators can be used in numerous manufacturing applications. We delivered our
first commercial industrial hydrogen generation systems in 1997 and expect to
deliver our first commercial fuel processors for fuel cell systems by the end of
2000.

    In the stationary fuel cell market, we are designing our initial products
for residential and small commercial market applications. In the transportation
market, we are developing on-board hydrogen processors for fuel cell vehicles
and other transportation market applications. In addition, we are developing
hydrogen generation systems that can be used at hydrogen refueling stations to
fuel municipal bus systems and other fleet vehicles. For example, as a
participant in a California Fuel Cell Project program, we have installed a
large-scale hydrogen generation system at the SunLine Transit Agency to fuel
buses powered by XCELLSIS The Fuel Cell Engine Company, an alliance among
DaimlerChrysler Corp., Ford Motor Company and Ballard Power Systems.

                     MARKET OPPORTUNITIES FOR OUR PRODUCTS

    IMPORTANCE OF HYDROGEN FUEL PROCESSORS TO FUEL CELL SYSTEMS. A fuel cell is
an electrochemical device that produces electricity from hydrogen without
combustion, with water and heat as the only by-products. Fuel cell systems have
several advantages over conventional power generation systems, including lower
emissions, higher fuel efficiency, quieter operation, lower vibration and
potentially lower maintenance and capital costs. These advantages enable fuel
cells to offer cleaner and more efficient alternatives to existing power
sources.

    There are three major components to a fuel cell system: the fuel processor,
the fuel cell stack and the power conditioning equipment. Certain fuel cell
manufacturers and fuel processor companies are finding it difficult to generate
hydrogen efficiently and in a scaled-down fashion suitable for broad commercial
market applications. Moreover, the cost of the fuel processor represents
approximately 40% of the cost of all of the components of an entire fuel cell
system. Accordingly, any significant cost reductions that are achieved by
manufacturers of fuel processors could provide meaningful cost reductions in the
completed fuel cell system. Such overall price reductions should greatly assist
a fuel cell manufacturer's ability to achieve significant market penetration. We
believe our products address these efficiency and cost issues.

    FUEL CELL MARKETS.  Automotive companies, fuel cell developers, component
suppliers and power suppliers are investing large amounts of capital in the
development of fuel cell systems, many of which

                                       1
<PAGE>
incorporate fuel processors. Trends that will influence the penetration of fuel
cells into broad commercial markets include:

    - Increasing demand for electricity, particularly for continuous and
      reliable power, which is partially attributable to the proliferation of
      computers, the Internet, communication networks and advanced electronic
      devices;

    - Deregulation in the energy industry, which is likely to expand the market
      for alternative power technologies;

    - Operational efficiencies and other advantages of fuel cells over
      traditional power technologies; and

    - Environmental concerns regarding conventional power technologies,
      including combustion-based power generation.

    INDUSTRIAL HYDROGEN GENERATION MARKET.  Our hydrogen generators are
completely integrated units that we believe offer an attractive on-site hydrogen
generation alternative to bulk-delivered hydrogen by providing:

    - Cost advantages due to eliminating delivery, transfer and storage
      expenses;

    - Increased safety by reducing the amount of potentially hazardous hydrogen
      stored at an end-user location; and

    - More consistent hydrogen purity with the flexibility to adjust purity to
      the user's desired level.

                          OUR STRATEGIC RELATIONSHIPS

    RELATIONSHIP WITH ENGELHARD CORPORATION.  Effective January 19, 1999, we
entered into an agreement with Engelhard Corporation, the world's largest
catalyst supplier, to develop and commercialize a hydrogen fuel processing
system by combining Engelhard's proprietary catalyst technology with our
proprietary fuel processor technology, specifically for residential and small
stationary fuel cell systems applications. This joint development agreement also
contemplates further development activities between our companies.

    RELATIONSHIP WITH GAZ DE FRANCE.  On July 13, 2000, we entered into a
five-year agreement with one of the leading natural gas suppliers and
distributors in the world, Gaz de France, under which Gaz de France became the
exclusive European distributor of our hydrogen generating systems for industrial
use and refueling stations. This distribution agreement includes annual
take-or-pay requirements based upon projected sales. For 2001, we expect that
Gaz de France will purchase a minimum of eight units of our industrial hydrogen
generation systems. In addition, we plan to develop enhanced hydrogen generation
systems and conduct related research together with Gaz de France. Assuming
exercise of warrants issued under the distribution agreement, a wholly owned
subsidiary of Gaz de France will own approximately   % of our common stock,
after giving effect to the offering.

    RELATIONSHIP WITH VISTEON CORPORATION.  On June 20, 2000, we entered into a
letter of intent for an exclusive engineering, development and manufacturing
alliance with Visteon Corporation with respect to the development and
manufacture of our hydrogen fuel processors for fuel cell systems. Visteon is
the world's second largest supplier of automotive systems, modules and
components to global vehicle manufacturers. Based on our letter of intent, we
intend to enter into the following agreements:

    - ENGINEERING SERVICES AGREEMENT: Visteon will provide engineering, design
      and support services relating to our hydrogen fuel processors, including
      services related to the establishment of our prototype facility.

                                       2
<PAGE>
    - JOINT DEVELOPMENT AGREEMENT: We will jointly design, own and exploit with
      Visteon proprietary technology and know-how related to the manufacture of
      our hydrogen fuel processors.

    - CONTRACT MANUFACTURING AGREEMENT: Visteon will manufacture substantially
      all of our hydrogen fuel processors for fuel cell systems.

    We believe that our relationship with Visteon will significantly accelerate
our efforts to achieve large-scale commercial production of our hydrogen fuel
processors for fuel cell systems as well as enhance our ability to produce the
highest quality and most cost-efficient products.

    In exchange for Visteon's engineering services, we will issue 10,691,350
shares of our common stock to Visteon upon entering into the engineering
services agreement. As a result, and including Visteon's previous purchase of
400,000 shares of our common stock in June of 2000, Visteon will own
approximately    % of our common stock after giving effect to the offering.

                                  OUR STRATEGY

    Our goal is to be the world's leading developer and producer of hydrogen
fuel processors used in fuel cell systems and on-site hydrogen generators used
in industrial applications. To achieve our objectives, we have implemented the
following strategies:

    DESIGN AND DEVELOP SUPERIOR PRODUCTS FOR FUEL CELL MARKETS.  We are
designing and developing proprietary hydrogen processors for proton exchange
membrane, or PEM, fuel cell systems that will be used to power vehicles,
residences, industrial and commercial facilities, devices at remote locations
and certain military applications. In addition, we are also developing a fuel
processor for solid oxide fuel cell fuels, or SOFCs, to be used in stationary
market applications.

    CAPITALIZE ON IMMEDIATE COMMERCIAL MARKETS FOR ON-SITE HYDROGEN GENERATION
SYSTEMS. We believe that our hydrogen generation systems significantly reduce
the cost, logistical, safety and regulatory problems associated with
bulk-delivered hydrogen and have immediate commercial applications in numerous
industrial manufacturing markets. Sales of these systems should help to support
our development efforts of hydrogen processors for fuel cells.

    BUILD ON RELATIONSHIPS WITH FUEL CELL MANUFACTURERS.  We have existing
commercial relationships with Ballard Power Systems, Plug Power, H Power,
EnAble-TM- and other leading fuel cell manufacturers. We intend to be the
provider of choice of hydrogen processors to all of the leading fuel cell system
manufacturers.

    BENEFIT FROM STRATEGIC ALLIANCES AND SEEK NEW PARTNERS.  We believe that our
strategic alliances with Gaz de France and Engelhard, our expected relationship
with Visteon, and other potential alliances will aid us in achieving our goal of
becoming the world's leading producer of hydrogen processors for fuel cell
systems and on-site hydrogen generation systems. We will continue to seek out
additional strategic arrangements in order to enhance research and development,
expand our marketing and distribution channels and ensure high quality
manufacturing and service.

    CONTINUE TO REDUCE COSTS.  We plan to continue to focus on reducing costs of
our fuel processors and hydrogen generators by efficiently combining our
patented technology with existing commercial technologies. We plan to improve
product performance and reduce production costs through the implementation of
new technologies, such as microprocessor controllers, advanced catalysts and
miniaturized components. We also expect significant labor efficiencies as
economies of scale in production are achieved. Moreover, we believe that our
expected relationship with Visteon will allow us to reduce production costs
significantly and achieve rapid commercialization of our products.

    MAINTAIN TECHNOLOGICAL LEADERSHIP.  We are continuing our research and
development of hydrogen processing technology to establish and maintain our
technological leadership in our target

                                       3
<PAGE>
markets, improve our existing products and position us to develop technologies
and products for other market applications.

    ACQUIRE AND LICENSE COMPLEMENTARY TECHNOLOGIES.  We intend to evaluate the
acquisition and licensing of complementary technologies that can potentially
accelerate our development and market penetration of our products.

    CONTINUE TO DEVELOP STRONG RELATIONSHIPS WITH GOVERNMENT AND OTHER
NON-PROFIT ORGANIZATIONS. We have relationships with various state and federal
governmental agencies and are also involved in several hydrogen and
environmentally conscious organizations. We believe that these relationships
will contribute to widespread acceptance of our technology in our target markets
and will lead to additional state and federal contracts involving hydrogen
generation.

                           OUR COMPETITIVE ADVANTAGES

    We believe that the following competitive advantages have established us as
a leader in the design and development of hydrogen fuel processors used in fuel
cell systems as well as on-site hydrogen generators:

    TECHNOLOGY LEADER.  Our customer base has recognized us as a leading
designer of hydrogen fuel processors for fuel cell systems and on-site hydrogen
generation systems. We believe that, in comparison to other currently available
methods of producing hydrogen, our patented UOB-TM- technology for hydrogen
processing provides higher efficiency, lower emissions, decreased capital costs,
and increased safety and reliability, while affording greater fuel flexibility.
In addition, our products utilize a fast and efficient preheating process and
can be scaled to operate in a variety of applications.

    FUEL-FLEXIBLE PRODUCTS.  Our products can utilize a broad range of readily
available fuels, including natural gas, propane, gasoline, diesel and other
hydrocarbons. We believe that we are one of the few companies to offer such a
fuel-flexible solution, thereby allowing our technology to be used in a greater
variety of applications than that of our competitors.

    SUCCESSFUL FIELD TESTING AND PRODUCT DEMONSTRATIONS.  Since 1993, we have
logged over 30,000 hours of operations with our on-site hydrogen generation
systems. In addition, we have demonstrated our hydrogen processor for fuel cell
systems to leading fuel cell manufacturers such as Ballard Power Systems, Plug
Power, H Power and EnAble-TM-.

    KEY ALLIANCE PARTNERS.  We believe that our strategic partnerships will
provide us with significant competitive advantages. Our relationships with Gaz
de France and others provide access to major distribution channels as well as
critical input relating to technological advancements of our products. In
addition, we believe that our anticipated relationship with Visteon will
significantly accelerate our efforts to achieve large-scale commercial
production of our hydrogen fuel processors for fuel cell systems.

    INTELLECTUAL PROPERTY.  We have either obtained or filed patents covering
many of the technological advancements that make our UOB-TM- technology unique.
We currently hold ten U.S. patents and have applied to protect our patents
internationally. We have also filed for six additional patents in the United
States.

                                       4
<PAGE>
    STRONG MANAGEMENT TEAM.  We believe that we have a strong management team
with the vision, experience and skills necessary to enable us to achieve our
objectives. Our co-founder, Chairman, President and Chief Executive Officer,
David Moard, has considerable experience in research, development, manufacturing
and operations in energy-related companies. Our co-founder and a contributing
member of our scientific advisory panel for research and development, Leonard
Greiner, is an internationally recognized expert in fuels and propellants with
more than thirty years of experience in a wide variety of energy-related fields.

                                 --------------

    Our principal executive offices are located at 19300 Susana Road, Rancho
Dominguez, California 90221, and our telephone number is (310) 900-0400. We were
incorporated as a California corporation in November 1992.

                                       5
<PAGE>
                                  THE OFFERING

<TABLE>
<S>                                                 <C>
Common stock offered..............................  shares
Common stock to be outstanding after this
  offering........................................  shares
Use of proceeds...................................  For capital expenditures, research and
                                                    development, sales and marketing expenses,
                                                    working capital and general corporate
                                                    purposes. See "Use of Proceeds."
Proposed Nasdaq National Market Symbol............  HBTI
</TABLE>

    The number of shares of common stock to be outstanding after this offering:

    - is based on 12,377,352 shares of common stock outstanding as of
      August 30, 2000;

    - reflects the issuance of 4,862,158 shares of common stock and the sale of
      2,178,000 shares of common stock in connection with our reorganization of
      our subsidiaries that will occur immediately prior to the closing of this
      offering and will consolidate our assets. See "Certain Relationships and
      Related Transactions;"

    - reflects the issuance of 10,691,350 shares of common stock to Visteon in
      exchange for engineering services to be provided by Visteon. See "Certain
      Relationships and Related Transactions;"

    - reflects the issuance immediately prior to the closing of this offering of
      1,000,000 shares of common stock upon exercise of all outstanding warrants
      at an exercise price of $4.00 per share;

    - excludes 3,698,401 shares of common stock issuable upon exercise of
      options outstanding as of August 30, 2000 at a weighted average exercise
      price of $3.61 per share; and

    - excludes 504,599 shares of common stock available for grant under our 2000
      Stock Incentive Plan as of August 30, 2000.

    Except as otherwise indicated, the information in this prospectus:

    - assumes our common stock will be sold in this offering at an initial
      public offering price of $      per share; and

    - assumes no exercise of the underwriters' option to purchase additional
      shares of common stock to cover over-allotments.

                                       6
<PAGE>
                      SUMMARY CONSOLIDATED FINANCIAL DATA

    The following tables set forth our summary consolidated financial data. You
should read this information together with our consolidated financial statements
and the notes to those statements beginning on page F-1 of this prospectus, the
information under "Selected Consolidated Financial Data," "Capitalization" and
"Management's Discussion and Analysis of Financial Condition and Results of
Operations."

    The pro forma net loss per share, basic and diluted gives effect to the
issuance of 1,000,000 shares of common stock upon exercise of warrants, the
issuance of 4,862,158 shares of common stock and the sale of 2,178,000 shares of
common stock in connection with the reorganization of our subsidiaries to
consolidate our assets, and the issuance of 10,691,350 shares of common stock in
exchange for Visteon's engineering services. No adjustments have been made to
reflect federal income taxes because the pro forma income tax provision would be
zero.

<TABLE>
<CAPTION>
                                                                                      SIX MONTHS ENDED
                                                    YEAR ENDED DECEMBER 31,               JUNE 30,
                                                 ------------------------------      -------------------
                                                   1997       1998       1999          1999       2000
                                                 --------   --------   --------      --------   --------
                                                                                         (UNAUDITED)
                                                          (IN THOUSANDS, EXCEPT PER SHARE DATA)
<S>                                              <C>        <C>        <C>           <C>        <C>
STATEMENT OF OPERATIONS DATA:
Revenues.......................................  $   278    $   145    $ 1,238       $   516    $    76
Gross profit (loss)............................       99        (47)       132             9         76
Loss from operations...........................   (2,629)    (3,128)    (3,394)       (1,841)    (2,370)
Net loss.......................................  $(1,846)   $(2,244)   $(2,937)      $(1,511)   $(2,140)
                                                 =======    =======    =======       =======    =======
Pro forma net loss per share, basic and
  diluted......................................                        $ (0.10)                 $ (0.07)
                                                                       =======                  =======
Shares used in computing pro forma net loss per
  share, basic and diluted.....................                         28,285                   29,429
                                                                       =======                  =======
</TABLE>

    The balance sheet data on a pro forma basis assumes the issuance of
1,000,000 shares of common stock upon exercise of warrants, the issuance of
4,862,158 shares of common stock and the sale of 2,178,000 shares of common
stock in connection with the reorganization of our subsidiaries to consolidate
our assets, and the issuance of 10,691,350 shares of common stock in exchange
for Visteon's engineering services. The balance sheet data on a pro forma as
adjusted basis assumes the transactions described above and the sale of
shares of common stock in this offering at an assumed initial public offering
price of $  per share, after deducting the estimated underwriting discounts and
commissions and our estimated offering expenses.

<TABLE>
<CAPTION>
                                                                     AS OF JUNE 30, 2000
                                                              ----------------------------------
                                                                                      PRO FORMA
                                                               ACTUAL    PRO FORMA   AS ADJUSTED
                                                              --------   ---------   -----------
                                                                         (UNAUDITED)
                                                                        (IN THOUSANDS)
<S>                                                           <C>        <C>         <C>
BALANCE SHEET DATA:
Cash and cash equivalents...................................   $2,040     $16,930      $
Working capital.............................................    1,115      16,005
Total assets................................................    3,662      18,552
Net shareholders' equity....................................      875      15,859
</TABLE>

                                       7
<PAGE>
                                  RISK FACTORS

    INVESTING IN SHARES OF OUR COMMON STOCK INVOLVES A HIGH DEGREE OF RISK. IF
ANY OF THE FOLLOWING RISKS OCCUR, THE MARKET PRICE OF OUR SHARES OF COMMON STOCK
COULD DECLINE AND YOU COULD LOSE ALL OR PART OF YOUR INVESTMENT.

                         RISKS RELATING TO OUR COMPANY

WE HAVE A LIMITED OPERATING HISTORY ON WHICH TO BASE YOUR INVESTMENT DECISION.

    We have a limited operating history on which you can evaluate our business
and future prospects. We are in the early stage of development and our proposed
operations are subject to the risks inherent in the growth of a new business
enterprise, including the absence of any significant operating history. We began
to manufacture commercial units of our on-site hydrogen generation systems in
1997 and are now developing and field testing commercial units of our hydrogen
fuel processors for fuel cell systems. We have not yet begun to manufacture
either on-site industrial hydrogen generators or fuel processors for the fuel
cell market in significant quantities. The likelihood of our success must be
considered in light of the expenses, difficulties, complications, problems and
delays frequently encountered in connection with the growth of a new business,
the development of new technology, and the competitive environment in which we
operate. In light of the foregoing, it is difficult or impossible for us to
predict future results and you should not rely on our historical results of
operations as indications of future performance.

WE HAVE A HISTORY OF LOSSES SINCE OUR INCEPTION AND EXPECT FUTURE LOSSES AND
NEGATIVE CASH FLOW.

    Our business has generated significant losses and negative cash flow since
our inception and we expect our losses to continue. As of June 30, 2000, we had
an accumulated deficit of approximately $12.2 million. Continuing losses may
adversely affect the price of our common stock. In order to achieve
profitability or positive cash flow, we need to both increase our sales volumes
and reduce manufacturing costs of our products. Even if we do achieve
profitability, we cannot be certain that we will be able to sustain
profitability or positive cash flow.

WE MAY NOT BE ABLE TO COMPLETE THE DEVELOPMENT OF THE NECESSARY TECHNOLOGY TO
COMMERCIALIZE OUR PRODUCTS.

    Our success will depend upon our products meeting acceptable cost and
performance criteria, and upon their timely introduction into the marketplace.
Our product development efforts for hydrogen fuel processors and industrial
hydrogen generators may be subject to unanticipated and significant delays,
expenses and technical or other problems, as well as the possible lack of
funding to complete this development. Our proposed products and technologies may
never be successfully developed on a mass commercial scale, and even if
developed, they may not perform to commercially acceptable standards. We may
experience delays in meeting our development milestones or delays in achieving
performance goals relating to efficiency, cost-effectiveness, reliability and
service arrangements set by us or our customers. Failure to develop our products
for mass production or significant delays in the development of our products
would have a material adverse effect on our relationship with potential
customers, cause us to lose business and cause the market price of our common
stock to decline.

PRODUCT FAILURES IN OUR FIELD TESTS COULD NEGATIVELY IMPACT DEMAND FOR OUR
PRODUCTS.

    We are currently field testing our products both at our own facilities and
our customers' facilities. We have only recently begun to field test our
hydrogen processors for fuel cell systems. We may encounter problems and delays
during our field tests for a number of reasons, including the failure of our
technology or the technology of third parties, as well as the failure, of
ourselves or our customers, to maintain and service these units properly. Some
of these potential problems and delays are beyond our control. Any problem or
perceived problem with our field tests could materially harm our reputation and
impair market acceptance of, and demand for, our products, which would
substantially harm our business, financial condition and ability to achieve
profitability.

                                       8
<PAGE>
WE HAVE HAD LIMITED SALES OF OUR PRODUCTS AND WE MAY NEVER PRODUCE A
COST-EFFECTIVE PRODUCT FOR LARGE-SCALE MANUFACTURE.

    To date, we have derived revenues principally from research and development
contracts and from limited sales of our industrial hydrogen generating systems.
Our sales of hydrogen fuel processors for fuel cell systems have been limited to
demonstration and prototype models. Currently, the costs of producing our
products exceed the price of our products. To make our products commercially
viable, we must reduce the cost of producing our products. We may not be able to
produce any of our products in a cost-effective manner on a large commercial
scale, and, if produced, we may not be able to market these products
successfully. We expect the production costs of our initial commercial units to
be higher than their sales price and there can be no assurance that we will
attain higher production levels or that sales prices will ever exceed our
production costs.

WE ARE DEPENDENT ON RELATIONSHIPS WITH STRATEGIC PARTNERS.

    We have entered and plan to enter into relationships with a number of
strategic partners for the design, manufacture and distribution of our products
and the loss of or failure to develop any of these relationships could
materially impede our access to broad market opportunities. As part of our
agreement with Engelhard, we are relying on access to their proprietary catalyst
technology to develop commercial units of our stationary fuel cell systems. Upon
expiration of this agreement on December 31, 2001, Engelhard is not obligated to
license any of its proprietary catalyst technology to us and we may be unable to
develop or acquire, or may experience delays in developing or acquiring,
acceptable catalyst technology to develop our products. Any lack of access to
such technology could have a material adverse effect on our ability to
commercialize our stationary fuel systems on a timely basis.

    We have entered into a distribution agreement with Gaz de France for our
industrial hydrogen generating systems in Europe, but do not have any definitive
arrangements of significance for distribution in other parts of the world or for
our hydrogen fuel processors for fuel cell systems. Unless we can arrange for
distribution in these other markets and for our hydrogen fuel processors for
fuel cell systems, we will be required to develop our own distribution and
marketing network which will require substantial time, cost and effort.
Furthermore, Gaz de France may extend the period in which to make the minimum
number of purchases under our distribution agreement by an additional
12 months, which may delay our ability to terminate our distribution agreement
and implement alternative distribution arrangements.

    Our anticipated contract manufacturing arrangement with Visteon will make us
dependent upon Visteon for the large-scale manufacture of our hydrogen
processors for fuel cell systems. If Visteon does not provide us with the
necessary manufacturing support on commercially reasonable terms, we could
experience delays in obtaining alternative sources, or in developing our own
manufacturing expertise, to satisfy our manufacturing needs. These delays could
adversely affect our ability to manufacture and market our products.

    We cannot assure you that we will be able to obtain or maintain necessary
strategic relationships or that our current or future strategic partners will
provide us with the resources for marketing or manufacturing our products.

WE HAVE NO EXPERIENCE MANUFACTURING OUR PRODUCTS ON A LARGE-SCALE BASIS.

    We will need to significantly expand our manufacturing capability in order
to expand our business. While we intend to rely heavily on our anticipated
manufacturing alliance with Visteon for the production of our fuel cell
products, we may need to develop or obtain additional manufacturing expertise.
We may not be able to develop or obtain the necessary manufacturing expertise
for our hydrogen generators and fuel processors to be capable of satisfying
large commercial orders in time to meet our product commercialization schedule
or satisfy the requirements of our customers.

                                       9
<PAGE>
WE MAY NOT BE ABLE TO MANAGE THE RAPID EXPANSION OF OUR OPERATIONS SUCCESSFULLY.

    The rapid expansion of our manufacturing operations will place significant
demands on our managerial, technical, financial and other resources. We are
undergoing rapid growth in the number of our employees, the size and capability
of our manufacturing facility and the scope of our operations. We will be
required to make significant investments in our engineering and logistics
systems, and our financial and management information systems. There can be no
assurance that our management skills and the systems we currently have in place
will enable us to implement our expansion strategy successfully or that we will
be able to attract and retain skilled management and production personnel. Our
failure to manage our growth effectively would have a material adverse effect on
our business, financial condition and ability to achieve profitability.

WE FACE INTENSE COMPETITION AND MAY BE UNABLE TO COMPETE SUCCESSFULLY IN A
HIGHLY COMPETITIVE MARKET.

    The markets for hydrogen fuel processors for fuel cell applications and
on-site hydrogen generation are evolving rapidly and are extremely competitive
and there is no assurance that we can succeed. In the fuel cell market, there
are several companies currently developing a hydrogen processor to work with
fuel cells in stationary and transportation applications. In the industrial
hydrogen market, we compete with several other reforming technologies, including
other partial oxidation methods, electrolysis, steam methane and methanol
reforming. In addition, our on-site industrial hydrogen system competes with
merchant delivery of hydrogen. It is uncertain at this time which, if any, of
the technologies currently under development will ultimately become industry
standards and whether our technology and products will be accepted. Our
competitors range from development stage companies to major domestic and
international companies, many of which have:

    - substantially greater financial, technical, marketing and human resource
      capabilities;

    - established relationships with original equipment manufacturers;

    - name-brand recognition; and

    - established positions in the markets that we have targeted for
      penetration.

    These or other companies may succeed in developing and bringing to market
more quickly products or technologies that are more cost-effective than those
being developed by us or that would render our products and technology
non-competitive in the marketplace.

OUR SUCCESS DEPENDS HEAVILY ON OUR RELATIONSHIPS WITH A LIMITED NUMBER OF FUEL
CELL MANUFACTURERS.

    During the next few years, we expect that a significant portion of our
revenues will be derived from sales of our hydrogen processors for stationary
fuel cell systems. Commercial sales of our processors for fuel cell systems are
dependent on our products being compatible with the fuel cell systems of fuel
cell manufacturers and components of third party manufacturers and on the fuel
cell manufacturers' ability to sell these fuel cell systems to their customer
base. Our failure to make our fuel cell processors compatible with the products
of fuel cell manufacturers or component manufacturers, or the failure of these
manufacturers to design or make necessary modifications to their fuel cell
products to integrate our processors, would significantly impair or preclude our
ability to sell our products. We cannot predict with any degree of certainty
whether we will be able to make our hydrogen fuel processors compatible with the
fuel cell systems of potential customers to create a sufficient market for our
products. Furthermore, we cannot assure you that fuel cell manufacturers will be
able to market their fuel cell systems containing our units successfully, or
that they will not alter their acceptance of our fuel processor technology in
favor of other energy product solutions. Any design, manufacturing or marketing
problems encountered by manufacturers of fuel cell systems or components could
adversely affect the market for our hydrogen fuel processors. Due to the limited
number of fuel cell manufacturers, we may be required to provide volume
discounts or other allowances, which may reduce our profitability.

                                       10
<PAGE>
WE ARE DEPENDENT UPON A LIMITED NUMBER OF SUPPLIERS FOR KEY COMPONENTS OF OUR
PRODUCTS.

    Our results of operations will suffer if we are unable to maintain
relationships with suppliers on acceptable terms, or if these suppliers should
fail to deliver components on a timely basis that meet our quality, quantity or
cost standards. There are a limited number of suppliers for key components of
our products, including the major vessels, refractory linings, burner assembly
and preheat coils, air compressors, natural gas compressors and hydrogen
filters. QuestAir Technologies, Inc., a Canadian firm, manufactures the hydrogen
filter, which represents approximately 25% of the total cost of our on-site
industrial hydrogen unit. We rely on Engelhard to manufacture catalysts, which
are a key component for our hydrogen fuel processor for fuel cell systems. Due
to the relative importance of these two components, any change in the prices
and/or these components' availability could have a negative impact on our
ability to manufacture our products.

WE MAY NEED ADDITIONAL FINANCING, WHICH MAY NOT BE AVAILABLE TO US ON ACCEPTABLE
TERMS OR AT ALL.

    We expect that we may need additional financing in the future, which may not
be available to us on acceptable terms. We anticipate, based on current
proposals and assumptions relating to the implementation of our business plan,
that the net proceeds of this offering, together with the proceeds from the
issuance of shares to current shareholders immediately prior to this offering
and all other existing sources of capital, will be sufficient to satisfy our
funding requirements through the next 24 months. However, those funds may be
expended prior to that time due to changes in our business plan or unanticipated
changes in economic conditions or other circumstances. In the event that our
plans change, our assumptions change or prove to be inaccurate, or if the net
proceeds of this offering and projected revenues otherwise prove to be
insufficient to fund the implementation of our business plan or working capital
requirements, we could be required to seek additional financing sooner than
currently anticipated.

    We have no current arrangements with respect to any additional financing.
Consequently, there can be no assurance that any additional financing will be
available when needed or on commercially reasonable terms. Any inability to
obtain additional financing when needed would have a material adverse effect on
our ability to fund our research and development activities and on the
development of our manufacturing capabilities, which could require us to delay
our product development and commercialization schedule. Lack of adequate
financing may force us to reduce our sales and marketing efforts or forego
attractive business opportunities. If we raise additional funds through the
issuance of equity or convertible debt securities, your ownership percentage
will be reduced and you may experience significant dilution. In addition, to
attract investment capital, we may be required to issue securities that contain
rights, preferences or privileges that are senior to those of our common stock.

WE MAY BE UNABLE TO PROTECT OUR INTELLECTUAL PROPERTY RIGHTS AND OUR FAILURE TO
PROTECT THAT INTELLECTUAL PROPERTY COULD ADVERSELY AFFECT OUR COMPETITIVE
POSITION.

    Our ability to compete effectively against other companies designing
hydrogen fuel processors and generators will depend on our ability to maintain
the exclusive ownership of our technology systems, designs and manufacturing
processes through a combination of patent and trade secret protection,
non-disclosure agreements and other arrangements. Patents may not be issued
under pending or future applications or with the breadth of coverage sought by
us, and any issued patents that we hold may not provide adequate protection for
our products or processes. Effective patent, trademark, copyright and trade
secret protection may be unavailable, limited or not applied for in certain
countries. Moreover, patent applications filed in foreign countries are subject
to laws, rules and procedures that differ from those of the United States and
any resulting patents may be difficult to enforce. There can be no assurance
that our competitors will not either independently develop or acquire
proprietary information that is substantially similar or superior to ours or
obtain access to our proprietary information.

                                       11
<PAGE>
    There can be no assurance that we would prevail if challenges to our
intellectual property rights are asserted by third parties against us. We could
incur substantial costs defending patent infringement suits brought by others
and prosecuting patent infringement suits against third party infringers. If we
are found to be infringing third party patents, we do not know whether we will
be able to obtain licenses to use such patents or on acceptable terms. Failure
to obtain needed licenses could delay or prevent the development, manufacture or
sale of our hydrogen fuel processors and generators. Competitors' products may
infringe upon our patents and the cost of protecting our rights may be
substantial, if not cost prohibitive, thereby undermining our ability to protect
our products effectively. We also rely on confidentiality agreements with our
employees and third parties to protect our proprietary and intellectual
property, including intellectual property that may not be patented or
patentable, know-how and trade secrets, but we may not be successful in
enforcing compliance with the terms of these agreements. Our inability to
maintain the proprietary nature of our technology and processes could harm our
business, prospects, results of operations and financial condition.

WE COULD BE LIABLE FOR ENVIRONMENTAL DAMAGES RESULTING FROM OUR RESEARCH,
DEVELOPMENT AND MANUFACTURING OPERATIONS.

    Our business is subject to numerous laws and regulations that govern
environmental protection. These laws and regulations have changed frequently in
the past and it is reasonable to expect additional changes in the future. Our
operations may not comply with future laws and regulations and we may be
required to make significant unanticipated capital and operating expenditures.
If we fail to comply with applicable environmental laws and regulations,
governmental authorities may seek to impose fines and penalties on us or to
revoke or deny the issuance or renewal of operating permits and private parties
may seek damages from us. Under those circumstances, we might be required to
curtail or cease operations, conduct site remediation or other corrective
action, or pay substantial damage claims. Our business also exposes us to the
risk of accidental releases of hazardous or flammable materials, such as natural
gas and hydrogen, which could result in personal injury or damage to property.
Depending on the nature of the claim, our current insurance policies may not
adequately reimburse us for costs incurred in settling environmental damage
claims, and in some instances, we may not be reimbursed at all for these costs.

OUR SUCCESS DEPENDS ON ATTRACTING AND RETAINING KEY PERSONNEL.

    The successful development, marketing and manufacturing of our products will
depend on our ability to attract and retain a highly skilled management team and
specialized workforce, including scientists, engineers, researchers, and
manufacturing and marketing professionals. Based on our planned expansion, we
will require a significant increase in the number of our employees and outside
contractors. Because a large portion of our expense relates to personnel that
cannot be easily reduced without adversely affecting our business plan, we may
not effectively adjust spending to compensate for revenue shortfalls, which
would increase our losses and negative cash flow or reduce, or eliminate, any
operating income. We do not maintain "key-man" life insurance policies on any of
our personnel.

WE ARE SUBJECT TO RISKS INHERENT IN INTERNATIONAL OPERATIONS.

    We have only recently begun to sell and license our products and
technologies internationally and our success depends, in part, on our ability to
secure foreign customers and our ability to manufacture products that meet
foreign regulatory and commercial requirements. We have limited experience
developing and manufacturing our products to comply with the commercial and
legal requirements of international markets. In addition, we are subject to
tariff regulations and requirements for export licenses, particularly with
respect to the export of certain technologies. We face numerous challenges in
our international expansion, including unexpected changes in regulatory
requirements, fluctuations in currency exchange rates, longer accounts
receivable requirements and collections, difficulties in managing international
operations, potentially adverse tax consequences, restrictions on repatriation
of earnings and the burdens of complying with a wide variety of foreign laws.

                                       12
<PAGE>
                         RISKS RELATING TO OUR INDUSTRY

IF THE MARKETS FOR FUEL CELL SYSTEMS AND INDUSTRIAL HYDROGEN GENERATION DO NOT
EXPAND AS WE ANTICIPATE, OR IF ALTERNATIVES TO OUR PRODUCTS ARE SUCCESSFUL, OUR
BUSINESS WILL SUFFER.

    A significant market may never develop for our products or may develop more
slowly than we anticipate, resulting in our inability to generate sufficient
revenue to attain profitability. Fuel cell products for stationary and
transportation applications represent an emerging market and we do not know
whether our targeted distributors, resellers or end-users will purchase our
hydrogen fuel processors for fuel cell products. To date, the market for on-site
hydrogen generation has generally been limited to large-scale steam methane
reformers and we cannot assure you that a market will develop for our on-site
industrial hydrogen generators. The development of a significant market for our
products may be impacted by many factors, some of which are out of our control,
including:

    - the future costs of natural gas, propane, diesel, gasoline, methane and
      other fuels used by our systems;

    - environmental and other regulatory requirements;

    - the emergence of newer, more competitive technologies and products;

    - cost competitiveness of our systems with competing products;

    - consumer reluctance to try our systems; and

    - consumer perception of the safety and reliability of our products.

    Due to these factors, we cannot anticipate with any degree of certainty what
our revenues and profitability, if any, will be in future periods. If we do
achieve profitability, we cannot be certain that we can sustain or increase
profitability on a quarterly or annual basis in the future. If we fail to do so,
the market price for our common stock could suffer.

THE FUELS ON WHICH OUR PRODUCTS RELY MAY NOT BE AVAILABLE ON A COST-EFFECTIVE
BASIS.

    Our products require fuels or "feedstocks" to operate, such as natural gas,
propane, diesel, gasoline, methane and other hydrocarbon products. Such
feedstocks may not be available on a cost-effective basis in the future. Even if
these fuels are available, if our systems are unable to produce hydrogen at a
cost that is comparable to hydrogen supplied by merchant gas companies or
electricity provided through the electric grid system, potential customers will
be less likely to purchase our products.

CHANGES IN GOVERNMENT POLICIES AND REGULATIONS COULD IMPAIR DEMAND FOR OUR
PRODUCTS.

    Government regulation of our systems at the federal, state or local level
could increase our costs and, therefore, harm our business, prospects and
financial condition. Our products and their installation are subject to state
and local ordinances relating to building codes, safety, utility connections,
environmental protection and related matters. At this time, we cannot anticipate
which jurisdictions, if any, will impose regulations directed at our products or
their use. We also do not know the extent to which any existing or new
regulations may impact our ability to distribute, install and service our
products. Stationary power systems cannot be operated without permits in many,
if not all, of the markets in which we will be marketing and selling our
products. The inability of our potential customers to obtain a permit, or the
inconvenience often associated with the permit process, could harm demand for
our products. As we distribute our products to our early target markets,
federal, state or local government entities or competitors may seek to impose
regulations impacting us directly or indirectly. Further, our principal target
markets for our hydrogen fuel processors for fuel cell systems are the
stationary and transportation markets and our business will suffer if
environmental policies change and no longer encourage the development and growth
of these markets.

                                       13
<PAGE>
OUR PRODUCTS USE INHERENTLY DANGEROUS, FLAMMABLE FUELS THAT COULD SUBJECT OUR
BUSINESS TO PRODUCT LIABILITY CLAIMS.

    Our business exposes us to potential product liability claims that are
inherent in hydrogen and products that use hydrogen. Hydrogen is a flammable gas
and therefore a potentially dangerous product. Hydrogen is typically generated
from gaseous and liquid fuels that are also flammable and dangerous, such as
propane, natural gas or methane, in a process known as reforming. Natural gas
and propane could leak into a residence or commercial location and combust if
ignited by another source. Any accidents involving our systems or other
hydrogen-based products could materially impede widespread market acceptance and
demand for our products. In addition, we may be held responsible for damages
beyond the scope of our insurance coverage. We also cannot predict whether we
will be able to maintain our insurance coverage on acceptable terms.

UTILITY COMPANIES COULD PLACE BARRIERS ON OUR ENTRY INTO THE MARKET FOR
RESIDENTIAL POWER, WHICH WOULD REDUCE DEMAND FOR OUR PRODUCTS.

    If utility companies begin to charge fees to residential customers for using
less electricity, using the grid for backup purposes only or disconnecting from
the grid altogether, these fees could increase the cost to residential customers
of using fuel cell systems that contain our hydrogen fuel processors, making
them less cost-effective and less attractive to potential customers. Though
these fees are currently charged only to industrial users, it is possible that,
as the market for residential power generation develops, utility companies could
charge similar fees to residential customers in the future.

WE FACE RAPID TECHNOLOGICAL CHANGE IN OUR MARKETS THAT COULD MAKE OUR PRODUCTS
LESS DESIRABLE.

    Our product is one of a number of hydrogen processing systems being
developed today. Technological advances in alternative hydrogen processing
systems or fuels may render our existing proprietary technology and systems
obsolete. Future advances in technology may not be beneficial to, or compatible
with, our business. Further, we may not use new technologies effectively or
adapt our proprietary technology and hydrogen-processing systems to user
requirements or emerging industry standards on a timely basis. Our ability to
remain technologically competitive may require substantial expenditures and
lead-time. If we are unable, for technical, legal, financial or other reasons,
to adapt in a timely manner to changing market conditions or user requirements,
our business, financial condition and results of operations could be seriously
harmed.

                         RISKS RELATING TO THE OFFERING

OUR QUARTERLY OPERATING RESULTS ARE LIKELY TO BE VOLATILE IN THE FUTURE.

    Our quarterly operating results are likely to vary significantly in the
future. Fluctuations in our quarterly financial performance may result from, for
example:

    - unevenness in demand and orders for our products;

    - significant short-term capital expenses as we develop our manufacturing
      facilities;

    - a shortage of the raw materials used in the production of our hydrogen
      fuel processors; and

    - difficulties with our manufacturing operations.

    Because of these anticipated fluctuations, our sales and operating results
between fiscal quarters are likely to be inconsistent, may not be indicative of
our future performance and may be difficult for investors to evaluate properly.
As a result, the market price of our common stock may be adversely affected.

OUR STOCK PRICE MAY BE VOLATILE.

    Prior to this offering there has been no public market for our common stock.
We cannot predict the extent to which, or if, investor interest will lead to the
development of an active and liquid trading

                                       14
<PAGE>
market. The initial public offering price for the shares of our common stock has
been determined by negotiations between us and the representatives of the
several underwriters and may not be indicative of the market price of our common
stock that will prevail in the trading market. The market price of our common
stock may decline below the initial public offering price and this decline may
be significant. The value of your investment could decline due to the impact of
any of the following factors upon the market price of our common stock:

    - variations in our actual and anticipated operating results;

    - changes in our earnings estimates by research analysts;

    - our failure to meet analysts' performance expectations; and

    - lack of liquidity.

    In addition, stock markets, particularly the Nasdaq National Market, have
experienced extreme price and volume fluctuations, and the market prices of
securities of technology companies have been highly volatile. These fluctuations
are often unrelated to operating performance and may adversely affect the market
price of our common stock. As a result, you may not be able to sell your shares
at or above the initial public offering price.

OUR CHARTER PROVISIONS CONTAIN LIMITATIONS ON OUR SHAREHOLDERS' RIGHTS, WHICH
MAY AFFECT THE PRICE OF OUR STOCK.

    Upon completion of this offering, our board of directors will have the
authority to issue shares of preferred stock and to determine the price, rights,
preferences, privileges and restrictions, including voting rights, of those
shares without any further vote or action by you. Your rights will be subject
to, and may be adversely affected by, the rights of the holders of any preferred
stock that may be issued in the future. The issuance of preferred stock, while
providing flexibility in connection with possible acquisitions and other
corporate purposes, could have the effect of making it more difficult for a
third party to acquire a majority of our outstanding voting stock.

    Our charter documents also provide for limitations on the ability of
shareholders to call special meetings and act by written consent and prohibit
cumulative voting for directors. The charter documents also establish advance
notice requirements for nominations for election to the board of directors or
for proposing matters that can be acted on by shareholders at shareholder
meetings. Provisions in our articles and bylaws could substantially impede a
change of control or changes in our management that you might consider
favorable. See "Description of Capital Stock" for a description of these
provisions. If a change of control or change in management is delayed or
prevented, the market price of our common stock could decline.

OUR PRINCIPAL SHAREHOLDERS, EXECUTIVE OFFICERS AND DIRECTORS HAVE SUBSTANTIAL
CONTROL OVER OUR AFFAIRS AND YOU WILL NOT BE ABLE TO INFLUENCE THE OUTCOME OF
MANY IMPORTANT TRANSACTIONS OR BUSINESS POLICIES.

    After consummation of this offering, executive officers, directors and
shareholders who beneficially own more than 5% of our common stock will have the
power, in the aggregate, to direct the vote of approximately   % of our voting
securities. Therefore, these persons may have the power to influence our
business policies and affairs and determine the outcome of any matter submitted
to a vote of our shareholders, including mergers, sales of substantially all of
our assets and changes in control. These stockholders may use their influence to
approve or take actions that are adverse to your interests. A concentration of
such voting power may have a negative impact on the market price of our common
stock. See "Principal Shareholders" for more information on the stock holdings
of our directors, officers and large shareholders.

                                       15
<PAGE>
FUTURE SALES OF OUR COMMON STOCK MAY CAUSE OUR STOCK PRICE TO DECLINE.

    If our shareholders sell, or if there is a perception that our shareholders
intend to sell, substantial amounts of our common stock in the public market
following this offering, including shares issued upon the exercise of
outstanding options, the trading price of our common stock could fall. Such
sales also might make it more difficult for us to raise capital in the future at
a time and price that we deem appropriate. Upon completion of this offering, we
will have outstanding             shares of common stock (based upon shares
outstanding as of August 30, 2000), assuming no exercise of outstanding options
after August 30, 2000. Of these shares, the             shares sold in this
offering will be freely tradable. Other shares will be eligible for sale in the
public market after the date of this prospectus, substantially all of which are
subject to lock-up agreements, and, in some cases, to the holding period, volume
limitations and other requirements of Rule 144 under the Securities Act. Within
180 days after the date of this prospectus,          shares will be available
for sale. In addition, at various times thereafter, at such times as the
relevant one-year holding periods for such shares expire,       shares shall
become available for sale.

    Sofinov Societe Financiere d'Innovation, Inc., who will hold 7,466,905
shares of our common stock, will be entitled to certain rights beginning
180 days after this offering with respect to registration of its shares under
the Securities Act. These rights may permit Sofinov to request registration of
25% of its holdings six months after this offering and the balance of its
holdings one year after this offering. In addition, the exercise of these
registration rights may allow Sofinov to sell its shares in the market in
connection with any future public offerings by us of our equity securities. See
"Description of Capital Stock--Registration Rights".

    We cannot predict if future sales of our common stock, or the availability
of our common stock, will harm the market price for our common stock or our
ability to raise capital by offering equity securities.

WE DO NOT INTEND TO PAY ANY DIVIDENDS ON OUR COMMON STOCK IN THE FORESEEABLE
FUTURE.

    We have not paid any cash dividends on our common stock and we do not intend
to pay any dividends on our common stock for the foreseeable future. We
currently intend to retain all of our earnings, if any, to finance the
development and growth of our business. The failure to pay dividends may have an
adverse effect on the market price of our common stock and the return on your
investment.

YOU WILL EXPERIENCE IMMEDIATE AND SUBSTANTIAL DILUTION.

    If you purchase common stock in this offering, you will incur immediate and
substantial dilution in the net tangible book value of the shares purchased.
This dilution will be approximately $      per share, at the initial public
offering price of $      per share. Additional dilution will occur upon the
exercise of outstanding stock options and will also cause your percentage
ownership to decrease. See "Dilution" for more information on the dilution that
you will incur.

OUR MANAGEMENT MAY NOT USE THE PROCEEDS FROM THIS OFFERING EFFECTIVELY.

    If our management does not use the proceeds from this offering effectively,
we may not be able to operate and grow our business successfully. The net
proceeds of this offering are estimated to be approximately $      million, at
the assumed initial public offering price of $      per share, after deducting
the estimated underwriting discount and our estimated offering expenses. At
present, we have wide ranges in planned expenditures to be funded with the
proceeds due to our need to retain flexibility to respond to factors affecting
our business. Accordingly, our management will retain broad discretion as to the
allocation of the proceeds of this offering and may use such proceeds in a
manner with which you may not agree. See "Use of Proceeds" for more information
regarding the use of proceeds from this offering.

                                       16
<PAGE>
               SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS

    This prospectus, including the sections entitled "Prospectus Summary," "Risk
Factors," "Use of Proceeds," "Management's Discussion and Analysis of Financial
Condition and Results of Operations," and "Business" contains forward-looking
information. This forward-looking information is subject to risks and
uncertainties including the factors listed under "Risk Factors," "Management's
Discussion and Analysis of Financial Condition and Results of Operations" and
"Business," as well as elsewhere in this prospectus. In some cases, you can
identify forward-looking statements by terminology such as "may," "will,"
"should," "expects," "intends," "plans," "anticipates," "believes," "estimates,"
"predicts," "potential" or "continue," or the negative of these terms or other
comparable terminology. These statements are only predictions and may be
inaccurate. Actual events or results may differ materially. In evaluating these
statements, you should specifically consider various factors, including the
risks outlined under "Risk Factors." These factors may cause our actual results
to differ materially from any forward-looking statement. Although we believe
that the expectations reflected in the forward-looking statements are
reasonable, we cannot guarantee future results, level of activity, performance
or achievements.

                                       17
<PAGE>
                                USE OF PROCEEDS

    We estimate our net proceeds from the sale of the             shares of
common stock in this offering will be approximately $      million, based upon
an assumed initial public offering price of $      per share and after deducting
estimated underwriting discounts and commissions and estimated offering expenses
payable by us. If the underwriters exercise their over-allotment option in full,
our net proceeds will be approximately $            million.

    We intend to use the net proceeds of this offering for capital expenditures,
research and development, sales and marketing expenses, working capital and
general corporate purposes. As of the date of this prospectus, we have not
allocated any specific amount of the proceeds for the purposes listed. Our
management will have significant flexibility and discretion in applying the net
proceeds of this offering. The amounts actually expended for the purposes listed
above will depend upon a number of factors, including the growth of our product
sales and competitive developments in our markets.

    From time to time, we evaluate possible acquisitions of, or investments in,
businesses, products and technologies that are complementary to our business or
product lines. A portion of the net proceeds may be used to fund acquisitions or
investments. We currently have no arrangements, agreements or understandings,
and are not engaged in active negotiations for any such acquisitions or
investments, except for discussions relating to one potential, non-material
acquisition, which, if consummated, would not exceed $250,000 in purchase price.

    Pending their use for the purposes listed above, we intend to invest the net
proceeds of this offering in short-term, interest-bearing, investment grade
securities.

                                DIVIDEND POLICY

    We have never declared nor paid cash dividends on our capital stock. We
currently intend to retain all available funds for use in the operation and
expansion of our business and do not anticipate paying any cash dividends in the
foreseeable future. Any future determination to pay dividends will be at the
discretion of our board of directors and will depend on our results of
operations, financial conditions, contractual and legal restrictions and other
factors the board deems relevant.

                                       18
<PAGE>
                                 CAPITALIZATION

    The following table sets forth our capitalization as of June 30, 2000:

    - on an actual basis;

    - on a pro forma basis to reflect the issuance of 4,862,158 shares of common
      stock and the sale of 2,178,000 shares of common stock in connection with
      the reorganization of our subsidiaries to consolidate our assets, the
      issuance of 1,000,000 shares of common stock upon exercise of all
      outstanding warrants and the issuance of 10,691,350 shares of common stock
      in exchange for Visteon's engineering services; and

    - on a pro forma as adjusted basis to reflect the transactions described
      above and the sale of             shares of common stock in this offering
      at an assumed initial public offering price of $      per share, after
      deducting the estimated underwriting discounts and commissions and our
      estimated offering expenses.

<TABLE>
<CAPTION>
                                                                     AS OF JUNE 30, 2000
                                                              ----------------------------------
                                                                                      PRO FORMA
                                                               ACTUAL    PRO FORMA   AS ADJUSTED
                                                              --------   ---------   -----------
                                                              (IN THOUSANDS, EXCEPT SHARE DATA)
<S>                                                           <C>        <C>         <C>
Cash and cash equivalents...................................  $  2,040   $ 16,930      $
                                                              ========   ========      =======
Loans and notes payable, including current portion..........       749        749          749
Minority interest...........................................        94         --           --
Shareholders' equity:
  Common stock: 30,000,000 shares authorized and 11,307,352
    shares issued and outstanding, actual; 200,000,000
    shares authorized and 30,038,860 shares issued and
    outstanding, pro forma;       shares issued and
    outstanding, pro forma as adjusted......................    13,090     28,074
Accumulated deficit.........................................   (12,215)   (12,215)
                                                              --------   --------      -------
  Net shareholders' equity..................................       875     15,859
                                                              --------   --------      -------
    Total capitalization....................................  $  1,718   $ 16,608      $
                                                              ========   ========      =======
</TABLE>

    The number of shares of common stock issued and outstanding as of June 30,
2000:

    - excludes 2,628,000 shares of common stock issuable upon exercise of
      options outstanding at June 30, 2000, at a weighted average exercise price
      of $3.04 per share; and

    - excludes 896,950 shares of common stock available for grant under our
      incentive stock option plan at June 30, 2000.

                                       19
<PAGE>
                                    DILUTION

    Dilution per share to new investors represents the difference between the
amount per share paid by purchasers of our common stock in this offering and the
net tangible book value per share as adjusted of our common stock immediately
after completion of the offering. Pro forma net tangible book value per share
represents the amount of our total assets less total liabilities, divided by
            shares of common stock outstanding as of June 30, 2000, after giving
effect to the issuance of 4,862,158 shares of common stock and the sale of
2,178,000 shares of common stock in the reorganization of our subsidiaries to
consolidate our assets, the issuance of 1,000,000 shares of common stock upon
exercise of all outstanding warrants and the issuance of 10,691,350 shares of
common stock in exchange for Visteon's engineering services.

    As of June 30, 2000, we had a pro forma net tangible book value of
$15.9 million, or $0.53 per share of common stock. After giving effect to the
sale of the             shares of common stock offered by this prospectus at an
assumed initial public offering price of $      per share, and after deducting
the estimated underwriting discounts and commissions and our estimated offering
expenses, our pro forma net tangible book value on an as adjusted basis, as of
June 30, 2000, would have been $      million, or $  per share. This represents
an immediate increase in net tangible book value on a pro forma as adjusted
basis of $      per share to our existing stockholders and an immediate dilution
of $      per share to new investors in this offering.

    The following table illustrates this per share dilution:

<TABLE>
<S>                                                           <C>        <C>
Assumed initial public offering price per share.............             $
  Pro forma net tangible book value per share at June 30,
    2000....................................................   $0.53
  Increase in pro forma net tangible book value per share
    attributable to this offering...........................

Pro forma net tangible book value per share after this
  offering..................................................
                                                                         -------
Dilution in pro forma net tangible book value per share to
  new investors.............................................             $
                                                                         =======
</TABLE>

    The following table sets forth, as of June 30, 2000 after giving effect to
the offering, the number of shares of common stock issued by us, the total
consideration paid in cash or other consideration for those shares and the
average price per share paid in cash or other consideration by existing
shareholders and by new investors. The table is presented assuming the issuance
of 4,862,158 shares of common stock and the sale of 2,178,000 shares of common
stock in the reorganization of our subsidiaries to consolidate our assets, the
issuance of 1,000,000 shares of common stock upon the exercise of all
outstanding warrants and the issuance of 10,691,350 shares of common stock in
exchange for Visteon's engineering services all occurred on June 30, 2000.

<TABLE>
<CAPTION>
                                          SHARES PURCHASED       TOTAL CONSIDERATION
                                        ---------------------   ----------------------   AVERAGE PRICE PER
                                          NUMBER     PERCENT      AMOUNT      PERCENT          SHARE
                                        ----------   --------   -----------   --------   -----------------
<S>                                     <C>          <C>        <C>           <C>        <C>
Existing shareholders.................  30,038,860        %     $28,074,000        %           $0.93
New investors.........................
                                        ----------     ---      -----------     ---
  Total...............................                 100%     $               100%
                                        ==========     ===      ===========     ===
</TABLE>

    Each of the above tables excludes:

       - up to           shares that may be issued by us pursuant to the
         underwriters' over-allotment option; and

       - 2,628,000 shares of common stock issuable upon exercise of stock
         options outstanding as of June 30, 2000, at a weighted average exercise
         price of $3.04 per share.

    To the extent these shares are issued, new investors will be further
diluted. See "Management" and the notes to our financial statements included
elsewhere in this prospectus.

                                       20
<PAGE>
                      SELECTED CONSOLIDATED FINANCIAL DATA

    The following selected consolidated financial data should be read in
conjunction with our consolidated financial statements and related notes thereto
and "Management's Discussion and Analysis of Financial Condition and Results of
Operations" included elsewhere in this prospectus. The statement of operations
for the years ended December 31, 1997, 1998 and 1999 and the balance sheet data
as of December 31, 1998 and 1999 have been derived from our financial statements
that have been audited by KPMG LLP, our independent auditors, which are included
elsewhere in this prospectus. The balance sheet and statement of operations data
as of and for the year ended December 31, 1995 have been derived from our
unaudited financial statements, and the balance sheet and statement of
operations data as of and for the years ended December 31, 1996 and 1997 have
been derived from our audited financial statements, which are not included in
this prospectus. The statement of operations data for the six-month periods
ended June 30, 1999 and 2000 and the balance sheet data as of June 30, 2000 are
derived from our unaudited financial statements included in this prospectus and,
in the opinion of management, include all adjustments, consisting only of normal
recurring adjustments, necessary for a fair presentation of our results of
operations and financial condition for those periods. Results for any interim
period are not necessarily indicative of the results that may be expected for
any other interim period or for a full year.

    The pro forma net loss per share basic and diluted gives effect to the
issuance of 1,000,000 shares of common stock upon exercise of warrants, the
issuance of 4,862,158 shares of common stock and the sale of 2,178,000 shares of
common stock in connection with the reorganization of our subsidiaries to
consolidate our assets and the issuance of 10,691,350 shares of common stock in
exchange for Visteon's engineering services. No adjustments have been made to
reflect federal income taxes because the pro forma income tax provision would be
zero.

<TABLE>
<CAPTION>
                                                                                                              SIX MONTHS ENDED
                                                               YEAR ENDED DECEMBER 31,                            JUNE 30,
                                                 ----------------------------------------------------      ----------------------
                                                   1995       1996       1997       1998       1999          1999          2000
                                                 --------   --------   --------   --------   --------      --------      --------
                                                                                                                (UNAUDITED)
                                                                      (IN THOUSANDS, EXCEPT PER SHARE DATA)
<S>                                              <C>        <C>        <C>        <C>        <C>           <C>           <C>
STATEMENT OF OPERATIONS DATA:
Revenues.......................................  $    46    $   141    $   278    $   145    $ 1,238       $   516       $    76
Cost of sales..................................       41         98        179        192      1,106           507            --
                                                 -------    -------    -------    -------    -------       -------       -------
Gross profit (loss)............................        5         43         99        (47)       132             9            76
Operating expenses:
  Selling, general and administrative
    expenses...................................       24      1,615      1,906      1,782      2,216         1,114         1,700
  Research and development expenses............       --        787        822      1,299      1,310           736           746
                                                 -------    -------    -------    -------    -------       -------       -------
Loss from operations...........................      (19)    (2,359)    (2,629)    (3,128)    (3,394)       (1,841)       (2,370)
Interest income (expense), net.................       --         (4)        20         91        (30)          (19)          (31)
Minority interest in net loss of
  subsidiaries.................................       --        632        763        793        487           349           261
                                                 -------    -------    -------    -------    -------       -------       -------
Net loss.......................................  $   (19)   $(1,731)   $(1,846)   $(2,244)   $(2,937)      $(1,511)      $(2,140)
                                                 =======    =======    =======    =======    =======       =======       =======
Pro forma net loss per share, basic and
  diluted......................................                                              $ (0.10)                    $ (0.07)
                                                                                             =======                     =======
Shares used in computing pro forma net loss per
  share, basic and diluted.....................                                               28,285                      29,429
                                                                                             =======                     =======
</TABLE>

<TABLE>
<CAPTION>
                                                                             AS OF DECEMBER 31,                    AS OF JUNE 30,
                                                            ----------------------------------------------------   --------------
                                                              1995       1996       1997       1998       1999          2000
                                                            --------   --------   --------   --------   --------   --------------
                                                                                                                    (UNAUDITED)
                                                                                       (IN THOUSANDS)
<S>                                                         <C>        <C>        <C>        <C>        <C>        <C>
BALANCE SHEET DATA:
Cash and cash equivalents.................................   $   96     $2,469     $  743    $   157    $   352        $ 2,040
Working capital...........................................      268      1,604       (281)    (1,307)      (579)         1,115
Total assets..............................................      257      3,119      2,136      1,537      1,687          3,662
Long term debt, less current portion......................      298        328        362        341        657            500
Net shareholders' equity (deficiency).....................      (30)       733       (523)    (1,245)    (1,085)           875
</TABLE>

                                       21
<PAGE>
                    MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                 FINANCIAL CONDITION AND RESULTS OF OPERATIONS

    THE FOLLOWING DISCUSSION OF OUR FINANCIAL CONDITION AND RESULTS OF
OPERATIONS SHOULD BE READ IN CONJUNCTION WITH OUR FINANCIAL STATEMENTS, THE
NOTES TO THOSE FINANCIAL STATEMENTS AND OTHER FINANCIAL INFORMATION APPEARING
ELSEWHERE IN THIS PROSPECTUS. THE FOLLOWING SECTION CONTAINS FORWARD-LOOKING
STATEMENTS INCLUDING, WITHOUT LIMITATION, STATEMENTS RELATING TO OUR PLANS,
STRATEGIES, OBJECTIVES, EXPECTATIONS, INTENTIONS AND RESOURCES. SEE "SPECIAL
NOTE REGARDING FORWARD-LOOKING STATEMENTS."

OVERVIEW

    We are a leading designer and developer of hydrogen fuel processors for fuel
cell systems and industrial hydrogen generators. Because fuel cells require
hydrogen to produce electricity, the efficient and cost effective production of
hydrogen for fuel cells is critical to the commercial introduction of fuel cell
systems into the mass transportation and stationary markets. We have developed
and patented the Under-Oxidized Burner (UOB-TM-), an innovative technology for
hydrogen production. In comparison to other means of producing hydrogen, we
believe our products provide more efficiency, lower emissions, lower capital
costs and greater fuel-flexibility. Our proprietary UOB-TM- system produces
hydrogen from hydrocarbon feedstocks, such as natural gas, propane, diesel and
gasoline, and can be utilized as an on-site source of hydrogen in a variety of
applications. Since 1993, we have completed substantial field-testing and have
successfully demonstrated our products to a number of leading fuel cell
manufacturers and industrial gas companies.

    On June 20, 2000, we entered into a letter of intent for an exclusive
engineering, manufacturing and development alliance with Visteon Corporation
with respect to the development and manufacture of our hydrogen fuel processors
for fuel cell systems. Visteon is the world's second largest supplier of
automotive systems, modules and components to global vehicle manufacturers.
Based on our letter of intent, we intend to enter into an engineering services
agreement with Visteon pursuant to which Visteon has commenced and will continue
to provide us over the three year term of the agreement, with:

    - its system engineering expertise to develop our own core competency to
      implement pre-production design and manufacturing systems processors;

    - engineering design and support services to establish one of our current
      facilities as a prototyping facility for the development, testing and
      design of our hydrogen fuel cell processors, with the capability of
      manufacturing approximately 2,000 units per year and potentially up to
      5,000 units per year; and

    - advice and training regarding the required infrastructure and processes
      necessary for supporting business functions to operate the facility,
      including recruitment and training of technical personnel, supplier
      development and fault reporting and containment.

    In addition to the engineering services agreement, we will enter into a
separate joint development agreement with Visteon to develop, own and exploit
jointly the proprietary design and manufacturing technology and know-how related
to our hydrogen fuel cell processors and, pursuant to a separate contract
manufacturing agreement, Visteon will build or dedicate a Visteon manufacturing
plant to manufacture, on a contract basis, substantially all commercial
production units of our hydrogen fuel processors for fuel cell systems. We
believe that our relationship with Visteon will significantly accelerate our
efforts to achieve large-scale commercial production of our hydrogen fuel
processors for fuel cell systems and produce higher quality and more
cost-efficient products.

    Upon the signing of the engineering services agreement with Visteon, we will
issue 10,691,350 shares of our common stock to Visteon for engineering services.
We will value these shares of common stock issued pursuant to the agreement at
approximately $53.5 million. The value will be recorded as a

                                       22
<PAGE>
reduction in our shareholders' equity and this amount will be amortized into
operating expenses over the period that Visteon provides us with engineering
services under our agreement.

    REVENUES

    We record revenues from the sale of our products and from research and
development performed on behalf of other organizations. Revenues from product
sales are recorded when shipped and we record deferred revenue until shipment of
our products has taken place. Our revenues from research and development
activities are recorded using the percentage of completion method of accounting.

    Since inception, virtually all of our revenues have been derived from sales
of our on-site industrial hydrogen generation systems to the merchant gas
industry, from research and development contracts and sales of pre-production
hydrogen fuel processors to fuel cell manufacturers, government entities, and
other research agencies. We expect that revenues attributable to research and
development arrangements will become less significant to our operations in the
future.

    COST OF SALES

    Cost of sales consists primarily of the cost of compensation and benefits
for manufacturing staff, and related engineering and support staff, as well as
materials and supplies used in the manufacturing process. Our cost of sales for
our products has been greater than the revenues that we receive for our
products. We expect our gross margins will increase in the future as our
commercial units manufactured under our anticipated relationship with Visteon
should be at a significantly lower average cost than our current average cost on
our units.

    SELLING, GENERAL AND ADMINISTRATIVE EXPENSES

    Our selling, general and administrative expenses consist primarily of
compensation and benefits for our sales and marketing personnel, as well as our
corporate staff. These expenses also contain our professional fees and
facilities costs, including lease payments. We expect our selling, general and
administrative expenses to increase as we hire additional employees, expand our
infrastructure, increase our manufacturing volume and grow our operations in
response to increased demand for our products and technology.

    RESEARCH AND DEVELOPMENT EXPENSES

    Our research and development expenses consist primarily of salaries and
benefits for research and development personnel, costs of research and
development equipment and materials and other costs associated with the
development of our technologies. We expect to increase our research and
development expenses as we continue to invest in the development of our
products. A significant portion of our research and development expenses are
funded under cost reimbursement research contracts and have been accounted for
as a reduction of research and development costs incurred.

    INTEREST INCOME (EXPENSE), NET

    Interest income (expense), net, is primarily attributable to interest income
from cash on hand from our private financings and interest expense associated
with our notes payable to investors.

    MINORITY INTEREST IN NET LOSSES OF SUBSIDIARIES

    Minority interest in net losses of subsidiaries represents minority
interests in our subsidiaries held by Sofinov and other shareholders.
Immediately prior to the closing of our offering as part of our reorganization,
these minority interests will be eliminated and Sofinov and these other
shareholders will be issued shares of our common stock.

                                       23
<PAGE>
    ACCUMULATED DEFICIT

    We have generated losses since our inception, and as of June 30, 2000, our
accumulated deficit was $12.2 million. We expect to make continued investments
in product design, development and manufacturing.

RESULT OF OPERATIONS

COMPARISON OF SIX MONTHS ENDED JUNE 30, 1999 AND JUNE 30, 2000.

    REVENUES

    Revenues for the six-month periods ended June 30, 1999 and 2000 were
$516,000 and $76,000, respectively. Revenues in the 1999 period were related to
the completion of certain ongoing research and development contracts and product
sales of a limited number of pre-production units. During the six months ended
June 30, 2000, no product shipments were made as we are in the process of
manufacturing our commercial units.

    COST OF SALES

    Cost of sales for the six-month periods ended June 30, 1999 and 2000 were
$507,000 and $0, respectively, as we did not have any product sales in the 2000
period.

    SELLING, GENERAL AND ADMINISTRATIVE EXPENSES

    Selling, general and administrative expenses for the six-month periods ended
June 30, 1999 and 2000 were $1.1 million and $1.7 million, respectively. The
increase in selling, general and administrative expenses during the 2000 period
resulted principally from additional administrative employees hired to support
our increased operations, higher legal expenses associated with recently
completed capital transactions and strategic relationships, and increased rent
and related costs from our new headquarters and manufacturing facility.

    RESEARCH AND DEVELOPMENT EXPENSES

    Research and development expenses for the six-month periods ended June 30,
1999 and 2000 were $736,000 and $746,000, respectively.

    INTEREST INCOME (EXPENSE), NET

    We incurred interest expense, net of $19,000 and $31,000 during the
six-month periods ended June 30, 1999 and 2000, respectively, as a result of net
borrowings from our shareholders.

    MINORITY INTEREST IN NET LOSSES OF SUBSIDIARIES

    Minority interests in net losses of subsidiaries were $349,000 and $261,000
for the six-month periods ended June 30, 1999 and 2000, respectively, reflecting
the minority shareholders' share of our net losses.

COMPARISON OF YEARS ENDED DECEMBER 31, 1997, 1998 AND 1999

    REVENUES

    Revenues were $278,000, $145,000, and $1.2 million in 1997, 1998 and 1999,
respectively. Revenues in 1997 consisted of the sale of prototype units and
research and development activities performed on behalf of other organizations.
In 1998, we completed the development and sale of our prototype units. The
majority of the increase in revenues in 1999 is attributable to the completion
of a substantial number of outstanding research and development contracts and
the initial sales of our pre-production units.

                                       24
<PAGE>
    COST OF SALES

    Cost of sales was $179,000, $192,000 and $1.1 million in 1997, 1998 and
1999, respectively. The increase in cost of sales in 1999 is attributable to
sales of our pre-production units.

    SELLING, GENERAL AND ADMINISTRATIVE EXPENSES

    Selling, general and administrative expenses were $1.9 million,
$1.8 million, and $2.2 million in 1997, 1998 and 1999, respectively. Selling,
general and administrative expenses in 1998 as compared to 1997 were relatively
flat. During 1997 and 1998, we focused on the refinement of our hydrogen
generators. The increase in selling, general and administrative expenses in 1999
resulted principally from our hiring of additional administrative employees and
the increased operations relating to our hydrogen fuel processor business.

    RESEARCH AND DEVELOPMENT EXPENSES

    Rearch and development expenses were $822,000, $1.3 million, and
$1.3 million in 1997, 1998 and 1999, respectively. During 1997 and 1998, we
focused on the development of our industrial on-site hydrogen generators. During
1999, we expanded our development efforts to also focus on our hydrogen fuel
processors for the fuel cell markets. Research and development expenses
increased from 1997 to 1998 principally due to increased expenses incurred under
two reimbursement research contracts with the Department of Energy. In 1999, our
research and development expenses were primarily due to $1.0 million of expense
representing the approximate value of services provided by Gaz de France to us.
These research and development contracts developed technologies consistent with
our core applications.

    INTEREST INCOME (EXPENSE), NET

    We earned interest income, net of $20,000 and $91,000 in 1997 and 1998,
respectively, as a result of the infusion of equity capital from one of our
shareholders in 1996. In 1999, we had interest expense, net of $30,000
associated with net borrowings provided by a shareholder.

    MINORITY INTEREST IN NET LOSSES OF SUBSIDIARIES

    Minority interest in net losses of subsidiaries was $763,000, $793,000 and
$487,000 in 1997, 1998 and 1999, respectively, representing the minority
shareholders' share of our net losses of our subsidiaries in those years.

LIQUIDITY AND CAPITAL RESOURCES

    Our capital requirements depend on numerous factors, including completion of
our product development activities, our ability to commercialize our hydrogen
fuel processors, market acceptance of our products and other factors. We expect
to devote substantial capital resources to continue our development programs
related to our products, to hire and train additional production staff, develop
and expand our manufacturing capacity, expand our sales and marketing activities
and begin commercial production of our fuel cell processors.

    We have historically financed our operations primarily from the sale of
common stock, and borrowings from shareholders that were subsequently converted
into our common stock, for an aggregate total proceeds of $13.1 million since
inception. During 1997, 58,000 shares of our common stock were sold to one
investor for $250,000. During 1998, 507,000 shares of our common stock were sold
to various investors for $950,000 and certain shareholders and others converted
$408,000 of their notes payable and $164,000 of accrued liabilities into 572,000
shares of our common stock. During 1999, 2,190,000 shares of common stock were
issued to various investors for cash consideration of $1.8 million. Also during
1999, certain shareholders and others converted $615,000 of notes payable,
including a $500,000 convertible note payable, and $674,000 of accrued
liabilities into 1,236,000 shares

                                       25
<PAGE>
of our common stock. During the six-month period ended June 30, 2000, 814,000
shares of our common stock were sold to various investors for $4.1 million and a
$31,000 loan to us was converted into 6,000 shares of our common stock.

    Our primary cash requirements have been to fund our research and development
efforts, capital expenditures and production costs. Net cash used in operating
activities was approximately $3.0 million, $2.4 million and $2.7 million for
1997, 1998 and 1999, respectively and $2.5 million for the six months ended
June 30, 2000. Net cash used in investing activities was $151,000, $15,000 and
$42,000 for 1997, 1998 and 1999, respectively, and $53,000 for the six months
ended June 30, 2000, and was primarily used for the purchase of property and
equipment.

    As of December 31, 1998 and 1999 and June 30, 2000, we had loans with
shareholders aggregating $162,000, $157,000 and $80,000, respectively, at an
interest rate of 10% per annum. As of December 31, 1998 and 1999 and June 30,
2000, the related accrued interest amounts to $43,000, $31,000 and $5,000,
respectively. The shareholders had the option to convert these loans into our
common stock at $1 per share and, as of August 28, 2000 all of these loans had
been repaid or converted into shares of our common stock.

    We intend to use the net proceeds of this offering for capital expenditures,
research and development, sales and marketing expenses, working capital and
general corporate purposes. We believe that our current cash balances and the
net proceeds from this offering, together with the proceeds of additional
investments by one of our shareholders immediately prior to this offering, will
provide us with sufficient capital to fund our operations for the next
24 months. There can be no assurance, however, that we will not require
additional financing to fund our operations and that, if required, any
additional financing will be available to us on acceptable terms.

MARKET RISK

    We currently have no significant floating rate indebtedness, hold no
derivative instruments and do not earn income denominated in foreign currencies.
Accordingly, changes in interest rates do not generally have a direct effect on
our financial position. However, to the extent that changes in interest rates
and currency exchange rates affect general economic conditions, we would be
effected by such changes. All of our revenues are recognized in dollars and
almost all of our revenues are from customers in the United States. Therefore,
we do not believe we have any significant direct foreign currency exchange risk
and do not hedge against foreign currency exchange rate changes.

NEW ACCOUNTING PRONOUNCEMENTS

    On March 31, 2000, the Financial Accounting Standards Board issued FASB
Interpretation No. 44, ACCOUNTING FOR CERTAIN TRANSACTIONS INVOLVING STOCK
COMPENSATION--AND INTERPRETATION OF APB OPINION NO. 25 (FIN 44). This
interpretation provides guidance for issues that have arisen in applying APB
Opinion No. 25, ACCOUNTING FOR STOCK ISSUED TO EMPLOYEES. FIN 44 applies
prospectively to new awards, exchanges of awards in a business combination,
modifications to outstanding awards and changes in grantee status that occur on
or after July 1, 2000, except for provisions related to repricings and the
definition of an employee which apply to awards issued December 15, 1998. The
provisions related to modifications to fixed stock option awards to a reload
feature are effective for awards modified after January 12, 2000. The new
interpretation is not expected to have a material impact upon our financial
statements.

                                       26
<PAGE>
                                    BUSINESS

OVERVIEW

    We are a leading designer and developer of hydrogen fuel processors for fuel
cell systems and industrial hydrogen generators. Our on-site hydrogen generators
can be used in numerous industrial manufacturing applications and at hydrogen
refueling stations for fuel cell vehicles. The efficient and cost-effective
production of hydrogen is critical to the commercial introduction of fuel cell
systems into the mass transportation and stationary markets. Our goal is to be
the leading provider of hydrogen fuel processors by capitalizing on our patented
UOB-TM- technology for hydrogen production. When compared to other currently
available methods of producing hydrogen, we believe that our technology is more
efficient, lower in emissions and lower in capital costs. Since 1993, we have
completed substantial field tests with industrial gas companies such as Gaz de
France and Air Liquide and have demonstrated our hydrogen processor for fuel
cell systems to leading fuel cell manufacturers such as Ballard Power Systems,
Plug Power, H Power and EnAble-TM-. We have also entered into contract
discussions with Hydrogenics to deliver commercial units for testing. We are in
discussions with ZeTek Power and others for the development of products that
will meet their specific needs. We delivered our first commercial industrial
hydrogen generation systems in 1997 and expect to deliver our first commercial
fuel processors for fuel cell systems by the end of 2000.

    We believe that significant demand for fuel cells is being driven largely by
the increasing demand for electricity, particularly high quality and more
reliable electric power, deregulation of the electric power industry, and
increasing environmental concerns and regulation regarding conventional power
technologies. Market applications for fuel cells include systems used for
transportation applications and systems used to power residences, industrial and
commercial facilities, devices in remote locations and certain military
applications.

    In the stationary fuel cell market, we are designing our initial products
for residential and small commercial market applications. In the transportation
market, we are developing on-board hydrogen processors for fuel cell vehicles
and other transportation market applications. In addition, we are developing
hydrogen generation systems that can be used at hydrogen refueling stations to
fuel municipal bus systems and other fleet vehicles. For example, as a
participant in a California Fuel Cell Project program, we have installed a
large-scale hydrogen generation system at the SunLine Transit Agency to fuel
buses powered by XCELLSIS The Fuel Cell Engine Company, an alliance among
DaimlerChrysler, Ford Motor Company and Ballard Power Systems.

    Our industrial on-site hydrogen generators, which we believe eliminate or
greatly reduce the cost, transportation and storage problems associated with
bulk-delivered hydrogen, have immediate commercial applications in numerous
industrial manufacturing markets, such as: metals, for heat treating and iron
reduction processes; electronics, for manufacturing integrated circuits and
semiconductors; and glass, for float glass production and manufacturing fiber
optics and automotive windshields.

MARKET OPPORTUNITIES FOR OUR PRODUCTS

    IMPORTANCE OF HYDROGEN FUEL PROCESSORS TO FUEL CELL SYSTEMS

    A fuel cell is an electrochemical device that produces electricity from
hydrogen without combustion, with water and heat as the only by-products. Fuel
cell systems have several advantages over conventional power generation systems,
including lower emissions, higher fuel efficiency, quieter operation, lower
vibration and potentially lower maintenance and capital costs. These advantages
enable fuel cells to offer cleaner and more efficient alternatives to existing
power sources. The predominant types of fuel cells include alkaline fuel cells,
phosphoric acid fuel cells, molten carbonate fuel cells, solid oxide fuel cells,
or SOFCs, and proton exchange membrane, or PEM, fuel cells. These fuel cell
types have different operating characteristics and market applications. We are
developing fuel processors for PEM fuel cells and SOFCs.

                                       27
<PAGE>
    There are three major components to a fuel cell system: the fuel processor,
the fuel cell stack and the power conditioning equipment. Certain fuel cell
manufacturers and fuel processor companies are finding it difficult to generate
hydrogen efficiently and in a scaled-down fashion suitable for broad commercial
market applications. Moreover, the cost of the fuel processor represents
approximately 40% of the cost of all of the components of an entire fuel cell
system. Accordingly, any significant cost reductions that are achieved by
manufacturers of fuel processors, such as our company, could provide meaningful
cost reductions in the completed fuel cell system. Such overall price reductions
should greatly assist a fuel cell manufacturer's ability to achieve market
penetration in what is likely to be a cost-competitive environment. The major
components of a fuel cell system and the cost breakdown are described below:

    [DIAGRAM OF FUEL CELL SYSTEM AND PIE CHART OF THE COST BREAKDOWN OF THE
COMPONENTS OF A FUEL CELL.]

    Because a fuel cell system requires hydrogen in order to produce
electricity, a reliable source of hydrogen is critical to fuel cell
manufacturers and end-users. There is no established commercial hydrogen
delivery infrastructure for the transportation market, which we believe may
eventually prove to be the largest commercial market for fuel cells.
Furthermore, liquid hydrogen, one possible source of hydrogen that is currently
available, must be stored at extremely low temperatures, resulting in a
competitive disadvantage due to the high costs associated with such storage
requirements. By contrast, our hydrogen processing systems deliver hydrogen on
demand, at the required point of use and at the desired level of purity.
Therefore, we believe that hydrogen processors such as ours are an essential
component of fuel cell systems.

    FUEL CELL MARKETS

    We believe that a number of trends are focusing attention on the use of fuel
cells as an attractive alternative solution for power generation. As a result,
automotive companies, fuel cell developers, component suppliers and power
suppliers are investing substantially increasing amounts of capital in the
development of fuel cell systems, many of which incorporate fuel processors.

    Trends that will influence the penetration of fuel cells into broad
commercial markets include:

    - Increasing demand for electricity, particularly for continuous and
      reliable power, which is partially attributable to the proliferation of
      computers, the Internet, communication networks and advanced electronic
      devices;

    - Deregulation in the energy industry, which is likely to expand the market
      for alternative power technologies;

    - Operational efficiencies and other advantages of fuel cells over
      traditional power technologies; and

    - Environmental concerns regarding conventional power technologies,
      including combustion-based power generation.

    STATIONARY FUEL CELL MARKET.  Worldwide demand for electricity, particularly
for higher quality power, with smaller variations in voltage and current, and
more reliable power, with fewer interruptions, has been increasing rapidly in
recent years. This rapid increase is partially attributable to the proliferation
of computers, the Internet, communications networks and advanced electronics.
According to a 2000 issue of THE HUBER-MILLS DIGITAL POWER REPORT, electricity
accounted for approximately 25% of U.S. energy consumption in the mid 1970's,
accounts for approximately 37% of U.S. energy consumption today, and will
account for more than half of U.S. energy consumption early in the twenty-first
century. Traditional methods of delivering electric power are proving to be
inadequate. Grid power worldwide is regularly unreliable or inadequate and is
simply unavailable in many locations throughout the world. The Electric Power
Research Institute estimated that electric power reliability problems cost the
U.S. more than $50 billion annually. Fuel cells represent a cost-

                                       28
<PAGE>
effective and efficient alternative to meeting this increasing demand for
electricity and high quality power.

    Moreover, increasing environmental concerns and deregulation in the electric
power industry in North America and elsewhere are also creating demand for
alternative power generation technologies such as fuel cells. Furthermore, power
suppliers and other energy providers are looking to implement decentralized or
distributed power generating solutions in order to avoid the high capital costs
of expanding and maintaining power transmission and distribution systems. Power
producers are also searching for methods to manage energy supply and demand more
efficiently by supplying power strategically to where it is used.

    TRANSPORTATION FUEL CELL MARKET.  In the transportation market, the United
States federal government, California and several other states (principally New
York, Massachusetts and Maine) have adopted or proposed laws and regulations
establishing vehicle emission standards and requirements for the sale,
commencing as early as 2003, of low, ultra-low, super ultra-low and zero
emission vehicles. Certain regulations adopted by these states provide that a
significant percentage of the new vehicles sold in these states must meet
certain "zero emission" guidelines by 2003. Using currently available
technology, we believe that fuel cell powered vehicles are the best choice to
meet the performance requirements of consumers and the regulatory requirements
for such low emission vehicles and will provide competitive advantages over
battery powered and hybrid vehicles.

    While environmental considerations provided the initial impetus for
automobile manufacturers to seek alternatives to the use of the internal
combustion engine, we believe that automobile manufacturers are beginning to
recognize that fuel cells offer an opportunity to deliver power that is more
attractive to a large segment of automobile consumers. Fuel cell powered
vehicles can provide consumers with higher fuel efficiency, lower noise and
vibration, enhanced passenger comfort and performance and new vehicle design
options and have the potential to provide a lower purchase price and maintenance
costs. As a result, automotive manufacturers are committing substantial
resources towards the development of fuel cell powered vehicles. In addition to
power generation for automobiles, there are other transportation market
applications for our fuel processors such as auxiliary power generation, rail
transport, bus, truck and heavy equipment applications.

    INDUSTRIAL HYDROGEN MARKET

    Hydrogen is a critical component in many manufacturing processes. According
to a 1998 report by SRI Consulting, an industrial consulting firm, demand for
hydrogen has been the fastest growing among industrial gases during the past
five years. SRI Consulting estimates that the demand for delivered hydrogen will
grow at an average annual rate of approximately 10 to 11% through 2001.

    Hydrogen users range from oil refiners and ammonia manufacturers, which use
very large volumes, to microelectronics manufacturers, metals manufacturers and
scientific laboratories, which use relatively small volumes on an industrial
scale. Larger users usually produce their own hydrogen on-site using large-scale
steam methane reformers. Small- and medium-volume users, whose requirements do
not support the cost of steam methane reformers, have traditionally purchased
their hydrogen from industrial gas suppliers and distributors who deliver the
hydrogen by truck, with the hydrogen then stored in tanks, tubes or cylinders at
the user's site.

    While bulk-delivered hydrogen is widespread, it is the most expensive way to
obtain hydrogen due to the high cost of packaging and delivery. The
inefficiencies of bulk-delivered hydrogen are reflected in the fact that the
compressed hydrogen gas cylinder weighs approximately 125 pounds but only
contains about 250 cubic feet of hydrogen gas that weighs just over one pound.
In addition to the high cost associated with cylinder-packaged hydrogen, there
are numerous safety concerns relating to current technology for over the road
delivery and storage of flammable hydrogen gas.

    These cost and safety concerns are not unique to hydrogen. The industrial
gas industry has already implemented on-site gas generation technologies for
nitrogen and oxygen as a way of reducing cost and

                                       29
<PAGE>
safety concerns for small- and medium-volume users of these gases. However,
economical on-site hydrogen production has generally not been available for all
but the largest volume users. Our hydrogen generators are a completely
integrated unit that we believe will, both in the near term and for the
foreseeable future, offer an attractive on-site hydrogen generation solution by
providing:

    - Cost advantages due to eliminating delivery, transfer and storage
      expenses;

    - Increased safety by reducing the amount of potentially hazardous hydrogen
      inventory stored at an end-user location; and

    - More consistent hydrogen purity, due to eliminating the need to connect
      and disconnect cylinders that contain hydrogen of varying levels of
      purity, with the flexibility to adjust purity to the user's desired level.

OUR STRATEGIC RELATIONSHIPS

    We intend to leverage our strategic alliances with Engelhard and Gaz de
France and our expected alliance with Visteon in order to expand our research
and development, increase marketing and distribution channels for our products,
and enhance our production and manufacturing capabilities.

    RELATIONSHIP WITH ENGELHARD

    Effective January 19, 1999, we entered into an agreement with Engelhard, the
world's largest catalyst supplier, to develop and commercialize a hydrogen fuel
processing system by combining Engelhard's proprietary catalyst technology with
our proprietary fuel processor-related technology, specifically for residential
and small stationary fuel cell systems applications. This joint development
agreement also contemplates further development activities between our
companies.

    We and Engelhard have royalty-free access to each other's patents and
technology for products produced prior to the end of 2001. All patents and
technology jointly developed will be jointly owned and both parties have an
exclusive right to use the jointly owned patents and technology through the end
of 2004. Either party may terminate this agreement upon 90 days' notice, in
which case the rights to jointly owned patents and technology will not be
exclusive and we must negotiate a royalty-based license for each other's solely
owned patents and technology.

    RELATIONSHIP WITH GAZ DE FRANCE

    On July 13, 2000, we entered into a five-year agreement with one of the
leading natural gas suppliers and distributors in the world, Gaz de France,
under which Gaz de France became the exclusive distributor of our hydrogen
generating systems for industrial use and refueling stations in the European
Union, Norway and Switzerland. This distribution agreement includes an annual
take-or-pay requirement equal to one-half of the agreed upon minimum purchase
quota. In 2001, we expect that Gaz de France will purchase a minimum of eight
units of our industrial hydrogen generation systems. The minimum purchase quota
and take-or-pay requirement are determined annually based on our projected
number of sales and are subject to adjustment, up or down, if our actual sales
in the U.S. differ from projected sales. If Gaz de France fails to meet its
annual take-or-pay requirement, we may terminate this agreement upon giving Gaz
de France an additional 12 months to fulfill this requirement. In addition, we
plan to develop enhanced hydrogen generation systems and conduct related
research together with Gaz de France. Assuming the exercise of the warrant
issued under the distribution agreement, a wholly owned subsidiary of Gaz de
France will own approximately   % of our common stock, after giving effect to
the offering.

    RELATIONSHIP WITH VISTEON

    On June 20, 2000, we entered into a letter of intent for an exclusive
engineering, manufacturing and development alliance with Visteon Corporation
with respect to the development and manufacture of our hydrogen fuel processors
for fuel cell systems. Visteon is the world's second largest supplier of
automotive systems, modules and components to global vehicle manufacturers.
Based on our letter of

                                       30
<PAGE>
intent, we intend to enter into an engineering services agreement with Visteon
pursuant to which Visteon has commenced to provide and will continue to provide
us over the three year term of the agreement, with:

    - its system engineering expertise to develop our own core competency to
      implement design and manufacturing systems processors;

    - engineering design and support services to establish one of our current
      facilities as a prototyping facility for the development, testing and
      design of our hydrogen fuel cell processors, with the capability of
      manufacturing approximately 2,000 units per year and potentially up to
      5,000 units per year; and

    - advice and training regarding the required infrastructure and processes
      necessary for supporting business functions to operate the facility,
      including recruitment and training of technical personnel, supplier
      development and fault reporting and containment.

    In exchange for these engineering services, we will issue 10,691,350 shares
of our common stock. In addition to the engineering services agreement, we will
enter into a separate joint development agreement with Visteon to develop, own
and exploit jointly the proprietary design and manufacturing technology and
know-how related to our hydrogen fuel cell processors and, pursuant to a
separate contract manufacturing agreement, Visteon will build or dedicate a
Visteon manufacturing plant to manufacture, on a contract basis, substantially
all commercial production units of our hydrogen fuel processors for fuel cell
systems. We believe that our relationship with Visteon will significantly
accelerate our efforts to achieve large-scale commercial production of our
hydrogen fuel processors for fuel cell systems and produce higher quality and
more cost-efficient products.

    As a result of the 10,691,350 shares of our common stock being issued to
Visteon pursuant to the engineering services agreement and Visteon's previous
purchase of 400,000 shares of our common stock in June of 2000, Visteon will own
approximately   % of our common stock after giving effect to the offering.

OUR STRATEGY

    Our goal is to be the world's leading developer and producer of hydrogen
fuel processors used in fuel cell systems and on-site hydrogen generators used
in industrial applications. Therefore, in the pursuit of this market, we are
working to develop fuel cell related products that will meet the demands of
industry and our customers. By utilizing our intellectual property, we intend to
be able to address a variety of near and long-term markets. We seek to provide
fuel-flexible, cost-effective, environmentally friendly and highly efficient
products as an enabling technology to fuel cell markets. By providing the best
combination of performance and price, we aim to be the fuel processor supplier
of choice for fuel cell manufacturers. To achieve our objectives, we have
implemented the following strategies:

    DESIGN AND DEVELOP SUPERIOR PRODUCTS FOR FUEL CELL MARKETS.  Our technology
and products have the potential to be utilized in multiple applications across
several different industries. We are designing and developing proprietary
hydrogen processors for PEM fuel cell systems that will be used to power
vehicles, residences, industrial and commercial facilities, devices at remote
locations and certain military applications. In addition, we are also developing
a SOFC fuel processor. Because of the higher heat by-product, SOFCs can be used
for residential and other stationary applications and may prove to be a superior
technology for these markets in the future.

    CAPITALIZE ON IMMEDIATE COMMERCIAL MARKETS FOR ON-SITE HYDROGEN GENERATION
SYSTEMS.  We believe that our hydrogen generation systems significantly reduce
the cost, logistical, safety and regulatory problems associated with
bulk-delivered hydrogen and have immediate applications in numerous industrial
manufacturing markets such as metals for heat treating and iron reduction
processes and electronics for manufacturing integrated circuits and
semiconductors. We commenced delivery of commercial on-site hydrogen generation
systems in 1997. Sales of these systems should also help to support our
development efforts of hydrogen processors for fuel cells.

                                       31
<PAGE>
    BUILD ON RELATIONSHIPS WITH FUEL CELL MANUFACTURERS.  We have existing
commercial relationships with Ballard Power Systems, Plug Power, H Power,
EnAble-TM- and other leading fuel cell manufacturers. We intend to be the
provider of choice of hydrogen fuel processors to all of the leading fuel cell
system manufacturers. Furthermore, we seek to continue to expand our
relationships with other fuel cell system manufacturers to reach new areas of
application, such as cable and telecommunications, recreational and marine
vehicles and military applications.

    BENEFIT FROM STRATEGIC ALLIANCES AND SEEK NEW PARTNERS.  We believe that our
strategic alliances with Gaz de France and Engelhard, our anticipated alliance
with Visteon, and other potential alliances will aid us in achieving our goal of
becoming the world's leading producer of hydrogen processors for fuel cell
systems and on-site hydrogen generation systems. We will continue to seek out
additional strategic arrangements in order to enhance research and development,
expand our marketing and distribution channels and ensure high quality
manufacturing and service on an international level.

    CONTINUE TO REDUCE COSTS.  We plan to continue to focus on reducing costs of
our fuel processors and hydrogen generators by efficiently combining our
patented technology with existing commercial technologies. We plan to improve
product performance and reduce production costs through the implementation of
new technologies, such as microprocessor controllers, advanced catalysts and
miniaturized components. We also expect significant labor efficiencies as
economies of scale in production are achieved. Moreover, we believe that our
expected relationship with Visteon will allow us to reduce production costs
significantly and achieve rapid commercialization of our products with reduced
risk.

    MAINTAIN TECHNOLOGICAL LEADERSHIP.  We are continuing and expanding our
research and development of hydrogen processing technology to establish and
maintain our technological leadership in our target markets, improve existing
products and position us to develop technologies and products for other market
applications. We have patents pending and patents in preparation that will
protect our intellectual property. We will also aggressively protect our trade
secrets.

    ACQUIRE AND LICENSE COMPLEMENTARY TECHNOLOGIES.  We intend to evaluate
acquiring and licensing complementary technologies that can potentially
accelerate our development and market penetration of our products.

    CONTINUE TO DEVELOP STRONG RELATIONSHIPS WITH GOVERNMENT AND OTHER
NON-PROFIT ORGANIZATIONS. We have relationships with various state and federal
governmental agencies and are also involved in several hydrogen and
environmentally conscious organizations. We believe that these relationships
will contribute to widespread acceptance of our technology in our target
markets. For example, we believe that our relationship with the United States
Department of Energy, our involvement in the California Air Resources Board's
Innovative Clean Air Technologies Program, and our participation in a California
Fuel Cell Project program provide invaluable field test experience of our
designs and will lead to other types of state and federal contracts involving
hydrogen generation. These programs are undertaken only in areas of synergy to
complement and leverage our path to commercial production.

OUR COMPETITIVE ADVANTAGES

    We believe that the following competitive advantages have established us as
a leader in the design and development of hydrogen fuel processors used in fuel
cell systems as well as on-site hydrogen generators:

    TECHNOLOGY LEADER.  Our customer base has recognized us as a leading
designer of hydrogen processors for fuel cell systems and on-site hydrogen
generation systems. We believe that, in comparison to other currently available
methods of producing hydrogen, our patented UOB-TM- technology for hydrogen
generation provides higher efficiency, lower emissions, decreased capital costs,
and increased safety and reliability, while affording greater fuel flexibility.
In addition, our products utilize a fast and efficient preheating process and
can be scaled to operate in a variety of applications.

                                       32
<PAGE>
We provide our customers with a complete, packaged subsystem that has integrated
controls in order to meet their commercial needs and we plan to continue to make
improvements upon our existing designs in order to make our products more
attractive to a broader spectrum of customers.

    FUEL-FLEXIBLE PRODUCTS.  Our products can utilize a broad range of readily
available fuels, including natural gas, propane, gasoline, diesel and other
hydrocarbons. We believe that we are one of the few companies to offer such a
fuel-flexible solution, thereby allowing our technology to be used in a greater
variety of applications than that of our competitors.

    SUCCESSFUL FIELD TESTING AND PRODUCT DEMONSTRATIONS.  Since 1993, we have
logged over 30,000 hours of operations with our on-site hydrogen generation
systems. We have demonstrated our hydrogen processor for fuel cell systems to
leading fuel cell manufacturers such as Ballard Power Systems, Plug Power,
H Power and EnAble-TM-. Given that both our on-site hydrogen generation systems
and our hydrogen processors for fuel cells employ our patented UOB-TM-
technology, this extensive experience from field testing and product
demonstrations positions us as one of the more experienced designers of hydrogen
processors. We have been selected as one of two participants in a California
Fuel Cell Project program, where we have installed a large-scale hydrogen
generation system at the SunLine Transit Agency that will be used as a hydrogen
refueling station for buses powered by XCELLSIS The Fuel Cell Engine Company, an
alliance among DaimlerChrysler, Ford Motor Company and Ballard Power Systems.

    KEY ALLIANCE PARTNERS.  We believe that our strategic partnerships will
provide us with significant competitive advantages. Our relationships with Gaz
de France and others provide access to major distribution channels as well as
critical input relating to technological advancements of our products. Our
relationship with Engelhard provides us a joint development partner with the
most widely accepted catalysts, which are a key component of fuel cell systems.
In addition, we believe that our relationship with Visteon will significantly
accelerate our efforts to achieve large-scale production of our hydrogen fuel
processors for fuel cell systems.

    INTELLECTUAL PROPERTY.  We have either obtained or filed patents covering
many of the technological advancements that make our UOB-TM- technology unique.
These advancements include the burner, the mixing injectors, combustion chamber
configurations, the internal preheat heat exchanger arrangements, and advanced
shift reactor designs. We currently hold ten U.S. patents and numerous foreign
patents. We have also filed for six additional patents in the United States.
Moreover, we have also applied to protect our patents outside of the United
States to cover advancements for which we have already obtained patents in the
United States or for which we have filed for patents in the United States.

    STRONG MANAGEMENT TEAM.  We believe that we have a strong management team
with the vision, experience and skills necessary to enable us to achieve our
objectives. Our founder, Chairman, President and Chief Executive Officer, David
Moard, has considerable experience in research, development, manufacturing and
operations in energy-related companies. Our co-founder and a contributing member
of our scientific advisory panel for research and development, Leonard Greiner,
is an internationally recognized expert in fuels and propellants with more than
thirty years of experience in a wide variety of energy-related fields. In
addition to the experience of our executive officers, our engineering and
manufacturing employees have 120 years and 250 years, respectively, of combined
industry experience as a group.

OUR PRODUCTS AND CUSTOMERS

    Our products provide an efficient and cost-effective way to generate
hydrogen. Our UOB-TM- technology allows for hydrogen gas generation using
readily available inputs such as electricity, natural gas, and water.

                                       33
<PAGE>
    HYDROGEN PROCESSORS FOR FUEL CELL MARKETS

    We are currently focused on three primary fuel cell product lines:

    - Stationary fuel processing products for residential and commercial fuel
      cell systems;

    - On-board fuel processors for transportation fuel cell applications; and

    - Hydrogen generation systems for refueling stations for bus systems and
      other fleet vehicles.

    The following table sets forth our products for the fuel cell markets and
describes their respective applications, target markets and development status:

<TABLE>
<CAPTION>
        PRODUCT                APPLICATION            TARGET MARKET               STATUS
<C>                       <S>                     <C>                     <C>

                          Fuel cell power system  Residential and         - Commercial units in
    STATIONARY FUEL       using existing fuel     commercial buildings;     production
       PROCESSOR          delivery                remote locations and
    (Less than 25kw)      infrastructures (e.g.,  military
                          natural gas, propane)

ON-BOARD FUEL PROCESSOR   Transportation fuel     Transportation          - Prototypes in
      (50-100 kw)         cell systems (on-board                            development for
          and             or stand-by power)                                multiple fuel types,
 (2.5kw auxiliary power                                                     including diesel
         unit)                                                            - Sacramento Municipal
                                                                            Utility District bus
                                                                            program being
                                                                            conducted

                          Hydrogen refueling      Transportation          - Unit installed at
                          station. Utilizes                                 SunLine Transit
   REFUELING STATION      natural gas feedstock                             Agency
       4200 SCFH          to produce hydrogen
                          for fuel cell
                          transport market.
</TABLE>

    We have development and purchase contracts with several of the leading
manufacturers of fuel cells and with other power suppliers, which contracts
provide for delivery of commercial models of our hydrogen processor for fuel
cells for testing prior to delivery of production quantities. For example,
Ballard Power Systems, EnAble-TM-, Plug Power and H Power are each testing one
of our fuel processors. In addition, EnAble-TM- has a follow-on purchase
commitment for an additional four units. We are scheduled to begin delivery of
these additional commercial units by the end of 2000. We have also entered into
contract negotiations with Hydrogenics for delivery of fuel processors for
testing. We are in discussions with ZeTek Power and others for the development
of products that will meet their specific needs. In addition, SunLine Transit
Agency, FIBA Technologies, Inc. and Ballard Power Systems have formed a venture
to operate hydrogen-based fuel cell systems on a municipal bus system in Palm
Desert, California and we believe that our currently installed 4200 SCFH system
will form the core of their hydrogen refueling station.

                                       34
<PAGE>
    INDUSTRIAL HYDROGEN GENERATION SYSTEMS

    We are currently focused on three primary industrial hydrogen generation
product lines:

    - 600 standard cubic feet per hour (SCFH) hydrogen generation product for
      commercial applications as an alternative to bulk-delivered hydrogen;

    - 4,200 standard cubic feet per hour (SCFH) hydrogen generation product for
      larger-scale industrial applications as an alternative to bulk-delivered
      hydrogen; and

    - 15,000 standard cubic feet per hour (SCFH) hydrogen generation product for
      very large industrial facilities requiring on-site hydrogen generation.

    The following table sets forth our products for industrial hydrogen
generation and describes their respective target markets and development status:

<TABLE>
<CAPTION>
       PRODUCT                      TARGET MARKET                               STATUS
<S>                     <C>                                     <C>
600 SCFH                Semiconductor, microelectronics,        - Commercial units delivered; over
                        scientific laboratories, power plant    10,000 hours of in-field service
                        cooling, specialty gas
4200 SCFH               Glass, hydrogenation, oil recycling,    - Commercial units delivered; over
                        tertiary oil recovery, metals, primary  1,000 hours of commercial operating
                        steel reduction, heat treating            experience
15000 SCFH and larger   Very large industrial facilities,       - In development
                        requiring on-site hydrogen generation
                        such as metals, chemicals and
                        petrochemicals
</TABLE>

    We are in discussions with Air Products and Chemicals, Inc., AGA of Sweden,
and Air Liquide for the sale of our on-site hydrogen generation systems. In
addition, Gaz de France is currently testing our 4200 SCFH unit as part of our
exclusive European distribution arrangement for industrial hydrogen generation
systems

    We continue to seek additional applications for our products in various
markets. For example, we are currently under contract with the South Coast Air
Quality Management District in California in order to determine the efficiency
of our on-site hydrogen generators to produce hydrogen from "simulated" landfill
gas. In connection with this program, we have entered into a memorandum of
understanding with DTE Biomass Energy, a wholly-owned subsidiary of DTE Energy,
a large electrical utility, in order to investigate the feasibility and economic
viability of reforming landfill gas to produce hydrogen for sale as either a
chemical or a fuel. DTE Biomass Energy is considering a demonstration program
that will utilize one of our units at a landfill at which DTE Biomass Energy has
the gas rights. If such a product is technically successful and economically
viable, the potential for a significant new market may exist for us.

                                       35
<PAGE>
MILESTONES

    HYDROGEN PROCESSORS FOR FUEL CELL SYSTEMS

    To date, we have achieved the following major milestones in the development
and commercialization of our hydrogen processor for fuel cells:

<TABLE>
<CAPTION>
YEAR                    MILESTONE
----                    ---------
<C>                     <S>
        1995            - Completed successful preliminary UOB-TM- fuel processor
                            evaluation with one of the leading U.S.-based
                            multinational oil companies.

        1996            - Delivered a small transportation prototype using UOB-TM-
                            design to operate on liquid fuels, such as diesel and
                            gasoline, to Aerojet and the Department of Defense.

        1997            - Prepared preliminary design for the advanced Fuel Flexible
                            Fuel Processor (F(3)P) for automobiles as a prime
                            contractor to the Department of Energy in cooperation
                            with the Partnership for New Generation Vehicles.

        1998            - Completed design and manufacture of the F(3)P.

                        - Completed the design of our 50kw fuel processor under a
                            contract with the Department of Energy in cooperation
                            with the Partnership for New Generation Vehicles.

                        - Successfully designed and delivered to H Power a
                            multi-fuel prototype fuel processor.

        1999            - Entered into our strategic alliance with Engelhard for the
                            joint development of fuel processor subsystems.

                        - Delivered initial evaluation residential unit to customer
                            with satisfactory results.

        2000            - Entered into a letter of intent for a strategic alliance
                            with Visteon for contract manufacturing and services.
</TABLE>

    INDUSTRIAL HYDROGEN GENERATION SYSTEMS

    To date, we have achieved the following major milestones in the development
and commercialization of our industrial hydrogen generation systems:

<TABLE>
<CAPTION>
YEAR                    MILESTONE
----                    ---------
<C>                     <S>
        1993            - Delivered prototype hydrogen generator under contract with
                            Southern California Gas Company for use by the
                            California Polytechnic University Pomona.

        1995            - Demonstrated UOB-TM- and hydrogen generation system for
                            the electronics industries with Teledyne Brown
                            Engineering and Bend Research at their research center.

        1996            - Fabricated and delivered a complete industrial on-site
                            hydrogen generation system for initial field tests.

                        - Began UOB-TM- hydrogen generation system product sales to
                            BOC Gases and MG Industries for on-site applications.

                        - Demonstrated UOB-TM- fuel flexibility by using propane as
                            a feedstock for on-site hydrogen generation.

        1997            - Shipped our first commercial units to BOC, Air Products
                            and American Air Gas.

        2000            - Achieved 10,000 hours of in-field commercial operation for
                            one of our 600 SCFH units.

                        - Entered into our strategic alliance with Gaz de France for
                            distribution of our industrial hydrogen generators in
                            Europe.
</TABLE>

                                       36
<PAGE>
OUR TECHNOLOGY

    THE UNDER-OXIDIZED BURNER--UOB-TM-

    The heart of our fuel processors for fuel cells and on-site hydrogen
generating systems is the UOB-TM-. Through a unique patented burner design and a
reactor vessel configuration, we are able to reform hydrocarbon feedstock into
the basic chemical constituents of hydrogen, carbon monoxide, carbon dioxide,
and water vapor. In comparison to other available methods for producing
hydrogen, our technology:

    - is more cost-effective;

    - integrates well with fuel cell systems;

    - is more energy efficient than electrolysis and steam methane reforming;

    - quickly produces a reliable flow of hydrogen gas to the user;

    - maximizes the production of hydrogen at the desired purity level; and

    - provides scalability for a variety of commercial applications.

    The UOB-TM- is fed a hydrocarbon feedstock (typically, natural gas), an
oxidant (typically, air), and steam. The UOB-TM- process first preheats these
gases, which are then mixed and ignited, allowing the product to reach
equilibrium compositions of hydrogen and carbon monoxide. As the exhaust gases
travel through the UOB-TM-, they pass through an internal heat transfer
compartment, which lowers the gas temperature, but more importantly, raises the
inlet air and fuel gas temperatures. This unique internal heat recovery system
helps reduce the capital cost by minimizing the number of containment vessels
that are needed to produce the desired hydrogen. By controlling the air-to-gas
ratio, steam-to-gas ratio and the pre-combustion mixing of air and feedstocks, a
partial oxidation reaction takes place. A fraction of the feedstock is combusted
to generate the heat necessary to process the remaining fuel into hydrogen and a
relatively small portion of other gases. The UOB-TM- process includes either a
non-catalyzed partial oxidation process or a catalyzed autothermal reform
process. The UOB-TM- combustion process takes place at temperatures as high as
2800 DEG.F. This temperature leads to a very thorough reaction of the
feedstocks, resulting in conversion efficiencies over 97%, with little
non-reacted fuel. The output of the UOB-TM- combustion process is a mixed gas
stream that consists of hydrogen, nitrogen, carbon monoxide, carbon dioxide,
water vapor and trace gases, such as argon, which are then further processed
based upon the specific application.

    OUR FUEL PROCESSORS FOR FUEL CELLS

    Our fuel processor for fuel cell applications utilizes our UOB-TM-
technology to convert fuels into a hydrogen rich mixed gas stream, which is fed
directly to the fuel cell to generate electricity. Our fuel processors integrate
a number of chemical processes in order to produce the required hydrogen-rich
gas. In addition to the key process of producing hydrogen from the hydrocarbon
fuel, our fuel processors also perform a variety of other important functions,
including reducing the temperature, carbon monoxide levels and contaminants in
the product gas in order to satisfy the stringent requirements for successful
operation of a PEM fuel cell. Strict control of the entire process is also
necessary in order to ensure that the proper composition of hydrogen-rich gas is
produced. To accomplish this, we employ advanced control software and systems.
The following is a diagram of our fuel processor for fuel cells.

[DIAGRAM OF FUEL CELL SYSTEM.]

    We are also developing an SOFC fuel processor. The SOFC differs from the PEM
fuel cell in that it is better suited for continuous operation applications, has
a longer life, lower cost of materials, has a 25% higher electrical efficiency
and requires no catalysts. Because of the higher heat by-product, SOFC systems
are primarily for residential and other stationary uses, and may prove to be an
excellent

                                       37
<PAGE>
technology for applications involving co-generation of power. The SOFC is an
efficient fuel cell for such markets because, in addition to producing
electricity, the heat by-product of the SOFC can also be used to drive cooling
and heating appliances, including steam generation to heat air and water in such
applications. We are committed to developing fuel processing technologies for a
variety of fuel cell systems, including SOFCs, in order to meet the varied
demands of different types of fuel cells.

    OUR INDUSTRIAL HYDROGEN GENERATION SYSTEMS

    Our patented UOB-TM- technology is used in our industrial hydrogen
generation systems to convert hydrocarbon feedstocks into pure hydrogen gas and
other basic chemical components. Our industrial hydrogen generation systems use
hydrocarbon feedstocks, such as natural gas, that are readily available through
existing infrastructures. Due to its relatively simple design and low capital
costs, we believe that our UOB-TM- technology is a superior alternative to other
on-site production and distribution methods of supply for hydrogen, by providing
the customer the ability to produce hydrogen on-site and as required. The
following is a diagram of our UOB-TM- technology:

[DIAGRAM OF OUR UOB-TM- TECHNOLOGY.]

    Our industrial hydrogen generation system first converts hydrocarbon fuel
into a mixed gas stream. The mixed gas stream then enters the purification
process and produces the desired purity level up to 99.9999% quality hydrogen.
Our industrial hydrogen generation systems are created as modular units that are
mounted on metal skids so that the system can easily be installed outside of an
industrial facility at minimum cost. Electricity is used to compress process
feedstock (fuel, air, and water) to provide for hydrogen product gas at the
customer's normal supply pressure. We use industrial instrumentation and
controls to provide durability and reliability. Simplified equipment
integration, packaging and assembly is achieved through the use of a separate
coded vessel. Our system purifies the hydrogen using an advanced pressure swing
adsorption process (PSA). We have implemented an automatic controller that
provides safe operation with remote diagnostics and monitoring, in order to
maximize system reliability and enhance our field support of customer needs.

MANUFACTURING AND FACILITIES

    Our current research and development facility includes 15,259 square feet of
office, manufacturing and test facilities. We have recently acquired a 55,000
square foot manufacturing facility, which should meet our near-term production
needs.

    We are in the process of expanding our manufacturing capacity in order to
meet the needs of our expanding operations and the commercialization of our
products. In addition, pursuant to our letter of intent with Visteon, Visteon
has agreed in principle to be our contract manufacturer for hydrogen processors
for fuel cell applications in order to satisfy larger volume sales demand that
cannot be met by our existing manufacturing capacity. It is anticipated that
small production runs of custom or low volume products may continue to be
produced at our current manufacturing facility. Moreover, the letter of intent
provides that the parties will have the option to jointly establish an
additional manufacturing facility outside of the United States to supplement
Visteon's production capacity.

    The manufacturing capacity of our present facility is adequate for our
near-term projected industrial hydrogen generation system sales. As the market
for our industrial gas products grows, we will need to further expand our
production facilities. We are currently exploring options such as joint
manufacturing agreements, outsourcing and the acquisition or lease of existing
acceptable manufacturing facilities, to achieve commercialization on a timely
basis while minimizing cost.

                                       38
<PAGE>
SALES AND MARKETING

    STATIONARY FUEL CELL MARKETS

    We plan to sell our hydrogen processors for fuel cell systems through our
internal sales force to original equipment manufacturers and fuel cell
manufacturers. Our latest generation of fuel processing products will serve as
the foundation for future commercial units through a steady progression in
performance, size, operability and customization of stationary fuel cell
systems.

    TRANSPORTATION FUEL CELL MARKETS

    We plan to sell our hydrogen processors to the automotive manufacturing
industry, other segments of the transportation industry and fuel cell
manufacturers through our internal sales force. Lightweight, durable,
liquid-fueled hydrogen processors must be developed to meet the future demands
of fuel cell vehicle manufacturers. By capitalizing on our experience in
stationary fuel processing systems, we plan to introduce an advanced,
liquid-fueled, on-board hydrogen processor for our customers. We will continue
to develop and enhance our products by maintaining and expanding our current
relationships with automotive manufacturers in the development of a
liquid-fueled testing program.

    INDUSTRIAL ON-SITE HYDROGEN GENERATION MARKETS

    Our preliminary strategy for our on-site hydrogen generation business is to
capitalize on our market penetration within merchant gas companies. Our next
step is to target early adopters of our on-site generation technology, which are
being identified by focusing our sales and marketing effort on gas distributors
in the United States and chemical manufacturing companies in Europe. Through our
alliance with Gaz de France, we have established a major distribution channel in
Europe, and are currently seeking to establish distribution channels in North
America, Asia and South America. We are also taking steps to establish strategic
commercial partnerships with equipment manufacturers who are well established in
their respective markets. These strategic partners will have the potential to
expand their products and services portfolio into the industrial gas industry by
utilizing our systems.

COMPETITION

    The market for our products is highly competitive and is changing rapidly.
The principal bases of competition are system reliability, availability, cost
(including initial cost and total cost of ownership), and customer endorsement
and brand recognition.

    FUEL PROCESSORS FOR FUEL CELLS

    Our fuel processors for fuel cell systems compete with products produced by
companies such as Harvest Technologies, Idatech, International Fuel Cells, a
division of United Technologies, Johnson Matthey Incorporated, Mitsubishi and
Nuvera Fuel Cells.

    INDUSTRIAL HYDROGEN GENERATION SYSTEMS

    Our industrial hydrogen generation systems compete with products produced by
companies such as Air Liquide, Air Products and Chemicals, Linde and Praxair.
Other companies, such as Electrolyser, Norsk Hydro, Teledyne-Brown, Proton
Energy Systems, Inc. and Stuart Energy Systems Corporation produce
electrolysis-based hydrogen generation equipment.

RESEARCH AND DEVELOPMENT

    We have a centralized, highly talented engineering team and will continue to
develop new technologies and products, as well as improve existing products. We
also plan to continue to make significant investments in research and
development programs. Moreover, we will continue to design and develop
innovative hardware configurations in order to achieve improved operating
efficiencies that

                                       39
<PAGE>
can be applied across our product lines. We also focus on advanced concepts for
power generation and hydrogen purification applications that form the basis for
new commercial product lines and improved integration of concepts in order to
simplify hardware controls and reduce costs.

    Our engineering group designs and retains expertise in core technologies,
including our UOB-TM- design, systems integration and control systems. In
addition, our engineering team provides both technical and marketing support to
the marketing and project management for our various product lines. We will
continue to pursue strategic development partnerships and alliances when it is
advantageous from either a cost or competitive standpoint. Throughout product
design and development the engineering department has attempted to minimize
costs and simplify production by standardizing parts and designs across various
product lines. Our engineers work with our various customers, using the best
available technology, to design and develop our products to meet their
specifications.

INTELLECTUAL PROPERTY

    We have an active policy of protecting our intellectual property, which is
an important component of being a technology leader in the design and
development of hydrogen fuel processors used in fuel cell systems and on-site
hydrogen generators. We rely on a combination of patent, copyright, trademark,
trade secret and contract laws, as well as international treaties, to protect
our proprietary rights to our intellectual property, which includes technical
know-how, designs, special materials, manufacturing techniques, test equipment
and procedures. We also seek to protect our proprietary intellectual property,
including intellectual property that may not be patented or patentable, in part,
through the execution of confidentiality agreements with our strategic partners
and employees. We cannot assure you that these agreements will not be breached,
that we will have adequate remedies for any such breach or that persons will not
assert rights to our intellectual property arising out of our relationships with
them.

GOVERNMENT REGULATION

    Our products and their installation are subject to state and local
ordinances relating to building codes, safety, utility connections and related
matters. At this time, we cannot anticipate which jurisdictions, if any, will
impose regulations directed at our products or installation. We also do not know
the extent to which any existing or new regulations may impact our ability to
distribute, install and service our products. Once our products reach the
commercial stage and we begin distributing our systems to our early target
markets, federal, state or local government entities or competitors may seek to
impose regulations impacting us directly or indirectly. We intend to encourage
the standardization of industry codes to avoid having to comply with differing
regulations on a state-by-state or locality-by-locality basis.

EMPLOYEES

    We currently have 52 full-time employees and several part-time employees.
None of our employees is represented by a labor union, and we believe that our
relations with our employees are excellent. We have attracted a highly educated,
experienced team of professionals, of which approximately three have doctorate
degrees and twelve have M.S. or B.S. degrees in engineering disciplines.

LEGAL PROCEEDINGS

    We are not currently involved in any legal proceedings, nor have we been
involved in any such proceedings that have had or may have a significant effect
on our financial position. We are not aware of any material legal proceedings
pending or threatened against us. However, we may be required to repurchase
common stock that we issued to certain of our shareholders, see "Repurchase
Offer".

                                       40
<PAGE>
                                   MANAGEMENT

EXECUTIVE OFFICERS AND DIRECTORS

    The following table lists our executive officers and directors.

<TABLE>
<CAPTION>
                   NAME                       AGE                       POSITION
                   ----                     --------                    --------
<S>                                         <C>        <C>
David M. Moard............................    44       Chairman, President and
                                                       Chief Executive Officer
Michael K. Burke..........................    42       Chief Financial Officer
Hazen Burford.............................    41       Vice President of Engineering and General
                                                       Manager
Richard "Root" Woods......................    49       Vice President of Research and Development
Larry Frost...............................    52       Treasurer/Controller and Assistant
                                                       Secretary
Roger Saillant............................    57       Director
Jean-Louis Exbrayat.......................    51       Director
Dr. James N. Goffi(1).....................    54       Director
Dr. Larry L. Berg(2)......................    61       Director
Ivan Roch(1)..............................    57       Director
Henry Wedaa(1)............................    76       Director
Fred R. Seddiqui(2).......................    48       Director
David Freeman(2)..........................    74       Director
</TABLE>

--------------

(1) Member of the compensation committee

(2) Member of the audit committee

EXECUTIVE OFFICERS

    DAVID M. MOARD.  David Moard has served as the Chairman of our board of
directors, President and Chief Executive Officer since our incorporation in
1992. Mr. Moard conceived, developed and, with Leonard Greiner, co-patented the
UOB-TM- technology. Prior to our founding, Mr. Moard was Manager of Fuel Cells
at Southern California Gas Company, where he was responsible for the
establishment of commercial on-site cogeneration using fuel cells. As a result
of his experiences, Mr. Moard has broad technical, marketing and business
knowledge with regard to manufacturing. He also served as Manager of Fuel Cells
for the Gas Research Institute where he managed and directed field testing,
final product development and commercialization of fuel cells. Mr. Moard has a
B.S. degree in Mechanical Engineering from California Polytechnic State
University at San Luis Obispo.

    MICHAEL K. BURKE.  Michael Burke has served as our Chief Financial Officer
since joining us effective May 15, 2000. Mr. Burke has over 19 years of combined
investment and merchant banking experience to the power technology, energy and
electric utility industries. Prior to joining us in May of 2000, Mr. Burke was a
Managing Director within the U.S. Investment Banking Department of CIBC
Oppenheimer Corp. Previously, Mr. Burke was a Director within the Global
Investment Banking Division of the Barclays Bank Group, BZW. Mr. Burke's
professional experience includes mergers and acquisitions, merchant banking and
corporate finance. Mr. Burke is a graduate of Lake Forest College with a B.A.
degree in Economics.

    HAZEN BURFORD.  Hazen Burford has served as our Vice President of
Engineering and General Manager since joining us in September of 1996.
Mr. Burford has over 16 years of experience in project management, engineering,
design and management of petrochemical and utility projects. He has worked in a
number of technical and management positions regarding such plants and
refineries, and with respect to a wide range of energy-related projects
worldwide. He was also responsible for management of the engineering department
for a large Southern California architectural and

                                       41
<PAGE>
engineering firm. Mr. Burford has a B.S. degree in Mechanical Engineering from
California Polytechnic State University at San Luis Obispo.

    RICHARD "ROOT" WOODS.  Richard Woods has served as our Vice President of
Research and Development since joining us in January of 1996. Mr. Woods has over
21 years of experience in the fuel cell industry and an additional six years of
research experience with electrochemical systems. Prior to joining us, he was
Executive Advisor and Marketing Manager for M-C Power Corporation. From 1980
through 1991, Mr. Woods was manager of Gas Research Institute's Phosphoric Acid
Fuel Cell program. He also conducted several analytical studies for its Power
Generation Department. Mr. Woods has a B.S. degree in Engineering from Case
Western Reserve University, with a major in Macro-Molecular Science and a minor
in Bio-Medical Engineering.

    LARRY FROST.  Larry Frost has been our Treasurer/Controller and Assistant
Secretary since January 1, 1996. Prior to May 15, 2000, Mr. Frost was also our
Chief Financial Officer. Prior to joining us, Mr. Frost was a founder of
Sterling Bank, a private Los Angeles financial institution. He also worked with
the accounting firm of Femrite, Yager & Blank, and served as chief operating
officer of Calabassas Enterprises, Inc. Mr. Frost was a partner in JL
Enterprises, which specialized in the development of high quality real estate
projects such as hotels, industrial plazas and office buildings. Mr. Frost has a
B.S. degree in Accounting from California State University at Northridge.

NON-MANAGEMENT DIRECTORS

    ROGER SAILLANT.  Mr. Saillant has served as a director since July 20, 2000.
Mr. Saillant joined Ford Motor Company in 1970 as a Research Scientist. He moved
to Engine Engineering in 1975 and began a series of supervisor positions in the
catalyst and emissions area. From 1986 to 1989, as Plant Manager, Mr. Saillant
launched Ford Motor Company's Electronic Division's new Altec Plant in Mexico.
Other assignments in different component operations followed, including a post
as General Manufacturing Manager starting in 1990. In August of 1994, he became
Director of Technology and Process Leadership, a job he held until being named
Operations Manager of Component Engineering and Manufacturing in November of
1996. Mr. Saillant was promoted to Vice President and General Manager of
Visteon's Interior Systems in September of 1997. In November of 1998, he was
appointed to his present position as Vice President and General Manager of
Visteon's Energy Transformation Systems. Mr. Saillant holds a B.S. degree in
Chemistry from Bowdoin College in Maine, a Ph.D. in Chemistry from Indiana
University, and a post-doctorate degree from the University of California.

    JEAN-LOUIS EXBRAYAT.  Mr. Exbrayat has served as a director since July 20,
2000. Mr. Exbrayat is currently the Project Manager for the Commercial Division
of Gaz de France, and has held this position since January of 1999. As Project
Manager, Mr. Exbrayat is responsible for energy development and distribution for
Gaz de France. In 1998, Mr. Exbrayat served as the advisor to the Chief
Executive Officer of EDF-GDF Services, a division of Gaz de France. From 1995
through 1997, Mr. Exbrayat was Deputy Chief Executive Officer of Centre Paris
Aurore, a business unit of EDF-GDF Services, which distributes gas and
electricity in Paris, France. Mr. Exbrayat is a graduate of Ecole Polytechnique
and Ecole Nationale de Statistique et d'Administration Economique.

    DR. JAMES N. GOFFI.  Dr. Goffi has served as a director since March of 1997.
Dr. Goffi is also the Chairman of the compensation committee of our board.
Dr. Goffi is General Manager of Sunbeam Corporation's Waynesboro, Mississippi
electric bedding manufacturing facility. Prior to this position, Dr. Goffi
worked 25 years with Scott Paper Company. During his career in the pulp and
paper industry, Dr. Goffi held various management positions. Dr. Goffi received
his B.S., M.S. and Ph.D. degrees in Chemical Engineering from the University of
Maine.

    DR. LARRY L. BERG.  Dr. Berg has served as a director since March of 1998.
Dr. Berg formed Larry Berg and Associates, a consulting firm, in 1984 after a
twenty-six year career as a professor and

                                       42
<PAGE>
administrator at the University of Southern California. From 1983 to 1993 he
served as the Speaker of the California Assembly's representative on the
Governing Board of the Southern California Air Quality Management District
before leaving to pursue environmental and energy development activities in the
private business sector. Dr. Berg negotiated a technology sharing agreement with
the Province of Ontario, Canada; this agreement being the forerunner to the
first formal Memorandum of Understanding between the Province of British
Columbia and the Southern California Air Quality Management District. From 1994
to 1997, Dr. Berg served on the board of directors of Ballard Power
Systems Inc. Dr. Berg received his B.A. and M.A. degrees from the University of
Iowa, and his Ph.D. from the University of California Santa Barbara.

    IVAN ROCH.  Mr. Roch has served as a director since November of 1999.
Mr. Roch is a member of the compensation committee of our board of directors.
From 1997 to 1999, Mr. Roch served as a consultant (in the capacity of a general
manager) to Ateliers Wood Inc., a company that specializes in electrochemical
equipment repairs. Mr. Roch was employed from 1995 to 1997 as the President and
General Manager of Les Materiaux De Pointe Precitech Inc., a start-up venture
that manufactured powder metal parts for industrial uses. From 1994 to 1995,
Mr. Roch was a Project Manager for Les Enterprises Barrette Ltee and focused on
developing products from excess raw material used in a saw milling operation.
Mr. Roch holds a B.S. degree in Industrial Mechanics from the University of
Montreal.

    HENRY WEDAA.  Mr. Wedaa has served as a director since March of 1998.
Mr. Wedaa is a member of the compensation committee of our board of directors.
Mr. Wedaa is president of Valley Environment Associates in Yorba Linda,
California, an organization he started in 1970 that specializes in environmental
studies, air quality issues, intergovernmental relations and new business
activities. He served as Board Chairman of the Governing Board of the Southern
California Air Quality Management District for several years. Mr. Wedaa has
written, or co-written more than 30 technical papers on various subjects
including shock tube phenomena, weapons and explosive systems, warhead
development, fuel cells, and airport land use. Mr. Wedaa received his bachelor's
degree in Physics from Gettysburg College in Pennsylvania in 1949 and his
master's degree from the University of Arizona.

    FRED R. SEDDIQUI.  Mr. Seddiqui has served as a director since February of
1999. Mr. Seddiqui is a member of the audit committee of our board of directors.
Mr. Seddiqui is the President and Chief Executive Officer of Product Success
Inc. Mr. Seddiqui was formerly President and Chief Executive Officer of Fidus
Medical Technology since founding that company in 1992. Mr. Seddiqui is also
President of Silicon Valley Venture Partners. Mr. Seddiqui holds an M.B.A. from
Golden Gate University in California, as well as B.S. and M.S. degrees in
Engineering from Fairleigh Dickenson University. He is past chairman of the
American Society of Mechanical Engineering, Santa Clara Valley Section. He has
authored the book "Engineering Functions Concerning Industry" published by
Vantage Press, New York.

    DAVID FREEMAN.  Mr. Freeman has served as a director since July of 2000.
Since September of 1997, Mr. Freeman has been the General Manager of the Los
Angeles Department of Water and Power. Prior to this appointment, Mr. Freeman
served as the Trustee for the California Independent System Operator and the
California Power Exchange Trusts, Mr. Freeman was President and Chief Executive
Officer of the New York Power Authority from 1994-1996. Mr. Freeman has
20 years of experience as a public power chief executive officer, including
positions at the Tennessee Valley Authority (as a director from 1977-1984), the
lower Colorado River Authority, and the Sacramento Municipal Utility District
(as general manager from 1990-1994). Mr. Freeman has also served in various
high-level government positions including being an energy advisor to President
Carter and as an energy consultant to the U. S. Senate Commerce Committee, head
of the energy policy staff in the White House Office of Science and Technology
and as executive assistant to the chairman of the Federal Power Commission.
Mr. Freeman earned his B.S. degree in Civil Engineering from the Georgia
Institute of Technology and his law degree from the University of Tennessee Law
School.

                                       43
<PAGE>
BOARD COMPOSITION

    Our board of directors currently is comprised of nine members. Directors are
elected by our shareholders at each annual meeting and serve for one year or
until their successors are elected and qualified. Pursuant to the reorganization
agreement entered into in September of 2000 with Sofinov and the seven
individual members of Phoenix Gas Systems, LLC, Sofinov will retain the right
following the closing of this offering to nominate for election one director to
our board of directors so long as Sofinov holds our unregistered securities and
owns five percent or more of our outstanding securities on a fully diluted
basis. There are no family relationships among any of our directors and
executive officers.

ELECTION OF DIRECTORS

    Following the offering, our articles of incorporation will provide that our
board of directors will be divided into three classes with staggered, three-year
terms. The term of office of our Class I directors will expire at the annual
meeting of shareholders to be held in 2001; the term of office of our Class II
directors will expire at the annual meeting of shareholders to be held in 2002;
and the term of office of our Class III directors will expire at the annual
meeting of the shareholders to be held in 2003. At each annual meeting of the
shareholders, beginning with the 2001 annual meeting, the successors to the
directors whose terms have expired will be elected to serve until the third
annual meeting following their election or until their successors have been
elected, unless they resign or are removed earlier. Messrs. Wedaa, Freeman and
Seddiqui have been designated as Class I directors; Messrs. Roch, Goffi and
Exbrayat have been designated as Class II directors; and Messrs. Moard, Berg and
Saillant have been designated as Class III directors. The classification of our
board of directors could have the effect of making it more difficult for a third
party to acquire, or of discouraging a third party from acquiring, control of
us.

BOARD COMMITTEES

    COMPENSATION COMMITTEE.  Our board of directors established the compensation
committee in April of 1999. The non-employee members of the compensation
committee are Dr. James Goffi, Henry Wedaa and Ivan Roch. The compensation
committee reviews and makes determinations of, or recommendations to our board
of directors with respect to, compensation and benefits of senior officers as
well as the total compensation structure of similarly situated job categories
applicable to all of our other employees. Our compensation committee also
administers and grants stock options and stock awards to our employees pursuant
to our 2000 Stock Incentive Plan. The compensation committee met four times in
1999.

    AUDIT COMMITTEE.  Our board of directors established the audit committee in
August of 2000. The members of the audit committee are Dr. Larry Berg, Fred
Seddiqui and David Freeman. None of the audit committee members is or has ever
been an employee of our company or any affiliated company or large shareholder
of our company. Our audit committee will meet with the independent auditors to
review the adequacy of our internal control systems and financial reporting
procedures; review the general scope of the annual audit and the fees charged by
the independent auditors; review and monitor the performance of non-audit
services by the auditors; review the fairness of any proposed transaction
between us and any officer, director or other affiliate, and after such review,
make recommendations to our board of directors; and shall perform such further
functions as may be required by any stock market or quotation service upon which
our common stock may be listed.

COMPENSATION COMMITTEE INTERLOCKS AND INSIDER PARTICIPATION.

    None of the members of the compensation committee is or has been our
employee at any time since our formation. None of our executive officers serves
as a member of the board of directors or compensation committee of any entity
that has one or more executive officers serving as a member of our board of
directors or compensation committee.

                                       44
<PAGE>
DIRECTOR COMPENSATION

    Each of our non-employee directors receives a fee of $500 for each of our
board meetings attended and all members of our board of directors are reimbursed
for all reasonable expenses incurred in attending our board and committee
meetings. In April of 2000, we adopted the 2000 Stock Incentive Plan, which
provides, in addition to the grant of employee stock compensation, non-employee
director stock compensation.

    Non-employee directors receive options as of January 15 of each year of
service as a member of our board of directors. Such options are immediately
vested and remain exercisable, for seven years from the date of grant unless the
director resigns or is not re-elected prior to the expiration date of the
options. Incumbent non-employee directors each received 7,000 options in 1999,
and 5,000 options in 2000. Beginning in 2001, non-employee directors will
receive grants of 5,000 options each year, for so long as shares remain
available for issuance under our 2000 Stock Incentive Plan. Any non-employee
director elected for the first time after January 15 of a year is entitled to an
unprorated grant of 5,000 options for that year and will continue to receive
5,000 options each year, for so long as shares remain for issuance available
under our 2000 Stock Incentive Plan.

EXECUTIVE COMPENSATION

    The following table provides information concerning the compensation paid
during the years ended December 31, 1997, 1998 and 1999, to our chief executive
officer and each of our other most highly compensated executive officers whose
total compensation exceeded $100,000 during our 1999 fiscal year. We did not pay
any other executive officer over $100,000 in 1999.

                           SUMMARY COMPENSATION TABLE

<TABLE>
<CAPTION>
                                                                                               LONG-TERM
                                                                                              COMPENSATION
                                                                                                 AWARDS
                                                ANNUAL                                        ------------
                                             COMPENSATION                                      SECURITIES
                                          -------------------                OTHER ANNUAL      UNDERLYING       ALL OTHER
NAME AND PRINCIPAL POSITION                 YEAR      SALARY    BONUS($)    COMPENSATION($)    OPTIONS(#)    COMPENSATION($)
---------------------------               --------   --------   ---------   ---------------   ------------   ---------------
<S>                                       <C>        <C>        <C>         <C>               <C>            <C>
David M. Moard,                             1997     $150,000         --              --              --               --
  Chairman of the Board, President &        1998     $150,000         --              --         620,000               --
  Chief Executive Officer                   1999     $150,000         --              --         105,000

Hazen Burford,                              1997     $110,500         --              --              --               --
  Vice President of Engineering             1998     $110,500         --              --         197,500               --
                                            1999     $110,500         --              --          70,000               --

Richard "Root" Woods,                       1997     $110,000         --              --              --               --
  Vice President of Research and            1998     $110,000         --              --         197,500               --
  Development                               1999     $110,000         --              --          70,000               --

Larry Frost,                                1997     $125,000         --              --              --               --
  Treasurer/Controller & Assistant          1998     $125,000         --              --         197,000               --
  Secretary                                 1999     $125,000         --              --          70,000               --
</TABLE>

OPTION GRANTS DURING FISCAL YEAR 1999

    The table below provides information regarding stock options we granted in
fiscal year 1999 to our chief executive officer and the other executive officers
whose compensation exceeded $100,000 in fiscal 1999. The exercise price
represents our board of directors' estimate of the fair market value of our
common stock on the grant date. The table includes the potential realizable
value over the seven-year term of the options, assuming that the market value of
our stock appreciates from the date of grant to the expiration of the option at
rates of 5% and 10%, compounded annually. The assumed rates of

                                       45
<PAGE>
appreciation that we included in the table below are prescribed by the
Securities and Exchange Commission for illustrative purposes only and are not
intended to forecast or predict future stock prices. Any actual gains on option
exercises will depend on the future performance of our stock.

<TABLE>
<CAPTION>
                                                                                               POTENTIAL REALIZABLE
                                            OPTION GRANTS DURING FISCAL YEAR 1999                VALUE AT ASSUMED
                                  ---------------------------------------------------------    ANNUAL RATES OF STOCK
                                  NUMBER OF       PERCENT OF                                           PRICE
                                  SECURITIES    TOTAL OPTIONS                                 APPRECIATION FOR OPTION
                                  UNDERLYING      GRANTED TO                                           TERM
                                   OPTIONS       EMPLOYEES IN       EXERCISE     EXPIRATION   -----------------------
NAME                              GRANTED(#)   FISCAL YEAR 1999   PRICE ($/SH)      DATE        5%($)       10%($)
----                              ----------   ----------------   ------------   ----------   ---------   -----------
<S>                               <C>          <C>                <C>            <C>          <C>         <C>
David M. Moard..................   105,000           19.7%             $5         10/28/06    $738,728    $1,023,076
Hazen Burford...................    70,000           13.1%             $5         10/28/06    $492,485    $  682,051
Richard "Root" Woods............    70,000           13.1%             $5         10/28/06    $492,485    $  682,051
Larry Frost.....................    70,000           13.1%             $5         10/28/06    $492,485    $  682,051
</TABLE>

FISCAL YEAR-END OPTION VALUES

    None of our executive officers whose compensation exceeded $100,000 in
fiscal year 1999 exercised any options in 1999. The table below provides
information regarding options exercised during 1999 and unexercised options held
as of December 31, 1999 by our chief executive officer and the other executive
officers whose compensation exceeded $100,000 in fiscal 1999. The value of
realized options and the value of unexercised in-the-money options is calculated
on the basis of an assumed initial public offering price of $  per share.

      AGGREGATE OPTION EXERCISES IN FISCAL 1999 AND YEAR END OPTION VALUES

<TABLE>
<CAPTION>
                                                            NUMBER OF             VALUE OF UNEXERCISED IN-
                                                      SECURITIES UNDERLYING                 THE-
                                                     UNEXERCISED OPTIONS AT        MONEY OPTIONS AT FISCAL
                                                       FISCAL YEAR END(#)                YEAR-END($)
                                                   ---------------------------   ---------------------------
NAME                                               EXERCISABLE   UNEXERCISABLE   EXERCISABLE   UNEXERCISABLE
----                                               -----------   -------------   -----------   -------------
<S>                                                <C>           <C>             <C>           <C>
David M. Moard...................................    655,000        70,000       $                $
Hazen Burford....................................    220,833        46,667       $                $
Richard "Root" Woods.............................    220,833        46,667       $                $
Larry Frost......................................    220,833        46,667       $                $
</TABLE>

EMPLOYMENT AGREEMENTS AND CHANGE IN CONTROL ARRANGEMENTS

    We have entered into an employment agreement with David Moard, our President
and Chief Executive Officer, effective as of August 1, 2000. Mr. Moard's
employment agreement has a term of three years and provides for an annual base
salary of $200,000, a performance bonus of up to 200% of his base salary and an
increase in his base salary to $300,000 commencing January 1, 2001. In addition,
the agreement provides for termination of employment on 30 days' written notice
by either party, subject to continuation of his base compensation for up to two
years if Mr. Moard is terminated without cause and he agrees to certain
non-competition provisions. In connection with the execution of his employment
agreement, Mr. Moard received fully vested options to purchase 105,000 shares of
our common stock at a purchase price of $5.00 per share and fully vested options
to purchase 3,750 shares of our common stock at a purchase price of $5.50 per
share. Mr. Moard may receive additional option grants, if approved by the
compensation committee.

    Mr. Burke, our Chief Financial Officer, has entered into an employment
agreement with us effective May 15, 2000, which provides for an annual base
salary of $175,000. Mr. Burke's employment agreement further provides that his
annual base salary will increase to $200,000 upon the later to occur of
January 1, 2001 or the completion of this offering. Mr. Burke is also eligible
to receive, at the

                                       46
<PAGE>
discretion of our board of directors, a performance bonus of up to 200% of his
base salary. Mr. Burke has been granted options to purchase 1,000,000 shares of
our common stock at an exercise price of $5.00 per share. Options for 200,000
shares are vested and exercisable by Mr. Burke up until the day before this
offering. Options for an additional 100,000 shares are vested and remain
exercisable through May 15, 2007. An additional 200,000 options will vest upon
the completion of this offering and shall remain exercisable through May 15,
2007. An additional 300,000 options will vest in 100,000 share increments on
each January 1, beginning in 2001, and will remain exercisable through May 15,
2007. The remaining 200,000 options will vest if within one year following the
date of this offering, the market capitalization of our issued and outstanding
common stock achieves a specified minimum average over twenty consecutive
trading days. Mr. Burke's employment agreement is subject to termination upon
his death, illness, disability or other incapacity, or upon Mr. Burke providing
30 days' prior written notice or by a notice of termination from us. We may
terminate Mr. Burke's employment immediately for cause or upon 30 days' prior
notice without cause. In the event Mr. Burke is terminated without cause, he
will receive his base salary for a period of 12 months provided he provides
consulting services and does not violate confidentiality and non-competition
covenants set forth in his employment agreement.

    We have entered into employment agreements with each of Messrs. Frost,
Burford and Woods, all effective as of August 1, 2000. Each of these employment
agreements has a maximum term of three years, however, the agreements may be
terminated at any time by either party upon 30 days' written notice. If we
terminate any of Messrs. Frost, Burford or Woods without cause, then we are
obligated to continue to pay such individual's then-existing base salary for one
year, so long as such individual agrees to certain non-competition provisions.
For the year ending December 31, 2000, Mr. Frost's annual base salary is
$131,250 and Messrs. Burford and Woods each have an annual base salary of
$115,500. Commencing January 1, 2001, Mr. Frost's base salary shall be increased
to $150,000 per year, Mr. Burford's salary shall be increased to $175,000 and
Mr. Woods' base salary shall be increased to $160,000 per year. Each of
Messrs. Frost, Burford and Woods may receive a performance-based bonus of up to
160% of their base salary at the end of each year of service to us. In addition,
in connection with the execution of their employment agreements, each of
Messrs. Frost, Burford and Woods received fully vested options to purchase
70,000 shares of common stock at a purchase price of $5.00 per share and each of
them may receive additional option grants, if approved by the compensation
committee.

BENEFIT PLANS

    STOCK OPTIONS

    On July 31, 1998, our board of directors adopted a resolution calling for
the issuance of options under certain individual non-statutory option agreements
to certain key executives in consideration of their past services, and in lieu
of cash bonuses that we had been unable to pay to them through 1998. Grants of
such options to individual executives consisted of 620,000 options granted to
David Moard, 40,000 options granted to Leonard Greiner, 197,500 options granted
to each of Larry Frost, Hazen Burford and Richard Woods, 7,500 options granted
to John Cuzens and 25,000 options granted to Dick Williams, an executive who has
since left our employment. The options granted were in an aggregate amount of
1,285,000 shares. The options are immediately exercisable in their entirety at a
price of $1.00 per share and remain exercisable through July 30, 2005.

    Our board of directors, by a unanimous written consent effective as of
October 29, 1999, ratified the 1998 grants and approved a form of option
agreement for the implementation of such option grants and further granted
options for 343,000 additional shares to five executive officers for their 1999
service to our company. The individual grants consisted of 105,000 shares to
David Moard, 70,000 shares to each of Larry Frost, Hazen Burford and Richard
Woods, and 28,000 shares to John Cuzens. One third of the options vested on
January 1, 2000 and an additional one third will vest on each January 1

                                       47
<PAGE>
thereafter if the relevant employee remains employed by us on that date. The
options are exercisable any time prior to October 28, 2006, at the price of
$5.00 per share unless they expire earlier by reason of the optionee's
termination. Early termination provisions are substantially the same as the
provisions that apply to our 2000 Stock Incentive Plan, as described below.

    2000 STOCK INCENTIVE PLAN

    Our 2000 Stock Incentive Plan was adopted by our board of directors on
April 30, 2000 and approved by our shareholders on July 20, 2000. Our 2000 Stock
Incentive Plan reserves 1,575,000 shares of our common stock for grants to
employees, non-employee directors and consultants. Grants permitted under this
plan include incentive stock options, nonstatutory stock options and shares of
stock sold subject to forfeiture restrictions. Our 2000 Stock Incentive Plan is
administered by the compensation committee of our board of directors, which
determines the terms and conditions of individual grants pursuant to the 2000
Stock Incentive Plan. The minimum exercise price of incentive stock options
granted under the 2000 Stock Incentive Plan is 100% of the fair market value of
the stock at the time of grant, as determined by the board of directors in good
faith. The exercise price of incentive stock options must at least equal 110% of
fair market value in the case of incentive stock options granted to an employee
who holds, at the time the option is granted, more than 10% of the total voting
power of all classes of our stock. Our compensation committee determines the
term of the options, which may not exceed ten years, or five years in the case
of an incentive stock option granted to an employee who holds, at the time the
option is granted, more than 10% of the total voting power of all classes of our
stock.

    With respect to nonstatutory stock options, the minimum exercise price
permitted by our 2000 Stock Incentive Plan is 85% of the fair market value at
the time of grant, as determined by the board of directors in good faith. Our
compensation committee has granted both incentive stock options and nonstatutory
stock options pursuant to the 2000 Stock Incentive Plan, generally exercisable
at 100% of its determination of fair market value at the date of grant. The 2000
Stock Incentive Plan permits early exercise of stock option grants prior to
vesting, whereby the shares of common stock purchased pursuant to such early
exercise remain subject to restrictions during the original period of vesting.
However, our compensation committee has thus far not permitted early exercise.
The minimum vesting required by the 2000 Stock Incentive Plan is 20% per year
from the date of grant. However, our compensation committee has generally
followed a policy of permitting options to vest as to one-third of the shares as
of each January 1 following the date of grant, provided the optionee remains in
service with us. Options generally expire on the day before the seventh
anniversary of the date of grant but will expire earlier under certain
circumstances. The options expire immediately in the event of a termination of
employment for cause. In the event of a termination for reasons other than for
cause, the option expires three months after termination of employment provided
that such three-month period is extended by nine months in the event termination
of service is involuntary on the part of the optionee, but without cause. The
period of time for exercise is generally extended to three years in the case of
death, disability, retirement (as defined) of the optionee, or change in control
of our company. Options may be subject to forfeiture in the event of violation
of certain confidentiality provisions or, in certain limited circumstances, if
the optionee competes with us. The enforceability of these forfeiture provisions
by us is not free from doubt.

    No option may be transferred by the optionee other than by will or the laws
of descent or distribution. To the extent an optionee would have the right in
any calendar year to exercise for the first time one or more incentive stock
options for shares having an aggregate fair market value in excess of $100,000
as of the date the options were granted, the excess options will be treated as
non-statutory stock options.

    In the event that we are a party to a merger or consolidation, outstanding
options shall be subject to any such agreement of merger or consolidation.
Without the optionee's consent, outstanding options

                                       48
<PAGE>
may be continued, assumed or substituted by the successor corporation. If the
party that survives the merger or consolidation does not agree to continue,
assume or substitute, the options will terminate upon the closing of the
transaction, subject to an opportunity to exercise vested options being afforded
to the optionee.

    Our board of directors may amend, modify or terminate the 2000 Stock
Incentive Plan if any amendment, modification or termination does not impair
existing rights of plan participants. Additionally, shareholder approval is
required for an amendment to the extent required by applicable law, regulations
or rules.

    As of August 30, 2000:

    - a total of 1,575,000 shares had been reserved for issuance under the 2000
      Stock Incentive Plan;

    - options to purchase an aggregate of 3,698,401 shares of common stock,
      1,070,401 of which were granted under our 2000 Stock Incentive Plan, have
      been granted at exercise prices of $1 to $5.50 per share;

    - no outstanding options under the stock option agreements or our 2000 Stock
      Incentive Plan had been exercised; and

    - 504,599 shares remained available for future grant under the 2000 Stock
      Incentive Plan.

    401(K) PLAN

    We maintain a 401(k) plan that covers all our employees who satisfy our
plan's eligibility requirements relating to minimum age, length of service and
hours worked. We may make an annual contribution for the benefit of eligible
employees in an amount determined by our board of directors. We have not made
any contribution to date and have no current plans to do so. Eligible employees
may make pretax elective contributions of up to 15% of their compensation,
subject to maximum limits on contributions prescribed by law.

DIRECTOR AND OFFICER INDEMNIFICATION AND LIABILITY

    Our Amended and Restated Articles of Incorporation, to be filed and
effective upon completion of this offering provide for indemnification of our
directors and officers to the maximum extent permitted by the California General
Corporation Law, and our amended and restated bylaws, to be effective upon
completion of this offering provide for indemnification of our directors,
officers, employees and other agents to the maximum extent permitted by the
California General Corporation Law.

    In addition, we have entered into indemnification agreements with our
directors and officers containing provisions that are in some respects broader
than the specific indemnification provisions contained in the California General
Corporation Law. The indemnification agreements may require us, among other
things, to indemnify our directors and officers against certain liabilities that
may arise by reason of their status or service as directors or officers (other
than liabilities arising from willful misconduct of a culpable nature), to
advance their expenses incurred as a result of any proceeding against them as to
which they could be indemnified, and to obtain directors' and officers'
insurance if available on reasonable terms.

    We have obtained a policy of directors' and officers' liability insurance
that insures our directors and officers against the cost of defense, settlement
or payment of a judgment under certain circumstances. The policy is effective
through December of 2000.

                                       49
<PAGE>
                 CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS

PHOENIX HYDROGEN SYSTEMS LLC AND PHOENIX GAS SYSTEMS LLC

    In August of 1996, we entered into a joint venture arrangement with Sofinov
for the exploitation and licensing of our hydrogen production technology and
related patents, trademarks and licenses. We jointly formed Phoenix Hydrogen
Systems LLC, a California limited liability company, in which Sofinov acquired,
through an affiliate, a 30% membership interest for $2 million in cash and we
acquired the remaining 70% interest in exchange for $250,000 in cash, a note for
$750,000 and a worldwide exclusive license to make, use, sublicense, sell and
exploit in perpetuity our UOB-TM- technology and related patents, trademarks,
trade names, and other intellectual property for all uses. In addition in April
of 1996, we formed Phoenix Gas Systems LLC, a California limited liability
company, in anticipation of the pending Sofinov venture, with seven individuals
to exploit the technology in conventional industrial hydrogen markets. Sofinov,
through another affiliate, acquired an approximate 28.6% interest in Phoenix Gas
Systems LLC for a $2 million cash investment and we and the seven individuals
retained the remaining membership interests. During 1998 and 1999, we made
additional equity investments in Phoenix Gas Systems, LLC and our membership
interests increased to 66.7% in 1998 and 66.9% in 1999. In August of 1996,
Phoenix Hydrogen Systems LLC sublicensed to Phoenix Gas Systems LLC an exclusive
worldwide license to make, use, market, sell and exploit, in perpetuity, the
technology for the limited "field of use" of all conventional hydrogen markets,
including chemical, refinery, metals, food, hydrogen peroxide, glass,
electronics and other uses where hydrogen is not used as fuel but rather as a
feedstock to industrial products and processes. The sub-license to Phoenix Gas
Systems LLC excluded the right to use or exploit such technology in fields of
use where hydrogen is used directly as a fuel, including fuel cells and internal
combustion engines, boilers, burners and heat processors.

REORGANIZATION TRANSACTION

    In September of 2000, we entered into a reorganization agreement with
Sofinov and the seven individual members of Phoenix Gas Systems LLC to merge our
subsidiaries, Phoenix Hydrogen Systems LLC and Phoenix Gas Systems LLC, into a
new California corporation, named Phoenix Hydrogen Systems, Inc. In this
reorganization, we received 9,353,169 shares of common stock of Phoenix Hydrogen
Systems, Inc., or approximately 65.81% of the outstanding stock, Sofinov
received 4,187,458 shares, or approximately 29.46% of the outstanding stock, and
the seven individuals received in the aggregate 674,700 shares, or approximately
3.8% of the outstanding stock. The reorganization agreement further provides
that, immediately prior to the closing of a public offering of our common stock,
Phoenix Hydrogen Systems, Inc. will be merged into us and each outstanding share
of stock in Phoenix Hydrogen Systems, Inc. will be exchanged for one share of
our common stock, except our shares, which will be cancelled. In addition, the
reorganization agreement provides that Sofinov has the right to purchase an
additional 2,178,000 shares of our common stock for $10,890,000 in cash
immediately prior to the closing of this offering. Sofinov has indicated that it
intends to exercise this purchase right. As a result of this reorganization
transaction, all of the rights, liabilities and properties held by Phoenix
Hydrogen Systems, Inc., including the technology, will be transferred and
assigned to us by operation of law and the shareholders of Phoenix Hydrogen
Systems, Inc. will become our shareholders. The reorganization transaction will
be effective immediately prior to the closing of this offering.

SOFINOV

    In April of 1999, we sold 1,101,447 shares of our common stock to Sofinov
for $1,101,447 in the form of $800,000 in cash and the cancellation of a
$300,000 demand promissory note and the interest accrued thereon.

                                       50
<PAGE>
VISTEON CORPORATION

    In June of 2000, we entered into a stock purchase agreement with Visteon
pursuant to which Visteon purchased 400,000 shares of our common stock for
$2 million in cash.

    On June 20, 2000, we entered into a letter of intent for an exclusive
engineering, development and manufacturing alliance with Visteon Corporation
with respect to the development and manufacture of our hydrogen fuel processors
for fuel cell systems. Visteon is the world's second largest supplier of
automotive systems, modules and components to global vehicle manufacturers.
Based on our letter of intent, we intend to enter into the following agreements:

    - ENGINEERING SERVICES AGREEMENT: Visteon will provide engineering, design
      and support services relating to our hydrogen fuel processors, including
      services related to the establishment of our prototype facility.

    - JOINT DEVELOPMENT AGREEMENT: We will jointly design, own and exploit with
      Visteon proprietary technology and know-how related to the manufacture of
      our hydrogen fuel processors.

    - CONTRACT MANUFACTURING AGREEMENT: Visteon will manufacture substantially
      all of our hydrogen fuel processors for fuel cell systems.

    We believe that our relationship with Visteon will significantly accelerate
our efforts to achieve large-scale commercial production of our hydrogen fuel
processors for fuel cell systems as well as enhance our ability to produce the
highest quality and most cost-efficient products.

    Upon the signing of the engineering services agreement with Visteon, we will
issue 10,691,350 shares of our common stock to Visteon. We will value these
shares of common stock issued under the agreement at approximately
$53.5 million. The value will be recorded as a reduction in our shareholders'
equity and this amount will be amortized into operating expenses over the period
that Visteon provides us with engineering services under our agreement.

    As a result of the issuance of the 10,691,350 shares and Visteon's previous
purchase of 400,000 shares of our common stock in June of 2000, Visteon will own
approximately     % of our common stock after giving effect to the offering.

GAZ DE FRANCE

    On July 13, 2000, we entered into a five-year agreement with one of the
leading natural gas suppliers and distributors in the world, Gaz de France,
under which Gaz de France will become the exclusive distributor of our hydrogen
generating systems for industrial use and refueling stations in the European
Union, Norway and Switzerland. This distribution agreement includes an annual
take-or-pay requirement equal to one-half of the agreed upon minimum purchase
quota. In 2001, we expect that Gaz de France will purchase a minimum of eight
units of our industrial hydrogen generation systems. The minimum purchase quota
and take-or-pay requirement are determined annually based on our projected
number of sales and are subject to adjustment, up or down, if our actual sales
in the U.S. differ from projected sales. If Gaz de France fails to meet its
annual take-or-pay requirement, we may terminate this agreement upon giving Gaz
de France an additional 12 months to fulfill this requirement. In addition, we
plan to develop enhanced hydrogen generation systems and conduct related
research together with Gaz de France.

    As part of this arrangement, G.D.F. International, a wholly owned subsidiary
of Gaz de France, acquired 1,050,000 shares of our common stock in exchange for
$3,700,000 in cash and the cancellation of our outstanding debt to Gaz de France
in the amount of $1,550,000. In addition, we issued to G.D.F. International a
warrant to acquire 1,000,000 shares of our common stock for $4.00 per share,
which G.D.F. International intends to exercise prior to the commencement of this
offering. Assuming exercise

                                       51
<PAGE>
of the warrant, G.D.F. International will own approximately   % of our common
stock, after giving effect to the offering.

SHAREHOLDER LOANS AND ADVANCES AND CONVERSION OF DEBTS AND LIABILITIES

    As of December 31, 1998 and 1999 and at June 30, 2000, we had certain loans
outstanding to our shareholders and other individuals aggregating $162,000,
$157,000 and $80,000, respectively, all at an annual 10% interest rate. Under
the terms of the loans, the note holders had the option to convert their loans
into shares of our common stock for an exchange ratio of $1.00 per share. During
1998, certain of our shareholders and other individuals converted $408,000 of
their notes payable, as well as $164,000 of accrued liabilities, into
572,000 shares of our common stock. During 1999, certain of our shareholders and
other individuals converted $615,000 of their notes payable, as well as $674,000
of accrued liabilities, into 1,236,000 shares of our common stock. One of the
notes converted in 1999 was for $500,000. None of the other converted notes
exceeded $60,000. As of August 30, 2000, all of the shareholder notes had been
repaid or converted into shares of our common stock and we had no further
liabilities outstanding under those notes.

    In 1996, we issued 44,444 shares of our common stock to each of Messrs.
Burford, Frost and Woods, in exchange for promissory notes payable to us. In
September of 1998, we paid a stock dividend of 1.4 shares on each outstanding
share of our common stock. Accordingly, we cancelled the 1996 notes, issued new
notes and adjusted the shares to 106,666 for each of Messrs. Burford, Frost and
Woods to reflect the dividend. The notes bear interest at 5% per annum and
provide that principal and interest amounts may be forgiven at each employee's
discretion. The employees may not transfer or sell the stock until the related
promissory note is repaid or forgiven. Until each note is repaid or forgiven, we
retain the right to repurchase the stock if the employee voluntarily leaves our
employment or is fired for misconduct.

TRANSACTIONS WITH EXECUTIVE OFFICERS, DIRECTORS AND SIGNIFICANT SHAREHOLDERS

    Other than as described above, we have not engaged in any material
transactions with our directors, executive officers, significant shareholders or
the immediate family members of any of such entities.

INDEMNIFICATION AGREEMENTS

    We have entered into indemnification agreements with some of our officers
and directors. See "Management--Director and Officer Indemnification and
Liability."

                                       52
<PAGE>
                             PRINCIPAL SHAREHOLDERS

PRINCIPAL SHAREHOLDERS

    The following table provides information regarding the beneficial ownership
of our outstanding common stock, for:

    - our chief executive officer;

    - the other executive officers whose compensation exceeded $100,000 in
      fiscal 1999;

    - each of our directors;

    - each person or group that we know beneficially owns more than 5% of the
      outstanding shares of our common stock; and

    - all of our directors and executive officers as a group.

    The percentage of beneficial ownership before the offering is based on the
beneficial ownership of our common stock as of August 30, 2000, as adjusted to
reflect the issuance of 1,000,000 shares of our common stock upon exercise of
all outstanding warrants, the issuance of 4,862,158 shares of common stock and
the sale of 2,178,000 shares of common stock in connection with the
reorganization to eliminate the minority interests in our subsidiaries and the
issuance of 10,691,358 shares of common stock in exchange for Visteon's
engineering services, all occurring immediately prior to the completion of this
offering. See "Certain Relationships and Related Transactions."

    The percentage of beneficial ownership after the offering is based on
                   shares, including the         shares of common stock to be
sold in this offering.

    Beneficial ownership is determined in accordance with the rules of the
Securities and Exchange Commission and includes voting or investment power with
respect to the securities. Except as otherwise indicated, the persons named in
the table have sole voting and investment power with respect to all common stock
held by them. The number of shares of common stock outstanding used in
calculating the percentage for each listed person includes the common stock
underlying warrants, options or other rights to acquire our common stock held by
such person that are exercisable within sixty (60) days of August 30, 2000, but
excludes common stock underlying warrants, options or other rights to acquire
our common stock held by any other person.

                                       53
<PAGE>

<TABLE>
<CAPTION>
                                                                                           PERCENTAGE OF SHARES
                                                                                             OF COMMON STOCK
                                                                                               OUTSTANDING
                                                             NUMBER OF SHARES             ----------------------
                                                             OF COMMON STOCK               BEFORE        AFTER
NAME AND ADDRESS OF BENEFICIAL OWNER(1)                     BENEFICIALLY OWNED            OFFERING      OFFERING
---------------------------------------               ------------------------------      --------      --------
<S>                                                   <C>                                 <C>           <C>
EXECUTIVE OFFICERS AND DIRECTORS
  David M. Moard (2)................................                      3,306,060         10.69%            %
  Michael K. Burke (3)..............................                        500,000          1.64%
  Hazen Burford (4).................................                        431,239          1.42%
  Larry Frost (5)...................................                        446,238          1.47%
  Richard Woods (6).................................                        437,499          1.44%
  Jean-Louis Exbrayat (7)...........................                      2,055,000          6.60%
  Dr. James N. Goffi (8)............................                        274,264             *%
  Dr. Larry Berg (9)................................                         33,666             *%
  Ivan Roch (10)....................................                      7,478,905         20.50%
  Roger Saillant (11)...............................                     11,096,350         27.19%
  Henry Wedaa (12)..................................                         82,000             *%
  Fred R. Seddiqui (12).............................                         12,000             *%
  David Freeman (13)................................                          5,000             *%
OTHER 5% SHAREHOLDERS
  Sofinov Societe Financiere d'Innovation, Inc.
    (14)............................................                      7,466,905         20.47%
  Visteon Corporation (15)..........................                     11,091,350         27.18%
  G.D.F. International (16).........................                      2,050,000          6.59%
  Leonard Greiner (17)..............................                      2,984,421          9.90%
DIRECTORS AND OFFICERS AS A GROUP (13 PERSONS)
  (18)..............................................                     26,158,221         51.74%
</TABLE>

--------------

*   Less than 1%

(1) Unless otherwise noted, the shareholders' address is 19300 Susana Road,
    Rancho Dominguez, California 90221.

(2) Owned jointly with Mr. Moard's spouse; includes 2,000 shares owned by
    Mr. Moard's minor children and 822,083 shares issuable upon exercise of
    options.

(3) Owned jointly with Mr. Burke's spouse; represents 500,000 shares issuable
    upon exercise of options.

(4) Owned jointly with Mr. Burford's spouse and includes 330,833 shares issuable
    upon exercise of options.

(5) Owned jointly with Mr. Frost's spouse and includes 330,833 shares issuable
    upon exercise of options.

(6) Owned jointly with Mr. Wood's spouse and includes 330,833 shares issuable
    upon exercise of options.

(7) Mr. Exbrayat is G.D.F. International's appointee to our board of directors
    and is deemed to have beneficial ownership of the shares owned by G.D.F.
    International. See Note 16 below. Also includes 5,000 shares issuable upon
    exercise of options.

(8) Owned jointly with Mr. Goffi's spouse; includes 12,000 shares issuable upon
    exercise of options and 2,000 shares owned by Mr. Goffi's descendants.

(9) Includes 5,000 shares owned by Zene Berg, Mr. Berg's mother and 12,000
    shares issuable upon exercise of options.

                                       54
<PAGE>
(10) Mr. Roch is Sofinov Societe Financiere d'Innovation, Inc.'s appointee to
    our board of directors and is deemed to be a beneficial owner of the shares
    owned by Sofinov. See Note 14 below. Also includes 12,000 shares issuable
    upon exercise of options.

(11) Mr. Saillant is Visteon Corporation's appointee to our board of directors
    and is deemed to be a beneficial owner of the shares owned by Visteon. See
    Note 15 below. Also includes 5,000 shares issuable upon exercise of options.

(12) Includes 12,000 shares issuable upon exercise of options.

(13) Includes 5,000 shares issuable upon exercise of options.

(14) The principal executive offices of Sofinov Societe Financiere d'Innovation,
    Inc. are located at 1981 Avenue McGill College, Montreal (Quebec) H3A 3C7.
    Includes an aggregate of 6,365,458 shares of our common stock to be issued
    and purchased in connection with the reorganization of our subsidiaries to
    consolidate our assets.

(15) The principal executive offices of Visteon Corporation are located at 5500
    Auto Club Drive, Dearbon, Michigan 48126. Includes 10,691,350 shares of
    common stock to be issued to Visteon immediately prior to the close of this
    offering, in exchange for Visteon's engineering services.

(16) The principal executive offices of G.D.F. International are located at 23
    rue Philibert Delorme, 75017 Paris, France. Includes 1,000,000 shares
    issuable upon exercise of warrants.

(17) Owned jointly with Mr. Greiner's spouse, includes 330,000 shares held by
    Mr. Greiner's children and in trusts for his grandchildren and 49,767 shares
    issuable upon exercise of options.

(18) Includes all shares set forth in Notes 2-13.

                                       55
<PAGE>
                          DESCRIPTION OF CAPITAL STOCK

GENERAL

    We are currently authorized to issue 30,000,000 shares of common stock, no
par value. Immediately prior to the completion of this offering, our authorized
capital stock will consist of 200,000,000 shares of common stock, no par value,
and 10,000,000 shares of preferred stock, no par value per share. The following
description of our securities and certain provisions of our amended and restated
articles of incorporation and amended and restated bylaws are summaries.
Statements contained in this prospectus relating to these provisions are not
necessarily complete. Copies of our amended and restated articles of
incorporation and amended and restated bylaws have been filed with the
Securities and Exchange Commission as exhibits to our registration statement, of
which this prospectus forms a part. The descriptions of common stock and
preferred stock reflect changes to our capital structure that will occur upon
the closing of this offering in accordance with the terms of the amended and
restated articles of incorporation that will be adopted by us immediately prior
to the closing of this offering.

COMMON STOCK

    As of August 30, 2000, there were 12,377,352 shares of common stock
outstanding and held of record by 93 shareholders. Based on the number of shares
of common stock outstanding as of that date and giving effect to the issuance of
4,862,158 shares of common stock and the sale of 2,178,000 shares of common
stock in connection with the reorganization of our subsidiaries to consolidate
our assets, the issuance of 1,000,000 shares of common stock upon exercise of
all outstanding warrants, the issuance of 10,691,350 shares of common stock in
exchange for Visteon's engineering services to us and the issuance of the
            shares of common stock offered by us hereby, there will be
shares of common stock outstanding, assuming no exercise of outstanding stock
options, after this offering.

    Holders of common stock are entitled to one vote for each share held on all
matters submitted to a vote of the shareholders. Cumulative voting for the
election of directors is not provided for in our articles of incorporation,
which means that the holders of a majority of the shares voted can elect all of
the directors then standing for election. Holders of common stock are entitled
to receive ratably any dividends that may be declared by our board of directors
out of legally available funds, subject to any preferential dividend rights of
any outstanding preferred stock. In the event of our liquidation, dissolution or
winding up, the holders of common stock are entitled to receive ratably our net
assets available after the payment of all debts and other liabilities, subject
to the prior rights of any outstanding preferred stock. Holders of common stock
have no preemptive, subscription, redemption or conversion rights. The
outstanding shares of common stock are, and the shares offered by us in this
offering will be upon receipt of payment for such shares, fully paid and
nonassessable. The rights, preferences and privileges of holders of common stock
are subject to, and may be adversely affected by, the rights of holders of
shares of any series of preferred stock which we may designate and issue in the
future without further shareholder approval. Upon the closing of the offering,
there will be no shares of preferred stock outstanding.

PREFERRED STOCK

    Upon completion of this offering and the amendment of our articles of
incorporation, our board of directors will be authorized without further
shareholder approval to issue from time to time up to an aggregate of
10,000,000 shares of preferred stock in one or more series and to fix or alter
the designations, preferences, rights, qualifications, limitations or
restrictions of the shares of each series, including the dividend rights,
dividend rates, conversion rights, voting rights, term of redemption including
sinking fund provisions, redemption price or prices, liquidation preferences and
the number

                                       56
<PAGE>
of shares constituting any series or designations of such series without further
vote or action by the shareholders. The issuance of preferred stock may have the
effect of delaying, deferring or preventing a change in control of our
management without further action by the shareholders and may adversely affect
the voting, dividend and other rights of the holders of common stock. The
issuance of preferred stock with voting and conversion rights may adversely
affect the voting power of the holders of common stock, including the loss of
voting control to others. We have no present plans to issue any shares of
preferred stock.

WARRANTS

    On July 13, 2000, we issued to G.D.F. International, a wholly owed
subsidiary of Gaz de France, a warrant to purchase 1,000,000 shares of our
common stock at an exercise price of $4.00 per share. This warrant may be
exercised all or in part through payment of the $4.00 per share cash exercise
price or through the application of a formula whereby G.D.F International would
receive a number of shares of our common stock based on the difference between
the $4.00 cash exercise price and the public offering price of the shares sold
in the offering. G.D.F. International's warrant expires on the date the
registration statement filed by us for this offering becomes effective. G.D.F.
International intends to exercise the warrant prior to its expiration.

RIGHT TO NOMINATE DIRECTORS

    Pursuant to the reorganization agreement entered into in September of 2000
with Sofinov and the seven individual members of Phoenix Gas Systems, LLC,
Sofinov will retain the right following the closing of this offering to nominate
for election one director to our board of directors so long as Sofinov holds our
unregistered securities and owns five percent or more of our outstanding
securities on a fully diluted basis.

REGISTRATION RIGHTS

    Pursuant to an agreement between us and Sofinov Societe Financiere
d'Innovation, Inc., Sofinov, who will hold 7,466,905 shares of common stock
following this offering, may demand that we file a registration statement under
the Securities Act, beginning 180 days after the closing of this offering, with
respect to the sale of up to 25% of its holdings and, beginning a year after the
closing of this offering, with respect to the sale of up to 100% of its
holdings. Additionally, following the closing of this offering, if we propose to
register in an underwritten public offering any of the shares of our common
stock under the Securities Act, either for our own account or for the account of
other security holders, Sofinov is entitled to notice of the registration and is
entitled to include its shares of our common stock in the registration under
certain conditions.

ANTI-TAKEOVER EFFECTS OF PROVISIONS OF OUR AMENDED AND RESTATED ARTICLES OF
  INCORPORATION AND AMENDED AND RESTATED BYLAWS

    Certain provisions of our amended and restated articles of incorporation and
amended and restated bylaws, which will become effective immediately prior to
the closing of this offering, may make it more difficult to acquire control of
us by various means. These provisions could deprive our shareholders of
opportunities to realize a premium on their shares of common stock. In addition,
these provisions may adversely affect the market price of the stock. These
provisions are intended to:

    - enhance the likelihood of continuity and stability in the composition of
      the board and in the policies formulated by our board of directors;

    - discourage certain types of transactions which may involve an actual or
      threatened change in control of us;

                                       57
<PAGE>
    - discourage certain tactics that may be used in proxy fights;

    - encourage persons seeking to acquire control of us to consult first with
      our board of directors to negotiate the terms of any proposed business
      combination or offer; and

    - reduce our vulnerability to an unsolicited proposal for a takeover that
      does not contemplate the acquisition of all of our outstanding shares of
      stock or that is otherwise unfair to our shareholders.

    CLASSIFIED BOARD OF DIRECTORS; REMOVAL; FILLING VACANCIES AND
AMENDMENT.  Our amended and restated articles and amended and restated bylaws
provide that upon the closing of this offering our board of directors shall be
divided into three classes of directors serving staggered, three-year terms. The
classification of the board has the effect of requiring at least two annual
shareholder meetings, instead of one, to replace a majority of members of our
board of directors. Subject to the rights of the holders of any outstanding
series of preferred stock, the articles authorize only our board of directors to
fill vacancies, including newly created directorships. Accordingly, this
provision could prevent a shareholder from obtaining majority representation on
our board of directors by enlarging our board of directors and filling the new
directorships with its own nominees. Our amended and restated articles also
provide that directors may be removed by shareholders only for cause and only by
the affirmative vote of holders of two-thirds of our outstanding shares of
voting stock.

    SHAREHOLDER ACTION; SPECIAL MEETING OF SHAREHOLDERS.  Our amended and
restated articles of incorporation provide that shareholders may not take action
by written consent, but may only take action at duly called annual or special
meetings of shareholders. Our amended and restated articles of incorporation
further provide that special meetings of our shareholders may be called only by
the chairman of our board of directors or a majority of our board of directors.
This limitation on the right of our shareholders to call a special meeting could
make it more difficult for our shareholders to initiate actions that are opposed
by our board of directors. These actions could include the removal of an
incumbent director or the election of a shareholder nominee as a director. They
could also include the implementation of a rule requiring shareholder
ratification of specific defensive strategies that have been adopted by the
board of directors with respect to unsolicited takeover bids. In addition, the
limited ability of the shareholders to call a special meeting of shareholders
may make it more difficult to change the existing board and management.

    ADVANCE NOTICE REQUIREMENTS FOR SHAREHOLDER PROPOSALS AND DIRECTOR
NOMINATIONS.  Our amended and restated bylaws provide that shareholders seeking
to bring business before an annual meeting of our shareholders, or to nominate
candidates for election as members of our board of directors at an annual
meeting of shareholders, must provide timely notice thereof in writing. The
amended and restated bylaws also provide that Sofinov will have the right to
nominate for election one member of our board of directors, subject to certain
requirements relating to Sofinov's ownership of our common stock. To be timely,
a shareholder's notice must be delivered to or mailed and received at our
principal executive offices not less than 60 days prior to the date of our
annual meeting. Our amended and restated bylaws also specify certain
requirements as to the form and content of a shareholder's notice. These
provisions may preclude our shareholders from bringing matters before an annual
meeting of shareholders or from making nominations for directors at an annual
meeting of shareholders.

    AUTHORIZED BUT UNISSUED SHARES.  The authorized but unissued shares of
common stock and preferred stock are available for future issuance without
shareholder approval. These additional shares may be utilized for a variety of
corporate purposes, including future public offerings to raise additional
capital, corporate acquisitions and employee benefit plans. The existence of
authorized but unissued shares of common stock and preferred stock could render
more difficult or discourage an attempt to obtain control of us by means of a
proxy contest, tender offer, merger or otherwise.

                                       58
<PAGE>
    SUPERMAJORITY VOTE TO AMEND ARTICLES AND BYLAWS.  The California General
Corporation Law provides generally that the affirmative vote of a majority of
the shares entitled to vote on any matter is required to amend a corporation's
articles of incorporation or bylaws, unless a corporation's articles of
incorporation or bylaws, as the case may be, requires a greater percentage. Our
amended and restated articles of incorporation impose supermajority vote
requirements in connection with business combination transactions and the
amendment of certain provisions of our amended and restated articles of
incorporation and amended and restated bylaws, including those provisions
relating to the classified board of directors, action by written consent, the
ability of shareholders to call special meetings and the ability of shareholders
to bring business before an annual meeting or to nominate directors. Following
the completion of this offering, our present directors and executive officers
and their respective affiliates will beneficially own approximately       % of
our common stock. This gives them veto power with respect to any shareholder
action or approval requiring either a two-thirds vote or a simple majority.

    STOCK OPTION PLAN.  Our 2000 Stock Incentive Plan provides for assumption of
our plan or substitution of equivalent options of a successor corporation or,
alternatively, at the discretion of the board of directors, exercise of some or
all of the options, including those for non-vested shares, or acceleration of
vesting of shares issued pursuant to stock grants, upon a change of control of
the Company or similar event. These provisions in our 2000 Stock Incentive Plan
plan may have the effect of delaying, deterring or preventing a change of
control of us.

TRANSFER AGENT AND REGISTRAR

    The transfer agent and registrar for our common stock will be ChaseMellon
Shareholder Services.

NASDAQ NATIONAL MARKET LISTING

    We intend to apply to have our common stock approved for quotation on the
Nasdaq National Market under the trading symbol "HBTI".

                                REPURCHASE OFFER

    We have sold shares of common stock to certain of our employees, business
consultants and associates and to their friends and family members. Due to the
financial qualifications of some of these purchasers, the issuance of these
shares may not have complied with all of the requirements for an exemption from
the registration requirements of Section 5 of the Securities Act nor an
exemption from qualification under California securities laws. We intend to make
a repurchase offer with respect to these sales of stock as provided under the
California securities law.

    Beginning approximately 180 days after the date of this prospectus, we
intend to make an offer to repurchase these shares at their original purchase
price, plus interest at a statutory rate from the date of purchase by the
purchaser to the expiration of the repurchase offer, as provided by California
law. The purchase price for most of these shares was approximately $1.00 to
$2.00 per share. However, 24,000 of these shares were initially sold for $20.83
per share, although we subsequently issued additional shares to these purchasers
to reduce their effective purchase price to $2.00 per share. Subject to the
approval of the California Department of Corporations, the repurchase offer will
cover a total of approximately 919,294 shares. Based upon the number of shares
subject to the repurchase offer and their purchase price, and assuming that all
such shares are tendered in the repurchase offer, the cost to us would be
approximately $1,065,594, plus interest.

    The Securities Act does not expressly provide that a repurchase offer will
terminate a purchaser's right to rescind a sale of stock which was not
registered as required under the Securities Act and rescission rights under
federal law may apply to more purchasers than is generally provided under the
California law repurchase procedure. Accordingly, we may continue to be
contingently liable for the

                                       59
<PAGE>
purchase price of shares which were not issued in compliance with the Securities
Act or applicable state securities laws and that are not repurchased. While any
determination of the maximum amount of our potential liability for these sales
is based on the particular facts surrounding each sale, and therefore subject to
uncertainty, we believe that we could be liable for a total amount of up to
approximately $1,656,969, plus interest.

    As of the date of this prospectus, we are not aware of any rescission claims
against us.

                        SHARES ELIGIBLE FOR FUTURE SALE

    Future sales of substantial amounts of our common stock in the public market
could adversely affect the market price of the common stock offered hereby.

    Upon completion of the offering, we will have             shares of common
stock outstanding, assuming no exercise of options after August 30, 2000. Of
this amount, the             shares offered by this prospectus will be available
for immediate sale in the public market as of the date of this prospectus.
Approximately             additional shares will be available for sale in the
public market following the expiration of 180-day lock-up agreements with the
representatives of our underwriters, subject in some cases to compliance with
the volume and other limitations of the Commission's Rule 144. An additional
            shares will be available for sale in the public market 90 days
following the date of this prospectus, subject in some cases to compliance with
the volume and other limitations of the Commission's Rule 144, but which are
subject to lock-up agreements.

<TABLE>
<CAPTION>
                                        APPROXIMATE SHARES
                                        ELIGIBLE FOR FUTURE
DAYS AFTER THE DATE OF THIS PROSPECTUS  SALE                  COMMENT
--------------------------------------  -------------------   -------------------------------------
<S>                                     <C>                   <C>
                                                              Freely tradeable shares sold in the
                                                              offering and shares saleable under
                                                              Rule 144(k) that are not subject to
Upon Effectiveness...................                         180-day lock-up.

                                                              Shares saleable under Rule 144,
                                                              144(k) or 701 that are not subject to
90 Days..............................        --               180-day lock-up.

                                                              Lock-up released; shares saleable
                                                              under Rule 144, subject, in some
                                                              cases, to volume limitations, 144(k)
180 days.............................                         or 701.

                                                              Lock-up released; shares saleable
                                                              under Rule 144 subject to vesting
180 days.............................                         requirements and volume limitations.
</TABLE>

RULE 144

    In general, under Rule 144 as currently in effect, a person who has
beneficially owned shares, including shares attributable to such person, for at
least one year is entitled to sell within any three-month period commencing
90 days after the date of this prospectus a number of shares that does not
exceed the greater of:

    - 1% of the then outstanding shares of common stock, which will be equal to
      approximately shares immediately after the offering; or

                                       60
<PAGE>
    - the average weekly trading volume during the four calendar weeks preceding
      such sale, subject to the filing of a form 144 with respect to such sale.

    A person, or persons whose shares are aggregated, who is not deemed to have
been one of our affiliates at any time during the 90 days immediately preceding
the sale and who has beneficially owned his or her shares for at least two years
is entitled to sell such shares pursuant to Rule 144(k) without regard to the
limitations described above. Persons deemed to be affiliates must always sell
pursuant to Rule 144, even after the applicable holding periods have been
satisfied.

    We are unable to estimate the number of shares that will be sold under
Rule 144, since this will depend on the market price for our common stock, the
personal circumstances of the sellers and other factors. Prior to the offering,
there has been no public market for the common stock, and there can be no
assurance that a significant public market for the common stock will develop or
be sustained after the offering. Any future sale of substantial amounts of the
common stock in the open market may adversely affect the market price of the
common stock offered hereby.

LOCK-UP AGREEMENTS

    We and our officers, directors and major shareholders have agreed that, for
a period of 180 days from the date of this prospectus, we will not, without the
prior written consent of Salomon Smith Barney Inc., dispose of or hedge any
shares of our common stock or any securities convertible into, or exercisable or
exchangeable for, our common stock. Salomon Smith Barney Inc., in its sole
discretion, may release any of the securities subject to these lock-up
agreements at any time without notice.

RULE 701

    Any of our employees or consultants who purchased his or her shares pursuant
to a written compensatory plan or contract is entitled to rely on the resale
provisions of Rule 701, which permits nonaffiliates to sell their Rule 701
shares without having to comply with the public information, holding period,
volume limitation or notice provisions of Rule 144 and permits affiliates to
sell their Rule 701 shares without having to comply with the Rule 144 holding
period restrictions, in each case commencing 90 days after the date of this
prospectus.

REGISTRATION RIGHTS

    After this offering, Sofinov will be entitled to certain rights with respect
to registration of its shares of our common stock under the Securities Act. See
"Description of Capital Stock--Registration Rights." After the sale of these
shares pursuant to a registration statement, such shares will be freely
tradeable without restriction under the Securities Act. These sales could cause
our market price to decline.

STOCK PLANS

    We intend to file a registration statement on Form S-8 under the Securities
Act shortly after the completion of the offering to register the shares of
common stock issuable under our 2000 Stock Incentive Plan, thus permitting the
resale of such shares by nonaffiliates in the public market without restriction
under the Securities Act. As of August 30, 2000, there were outstanding options
to purchase approximately 504,599 shares of common stock under our 2000 Stock
Incentive Plan.

                                       61
<PAGE>
                                  UNDERWRITING

    Subject to the terms and conditions stated in the underwriting agreement
dated the date hereof, each underwriter named below has severally agreed to
purchase, and we have agreed to sell to each underwriter, the number of shares
set forth opposite the name of that underwriter.

<TABLE>
<CAPTION>
UNDERWRITERS                                                  NUMBER OF SHARES
------------                                                  ----------------
<S>                                                           <C>
    Salomon Smith Barney Inc................................
    CIBC World Markets Corp.................................
    Lehman Brothers Inc.....................................
                                                                  -------
        Total...............................................
                                                                  =======
</TABLE>

    The underwriting agreement provides that the obligations of the several
underwriters to purchase the shares included in this offering are subject to the
approval of particular legal matters by the underwriters' counsel and to other
conditions. The underwriters are obligated to purchase all the shares, other
than those covered by their over-allotment option described below, if they
purchase any of the shares.

    The underwriters, for whom Salomon Smith Barney Inc., CIBC World Markets
Corp. and Lehman Brothers Inc. are acting as representatives, propose to offer
some of the shares directly to the public at the public offering price set forth
on the cover page of this prospectus and some of the shares to dealers at the
public offering price less a concession not in excess of $            per share.
The underwriters may allow, and dealers may reallow, a concession not in excess
of $            per share on sales to other dealers. If all the shares are not
sold at the initial offering price, the underwriters may change the public
offering price and other selling terms. The representatives have advised us that
the underwriters do not intend to confirm any sales to any accounts over which
they exercise discretionary authority.

    We have granted to the underwriters an option, exercisable for 30 days from
the date of this prospectus, to purchase up to       additional shares of our
common stock at the public offering price less the underwriting discount. The
underwriters may exercise this option solely for the purpose of covering
over-allotments, if any, in connection with this offering. To the extent this
option is exercised, each underwriter will be obligated, subject to specified
conditions, to purchase a number of additional shares approximately
proportionate to that underwriter's initial purchase commitment.

    At our request, the underwriters have reserved up to 3% of the shares of
common stock for sale at the initial public offering price to our directors,
officers and employees and other parties associated with us who have advised us
of their desire to purchase shares. The number of shares of common stock
available for sale to the general public will be reduced to the extent that
these individuals purchase reserved shares. Any reserved shares that are not
purchased through this directed share program will be offered by the
underwriters to the general public on the same basis as all other shares of
common stock offered by this prospectus. We have agreed to indemnify the
underwriters against certain liabilities and expenses, including liabilities
under the Securities Act, in connection with the sales of the directed shares.

    We and our officers, directors and major shareholders have agreed that, for
a period of 180 days from the date of this prospectus, we will not, without the
prior written consent of Salomon Smith Barney Inc., dispose of or hedge any
shares of our common stock or any securities convertible into, or exercisable or
exchangeable for, our common stock. Salomon Smith Barney Inc., in its sole
discretion, may release any of the securities subject to these lock-up
agreements at any time without notice.

                                       62
<PAGE>
    Prior to this offering, there has been no public market for our common
stock. Consequently, the initial public offering price for the shares was
determined by negotiations among us and the underwriters. Among the factors
considered in determining the initial public offering price were:

    - our record of operations;

    - our current financial condition;

    - our future prospects;

    - our markets;

    - the economic conditions in and future prospects for the industry in which
      we compete;

    - our management; and

    - currently prevailing general conditions in the equity securities markets,
      including current market valuations of publicly traded companies
      considered comparable to us.

    The prices at which the shares will sell in the public market after this
offering may, however, be lower than the price at which they are sold by the
underwriters. Additionally, an active trading market in our common stock may not
develop and continue after this offering.

    We intend to apply to have our common stock included for quotation on the
Nasdaq National Market under the symbol "HBTI."

    The following table shows the underwriting discounts and commissions that we
will pay to the underwriters in connection with this offering. These amounts are
shown assuming both no exercise and full exercise of the underwriters' options
to purchase additional shares of common stock.

<TABLE>
<CAPTION>
                                                              NO EXERCISE   FULL EXERCISE
                                                              -----------   -------------
<S>                                                           <C>           <C>
Per Share...................................................    $              $

Total.......................................................    $              $
</TABLE>

    In connection with this offering, Salomon Smith Barney Inc., on behalf of
the underwriters, may purchase and sell shares of our common stock in the open
market. These transactions may include short sales, syndicate covering
transactions and stabilizing transactions. Short sales involve syndicate sales
of common stock in excess of the number of shares to be purchased by the
underwriters in the offering, which creates a syndicate short position.
"Covered" short sales are sales of shares made in an amount up to the number of
shares represented by the underwriters' over-allotment option. In determining
the source of shares to close out the covered short position, the underwriters
will consider, among other things, the price of the shares available for
purchase in the open market as compared to the price at which they may purchase
shares through the over-allotment option. Transactions to close out the covered
syndicate short involve either purchases of the common stock in the open market
after the distribution has been completed or the exercise of the over-allotment
option. The underwriters may also make "naked" short sales of shares in excess
of the over-allotment option. The underwriters must close out any naked short
position by purchasing shares of common stock in the open market. A naked short
position is more likely to be created if the underwriters are concerned that
there may be downward pressure on the price of the shares in the open market
after pricing that could adversely affect investors who purchase in the
offering. Stabilizing transactions consist of bids for or purchases of shares in
the open market while the offering is in progress.

    The underwriters may also impose a penalty bid. Penalty bids permit the
underwriters to reclaim a selling concession from a syndicate member when
Salomon Smith Barney Inc., in covering a syndicate short position or making a
stabilizing purchase, repurchases shares originally sold by that syndicate
member.

    Any of these activities may cause the price of the common stock to be higher
than it would otherwise be in the open market in the absence of these
transactions. Salomon Smith Barney Inc. may

                                       63
<PAGE>
effect these transactions on the Nasdaq National Market or in the
over-the-counter market, or otherwise, and may discontinue them at any time.

    We estimate that our total expenses of this offering, if commenced, will be
$      .

    We have agreed to indemnify the underwriters against specified liabilities,
including liabilities under the Security Act of 1933, or to contribute to
payments the underwriters may be required to make in respect of any of those
liabilities.

                                 LEGAL MATTERS

    The validity of the common stock offered hereby will be passed upon for us
by Manatt, Phelps & Phillips, LLP, Los Angeles, California. As of April 21,
2000, Donald W. Meaders, a partner of Manatt, Phelps & Phillips, LLP, owned
4,000 shares of our common stock. Certain legal matters will be passed upon for
the underwriters by Cravath, Swaine & Moore, New York, New York.

                                    EXPERTS

    The financial statements of Hydrogen Burner Technology, Inc. and
subsidiaries as of December 31, 1998 and 1999, and for each of the years in the
three-year period ended December 31, 1999, have been included herein and in the
registration statement in reliance upon the report of KPMG LLP, independent
certified public accountants, appearing elsewhere herein, and upon the authority
of said firm as experts in accounting and auditing.

                             AVAILABLE INFORMATION

    We have filed with the Securities and Exchange Commission a registration
statement on Form S-1, including exhibits and schedules, under the Securities
Act with respect to the shares of common stock to be sold in this offering. This
prospectus, which is part of the registration statement, does not contain all
the information included in the registration statement. For further information
with respect to us and the shares to be sold in the offering, reference is made
to the registration statement and the exhibits and schedules attached to the
registration statement. Statements contained in this prospectus as to the
contents of any contract, agreement or other document referred to are not
necessarily complete. If the contract or other document is filed as an exhibit
to the registration statement, each statement is qualified by the provisions of
that exhibit.

    In addition, we intend to file annual, quarterly and current reports, proxy
statements and other information with the Commission. You may read and copy all
or any portion of the registration statement or any reports, statements or other
information that we file at the Commission's public reference facilities in Room
1024, Judiciary Plaza, 450 Fifth Street, N.W., Washington, D.C. 20549, and at
the regional offices of the Commission at 7 World Trade Center, 13th Floor, New
York, New York 10048, and Citicorp Center, 500 West Madison Street, Suite 1400,
Chicago, Illinois 60661. You may also obtain copies of these materials from the
public reference facilities of the Commission, Room 1024, Judiciary Plaza, 450
Fifth Street, N.W., Washington, D.C. 20549, at prescribed rates. You may obtain
information on the operation of the public reference by calling the Commission
at 1-800-SEC-0330. The Commission maintains a Web site at http://www.sec.gov
that contains reports, proxy and information statements and other information we
have filed with the Commission.

                                       64
<PAGE>
                        HYDROGEN BURNER TECHNOLOGY, INC.
                                AND SUBSIDIARIES

                   INDEX TO CONSOLIDATED FINANCIAL STATEMENTS

<TABLE>
<CAPTION>
                                                                PAGE
                                                              --------
<S>                                                           <C>
Independent Auditors' Report................................    F-2
Consolidated Balance Sheets at December 31, 1998 and 1999
  (audited) and June 30, 2000 (unaudited)...................    F-3
Consolidated Statements of Operations for the years ended
  December 31, 1997, 1998 and 1999 (audited) and six months
  ended June 30, 1999 and 2000 (unaudited)..................    F-4
Consolidated Statements of Shareholders' Equity (Deficiency)
  for the years ended December 31, 1997, 1998 and 1999
  (audited) and six months ended June 30, 2000
  (unaudited)...............................................    F-5
Consolidated Statements of Cash Flows for the years ended
  December 31, 1997, 1998 and 1999 (audited) and six months
  ended June 30, 1999 and 2000 (unaudited)..................    F-6
Notes to Consolidated Financial Statements..................    F-7
</TABLE>

                                      F-1
<PAGE>
                          INDEPENDENT AUDITORS' REPORT

The Board of Directors
Hydrogen Burner Technology, Inc.:

    We have audited the accompanying consolidated financial statements of
Hydrogen Burner Technology, Inc. and subsidiaries as listed in the accompanying
index. These consolidated financial statements are the responsibility of the
Company's management. Our responsibility is to express an opinion on these
consolidated financial statements based on our audits.

    We conducted our audits in accordance with auditing standards generally
accepted in the United States of America. Those standards require that we plan
and perform the audit to obtain reasonable assurance about whether the financial
statements are free of material misstatement. An audit includes examining, on a
test basis, evidence supporting the amounts and disclosures in the financial
statements. An audit also includes assessing the accounting principles used and
significant estimates made by management, as well as evaluating the overall
financial statement presentation. We believe that our audits provide a
reasonable basis for our opinion.

    In our opinion, the consolidated financial statements referred to above
present fairly, in all material respects, the financial position of Hydrogen
Burner Technology, Inc. and subsidiaries as of December 31, 1998 and 1999 and
the results of their operations and their cash flows for each of the years in
the three-year period ended December 31, 1999 in conformity with accounting
principles generally accepted in the United States of America.

                                          KPMG LLP

Los Angeles, California
March 24, 2000, except for the
  first paragraph of note 6, which
  is as of June 30, 2000.

                                      F-2
<PAGE>
                        HYDROGEN BURNER TECHNOLOGY, INC.
                                AND SUBSIDIARIES

                          CONSOLIDATED BALANCE SHEETS

<TABLE>
<CAPTION>
                                                                DECEMBER 31
                                                         -------------------------    JUNE 30,
                                                            1998          1999          2000
                                                         -----------   -----------   -----------
                                                                                     (UNAUDITED)
<S>                                                      <C>           <C>           <C>
                        ASSETS
Current assets:
  Cash and cash equivalents............................  $   157,000       352,000     2,040,000
  Restricted cash equivalents..........................       50,000            --            --
  Trade accounts receivable............................      185,000       243,000        24,000
  Related party receivables............................           --       154,000       117,000
  Inventory............................................      643,000       550,000       917,000
  Prepaids and other current assets....................       99,000        82,000        84,000
                                                         -----------   -----------   -----------
    Total current assets...............................    1,134,000     1,381,000     3,182,000

Property and equipment, net (note 2)...................      171,000       175,000       288,000
Deposits and other assets..............................       98,000        20,000        73,000
Patents, net (note 4)..................................      134,000       111,000       119,000
                                                         -----------   -----------   -----------
                                                         $ 1,537,000     1,687,000     3,662,000
                                                         ===========   ===========   ===========
   LIABILITIES AND SHAREHOLDERS' EQUITY (DEFICIENCY)
Current liabilities:
  Accounts payable.....................................  $   377,000       319,000       204,000
  Accrued expenses.....................................      822,000       275,000       455,000
  Accrued interest (note 5)............................       37,000        68,000       101,000
  Lease payable (note 7)...............................        1,000        25,000        23,000
  Customer deposits....................................      103,000       103,000        35,000
  Convertible note payable (note 5)....................      500,000            --            --
  Loans and notes payable, current portion (note 5)....      150,000       170,000       249,000
  Deferred revenue.....................................      451,000            --            --
  Other current liability (note 11)....................           --     1,000,000     1,000,000
                                                         -----------   -----------   -----------
    Total current liabilities..........................    2,441,000     1,960,000     2,067,000

Lease payable (note 7).................................           --        41,000       126,000
Loans and notes payable, less current portion
  (note 5).............................................      341,000       657,000       500,000
                                                         -----------   -----------   -----------
    Total liabilities..................................    2,782,000     2,658,000     2,693,000
                                                         -----------   -----------   -----------
Minority interest (note 6).............................           --       114,000        94,000

Shareholders' equity (deficiency) (note 6):
  Common stock, no par value. Authorized 30,000,000
    shares; issued and outstanding 7,061,000,
    10,487,000 and 11,307,000 shares (net of notes
    receivable of $578,000, $153,000 and $153,000,
    respectively) at December 31, 1998 and 1999 and
    June 30, 2000, respectively........................    5,893,000     8,990,000    13,090,000
Accumulated deficit....................................   (7,138,000)  (10,075,000)  (12,215,000)
                                                         -----------   -----------   -----------
    Net shareholders' equity (deficiency)..............   (1,245,000)   (1,085,000)      875,000
                                                         -----------   -----------   -----------
Commitments, contingencies and subsequent event (notes
  7 and 11)............................................
                                                         -----------   -----------   -----------
                                                         $ 1,537,000     1,687,000     3,662,000
                                                         ===========   ===========   ===========
</TABLE>

          See accompanying notes to consolidated financial statements.

                                      F-3
<PAGE>
                        HYDROGEN BURNER TECHNOLOGY, INC.
                                AND SUBSIDIARIES

                     CONSOLIDATED STATEMENTS OF OPERATIONS

<TABLE>
<CAPTION>
                                            YEAR ENDED DECEMBER 31           SIX MONTHS ENDED JUNE 30
                                     -------------------------------------   -------------------------
                                        1997          1998         1999         1999          2000
                                     -----------   ----------   ----------   -----------   -----------
                                                                                    (UNAUDITED)
<S>                                  <C>           <C>          <C>          <C>           <C>
Revenues...........................  $   278,000      145,000    1,238,000      516,000        76,000
Cost of sales......................      179,000      192,000    1,106,000      507,000            --
                                     -----------   ----------   ----------   ----------    ----------
  Gross profit (loss)..............       99,000      (47,000)     132,000        9,000        76,000
Selling, general and administrative
  expenses.........................    1,906,000    1,782,000    2,216,000    1,114,000     1,700,000
Research and development expenses
  (note 8).........................      822,000    1,299,000    1,310,000      736,000       746,000
                                     -----------   ----------   ----------   ----------    ----------
  Loss from operations.............   (2,629,000)  (3,128,000)  (3,394,000)  (1,841,000)   (2,370,000)
Minority interest in net losses of
  subsidiaries.....................      763,000      793,000      487,000      349,000       261,000
Interest income (expense), net.....       20,000       91,000      (30,000)     (19,000)      (31,000)
                                     -----------   ----------   ----------   ----------    ----------
  Net loss.........................  $(1,846,000)  (2,244,000)  (2,937,000)  (1,511,000)   (2,140,000)
                                     ===========   ==========   ==========   ==========    ==========
</TABLE>

          See accompanying notes to consolidated financial statements.

                                      F-4
<PAGE>
                        HYDROGEN BURNER TECHNOLOGY, INC.
                                AND SUBSIDIARIES

  CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (DEFICIENCY) (NOTES 5 AND 6)

<TABLE>
<CAPTION>
                                                                                            NET
                                                    COMMON STOCK                       SHAREHOLDERS'
                                              ------------------------   ACCUMULATED      EQUITY
                                                SHARES       AMOUNT        DEFICIT     (DEFICIENCY)
                                              ----------   -----------   -----------   -------------
<S>                                           <C>          <C>           <C>           <C>
Balance at December 31, 1996................   5,924,000   $ 3,781,000    (3,048,000)      733,000
Issuance of common stock for cash
  consideration.............................      58,000       250,000            --       250,000
Equity in subsidiary's capital..............          --       340,000            --       340,000
Net loss....................................          --            --    (1,846,000)   (1,846,000)
                                              ----------   -----------   -----------    ----------
Balance at December 31, 1997................   5,982,000     4,371,000    (4,894,000)     (523,000)
Issuance of common stock for cash
  consideration.............................     507,000       950,000            --       950,000
Conversion of notes payable and accrued
  liabilities to common stock...............     572,000       572,000            --       572,000
Net loss....................................          --            --    (2,244,000)   (2,244,000)
                                              ----------   -----------   -----------    ----------
Balance at December 31, 1998................   7,061,000     5,893,000    (7,138,000)   (1,245,000)
Issuance of common stock for cash
  consideration.............................   2,190,000     1,808,000            --     1,808,000
Conversion of notes payable and accrued
  liabilities to common stock...............   1,236,000     1,289,000            --     1,289,000
Net loss....................................          --            --    (2,937,000)   (2,937,000)
                                              ----------   -----------   -----------    ----------
Balance at December 31, 1999................  10,487,000     8,990,000   (10,075,000)   (1,085,000)
Issuance of common stock for cash
  consideration (unaudited).................     814,000     4,069,000            --     4,069,000
Conversion of notes payable and accrued
  liabilities to common stock (unaudited)...       6,000        31,000            --        31,000
Net loss (unaudited)........................          --            --    (2,140,000)   (2,140,000)
                                              ----------   -----------   -----------    ----------
Balance at June 30, 2000 (unaudited)........  11,307,000   $13,090,000   (12,215,000)      875,000
                                              ==========   ===========   ===========    ==========
</TABLE>

          See accompanying notes to consolidated financial statements.

                                      F-5
<PAGE>
                        HYDROGEN BURNER TECHNOLOGY, INC.
                                AND SUBSIDIARIES

                     CONSOLIDATED STATEMENTS OF CASH FLOWS

<TABLE>
<CAPTION>
                                                                                                    SIX MONTHS ENDED
                                                                YEAR ENDED DECEMBER 31                   JUNE 30
                                                         -------------------------------------   -----------------------
                                                            1997          1998         1999         1999         2000
                                                         -----------   ----------   ----------   ----------   ----------
                                                                                                       (UNAUDITED)
<S>                                                      <C>           <C>          <C>          <C>          <C>
Cash flows from operating activities:
  Net loss.............................................  $(1,846,000)  (2,244,000)  (2,937,000)  (1,511,000)  (2,140,000)
                                                         -----------   ----------   ----------   ----------   ----------
  Adjustments to reconcile net loss to net cash used in
    operating activities:
    Depreciation and amortization......................       62,000       85,000      126,000       42,000       67,000
    Minority interest..................................     (763,000)    (793,000)    (487,000)    (349,000)    (261,000)
    Other current liability............................           --           --    1,000,000      300,000           --
    Changes in assets and liabilities:
      Trade accounts receivable........................      (76,000)     (49,000)     (58,000)    (189,000)     219,000
      Related party receivables........................           --           --     (154,000)          --       37,000
      Inventory........................................     (549,000)     189,000       93,000       96,000     (367,000)
      Prepaids and other current assets................      (25,000)    (153,000)      17,000       52,000       (2,000)
      Deposits and other assets........................       21,000           --       78,000       82,000      (53,000)
      Accounts payable, accrued expenses and accrued
        interest.......................................       57,000      274,000       99,000       98,000       98,000
      Customer deposits................................           --      103,000           --           --      (68,000)
      Deferred revenue.................................      127,000      141,000     (451,000)    (240,000)          --
                                                         -----------   ----------   ----------   ----------   ----------
        Total adjustments..............................   (1,146,000)    (203,000)     263,000     (108,000)    (330,000)
                                                         -----------   ----------   ----------   ----------   ----------
        Net cash used in operating activities..........   (2,992,000)  (2,447,000)  (2,674,000)  (1,619,000)  (2,470,000)
                                                         -----------   ----------   ----------   ----------   ----------
Cash flows from investing activities:
  Purchases of property and equipment..................      (64,000)     (15,000)     (42,000)     (16,000)     (38,000)
  Patents..............................................      (87,000)          --           --           --      (15,000)
                                                         -----------   ----------   ----------   ----------   ----------
        Net cash used in investing activities..........     (151,000)     (15,000)     (42,000)     (16,000)     (53,000)
                                                         -----------   ----------   ----------   ----------   ----------
Cash flows from financing activities:
  Proceeds from issuance of common stock...............      250,000      950,000    1,808,000    1,768,000    4,069,000
  Subsidiary's sale of minority members' interest......      500,000      526,000      602,000           --      241,000
  Proceeds (repayments) of loans payable...............      670,000      453,000      451,000      (75,000)     (47,000)
  Decrease (increase) in cash restricted for letter of
    credit.............................................           --      (50,000)      50,000       50,000           --
  Capital lease obligation payments....................       (3,000)      (3,000)          --           --      (52,000)
                                                         -----------   ----------   ----------   ----------   ----------
        Net cash provided by financing activities......    1,417,000    1,876,000    2,911,000    1,743,000    4,211,000
                                                         -----------   ----------   ----------   ----------   ----------
        Net increase (decrease) in cash and cash
          equivalents..................................   (1,726,000)    (586,000)     195,000      108,000    1,688,000
Cash and cash equivalents at beginning of period.......    2,469,000      743,000      157,000      157,000      352,000
                                                         -----------   ----------   ----------   ----------   ----------
Cash and cash equivalents at end of period.............  $   743,000      157,000      352,000      265,000    2,040,000
                                                         ===========   ==========   ==========   ==========   ==========
Cash paid during the period for:
  Interest.............................................  $    18,000       43,000        7,000           --        5,000
  Income taxes.........................................        2,000        3,000        2,000           --           --
                                                         ===========   ==========   ==========   ==========   ==========
</TABLE>

Noncash financing activities:

     During 1998, notes payable and accrued liabilities in the amount of
     $572,000 were converted to 572,000 shares of common stock.

     During 1999, notes payable and accrued liabilities in the amount of
     $1,289,000 were converted to 1,236,000 shares of common stock.

     During 1999, property and equipment amounting to $75,000 was financed under
     capital lease obligations.

     During the six months ended June 30, 1999, notes payable and accrued
     liabilities in the amount of $1,223,000 were converted to 1,223,000 shares
     of common stock.

     During the six months ended June 30, 2000, property and equipment amounting
     to $135,000 was financed under capital lease obligations.

     During the six months ended June 30, 2000, notes payable in the amount of
     $31,000 were converted to 6,000 shares of common stock.

          See accompanying notes to consolidated financial statements.

                                      F-6
<PAGE>
                        HYDROGEN BURNER TECHNOLOGY, INC.
                                AND SUBSIDIARIES

                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

                    DECEMBER 31, 1998 AND 1999 (AUDITED) AND
                           JUNE 30, 2000 (UNAUDITED)

(1) SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

(a) BACKGROUND

    Hydrogen Burner Technology, Inc. (the Company) was incorporated in 1992. The
Company is a leading designer and developer of hydrogen fuel processors for fuel
cell systems and industrial hydrogen generators that can be used in numerous
industrial manufacturing applications at hydrogen refueling stations for fuel
cell vehicles. The Company has developed and patented a unique method of
generating hydrogen from common fossil fuels known as the Under-Oxidized Burner
(UOB-TM-). Because fuel cells require hydrogen to produce electricity, the
efficient and cost effective production of hydrogen for fuel cells is critical
to the commercial introduction of fuel cell systems into the mass transportation
and stationary markets. The Company's goal is to be the leading provider of
hydrogen fuel processors by capitalizing on its patented UOB-TM- technology for
hydrogen production, a reforming process that is more efficient, lower in
emissions, lower in capital cost, safer and more reliable than other currently
available methods of producing hydrogen.

    The consolidated financial statements of the Company include the accounts of
its majority-owned subsidiaries, Phoenix Gas Systems LLC (a limited liability
company) (PGS) and Phoenix Hydrogen Systems LLC (a limited liability company)
(PHS). All significant intercompany transactions have been eliminated in
consolidation.

    In April 1996, the Company formed PGS to commercialize the technology as it
relates to the conventional hydrogen markets where hydrogen is used as a feed
stock to industrial products and processes. In August 1996, Sofinov Societe
Financiere d'Innovation, Inc. (Sofinov) purchased a 29.1% interest in PGS.
Sofinov's interest in PGS was 28.7% at December 31, 1999. At December 31, 1998
and 1999, the Company owned 66.7% and 66.9%, respectively, of PGS. The remaining
ownership of PGS is held by seven individual members.

    On August 7, 1996, the Company and Sofinov entered into an agreement
pursuant to which they formed PHS which is owned 70% by the Company and 30% by
Sofinov. PHS then purchased from the Company a worldwide, exclusive license to
make, use and sell in perpetuity the UOB-TM- technology and concurrently granted
to PGS a similar sublicense to the technology as it relates to the conventional
hydrogen markets described above.

    The Company has recorded the rights related to the UOB-TM- patents,
technology, trademarks and trade names granted to PHS in accordance with
generally accepted accounting principles, whereby the value of such rights is
based upon the historical-cost basis.

(b) CASH EQUIVALENTS

    For purposes of the statements of cash flows, cash equivalents include
certificates of deposit and all highly liquid instruments with original
maturities of three months or less which are not securing any corporate
obligations.

    At December 31, 1998, the Company had a standby letter of credit in the
amount of $50,000. The letter of credit was fully secured by a certificate of
deposit which expired March 28, 1999. The letter of

                                      F-7
<PAGE>
                        HYDROGEN BURNER TECHNOLOGY, INC.
                                AND SUBSIDIARIES

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

                    DECEMBER 31, 1998 AND 1999 (AUDITED) AND
                           JUNE 30, 2000 (UNAUDITED)

(1) SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)
credit expired July 15, 1999. During 1999, the Company satisfied the terms of
the letter of credit which unencumbered the related certificate of deposit.

(c) INVENTORY

    Inventory, consisting principally of partially completed underoxidized
burners and parts for the production of these machines, is valued at the lower
of cost or market (net realizable value) using the first-in, first-out (FIFO)
method.

(d) DEPRECIATION AND AMORTIZATION

    Depreciation is computed using the straight-line method over the estimated
useful lives of the assets (ranging from three to seven years). Leasehold
improvements are amortized on a straight-line basis over their estimated
economic useful life or the life of the lease, whichever is less.

(e) REVENUE RECOGNITION

    The Company records revenues from the sale of its products and from research
and development performed on behalf of other organizations. Revenues from
research and development activities are recorded using the percentage of
completion method of accounting. Revenue from product sales is recognized upon
shipment. The Company records billings and the related deferred revenue based on
established milestones agreed upon in the contracts with its customers. At
December 31, 1998 and 1999, deferred revenues were $436,000 and $0,
respectively.

(f) INCOME TAXES

    As a result of the investment in the Company by a foreign investor, the
Company terminated its S Corporation election and became a C Corporation. The
termination was effective April 6, 1999. The Company has not provided any
pro-forma income tax information as the Company has incurred net losses since
inception.

    The Company accounts for income taxes under the asset and liability method.
Deferred tax assets and liabilities are recognized for the future tax
consequences attributable to differences between the financial statement
carrying amounts of existing assets and liabilities and their respective tax
bases and operating loss and tax credit carryforwards. Deferred tax assets and
liabilities are measured using enacted tax rates expected to apply to taxable
income in the years in which those temporary differences are expected to be
recovered or settled. The effect on deferred tax assets and liabilities of a
change in tax rates is recognized in income in the period that includes the
enactment date.

(g) USE OF ESTIMATES

    Management of the Company has made a number of estimates and assumptions
relating to the reporting of assets and liabilities, and revenues and expenses
and the disclosure of contingent assets and liabilities to prepare these
financial statements in conformity with generally accepted accounting
principles. Actual results could differ from these estimates.

                                      F-8
<PAGE>
                        HYDROGEN BURNER TECHNOLOGY, INC.
                                AND SUBSIDIARIES

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

                    DECEMBER 31, 1998 AND 1999 (AUDITED) AND
                           JUNE 30, 2000 (UNAUDITED)

(1) SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)
(h) IMPAIRMENT OF LONG-LIVED ASSETS AND ASSETS HELD FOR SALE

    The Company reviews its long-lived assets and certain identifiable
intangibles for impairment whenever events or changes in circumstances indicate
that the carrying value of an asset may not be recoverable.

    Recoverability of assets to be held and used is measured by a comparison of
the carrying amount of an asset to future undiscounted operating cash flows
expected to be generated by the assets. If such assets are considered to be
impaired, the impairment to be recognized is measured by the amount by which the
carrying amount of the assets exceeds the fair value of the assets. Assets to be
disposed of are reported at the lower of the carrying amount or fair value, less
costs to sell. No impairment write-downs were recorded during the three-year
period ended December 31, 1999 and the six months ended June 30, 2000.

(i) STOCK SPLIT

    Effective September 25, 1998, the Company split its outstanding shares by
means of a stock dividend whereby each holder of common stock received 1.4
additional shares for each share held. All share data included in the Company's
consolidated financial statements have been retroactively restated to reflect
the stock split.

(j) STOCK COMPENSATION

    The Company has adopted Statement of Financial Accounting Standards (SFAS)
No. 123, ACCOUNTING FOR STOCK-BASED COMPENSATION (SFAS No. 123), and has elected
to measure compensation cost under Accounting Principles Board Opinion No. 25,
ACCOUNTING FOR STOCK ISSUED TO EMPLOYEES, and comply with the pro forma
disclosure requirements of SFAS No. 123, except for options and warrants granted
to nonemployees, which are recorded for under SFAS No. 123.

(k) COMPREHENSIVE INCOME

    On January 1, 1999, the Company adopted SFAS No. 130, REPORTING
COMPREHENSIVE INCOME. SFAS No. 130 establishes standards for reporting and
presentation of comprehensive income and its components in a full set of
financial statements. The statement requires only additional disclosures in the
financial statements; it does not affect the Company's financial position or
results of operations. The Company does not have any transactions or other
economic events that qualify as comprehensive income as defined under SFAS
No. 130. As such, net loss equaled comprehensive loss for each of the years in
the three-year period ended December 31, 1999 and the six months ended June 30,
2000.

(l) FAIR VALUE OF FINANCIAL INSTRUMENTS

    Cash and cash equivalents, accounts receivable, accounts payable and accrued
expenses are reflected in the consolidated financial statements at carrying
value, which approximates fair value due to the short-term nature of these
instruments. The carrying value of the Company's borrowings

                                      F-9
<PAGE>
                        HYDROGEN BURNER TECHNOLOGY, INC.
                                AND SUBSIDIARIES

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

                    DECEMBER 31, 1998 AND 1999 (AUDITED) AND
                           JUNE 30, 2000 (UNAUDITED)

(1) SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)
approximates the fair value based on the current rates available to the Company
for similar instruments.

(m) INTERIM FINANCIAL DATA

    The unaudited operating results have been prepared on the same basis as the
audited consolidated financial statements and, in the opinion of management,
include all adjustments (consisting of normal recurring accruals) necessary for
a fair presentation for the periods presented. The results of operations for the
six months ended June 30, 1999 and 2000 are not necessarily indicative of
results to be achieved for the full fiscal year. The unaudited financial
statements should be read in conjunction with the audited consolidated financial
statements presented for the three years ended December 31, 1999.

(n) RECENTLY ISSUED ACCOUNTING STANDARD

    On March 31, 2000, the Financial Accounting Standards Board issued FASB
Interpretation No. 44, ACCOUNTING FOR CERTAIN TRANSACTIONS INVOLVING STOCK
COMPENSATION--AND INTERPRETATION OF APB OPINION NO. 25 (FIN 44). This
interpretation provides guidance for issues that have arisen in applying APB
Opinion No. 25, ACCOUNTING FOR STOCK ISSUED TO EMPLOYEES. FIN 44 applies
prospectively to new awards, exchanges of awards in a business combination,
modifications to outstanding awards and changes in grantee status that occur on
or after July 1, 2000, except for the provisions related to repricings and the
definition of an employee which apply to awards issued after December 15, 1998.
The provisions related to modifications to fixed stock option awards to add a
reload feature are effective for awards modified after January 12, 2000. The new
interpretation is not expected to have a material impact upon the financial
statements.

(2) PROPERTY AND EQUIPMENT

    Property and equipment is summarized as follows:

<TABLE>
<CAPTION>
                                                                  DECEMBER 31
                                                              -------------------   JUNE 30,
                                                                1998       1999       2000
                                                              --------   --------   --------
<S>                                                           <C>        <C>        <C>
Software....................................................  $     --    60,000     65,000
Shop furniture, fixtures and equipment......................   120,000   138,000    248,000
Office furniture, fixtures and equipment, including
  leaseholds................................................   197,000   226,000    284,000
                                                              --------   -------    -------
                                                               317,000   424,000    597,000
Less accumulated depreciation and amortization..............   146,000   249,000    309,000
                                                              --------   -------    -------
                                                              $171,000   175,000    288,000
                                                              ========   =======    =======
</TABLE>

(3) LICENSE AGREEMENTS AND RELATED PARTY TRANSACTIONS

    The Company entered into a license agreement with PHS, a 70%-owned
subsidiary, as of August 7, 1996, pursuant to which the Company granted to PHS
in perpetuity, an exclusive, irrevocable

                                      F-10
<PAGE>
                        HYDROGEN BURNER TECHNOLOGY, INC.
                                AND SUBSIDIARIES

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

                    DECEMBER 31, 1998 AND 1999 (AUDITED) AND
                           JUNE 30, 2000 (UNAUDITED)

(3) LICENSE AGREEMENTS AND RELATED PARTY TRANSACTIONS (CONTINUED)
worldwide license to make, use, offer for sale, sell, sublicense and otherwise
exploit the licensed UOB-TM- patents, technology, trademarks and trade names.
PHS then sublicensed the UOB-TM-technology in perpetuity for the specific field
of use to PGS. The field of use is limited and confined to all conventional
hydrogen markets, including but not limited to, chemical, refinery, metals,
food, hydrogen peroxide, glass, electronics and all other uses where hydrogen is
not used as a fuel but instead as a feed stock to industrial products and
processes.

    As payment for the license, PHS paid $250,000 and signed a note payable to
the Company in the amount of $750,000. The note is payable at the earliest
occurrence of the aggregate sales of UOB-TM- systems made by PGS totaling
$22,000,000 and annual net profits of PGS of at least $3,500,000 using generally
accepted accounting principles. The note receivable has been eliminated in
consolidation.

    In addition to the note payable, the Company is to receive royalties
equivalent to 2% of the net selling price of any UOB-TM- system and its pro rata
share of any net royalty income paid to PHS. Minimal royalties were earned
during the years ended December 31, 1997, 1998 and 1999 and the six months ended
June 30, 2000. All royalties earned have been eliminated in consolidation.

    Certain officers of the Company are also officers of PGS and PHS. In
addition, the Company currently shares a facility with both PHS and PGS. Rent,
salaries and other expenses are allocated by management between the Company and
PGS based on their estimated usage.

(4) PATENTS

    The Company has capitalized certain costs associated with obtaining its
patents. The patents are being amortized over their estimated useful lives of
17 years.

(5) LOANS AND ADVANCES PAYABLE AND CONVERSION OF DEBT AND LIABILITIES

    During the year ended December 31, 1998, certain shareholders and others
converted $408,000 of their notes payable and $164,000 of accrued liabilities
into 572,000 shares of HBT's common stock.

    During the year ended December 31, 1999, certain shareholders and others
converted $615,000 (including a $500,000 convertible note payable) of notes
payable and $674,000 of accrued liabilities into 1,236,000 shares of the
Company's common stock.

    During 1999, the Company entered into an agreement with Gaz de France to
establish a marketing and strategic partnership with the Company. The agreement
dated, October 28, 1999, provides the Company a $500,000 advance for costs
associated with the development of on-site hydrogen systems based on the
Company's technology. Per the agreement, if the parties do not proceed in a
partnership agreement, the Company is to repay Gaz de France the $500,000
advance no later than the end of the third year following the date of the
agreement. The advance is classified as long term debt and accrues interest at
10%. The advance was converted to equity on July 13, 2000 (note 11).

    As of December 31, 1998 and 1999 and at June 30, 2000, the Company has
certain loans with shareholders aggregating $162,000, $157,000 and $80,000,
respectively, at an interest rate of 10% per annum. These loans and accrued
interest are to be paid out of the profits of the Company, pro rata

                                      F-11
<PAGE>
                        HYDROGEN BURNER TECHNOLOGY, INC.
                                AND SUBSIDIARIES

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

                    DECEMBER 31, 1998 AND 1999 (AUDITED) AND
                           JUNE 30, 2000 (UNAUDITED)

(5) LOANS AND ADVANCES PAYABLE AND CONVERSION OF DEBT AND LIABILITIES
(CONTINUED)
with other loans, before any dividends are paid to shareholders. The
shareholders have the option to convert the loans into common stock of the
Company at $1 per share. At December 31, 1999, these loans are classified as
long term as the repayments were contingent on the net earnings of the Company.
As of December 31, 1998 and 1999 and June 30, 2000, the related accrued interest
amounts to $43,000, $31,000 and $5,000, respectively. However, subsequent to
June 30, 2000, the Company elected to repay those loans.

    At December 31, 1998, the Company had a note payable, secured by office
equipment, in the amount of $6,000. This note was repaid in 1999.

    In 1993, the Company received a loan of $90,000 from Southern California Gas
Company (SoCal Gas) under which the Company will have to repay SoCal Gas
$180,000 as repayment for the loan when certain sales criteria are met. In the
event minimum sales are not met by the expiration of the loan agreement, the
Company shall repay to SoCal Gas all amounts paid by SoCal Gas to the Company
together with interest at the rate of 10% per annum. The loan was scheduled to
mature in June 1998, but was extended for two years, until June 15, 2000. As of
December 31, 1998 and 1999, the Company paid $7,000 and $11,000, respectively,
in connection with this loan. The balance remaining at December 31, 1998 and
1999 was $173,000 and $169,000, respectively. The loan was repaid on August 21,
2000.

(6) STOCK ISSUANCES

    During 1998, 507,000 shares of common stock were sold to various investors
for $950,000. During 1999, 2,190,000 shares of common stock were sold for cash
consideration to various investors for $1,808,000. During the six months ended
June 30, 2000, the Company sold 414,000 shares of the Company's common stock at
a price of $5 per share. On June 30, 2000, the Company sold 400,000 shares of
common stock to Visteon at a price of $5 per share. Additionally, during the six
months ended June 30, 2000, a note payable of $31,000 was converted to common
stock at a price of $5 per share.

    During 1996, common stock was issued to certain key employees in exchange
for promissory notes payable to the Company. Under the original terms, each of
three employees received 107,000 shares in exchange for promissory notes bearing
interest at 5% per annum. The notes contain provisions that principal and
interest amounts may be forgiven at the employee's discretion if certain other
terms are fulfilled. The employees may not transfer or sell the stock until the
related promissory note is repaid or forgiven. Until the note is repaid or
forgiven, the Company retains the right to repurchase the stock for the same
amount as originally sold if the employee voluntarily leaves the Company's
employment or is fired for misconduct.

    Additional stock was previously issued to one of the key employees discussed
above in 1996. The employee purchased 47,000 shares in exchange for a promissory
note at 5% per annum, interest payable beginning October 1, 1997. The note
contains provisions that principal and interest amounts may be forgiven at the
employee's discretion. During 1996, a total of 13,000 additional shares were
issued to the same key employee for assumption of certain liabilities of the
Company payable to a

                                      F-12
<PAGE>
                        HYDROGEN BURNER TECHNOLOGY, INC.
                                AND SUBSIDIARIES

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

                    DECEMBER 31, 1998 AND 1999 (AUDITED) AND
                           JUNE 30, 2000 (UNAUDITED)

(6) STOCK ISSUANCES (CONTINUED)
vendor of the Company. During 1998, the notes were amended to allow for the
total of the original shares issued of 367,000 and related notes receivable of
$578,000 (outstanding balance at December 31, 1998) to be canceled and new
shares along with new notes receivable amounting to 367,000 and $153,000
(outstanding balance at December 31, 1999), respectively, to be issued. Notes
receivable totaling $578,000, $153,000 and $153,000 at December 31, 1998, 1999
and June 30, 2000, respectively relating to the stock issuances described above
were netted against the common stock recorded on the date issued.

    During 1998, PGS raised $1,713,000 in additional members' equity (of which
$526,000 was raised from minority group interests) increasing the Company's
interest in PGS to 66.7%. During 1999, PGS raised $1,930,000 in additional
members' equity (of which $602,000 was raised from minority group interests)
increasing the Company's interest in PGS to 66.9%. During the six months ended
June 30, 2000, PGS raised $715,000 in additional members' equity (of which
$241,000 was raised from minority group interests).

(7) COMMITMENTS AND CONTINGENCIES

    The Company leases its corporate office and warehouse facilities under
operating leases which expire through April 2005. The Company also pays certain
expenses applicable to the property such as property taxes and insurance. The
Company also leases equipment under service agreements with monthly minimum
payments.

    The Company leases various equipment under long-term leases and has the
option to purchase the equipment for a nominal cost at the termination of the
lease. Included in property and equipment at June 30, 2000 are net assets
aggregating approximately $213,000 which are held under capital leases.

    Minimum lease commitments at December 31, 1999, inclusive of leases executed
through the date of this report, under all noncancelable leases are as follows:

<TABLE>
<CAPTION>
                                                              CAPITAL    OPERATING
                                                               LEASES      LEASES
                                                              --------   ----------
<S>                                                           <C>        <C>
Year ending December 31:
  2000......................................................  $ 44,000      299,000
  2001......................................................    54,000      327,000
  2002......................................................    52,000      315,000
  2003......................................................    26,000      340,000
  2004......................................................    26,000      349,000
  2005......................................................     1,000      118,000
                                                              --------   ----------
      Total minimum lease payments..........................   203,000   $1,748,000
                                                                         ==========
  Less amount representing interest.........................    41,000
                                                              --------
      Present value of net minimum lease commitments........  $162,000
                                                              ========
</TABLE>

                                      F-13
<PAGE>
                        HYDROGEN BURNER TECHNOLOGY, INC.
                                AND SUBSIDIARIES

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

                    DECEMBER 31, 1998 AND 1999 (AUDITED) AND
                           JUNE 30, 2000 (UNAUDITED)

(7) COMMITMENTS AND CONTINGENCIES (CONTINUED)
    Rent expense for the years ended December 31, 1997, 1998 and 1999 and the
six months ended June 30, 1999 and 2000 aggregated $82,000, $89,000, $92,000,
$48,000 and $99,000, respectively.

    The Company has entered into employment agreements with five members of
management which have various terms and conditions which generally have
three-year terms.

    The Company has sold shares of common stock to certain employees, business
consultants and associates and their friends and family members, and, due to the
financial qualification of some of these purchasers, such sales may not have
complied with all of the requirements for an exemption from the registration
requirements of various Federal and state securities laws. The Company intends
to make an offer to repurchase 919,294 shares at their original purchase price,
of approximately $1,065,594 in the aggregate, plus interest from the date of
purchase. While the determination of amounts is subject to uncertainty, the
Company believes it could be liable for a total amount up to approximately
$1,656,969.

(8) RESEARCH CONTRACTS

    The Company obtained two cost reimbursement research contracts with the
Department of Energy (DOE) during 1997: the "Gasoline" contract and the
"Stationary" contract. These contracts are summarized as follows:

    - Gasoline--The Company agreed to design, develop, demonstrate and deliver a
      fuel-flexible fuel processor subsystem capable of converting gasoline into
      a hydrogen (H2) rich gas stream that is compatible with the anode gas
      requirements of a polymer electrolyte membrane fuel cell. In addition, the
      Company agreed to investigate an advanced humidifier low-temperature shift
      reactor to attempt to achieve extremely low carbon monoxide (CO)
      concentration without the addition of downstream selective CO reduction
      hardware. This cooperative agreement is partially funded on a
      cost-reimbursement basis without fee or profit. The total estimated cost
      of the project is $2,253,000, of which the estimated cost to the DOE
      (i.e., reimbursement) is $1,690,000 and the estimated cost to the Company
      is $563,000.

    - Stationary--The Company and Acurex Environmental Corporation (AEC) agreed
      to study the application of a natural gas fueled, underoxidized burner
      (UOB-TM-) fuel processor (NGFP) in a polymer electrolyte membrane fuel
      cell system intended for stationary building applications. This study is
      intended to result in the design of an optimized NGFP subsystem based on a
      trade-off analysis. A plan is to be developed to verify subsystem concepts
      and qualify precommercial hardware with the greatest potential for
      commercial success and implementation. This cooperative agreement is
      partially funded on a cost-reimbursement basis without fee or profit. The
      total estimated cost of the project is $679,000, of which the estimated
      cost to the DOE (i.e., reimbursement) is $503,000 and the estimated cost
      to the Company is $176,000.

    During the years ended December 31, 1997, 1998 and 1999 and the six months
ended June 30, 1999 and 2000, the Company recorded $85,000, $1,057,000,
$956,000, $670,000 and $62,000, respectively, in cost reimbursements under these
contracts and incurred $113,000, $1,409,000, $770,000,

                                      F-14
<PAGE>
                        HYDROGEN BURNER TECHNOLOGY, INC.
                                AND SUBSIDIARIES

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

                    DECEMBER 31, 1998 AND 1999 (AUDITED) AND
                           JUNE 30, 2000 (UNAUDITED)

(8) RESEARCH CONTRACTS (CONTINUED)
$770,000 and $71,000, respectively, in research and development costs. The total
contract proceeds have been netted against the respective expenses and included
in research and development expense.

    The Company accrues for any projected losses as identified.

    In addition to the above contracts, the Company has entered into a research
and development arrangement with Gaz de France whereby this entity has performed
a variety of research and development activities on the Company's behalf that
have lead to the further development of the Company technology. Under this
arrangement, the value of the services has been estimated at $1.0 million. This
value has been recorded in the consolidated financial statements at
December 31, 1999 as research and development expense and a corresponding
current liability (note 11).

(9) INCOME TAXES

    Income tax expense for the year ended December 31, 1999 was all current and
consisted of the minimum state tax. For the periods prior to April 6, 1999, the
Company was an S Corporation and all tax attributes were allocated to the
respective shareholders.

    The components of deferred taxes are summarized as follows:

<TABLE>
<CAPTION>
                                                              DECEMBER 31,   JUNE 30,
                                                                  1999         2000
                                                              ------------   ---------
<S>                                                           <C>            <C>
Deferred tax assets:
  Cumulative basis adjustments from partnerships............   $1,652,000    1,652,000
  Net operating loss carryforwards..........................      938,000    1,621,000
  Research and development credit carryforwards.............      155,000      155,000
  Other.....................................................       13,000       13,000
                                                               ----------    ---------
                                                                2,758,000    3,441,000
  Less valuation allowance..................................    2,711,000    3,391,000
                                                               ----------    ---------
      Net deferred tax assets...............................       47,000       50,000
  Deferred tax liabilities--amortization....................      (47,000)     (50,000)
                                                               ----------    ---------
                                                               $       --           --
                                                               ==========    =========
</TABLE>

    As there exists significant uncertainty about the Company's ability to
recognize the benefits of the recorded deferred tax assets, management has
recorded a valuation allowance to offset all net deferred tax assets at
December 31, 1999 and June 30, 2000.

(10) STOCK OPTIONS AND WARRANTS

    On July 31, 1998, the Board of Directors adopted a resolution and the
Company issued nonstatutory stock options to purchase 1,285,000 shares of common
stock at an exercise price of $1 per share, representing the approximate fair
value of the common stock on the date issued. These options were immediately
exercisable and expire on July 30, 2005.

                                      F-15
<PAGE>
                        HYDROGEN BURNER TECHNOLOGY, INC.
                                AND SUBSIDIARIES

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

                    DECEMBER 31, 1998 AND 1999 (AUDITED) AND
                           JUNE 30, 2000 (UNAUDITED)

(10) STOCK OPTIONS AND WARRANTS (CONTINUED)
    On October 29, 1999, the Board of Directors approved and the Company granted
343,000 shares to purchase common stock at $5 per share, representing the
approximate fair value of the common stock on the date issued. These options are
immediately exercisable and expire on October 28, 2006.

    The Company adopted the 2000 Stock Incentive Plan (the Plan) on July 20,
2000. The Plan reserves 1,575,000 shares of common stock for grants to
employees, nonemployee directors and consultants. Grants permitted under the
Plan include incentive stock options (ISO), nonstatutory stock options and
shares of stock sold subject to forfeiture restrictions. The minimum exercise
price of ISOs granted under the Plan is 100% of the fair market value of the
stock on the date of grant, but also at least equal to 110% of the fair market
value in the case of ISOs granted to an employee who holds more than 10% of the
common stock. Options issued under the Plan vest generally over three years and
expire generally on the seventh anniversary of the date of grant.

    The Company's stock option activity is summarized as follows:

<TABLE>
<CAPTION>
                                                                            WEIGHTED-
                                                              NUMBER OF      AVERAGE
                                                               SHARES     EXERCISE PRICE
                                                              ---------   --------------
<S>                                                           <C>         <C>
Shares under option at December 31, 1997....................         --        $  --
Granted.....................................................  1,285,000         1.00
                                                              ---------        -----
Shares under option at December 31, 1998....................  1,285,000         1.00
Granted.....................................................    343,000         5.00
                                                              ---------        -----
Shares under option at December 31, 1999....................  1,628,000         1.84
Granted.....................................................  1,000,000         5.00
                                                              ---------        -----
Shares under option at June 30, 2000........................  2,628,000        $3.04
                                                              =========        =====
</TABLE>

    During the six months ended June 30, 2000, the Company granted options to
purchase 1,000,000 shares of the Company's common stock at an exercise price of
$5.00 per share, representing the approximate fair market value of the common
stock on the date issued. Of the total grant, options for 200,000 shares are
fully vested and exercisable up until the day before the Company's initial
public offering. An additional 100,000 shares are fully vested and are
exercisable within seven years from the May 15, 2000 date of grant. An
additional 200,000 shares will vest upon the completion of the Company's initial
public offering and 300,000 shares will vest in 100,000 share increments on each
subsequent anniversary of the May 15, 2000 date of grant, all exercisable over a
seven-year period. The remaining 200,000 shares will vest in the event the
Company's common stock maintains a certain average trading price following the
Company's initial public offering. Options that are contingent upon the
occurrence of future events will be subject to potential compensation expense in
the amount of the intrinsic difference between the exercise price and the fair
value of the stock at the measurement date.

    At June 30, 2000, the weighted-average remaining contractual life of
outstanding options was 5.3 years.

                                      F-16
<PAGE>
                        HYDROGEN BURNER TECHNOLOGY, INC.
                                AND SUBSIDIARIES

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

                    DECEMBER 31, 1998 AND 1999 (AUDITED) AND
                           JUNE 30, 2000 (UNAUDITED)

(10) STOCK OPTIONS AND WARRANTS (CONTINUED)
    The Company has adopted the disclosure-only provisions of Statement
No. 123. Accordingly, for the stock options granted to employees, no
compensation cost has been recognized in the accompanying consolidated
statements of operations because the exercise price equaled or exceeded the fair
value of the underlying common stock at the date of grant. Had compensation cost
for the Company's stock granted to employees been determined based upon the fair
value at the grant date for awards consistent with Statement No. 123, the
Company's reported and pro forma net loss for the years ended December 31, 1998
and 1999 would have been as follows:

<TABLE>
<CAPTION>
                                                                 1998        1999
                                                              ----------   ---------
<S>                                                           <C>          <C>
Net loss:
  As reported...............................................  $2,244,000   2,937,000
  Pro forma.................................................   3,075,000   3,350,000
                                                              ==========   =========
</TABLE>

    The effects of applying Statement No. 123 for pro forma disclosure purposes
may not be representative of the effects on reported net income or loss for
future years' disclosures.

    The fair value of common stock options is estimated at the date of grant
using a Black-Scholes option-pricing model with the following weighted-average
assumptions for the years ended December 31, 1998 and 1999: risk-free interest
rate of 5.49% and 4.32%, respectively; weighted-average expected life of the
option of 7 years; no expected volatility; and no expected dividends.

(11) STRATEGIC RELATIONSHIPS AND SUBSEQUENT EVENTS (UNAUDITED)

    On July 13, 2000, the Company entered into a five-year agreement with Gaz de
France, a natural gas supplier and distributor, whereby Gaz de France became the
exclusive European distributor of the Company's hydrogen generating systems for
industrial use and refueling stations. The agreement includes a minimum purchase
quota, which is agreed upon between the parties on an annual basis. In addition,
the Company plans to develop enhanced hydrogen generation systems and conduct
related research together with Gaz de France. Concurrent with this agreement,
the Company issued 1,040,000 shares of common stock for total consideration of
$5.2 million. The total consideration included cash of $3.7 million, the
forgiveness of $1.0 million in amounts due for research and development
performed by Gaz de France on behalf of the Company and forgiveness of $500,000
previously advanced under the October 28, 1999 agreement with Gaz de France. In
addition, the Company issued a warrant to purchase 1,000,000 shares of common
stock at $4 per share. The Company will allocate the equity proceeds to the
common stock and the related warrant based upon the relative fair value of the
instruments.

    On June 20, 2000, the Company entered into a letter of intent for an
exclusive engineering, development and manufacturing alliance with Visteon
Corporation with respect to the development and manufacture of its hydrogen fuel
processors for fuel cell systems. Visteon is the world's second largest

                                      F-17
<PAGE>
                        HYDROGEN BURNER TECHNOLOGY, INC.
                                AND SUBSIDIARIES

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

                    DECEMBER 31, 1998 AND 1999 (AUDITED) AND
                           JUNE 30, 2000 (UNAUDITED)

(11) STRATEGIC RELATIONSHIPS AND SUBSEQUENT EVENTS (UNAUDITED) (CONTINUED)
supplier of automotive systems, modules and components to global vehicle
manufacturers. Based on the letter of intent, the Company and Visteon intends to
enter into the following agreements:

    - ENGINEERING SERVICES AGREEMENT: Visteon will provide engineering, design
      and support services relating to our hydrogen fuel processors, including
      services related to the establishment of the Company's prototype facility.

    - JOINT DEVELOPMENT AGREEMENT: The Company will jointly design, own and
      exploit with Visteon proprietary technology and know-how related to the
      manufacture of its hydrogen fuel processors.

    - CONTRACT MANUFACTURING AGREEMENT: Visteon will manufacture substantially
      all of the Company's hydrogen fuel processors for fuel cell systems. Under
      this agreement, the Company will pay Visteon, for each fuel processor
      manufactured, an amount equal to Visteon's cost plus a pre-determined
      profit resulting in a reasonable gross profit margin.

    Upon the signing of the engineering services agreement, the Company will
issue 10,691,350 shares of common stock to Visteon which the Company will value
at approximately $53.5 million. The value, representing the fair value of the
common stock will be recorded as a reduction in shareholders' equity and this
amount will be amortized into operating expenses over the period that services
are provided under the agreement.

    In September of 2000, the Company is planning to file with the Securities
and Exchange Commission for an initial public offering (IPO) of its common
stock. Prior to the Company's filing, the Company entered into a reorganization
agreement with Sofinov and the seven individual members of PGS to merge the
Company's subsidiaries, PHS and PGS, into a new California corporation, named
Phoenix Hydrogen Systems, Inc. In this reorganization, the Company received
9,353,169 shares of common stock of Phoenix Hydrogen Systems, Inc., or
approximately 65.81% of the outstanding stock, Sofinov received 4,187,458
shares, or approximately 29.46% of the outstanding stock, and the seven
individuals received in the aggregate 674,700 shares, or approximately 4.73% of
the outstanding stock. The reorganization agreement further provides that, if
the Company commences a public offering of its common stock, Phoenix Hydrogen
Systems, Inc. will be merged into the Company and each outstanding share of
stock in Phoenix Hydrogen Systems, Inc. held by Sofinov and the seven
individuals will be converted into one share of the Company's common stock and
the Company's shares in Phoenix Hydrogen Systems, Inc. will be cancelled. In
addition, the reorganization agreement provides that, in the event of a public
offering of the Company's common stock, Sofinov will have the option to purchase
an additional 2,178,000 shares of the Company's common stock for $10,890,000 in
cash. As a result of these transactions, all of the rights, liabilities and
properties held by PHS and PGS, including the technology, will be transferred
and assigned to the Company by operation of law and the shareholders of Phoenix
Hydrogen Systems, Inc. will become the shareholders of the Company. The
reorganization transaction will be effective immediately prior to the closing of
the offering.

                                      F-18
<PAGE>
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------

                                          SHARES

                        HYDROGEN BURNER TECHNOLOGY, INC.

                                  COMMON STOCK

                                     [LOGO]

                                     ------

                              P R O S P E C T U S

                                         , 2000

                                   ---------

                              SALOMON SMITH BARNEY

                               CIBC WORLD MARKETS
                                LEHMAN BROTHERS

--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
<PAGE>
                                    PART II
                     INFORMATION NOT REQUIRED IN PROSPECTUS

ITEM 13. OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION

    The following table states the costs and expenses, other than the
underwriting discounts and commissions, payable by the registrant in connection
with the sale of the common stock being registered by this registration
statement. All amounts shown are estimates, except the Securities and Exchange
Commission registration fee, the NASD filing fee and the Nasdaq National Market
listing fee.

<TABLE>
<S>                                                           <C>
Securities and Exchange Commission registration fee.........   $ 30,360
NASD filing fee.............................................     12,000
Nasdaq National Market listing fee..........................
Blue Sky fees and expenses..................................
Printing and engraving expenses.............................
Legal fees and expenses.....................................
Accounting fees and expenses................................
Transfer Agent and Registrar fees...........................
Miscellaneous expenses......................................
                                                               --------
Total.......................................................   $
                                                               ========
</TABLE>

ITEM 14. INDEMNIFICATION OF DIRECTORS AND OFFICERS

    Section 317 of the California General Corporation Law authorizes a court to
award, or a corporation's board of directors to grant, indemnity to directors
and officers in terms sufficiently broad to permit such indemnification under
certain circumstances for liabilities (including reimbursement for expenses
incurred) arising under the Securities Act. Our Amended and Restated Articles of
Incorporation, to be filed and effective upon completion of this offering
(Exhibit 3.1 hereto), provide for indemnification of our directors and officers
to the maximum extent permitted by the California General Corporation Law, and
our amended and restated bylaws, to be effective upon completion of this
offering (Exhibit 3.2 hereto), provide for indemnification of our directors,
officers, employees and other agents to the maximum extent permitted by the
California General Corporation Law.

    In addition, the we have entered into Indemnification Agreements
(Exhibit 10.4 hereto) with our directors and officers containing provisions that
are in some respects broader than the specific indemnification provisions
contained in the California General Corporation Law. The Indemnification
Agreements may require us, among other things, to indemnify our directors and
officers against certain liabilities that may arise by reason of their status or
service as directors or officers (other than liabilities arising from willful
misconduct of a culpable nature), to advance their expenses incurred as a result
of any proceeding against them as to which they could be indemnified, and to
obtain directors' and officers' insurance if available on reasonable terms.

    We have obtained a policy of directors' and officers' liability insurance
that insures our directors and officers against the cost of defense, settlement
or payment of a judgment under certain circumstances. The policy is effective
through December of 2000.

    The underwriting agreement filed as Exhibit 1.1 to this registration
statement provides for indemnification by the underwriters of us and our
officers and directors for certain liabilities under the Securities Act, or
otherwise.

ITEM 15. RECENT SALES OF UNREGISTERED SECURITIES

    The following is a summary of transactions since August 1997 involving sales
of our securities that were not registered under the Securities Act.

                                      II-1
<PAGE>
    1.  In May and July of 1998, we sold an aggregate of 24,000 shares of our
common stock at a purchase price of $20.83 per share to four purchasers for an
aggregate purchase price of $500,000.

    2.  In September of 1998 we issued an aggregate of 3,523,016 shares of our
common stock to all stockholders of record as the result of a stock dividend of
1.4 shares of our common stock being paid on each outstanding share.

    3.  In December of 1998, the following transactions occurred:

       - We issued an aggregate of 100,000 shares of our common stock to two
         individuals in exchange for the conversion of a $100,000 loan owed by
         us to them;

       - We issued an aggregate of 23,277 shares of our common stock to
         Mr. Moard and his spouse in exchange for past services and the
         conversion of a debt owed to Mr. Moard by us;

       - Joseph Stell (and his spouse) received 63,149 shares of common stock in
         exchange for past legal services rendered;

       - Three individuals (including Mr. Greiner) received an aggregate of
         385,129 shares of common stock in exchange for the conversion of debts
         owed by us to such individuals; and

       - 450,000 shares of our common stock were acquired by nine purchasers,
         for an aggregate price of $450,000, or $1.00 per share.

    4.  In January of 1999, we issued 8,000 shares of common stock to Mr. Wedaa
in exchange for past services rendered and we sold 265,000 shares of our common
stock to nine purchasers at a purchase price of $1.00 per share.

    5.  In February of 1999, 110,000 shares of our common stock were acquired by
four purchasers at a purchase price of $1.00 per share.

    6.  In March of 1999, Mr. Moard received 287,000 shares of stock in exchange
for the cancellation of a note owed by our company to him.

    7.  In April of 1999, the following transactions occurred:

       - We sold 1,101,447 shares of our common stock to Sofinov Societe
         Financiere d'Innovation, Inc. for $1,101,447 in the form of $800,000 in
         cash and the cancellation of a $300,000 promissory note and the
         interest accrued thereon;

       - We sold an aggregate of 92,000 shares to two purchasers at a purchase
         price of $1.00 per share;

       - Mr. Woods (together with his spouse) and Mr. Greiner's Trust received
         25,000 and 353,125 shares of our common stock, respectively, in
         exchange for the conversion of debts owed by our company to them; and

       - Eight individuals (and in some cases together with their spouses)
         received an aggregate of 394,600 shares of our common stock as the
         result of an adjustment made to shares previously purchased by them at
         a price substantially above the then-current book value.

    8.  In May of 1999, we issued an aggregate of 275,000 shares of common stock
to three purchasers in consideration of $225,000 in cash and the conversion of a
$50,000 debt owed by our company.

    9.  In July of 1999, three individuals purchased 26,666 shares of our common
stock at $1.50 per share for an aggregate purchase price of $39,999.

    10.  In September of 1999, DCH Technology, Inc. received 13,000 shares of
our common stock valued at $5.00 per share in exchange for the cancellation of
our $65,000 debt to that company.

    11.  In November of 1999, we issued an aggregate of 500,000 shares of common
stock to Peter Susi and Mathewson Greene in cancellation of a $500,000 face
amount promissory note payable by Phoenix Gas Systems, LLC to Messrs. Susi and
Greene, and guaranteed by us.

                                      II-2
<PAGE>
    12.  In January of 2000, we sold 174,000 shares of our common stock to one
individual at a purchase price of $5.00 per share for an aggregate purchase
price of $870,000.

    13.  In March, April and May of 2000, we sold an aggregate of 2,240,000
shares or our common stock to seven investors at a purchase price of $5.00 per
share and we converted a $31,000 loan into 6,000 shares of our common stock.

    14.  In June of 2000, Visteon Corporation purchased 400,000 shares of our
common stock for $2 million in cash.

    15.  In July of 2000, G.D.F. International, a wholly owned subsidiary of Gaz
de France, purchased 1,050,000 shares of our common stock in exchange for
$3.7 million in cash and the cancellation of our outstanding debt to Gaz de
France in the amount of $1,550,000. In addition, we issued to G.D.F.
International a warrant to purchase 1,000,000 shares of our common stock
exercisable at $4.00 per share. Unless it is exercised, the warrant will expire
on the date this registration statement becomes effective. G.D.F. International
intends to exercise the warrant prior to its expiration.

    16.  Since August of 1997, we have granted options to purchase common stock
to our executive officers, employees and consultants. The following table sets
forth information regarding these grants.

<TABLE>
<CAPTION>
                                                              NUMBER OF   EXERCISE PRICE
                                                               SHARES       PER SHARE
                                                              ---------   --------------
<S>                                                           <C>         <C>
Fiscal Year 1998............................................  1,285,000        $1.00
Fiscal Year 1999............................................    343,000         5.00
Fiscal Year 2000............................................  1,991,651         5.00
Fiscal Year 2000*...........................................     78,750         5.50
</TABLE>

--------------

    *   Incentive Stock Options granted to Mr. Moard.

    There were no underwriters employed in connection with any of the
transactions set forth in this Item 15, except that CIBC Oppenheimer acted as a
private placement agent in connection with the transactions described in the
paragraphs numbered 13, 14 and 15, above.

    At the time that each of the securities transactions listed above occurred,
we believed that all of such sales and issuances were considered to be exempt
from registration under the Securities Act in reliance on Section 4(2) of the
Securities Act, or Regulation D promulgated thereunder, or Rule 701 promulgated
under Section 3(b) of the Securities Act, as transactions by an issuer not
involving a public offering or transactions under compensatory benefit plans and
contracts relating to compensation as provided under Rule 701. The recipients of
securities in each of these transactions represented their intention to acquire
the securities for investment only and not with a view to or for sale with any
distribution thereof, and appropriate legends were affixed to the share
certificates and instruments issued in these transactions. As set forth in the
prospectus contained in this registration statement, however, we intend to make
a rescission offer with respect to certain shares of our common stock issued
pursuant to certain sales as described in the section entitled "Repurchase
Offer".

ITEM 16. EXHIBITS AND FINANCIAL STATEMENT SCHEDULES

    (a)  Exhibits

<TABLE>
<CAPTION>
NUMBER                                          DESCRIPTION
------                  ------------------------------------------------------------
<C>                     <S>
            1.1*        Form of Underwriting Agreement.
            3.1*        Amended and Restated Articles of Incorporation.
            3.2*        Amended and Restated Bylaws.
            4.1*        Form of specimen common stock certificate.
</TABLE>

                                      II-3
<PAGE>

<TABLE>
<CAPTION>
NUMBER                                          DESCRIPTION
------                  ------------------------------------------------------------
<C>                     <S>
            4.2         See Exhibits 3.1 and 3.2 for provisions of our Articles of
                          Incorporation and Bylaws defining the rights of our
                          shareholders.
            5.1*        Opinion of Manatt, Phelps & Phillips, LLP, regarding
                          legality of the securities being issued.
           10.1*+       Hydrogen Burner Technology, Inc., Key Employee Contract with
                          Michael Burke dated May 15, 2000.
           10.2*+       Hydrogen Burner Technology, Inc., Key Employee Contract with
                          David M. Moard dated August 1, 2000.
           10.3*+       Hydrogen Burner Technology, Inc., Key Employee Contract with
                          Larry Frost dated August 1, 2000.
           10.4*+       Hydrogen Burner Technology, Inc., Key Employee Contract with
                          Hazen Burford dated August 1, 2000.
           10.5*+       Hydrogen Burner Technology, Inc., Key Employee Contract with
                          Larry Frost dated August 1, 2000.
           10.6*+       Form of Indemnity Agreement entered into by Registrant with
                          each of its executive officers and directors.
           10.7         Industrial/Commercial Lease between The Allan and Georgianna
                          Kolsky Trust and Hydrogen Burner Technology, Inc., dated
                          March 27, 1996.
           10.8         Amendment to Industrial/Commercial Lease between The Allan
                          and Georgianna Kolsky Trust and Hydrogen Burner
                          Technology, Inc., dated October 22, 1998.
           10.9         Amendment to Industrial/Commercial Lease between The Allan
                          and Georgianna Kolsky Trust and Hydrogen Burner
                          Technology, Inc., dated December 28, 1999.
           10.10        Industrial/Commercial Lease between The Bloom Family Trust
                          and Hydrogen Burner Technology, Inc., dated April 13,
                          2000.
           10.11*       Reorganization Agreement dated September 7, 2000, among
                          Sofinov, Societe Financiere d'Innovation, Inc., Hydrogen
                          Burner Technology, Inc., Sofical Investment Corp. I,
                          Phoenix Gas Systems, LLC, Phoenix Hydrogen Systems, LLC
                          and the individuals named therein.
           10.12        Common Stock and Warrant Purchase Agreement between Hydrogen
                          Burner Technology, Inc. and G.D.F. International dated
                          July 13, 2000.
           10.13        Warrant of Hydrogen Burner Technology, Inc. issued to G.D.F.
                          International on July 13, 2000.
           10.14        Distribution Agreement among Phoenix Gas Systems, LLC, Gaz
                          de France and Hydrogen Burner Technology, Inc., dated July
                          13, 2000.
           10.15*       Agreement between Visteon Corporation and Hydrogen Burner
                          Technology, Inc., dated September       , 2000.
           10.16        Stock Purchase Agreement between Visteon Corporation and
                          Hydrogen Burner Technology, Inc., dated June 30, 2000.
           10.17        Common Stock Purchase Agreement between Hydrogen Burner
                          Technology, Inc. and Dieter Bakic dated January 14, 2000.
           10.18        Equipment Purchase and Service Agreement between Air Liquide
                          Canada, Inc. and Phoenix Gas Systems, LLC dated June 26,
                          1997.
           10.19        Sales Agreement between DCH Technology, Inc. and Phoenix
                          Hydrogen Systems, LLC, dated January 15, 1997.
           10.20        Development Agreement between Engelhard Corporation and
                          Hydrogen Burner Technology, Inc., dated January 19, 1999.
           10.21        Agreement between H Power Corp. and Hydrogen Burner
                          Technology, Inc., dated December 7, 1994.
           10.22        Subcontractor Agreement between H Power Corp. and Hydrogen
                          Burner Technology, Inc., dated October 9, 1999.
           10.23+       Hydrogen Burner Technology, Inc. 401(k) Plan.
           10.24+       Hydrogen Burner Technology, Inc. 2000 Stock Incentive Plan.
           10.25*       Form of Stock Option Agreement and list of persons subject
                          to such agreement.
</TABLE>

                                      II-4
<PAGE>

<TABLE>
<CAPTION>
NUMBER                                          DESCRIPTION
------                  ------------------------------------------------------------
<C>                     <S>
           11           Statement of Computation of Earnings Per Share (this exhibit
                          is omitted because the information is shown in the
                          financial statements and the notes thereto).
           23.1         Consent of KPMG LLP.
           23.2         Consent of Manatt, Phelps & Phillips, LLP (contained in
                          Exhibit 5.1).
           24.1         Power of Attorney (contained in the signature page to this
                          registration statement).
           27.1         Financial Data Schedule.
</TABLE>

--------------

*   To be filed by amendment.

+   Management and/or compensation plan or agreement.

    (b)  Financial Statement Schedules.

None

    All financial statement schedules not listed are omitted because they are
inapplicable or the requested information is shown in the financial statements
of the registrant or in the related notes to the financial statements.

ITEM 17. UNDERTAKINGS

    The undersigned registrant hereby undertakes to provide to the underwriters
at the closing specified in the Underwriting Agreement, certificates in such
denominations and registered in such names as required by the underwriters to
permit prompt delivery to each purchaser.

    Insofar as indemnification for liabilities arising under the Securities Act
may be permitted to directors, officers and controlling persons of the
registrant pursuant to the foregoing provisions, or otherwise, the registrant
has been advised that in the opinion of the Securities and Exchange Commission
such indemnification is against public policy as expressed in the Securities
Act, and is therefore unenforceable. If a claim for indemnification against such
liabilities (other than the payment by the registrant of expenses incurred or
paid by a director, officer or controlling person of the registrant in the
successful defense of any action, suit or proceeding) is asserted by such
director, officer or controlling person in connection with the securities being
registered, the registrant will, unless in the opinion of its counsel the matter
has been settled by controlling precedent, submit to a court of appropriate
jurisdiction the question of whether such indemnification by it is against
public policy as expressed in the Securities Act, and will be governed by the
final adjudication of such issue.

    The undersigned registrant hereby undertakes that:

        (1)  for purposes of determining any liability under the Securities Act,
    the information omitted from the form of prospectus filed as part of this
    registration statement in reliance upon Rule 430A and contained in a form of
    prospectus filed by the registrant pursuant to Rule 424(b)(1) or (4) or
    497(h) under the Securities Act shall be deemed to be part of this
    registration statement as of the time it was declared effective; and

        (2)  for the purpose of determining any liability under the Securities
    Act, each post-effective amendment that contains a form of prospectus shall
    be deemed to be a new registration statement relating to the securities
    offered therein, and the offering of such securities at that time shall be
    deemed to be the initial bona fide offering thereof.

                                      II-5
<PAGE>
                                   SIGNATURES

    Pursuant to the requirements of the Securities Act of 1933, as amended, the
registrant has duly caused this Registration Statement to be signed on its
behalf by the undersigned, thereunto duly authorized, in the City of Rancho
Dominguez, State of California, on the 7th day of September, 2000.

<TABLE>
<S>                                                    <C>  <C>
                                                       Hydrogen Burner Technology, Inc.

                                                       By:              /s/ DAVID M. MOARD
                                                            -----------------------------------------
                                                                          David M. Moard
                                                              President and Chief Executive Officer
</TABLE>

                               POWER OF ATTORNEY

    KNOW ALL PERSONS BY THESE PRESENTS, that each person whose signature appears
below constitutes and appoints David M. Moard and Michael Burke, jointly and
severally, his attorneys-in-fact, each with the power of substitution and each
with power to act alone, for him in any and all capacities, to sign any
amendments to this registration statement (including post-effective amendments),
and any registration statement filed pursuant to Rule 462(b) under the
Securities Act, and to file the same, with exhibits thereto and other documents
in connection therewith, with the Securities and Exchange Commission, hereto
ratifying and confirming all that each of said attorneys-in-fact, or his
substitute or substitutes, may do or cause to be done by virtue hereof.

    Pursuant to the requirements of the Securities Act of 1933, as amended, this
registration statement has been signed by the following persons in the
capacities and on the dates indicated below:

<TABLE>
<CAPTION>
                      SIGNATURE                                   TITLE                    DATE
                      ---------                                   -----                    ----
<S>                                                    <C>                          <C>
                                                       President, Chief Executive
                 /s/ DAVID M. MOARD                        Officer and Director
     -------------------------------------------           (Principal Executive     September 7, 2000
                   David M. Moard                                Officer)

                  /s/ MICHAEL BURKE                      Chief Financial Officer
     -------------------------------------------           (Principal Financial     September 7, 2000
                    Michael Burke                                Officer)

                                                        Treasurer/Controller and
                   /s/ LARRY FROST                          Assistant Secretary
     -------------------------------------------           (Principal Accounting    September 7, 2000
                     Larry Frost                                 Officer)

                 /s/ ROGER SAILLANT
     -------------------------------------------                Director            September 7, 2000
                   Roger Saillant
</TABLE>

                                      II-6
<PAGE>

<TABLE>
<CAPTION>
                      SIGNATURE                                   TITLE                    DATE
                      ---------                                   -----                    ----
<S>                                                    <C>                          <C>
               /s/ JEAN-LOUIS EXBRAYAT
     -------------------------------------------                Director            September 7, 2000
                 Jean-Louis Exbrayat

               /s/ DR. JAMES N. GOFFI
     -------------------------------------------                Director            September 7, 2000
                 Dr. James N. Goffi

                /s/ DR. LARRY L. BERG
     -------------------------------------------                Director            September 7, 2000
                  Dr. Larry L. Berg

                    /s/ IVAN ROCH
     -------------------------------------------                Director            September 7, 2000
                      Ivan Roch

                   /s/ HENRY WEDAA
     -------------------------------------------                Director            September 7, 2000
                     Henry Wedaa

                /s/ FRED R. SEDDIQUI
     -------------------------------------------                Director            September 7, 2000
                  Fred R. Seddiqui

                  /s/ DAVID FREEMAN
     -------------------------------------------                Director            September 7, 2000
                    David Freeman
</TABLE>

                                      II-7
<PAGE>
                               INDEX TO EXHIBITS

<TABLE>
<CAPTION>
NUMBER                                          DESCRIPTION
------                  ------------------------------------------------------------
<C>                     <S>
            1.1*        Form of Underwriting Agreement.
            3.1*        Amended and Restated Articles of Incorporation.
            3.2*        Amended and Restated Bylaws.
            4.1*        Form of specimen common stock certificate.
            4.2         See Exhibits 3.1 and 3.2 for provisions of our Articles of
                          Incorporation and Bylaws defining the rights of our
                          shareholders.
            5.1*        Opinion of Manatt, Phelps & Phillips, LLP, regarding
                          legality of the securities being issued.
           10.1*+       Hydrogen Burner Technology, Inc., Key Employee Contract with
                          Michael Burke dated May 15, 2000.
           10.2*+       Hydrogen Burner Technology, Inc., Key Employee Contract with
                          David M. Moard dated August 1, 2000.
           10.3*+       Hydrogen Burner Technology, Inc., Key Employee Contract with
                          Larry Frost dated August 1, 2000.
           10.4*+       Hydrogen Burner Technology, Inc., Key Employee Contract with
                          Hazen Burford dated August 1, 2000.
           10.5*+       Hydrogen Burner Technology, Inc., Key Employee Contract with
                          Larry Frost dated August 1, 2000.
           10.6*+       Form of Indemnity Agreement entered into by Registrant with
                          each of its executive officers and directors.
           10.7         Industrial/Commercial Lease between The Allan and Georgianna
                          Kolsky Trust and Hydrogen Burner Technology, Inc., dated
                          March 27, 1996.
           10.8         Amendment to Industrial/Commercial Lease between The Allan
                          and Georgianna Kolsky Trust and Hydrogen Burner
                          Technology, Inc., dated October 22, 1998.
           10.9         Amendment to Industrial/Commercial Lease between The Allan
                          and Georgianna Kolsky Trust and Hydrogen Burner
                          Technology, Inc., dated December 28, 1999.
           10.10        Industrial/Commercial Lease between The Bloom Family Trust
                          and Hydrogen Burner Technology, Inc., dated April 13,
                          2000.
           10.11*       Reorganization Agreement dated September 7, 2000, among
                          Sofinov, Societe Financiere d'Innovation, Inc., Hydrogen
                          Burner Technology, Inc., Sofical Investment Corp. I,
                          Phoenix Gas Systems, LLC, Phoenix Hydrogen Systems, LLC
                          and the individuals named therein.
           10.12        Common Stock and Warrant Purchase Agreement between Hydrogen
                          Burner Technology, Inc. and G.D.F. International dated
                          July 13, 2000.
           10.13        Warrant of Hydrogen Burner Technology, Inc. issued to G.D.F.
                          International on July 13, 2000.
           10.14        Distribution Agreement among Phoenix Gas Systems, LLC, Gaz
                          de France and Hydrogen Burner Technology, Inc., dated July
                          13, 2000.
           10.15*       Agreement between Visteon Corporation and Hydrogen Burner
                          Technology, Inc., dated September       , 2000.
           10.16        Stock Purchase Agreement between Visteon Corporation and
                          Hydrogen Burner Technology, Inc., dated June 30, 2000.
           10.17        Common Stock Purchase Agreement between Hydrogen Burner
                          Technology, Inc. and Dieter Bakic dated January 14, 2000.
           10.18        Equipment Purchase and Service Agreement between Air Liquide
                          Canada, Inc. and Phoenix Gas Systems, LLC dated June 26,
                          1997.
           10.19        Sales Agreement between DCH Technology, Inc. and Phoenix
                          Hydrogen Systems, LLC, dated January 15, 1997.
           10.20        Development Agreement between Engelhard Corporation and
                          Hydrogen Burner Technology, Inc., dated January 19, 1999.
           10.21        Agreement between H Power Corp. and Hydrogen Burner
                          Technology, Inc., dated December 7, 1994.
</TABLE>

<PAGE>

<TABLE>
<CAPTION>
NUMBER                                          DESCRIPTION
------                  ------------------------------------------------------------
<C>                     <S>
           10.22        Subcontractor Agreement between H Power Corp. and Hydrogen
                          Burner Technology, Inc., dated October 9, 1999.
           10.23+       Hydrogen Burner Technology, Inc. 401(k) Plan.
           10.24+       Hydrogen Burner Technology, Inc. 2000 Stock Incentive Plan.
           10.25*       Form of Stock Option Agreement and list of persons subject
                          to such agreement.
           11           Statement of Computation of Earnings Per Share (this exhibit
                          is omitted because the information is shown in the
                          financial statements and the notes thereto).
           23.1         Consent of KPMG LLP.
           23.2         Consent of Manatt, Phelps & Phillips, LLP (contained in
                          Exhibit 5.1).
           24.1         Power of Attorney (contained in the signature page to this
                          registration statement).
           27.1         Financial Data Schedule.
</TABLE>

--------------

*   To be filed by amendment.

+   Management and/or compensation plan or agreement.