Document:

EXHIBIT 4.1

                            COMFORT SYSTEMS USA, INC.

                               2000 INCENTIVE PLAN

1.    PURPOSE

      The purpose of this Incentive Plan (the "Plan") is to advance the
interests of Comfort Systems USA, Inc. (the "Company") and its subsidiaries by
enhancing their ability to attract and retain employees and other persons or
entities who are in a position to make significant contributions to the success
of the Company and its subsidiaries through ownership of shares of the common
stock, no par value per share (the "Stock"), of the Company and cash incentives.

      The Plan is intended to accomplish these goals by enabling the Company to
grant awards in the form of Options, Restricted Stock Awards, or Performance
Awards (each as defined below), or combinations thereof (each, an "Award"), as
more fully described below.

2.    ADMINISTRATION

      The Plan will be administered by the Board of Directors of the Company
(the "Board"). The Board will have authority, not inconsistent with the express
provisions of the Plan and in addition to other authority granted under the
Plan, to (a) grant Awards at such time or times as it may choose; (b) determine
the size of each Award, including the number of shares of Stock, if any, subject
to the Award; (c) determine the type or types of each Award; (d) determine the
terms and conditions of each Award; (e) waive compliance by a holder of an Award
with any obligations to be performed by such holder under an Award and waive any
terms or conditions of an Award; (f) amend or cancel an existing Award in whole
or in part (and if an Award is canceled, grant another Award in its place on
such terms and conditions as the Board shall specify), except that the Board may
not, without the consent of the holder of an Award, take any action under this
clause with respect to such Award if such action would adversely affect the
rights of such holder; (g) prescribe the form or forms of instruments that are
required or deemed appropriate under the Plan, including any written notices and
elections required of Participants (as defined below), and change such forms
from time to time; (h) adopt, amend and rescind rules and regulations for the
administration of the Plan; and (i) interpret the Plan and decide any questions
and settle all controversies and disputes that may arise in connection with the
Plan. Such determinations and actions of the Board, and all other determinations
and actions of the Board made or taken under authority granted by any provision
of the Plan, will be conclusive and will bind all parties. Nothing in this
paragraph shall be construed as limiting the power of the Board to make
adjustments under Section 7.2 or Section 8.6.
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      The Board may, in its discretion, delegate some or all of its powers with
respect to the Plan to a committee (the "Committee"), in which event all
references (as appropriate) to the Board hereunder shall be deemed to refer to
the Committee. The Committee, if one is appointed, shall consist of at least two
directors. A majority of the members of the Committee shall constitute a quorum,
and all determinations of the Committee shall be made by a majority of its
members. On and after registration of the Stock under the Securities Exchange
Act of 1934 (the "1934 Act"), the Board shall delegate the power to select
directors and officers to receive awards under the Plan and the timing, pricing,
and amount of such awards to a committee, all members of which shall be
disinterested persons within the meaning of Rule 16b-3 under the 1934 Act and
"outside directors" within the meaning of section 162(m)(4)(c)(i) of the
Internal Revenue Code of 1986, as amended (the "Code").

3.    EFFECTIVE DATE AND TERM OF PLAN

      The Plan will become effective on the date on which it is approved by the
stockholders of the Company. Awards may be made prior to such stockholder
approval (but after Board adoption of the Plan) if made subject thereto. No
Award may be granted under the Plan after April 16, 2010, but Awards previously
granted may extend beyond that date.

4.    SHARES SUBJECT TO THE PLAN

      Subject to adjustment as provided in Section 8.6, the aggregate number of
shares of Stock that may be delivered pursuant to Awards granted under the Plan
shall not exceed 3,500,000. If any Award is forfeited or otherwise terminated
without the delivery of Stock, shares of Stock are surrendered or withheld from
any Award to satisfy any income tax withholding obligations, or if any Award
payable in Stock or cash is satisfied in cash rather than Stock, then the number
of shares of Stock covered by such terminated or forfeited Award or which are
equal to the number of shares surrendered, withheld or terminated or for which
cash was substituted will be available for future grants under this Plan

      Subject to Section 8.6(a), the maximum number of shares of Stock as to
which Options may be granted to any Participant in any one calendar year is
1,000,000, which limitation shall be construed and applied consistently with the
rules under Section 162(m) of the Code.

      Stock delivered under the Plan may be either authorized but unissued Stock
or previously issued Stock acquired by the Company and held in treasury. No
fractional shares of Stock will be delivered under the Plan.

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5.    ELIGIBILITY AND PARTICIPATION

      Each key employee of the Company or any of its subsidiaries (an
"Employee") and each other person or entity (including without limitation
non-Employee directors of the Company or a subsidiary of the Company) who, in
the opinion of the Board, is in a position to make a significant contribution to
the success of the Company or its subsidiaries, will be eligible to receive
Awards under the Plan (each such Employee, person or entity receiving an Award,
"a Participant"). A "subsidiary" for purposes of the Plan shall mean a
corporation in which the Company owns, directly or indirectly, stock possessing
50% or more of the total combined voting power of all classes of stock.

6.    TYPES OF AWARDS

      6.1.        OPTIONS

      (a) NATURE OF OPTIONS. The Board may grant Awards giving the recipient the
right on exercise thereof to purchase Stock (each, an "Option").

      Both "incentive stock options," as defined in Section 422(b) of the Code
(any Option intended to qualify as an incentive stock option under the Code
being hereinafter referred to as an "ISO"), and Options that are not ISOs, may
be granted under the Plan. ISOs shall be awarded only to Employees. An Option
awarded under the Plan shall be a non-ISO unless it is expressly designated as
an ISO at time of grant.

      (b) EXERCISE PRICE. The exercise price of an Option will be determined by
the Board subject to the following:

(i)   The exercise price of an ISO or an Option intended to qualify as
      performance based compensation under Section 162(m) of the Code shall not
      be less than 100% (110% in the case of an ISO granted to a ten-percent
      stockholder) of the fair market value of the Stock subject to the Option,
      determined as of the time the Option is granted. For this purpose, "fair
      market value" in the case of ISOs shall have the same meaning as it does
      in the provisions of the Code and the regulations thereunder applicable to
      ISOs; and "ten-percent stockholder" shall mean any participant who at the
      time of grant owns directly, or by reason of the attribution rules set
      forth in Section 424(d) of the Code is deemed to own, stock possessing
      more than 10% of the total combined voting power of all classes of stock
      of the Company or of any of its parent or subsidiary corporations.

(ii)  In no case may the exercise price paid for Stock which is part of an
      original issue of authorized Stock be less than the par value per share of
      the Stock.

      (c) DURATION OF OPTIONS. The latest date on which an Option may be
exercised will be the tenth anniversary (the fifth anniversary in the case of an
ISO granted to a ten-percent stockholder

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as defined in 6.1(b) above) of the day immediately preceding the date the Option
was granted, or such earlier date as may have been specified by the Board at the
time the Option was granted.

      (d) EXERCISE OF OPTIONS. An Option will become exercisable at such time or
times, and on such conditions, as the Board may specify. The Board may at any
time and from time to time accelerate the time at which all or any part of an
Option may be exercised. Any exercise of an Option must be in writing, signed by
the proper person and delivered or mailed to the Company, accompanied by (1) any
documents required by the Board and (2) payment in full in accordance with
paragraph (e) below for the number of shares for which the Option is exercised.

      (e) PAYMENT FOR STOCK. Stock purchased on exercise of an Option must be
paid for as follows: (1) in cash or by check (acceptable to the Company in
accordance with guidelines established for this purpose), bank draft or money
order payable to the order of the Company or (2) if so permitted by the Board at
or after the grant of the Option or by the instrument evidencing the Option, (i)
through the delivery of shares of Stock which have been held for at least six
months (unless the Board approves a shorter period) and which have a fair market
value equal to the exercise price, (ii) by delivery of an unconditional and
irrevocable undertaking by a broker to deliver promptly to the Company
sufficient funds to pay the exercise price, or (iii) by any combination of the
foregoing permissible forms of payment.

      (f) DISCRETIONARY PAYMENTS. If (i) the fair market value as reasonably
determined by the Board of shares of Stock subject to an Option exceeds the
exercise price of the Option at the time of its exercise and (ii) the person
exercising the Option so requests the Board in writing, the Board may in its
sole discretion cancel the Option and cause the Company to pay in cash or in
shares of Common Stock (at a price per share equal to the fair market value per
share) to the person exercising the Option an amount equal to the difference
between the fair market value of the Stock which would have been purchased
pursuant to the exercise (determined on the date the Option is canceled) and the
aggregate exercise price which would have been paid.

        6.2.        RESTRICTED STOCK.

      (a) RESTRICTED STOCK. Subject to the terms and provisions of the Plan, the
Board may grant shares of Stock or allow the purchase shares of Stock in such
amounts and upon such terms and conditions as the Board shall determine subject
to the restrictions, if any, described below ("Restricted Stock").

      (b) RESTRICTED STOCK AGREEMENT. The Board may require, as a condition to
an Award of Restricted Stock (a "Restricted Stock Award"), that a recipient of a
Restricted Stock Award enter into a restricted stock award agreement, setting
forth the terms and conditions of the Award or that the recipient execute other
instruments including, but not limited to, any stockholders agreement of the
Company (any instrument governing the Restricted Stock being a "Restricted Stock
Award Agreement"). In lieu of a Restricted Stock Award Agreement, the Board may
provide the terms and conditions of an Award in a notice to the Participant of
the Award, on the stock certificate

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representing the Restricted Stock, in the resolution approving the Award, or in
such other manner as it deems appropriate.

      (c) TRANSFERABILITY AND OTHER RESTRICTIONS. Except as otherwise provided
in this Section 6.2, the shares of Restricted Stock granted herein may not be
sold, transferred, pledged, assigned, or otherwise alienated or hypothecated
until the end of the applicable period or periods, if any, established by the
Board and the satisfaction of any other conditions or restrictions, if any,
established by the Board (such period during which a share of Restricted Stock
is subject to such restrictions and conditions is referred to as the "Restricted
Period"). Except as the Board may otherwise determine under Section 7.1 or
Section 7.2 or except as set forth in the Restricted Stock Award Agreement, if a
Participant dies or suffers a Status Change (as defined at Section 7.2(a)) for
any reason during the Restricted Period, the Company may purchase the shares of
Restricted Stock subject to such restrictions and conditions for the amount of
cash paid by the Participant for such shares; PROVIDED, that any shares of
Restricted Stock for which no cash was paid by the Participant shall be
automatically forfeited to the Company.

      During the Restricted Period, if any, with respect to any shares of
Restricted Stock, the Company shall have the right to retain in the Company's
possession the certificate or certificates representing such shares.

      (d) REMOVAL OF RESTRICTIONS. Except as otherwise provided in this Section
6.2 and subject to any other restrictions on transfer of the Restricted Stock,
including, but not limited to, those restrictions contained in any stockholders
agreement of the Company, a share of Restricted Stock covered by a Restricted
Stock Award shall become freely transferable by the Participant upon completion
of the Restricted Period, if any, including the passage of any applicable period
of time and satisfaction of any conditions to vesting. The Board, in its sole
discretion, shall have the right at any time immediately to waive all or any
part of the restrictions and conditions with regard to all or any part of the
shares held by any Participant.

      (e) VOTING RIGHTS, DIVIDENDS AND OTHER DISTRIBUTIONS. During the
Restricted Period, if any, Participants holding shares of Restricted Stock
granted hereunder may exercise full voting rights and shall receive all regular
cash dividends paid with respect to such shares. Except as the Board shall
otherwise determine, any other cash dividends and other distributions paid to
Participants with respect to shares of Restricted Stock, including any dividends
and distributions paid in shares, shall be subject to the same restrictions and
conditions as the shares of Restricted Stock with respect to which they were
paid.

      (f) OTHER AWARDS SETTLED WITH RESTRICTED STOCK. The Board may, at the time
any Award described in this Section 6 is granted, provide that any or all of the
Stock delivered pursuant to the Award will be Restricted Stock.

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      (g) NOTICE OF SECTION 83(B) ELECTION. Any Participant making an election
under Section 83(b) of the Code with respect to Restricted Stock must provide a
copy thereof to the Company within 10 days of filing such election with the
Internal Revenue Service.

      6.3.        PERFORMANCE AWARDS; PERFORMANCE GOALS.

      (a) NATURE OF PERFORMANCE AWARDS. A performance award entitles the
recipient to receive, without payment, an amount in cash or Stock or a
combination thereof (such form to be determined by the Board) following the
attainment of Performance Goals (as hereinafter defined) (a "Performance
Award"). Performance Goals may be related to personal performance, corporate
performance, departmental performance or any other category or combination of
categories of performance established by the Board. The Board will determine the
Performance Goals, the period or periods during which performance is to be
measured and all other terms and conditions applicable to the Award.

      (b) OTHER AWARDS SUBJECT TO PERFORMANCE CONDITION. The Board may, at the
time any Award described in this Section 6.3 is granted, impose the condition
(in addition to any conditions specified or authorized in this Section 6 or any
other provision of the Plan) that Performance Goals be met prior to the
Participant's realization of any payment or benefit under the Award. Any such
Award made subject to the achievement of Performance Goals (other than an
Option) shall be treated as a Performance Award for purposes of Section 6.3(c)
below.

      (c) LIMITATIONS AND SPECIAL RULES. In the case of any Performance Award
intended to qualify for the performance-based remuneration exception described
in Section 162(m)(4)(C) of the Code and the regulations thereunder (an "Exempt
Award"), the Board shall in writing preestablish specific Performance Goals. A
Performance Goal must be established prior to passage of 25% of the period of
time over which attainment of such goal is to be measured. "Performance Goal"
means criteria based upon any one or more of the following (on a consolidated,
divisional, subsidiary, line of business or geographical basis or any
combinations thereof): (i) sales; revenues; assets; expenses; earnings before or
after deduction for all or any portion of interest, taxes, depreciation or
amortization, whether or not on a continuing operations or an aggregate or per
share basis; return on equity, investment, capital or assets; inventory level or
turns; one or more operating ratios; borrowing levels, leverage ratios or credit
rating; market share; capital expenditures; cash flow; stock price; stockholder
return; or any combination of the foregoing; or (ii) acquisitions and
divestitures (in whole or in part); joint ventures and strategic alliances;
spin-offs, split-ups and the like; reorganizations; recapitalizations,
restructurings, financings (issuance of debt or equity) and refinancings; or
(iii) any combination of the foregoing. A Performance Goal and targets with
respect thereto determined by the Board need not be based upon an increase, a
positive or improved result or avoidance of loss. The maximum Exempt Award
payable to any Participant in respect of any such Performance Goal for any year
shall not exceed $2,500,000.

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<PAGE>
7.    EVENTS AFFECTING OUTSTANDING AWARDS

      7.1.        TERMINATION OF SERVICE

      If a Participant who is an Employee ceases to be an Employee for any
reason, or if there is a termination (other than by reason of death) of the
consulting, service or similar relationship in respect of which a non-Employee
Participant was granted an Award hereunder (such termination of the employment
or other relationship being hereinafter referred to as a "Status Change"), the
following will apply:

      (a) Except as otherwise determined by the Board, all Options held by the
Participant that were not exercisable immediately prior to the Status Change
shall terminate at the time of the Status Change. Any Options that were
exercisable immediately prior to the Status Change will continue to be
exercisable within the three month period following the Status Change (or such
longer period as the Board may determine), and shall thereupon terminate, unless
the Award provides by its terms for immediate termination in the event of a
Status Change (unless otherwise determined by the Board) or unless the Status
Change results from a discharge for cause (as determined by the Board) below) in
which case all Options shall terminate immediately. In no event, however, shall
an Option remain exercisable beyond the latest date on which it could have been
exercised without regard to this Section 7. For purposes of this paragraph, in
the case of a Participant who is an Employee, a Status Change shall not be
deemed to have resulted by reason of (i) a sick leave or other bona fide leave
of absence approved for purposes of the Plan by the Board, so long as the
Employee's right to reemployment is guaranteed either by statute or by contract,
or (ii) a transfer of employment between the Company and a subsidiary or between
subsidiaries, or to the employment of a corporation (or a parent or subsidiary
corporation of such corporation) issuing or assuming an option in a transaction
to which Section 424(a) of the Code applies.

      (b) Except as otherwise determined by the Board and provided in a
Restricted Stock Award Agreement, all Restricted Stock held by the Participant
at the time of the Status Change which remains subject to restrictions, if any,
pursuant to the Restricted Stock Award or Restricted Stock Award Agreement must
be transferred to the Company (and, in the event the certificates representing
such Restricted Stock are held by the Company, such Restricted Stock will be so
transferred without any further action by the Participant) in accordance with
Section 6.2(c) above.

      (c) Any payment or benefit under a Performance Award to which the
Participant was not irrevocably entitled prior to the Status Change will be
forfeited and the Award cancelled as of the date of such Status Change unless
otherwise determined either by the Board or the terms of the Performance Award
established at the time of grant.

      7.2.        CERTAIN CORPORATE TRANSACTIONS.

      Except as otherwise provided by the Committee at the time of grant, in the
event of a consolidation or merger in which the Company is not the surviving
corporation or which results in

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the acquisition of substantially all the Company's outstanding Stock by a single
person or entity or by a group of persons and/or entities acting in concert, or
in the event of the sale or transfer of substantially all the Company's assets
or a dissolution or liquidation of the Company (a "Covered Transaction"), the
following rules shall apply:

      (a)   Subject to paragraph (b) below, all outstanding Awards requiring
            exercise will cease to be exercisable, and all other Awards to the
            extent not fully vested (including Awards subject to conditions not
            yet satisfied or determined) will be forfeited, as of the effective
            time of the Covered Transaction, provided that the Committee may in
            its sole discretion, on or prior to the effective date of the
            covered transaction, (1) make any outstanding Option exercisable in
            full, (2) remove the restrictions from any Restricted Stock, (3)
            cause the Company to make any payment and provide any benefit under
            any Performance Award and (4) remove any performance or other
            conditions or restrictions on any Award; or

      (b)   With respect to an outstanding Award held by a participant who,
            following the Covered Transaction, will be employed by or otherwise
            providing services to an entity which is a surviving or acquiring
            entity in the covered transaction or an affiliate of such an entity,
            the Committee may at or prior to the effective time of the covered
            transaction, in its sole discretion and in lieu of the action
            described in paragraph (a) above, arrange to have such surviving or
            acquiring entity or affiliate assume any Award held by such
            participant outstanding hereunder or grant a replacement award
            which, in the judgment of the Committee, is substantially equivalent
            to any Award being replaced.

8.    GENERAL PROVISIONS

      8.1.        DOCUMENTATION OF AWARDS.

      Awards will be evidenced by such written instruments, if any, as may be
prescribed by the Board from time to time. Such instruments may be in the form
of agreements to be executed by both the Participant and the Company, or
certificates, letters or similar instruments, which need not be executed by the
Participant but acceptance of which will evidence agreement to the terms
thereof.

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      8.2.        RIGHTS AS A STOCKHOLDER, DIVIDEND EQUIVALENTS.

      Except as specifically provided by the Plan, the receipt of an Award will
not give a Participant rights as a stockholder; the Participant will obtain such
rights, subject to any limitations imposed by the Plan or the instrument
evidencing the Award, only upon the issuance of Stock. However, the Board may,
on such conditions as it deems appropriate, provide that a Participant will
receive a benefit in lieu of cash dividends that would have been payable on any
or all Stock subject to the Participant's Award had such Stock been outstanding.
Without limitation, the Board may provide for payment to the Participant of
amounts representing such dividends, either currently or in the future, or for
the investment of such amounts on behalf of the Participant.

      8.3.        CONDITIONS ON DELIVERY OF STOCK.

      The Company will not be obligated to deliver any shares of Stock pursuant
to the Plan or to remove any restriction from shares previously delivered under
the Plan (a) until all conditions of the Award have been satisfied or removed,
(b) until, in the opinion of the Company's counsel, all applicable federal and
state laws and regulations have been complied with, (c) if the outstanding Stock
is at the time listed on any stock exchange or The Nasdaq Stock Market, until
the shares to be delivered have been listed or authorized to be listed on such
exchange or market upon official notice of notice of issuance, and (d) until all
other legal matters in connection with the issuance and delivery of such shares
have been approved by the Company's counsel. If the sale of Stock has not been
registered under the Securities Act of 1933, as amended, the Company may
require, as a condition to exercise of the Award, such representations or
agreements as counsel for the Company may consider appropriate to avoid
violation of such Act and may require that the certificates evidencing such
Stock bear an appropriate legend restricting transfer.

      If an Award is exercised by the Participant's legal representative, the
Company will be under no obligation to deliver Stock pursuant to such exercise
until the Company is satisfied as to the authority of such representative.

      8.4.        TAX WITHHOLDING.

      The Company will withhold from any cash payment made pursuant to an Award
an amount sufficient to satisfy all federal, state and local withholding tax
requirements (the "withholding requirements").

      In the case of an Award pursuant to which Stock may be delivered, the
Board will have the right to require that the Participant or other appropriate
person remit to the Company an amount sufficient to satisfy the withholding
requirements, or make other arrangements satisfactory to the Board with regard
to such requirements, prior to the delivery of any Stock or removal of
restrictions thereon. If and to the extent that such withholding is required,
the Board may permit the Participant or such other person to elect at such time
and in such manner as the Board provides to have the Company hold back from the
shares to be delivered, or to deliver to the Company, Stock having a

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value calculated to satisfy the withholding requirement. The Board may make such
share withholding mandatory with respect to any Award at the time such Award is
made to a Participant.

      If at the time an ISO is exercised the Board determines that the Company
could be liable for withholding requirements with respect to the exercise or
with respect to a disposition of the Stock received upon exercise, the Board may
require as a condition of exercise that the person exercising the ISO agree (a)
to provide for withholding under the preceding paragraph of this Section 8.4, if
the Board determines that a withholding responsibility may arise in connection
with tax exercise, (b) to inform the Company promptly of any disposition (within
the meaning of Section 424(c) of the Code) of Stock received upon exercise, and
(c) to give such security as the Board deems adequate to meet the potential
liability of the Company for the withholding requirements and to augment such
security from time to time in any amount reasonably deemed necessary by the
Board to preserve the adequacy of such security.

      8.5.        TRANSFERABILITY OF AWARDS.

      Unless otherwise permitted by the Board, no Award may be transferred other
than by will or by the laws of descent and distribution.

      8.6.        ADJUSTMENTS IN THE EVENT OF CERTAIN TRANSACTIONS.

      (a) In the event of a stock dividend, stock split or combination of
shares, recapitalization or other change in the Company's capitalization, or
other distribution to holders of Stock other than normal cash dividends, after
the effective date of the Plan, the Board will make any appropriate adjustments
to the maximum number of shares that may be delivered under the Plan under the
first paragraph of Section 4 above and to the limits described in the second
paragraph of Section 4 and in Section 6.3(c).

      (b) In any event referred to in paragraph (a), the Board will also make
any appropriate adjustments to the number and kind of shares of Stock or
securities subject to Awards then outstanding or subsequently granted, any
exercise prices relating to Awards and any other provision of Awards affected by
such change. The Board may also make such adjustments to take into account
material changes in law or in accounting practices or principles, mergers,
consolidations, acquisitions, dispositions or similar corporate transactions, or
any other event, if it is determined by the Board that adjustments are
appropriate to avoid distortion in the operation of the Plan; PROVIDED, that
adjustments pursuant to this sentence shall not be made to the extent it would
cause any Award intended to be exempt under Section 162(m)(4)(c) of the Code to
fail to be so exempt.

      (c) In the case of ISOs, the adjustments described in (a) and (b) above
will be made only to the extent consistent with continued qualification of the
Option under Section 422 of the Code (in the case of an ISO) or Section 162(m)
of the Code.

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      8.7.        EMPLOYMENT RIGHTS, ETC.

      Neither the adoption of the Plan nor the grant of Awards will confer upon
any person any right to continued retention by the Company or any subsidiary as
an Employee or otherwise, or affect in any way the right of the Company or
subsidiary to terminate an employment, service or similar relationship at any
time. Except as specifically provided by the Board in any particular case, the
loss of existing or potential profit in Awards granted under the Plan will not
constitute an element of damages in the event of termination of an employment,
service or similar relationship even if the termination is in violation of an
obligation of the Company to the Participant.

      8.8.        DEFERRAL OF PAYMENTS.

      The Board may agree at any time, upon request of the Participant, to defer
the date on which any payment under an Award will be made.

      8.9.        PAST SERVICES AS CONSIDERATION.

      Where a Participant purchases Stock under an Award for a price equal to
the par value of the Stock, the Board may determine that such price has been
satisfied by past services rendered by the Participant.

9.    EFFECT, AMENDMENT AND TERMINATION

      Neither adoption of the Plan nor the grant of Awards to a Participant will
affect the Company's right to grant to such Participant awards that are not
subject to the Plan, to issue to such Participant Stock as a bonus or otherwise,
or to adopt other plans or arrangements under which Stock may be issued to
Employees.

      The Board may at any time or times amend the Plan or any outstanding Award
for any purpose which may at the time be permitted by law, or may at any time
terminate the Plan as to any further grants of Awards, provided that no such
amendment shall materially impair any rights or materially increase any
obligations of the Participant under any Award theretofore made under the Plan
without the consent of the Participant, and provided further that (except to the
extent expressly required or permitted by the Plan) no such amendment will,
without the approval of the stockholders of the Company, effectuate a change for
which stockholder approval is required in order for the Plan to continue to
qualify for the award of ISOs under Section 422 of the Code or for the award of
performance-based compensation under Section 162(m) of the Code.

                                       11EXHIBIT 4.1

                                 OCTOBER 1, 1998
                            SUMMARY PLAN DESCRIPTION
                                       FOR
                      COMFORT SYSTEMS USA, INC. 401(K) PLAN

This is only a summary intended to familiarize you with the major provisions of
the Plan. You should read this summary closely. If you have any questions and
before you make any important decisions based on your understanding of the Plan
from this summary, you should contact the Plan administrator at the address
shown on the last page of this summary.
<PAGE>
                                 OCTOBER 1, 1998
                               BENEFITS HIGHLIGHTS
                                       FOR
                      COMFORT SYSTEMS USA, INC. 401(K) PLAN

INTRODUCTION

The Comfort Systems USA, Inc. 401(k) Plan helps you provide for your retirement
security by making it simple and convenient for you to contribute to your
retirement savings regularly. To encourage you to save, the Plan permits your
Employer to match a portion of what you contribute at the rate set forth in the
Plan. The Plan also permits your Employer to make contributions to the Plan to
provide you with additional savings. Because the Plan is qualified by the
Internal Revenue Service, special tax exclusions allow you to save more dollars
for your retirement.

Your savings are held for you in your personal Plan account until they are
distributed as provided under the Plan.

HOW YOU SAVE

*     You can contribute from one to 15 percent of your pay as Tax-Deferred
      Contributions.

*     For every $1.00 you contribute as Tax-Deferred Contributions while you are
      an eligible employee, your Employer may contribute on your behalf an
      amount it determines each year as matching Employer Contributions.

*     For each year that you are an eligible employee, your Employer may make
      contributions based on your pay as profit-sharing Employer Contributions.

*     For each year that you are an eligible employee, your Employer may make
      contributions on your behalf based on your pay as qualified non-elective
      Employer Contributions.

*     Dollars you save as Tax-Deferred Contributions are not currently included
      as part of your Federal taxable income. Taxes are also deferred on
      investment earnings in your personal Plan account and any Employer
      Contributions. You therefore pay no Federal income taxes on your Plan
      savings until they are distributed to you.

If you are a Highly Compensated Employee, your Employer will make no Qualified
Non-elective Employer Contributions on your behalf for the year. To find out if
you are a Highly Compensated Employee, check your Summary Plan Description.
<PAGE>
WHO IS COVERED

You are an employee covered by the Plan if you are employed in any capacity by
Comfort Systems USA, Inc., unless you are a union employee to whom coverage has
not been extended. You are not a covered employee if you are a nonresident alien
and do not receive United States source income.

If you were employed at the main corporate office of Comfort Systems USA, Inc.
on December 31, 1998, you became eligible to make contributions on January 1,
1999. Otherwise, if you are a covered employee, you may begin to make
contributions under the Plan if you have completed at least one year of service.

INVESTMENT OF YOUR PERSONAL PLAN ACCOUNT

You direct how your personal Plan account is invested. You may direct the
investment of your personal Plan account by selecting among specified Investment
Funds that are made available to you.

VESTING OF YOUR PERSONAL PLAN ACCOUNT

You will always be 100 percent vested in the value of your personal Plan account
resulting from your contributions.

Your vested interest in the value of your personal Plan account resulting from
Employer Contributions, other than qualified non-elective Employer
Contributions, will be determined in accordance with the following schedule:

      YEARS OF VESTING SERVICE            VESTED INTEREST

          Less than 1                             0%
          1 but less than 2                      20%
          2 but less than 3                      40%
          3 but less than 4                      60%
          4 but less than 5                      80%
          5 or more                             100%

You will always be 100 percent vested in the value of your personal Plan account
resulting from qualified non-elective Employer Contributions.
<PAGE>
You will be 100 percent vested in the value of your personal Plan account
resulting from Employer Contributions even if you have not completed the
required years of Vesting Service if you continue employment with your Employer
until:

*         You reach your Normal Retirement Date under the Plan.

*         You die.

*         You become totally and permanently disabled.

*         You reach age 55 and complete 5 years of Vesting Service.

Of course, even if you are 100 percent vested in the value of your personal Plan
account, the amount in your account may vary depending on investment gains and
losses.

LOANS

You may receive a loan from your personal Plan account in accordance with the
Plan loan procedures.

IN-SERVICE WITHDRAWALS

You may make a withdrawal from your vested personal Plan account while you are
still employed if you meet the requirements set forth in the Plan. The Plan
provisions control the amount you may withdraw. Because your savings under the
Plan are not currently taxable, special IRS tax rules govern in-service
withdrawals.

If you make an in-service withdrawal from your personal Plan account before age
59 1/2, your withdrawal may be subject to an additional 10 percent excise tax.

DISTRIBUTION OF BENEFITS

You may receive distribution of your vested personal Plan account when any of
the following happens:

*         You retire from employment after you reach your Normal Retirement
          Date, which is age 59-1/2.

*         You die.
<PAGE>
*         Your employment terminates.

*         You reach age 70 1/2 while you are still employed.

If distribution is made from your personal Plan account before you reach age 59
1/2 for any reason other than your death or termination of your employment after
you reach age 55, the distribution may be subject to an additional 10 percent
excise tax.

FURTHER PLAN INFORMATION

This Benefits Highlights is an introduction to some of the Plan's basic
features. It is not a full description of your benefits under the Plan or any
restrictions applicable to your benefits under the Plan. To determine your
rights to any particular benefits under the Plan, you should refer to the more
detailed information concerning the Plan contained in the Summary Plan
Description and in the Plan documents themselves. You can inspect a copy of the
complete Plan documents at the Human Resources Department of the Sponsor during
regular business hours.
<PAGE>
                                TABLE OF CONTENTS

INTRODUCTION.................................................................1
      CONTRIBUTIONS..........................................................1
      YOUR PLAN ACCOUNT......................................................1
      FORMAL PLAN TERMS FOUND IN PLAN DOCUMENT...............................2
      SPONSOR HAS DISCRETION TO INTERPRET PLAN...............................2

SPECIAL DEFINITIONS..........................................................3

SERVICE CREDITING............................................................7
      ELIGIBILITY SERVICE....................................................7
      CREDITING OF ELIGIBILITY SERVICE.......................................7
      VESTING SERVICE........................................................7
      CREDITING OF VESTING SERVICE...........................................7
      CHANGE IN SERVICE CREDITING............................................7

ELIGIBILITY..................................................................8
      HOW TO MAKE AN ELECTION................................................8
      TRANSFERS OF EMPLOYMENT................................................8
      REEMPLOYMENT...........................................................8

TAX-DEFERRED CONTRIBUTIONS...................................................9
      AMOUNT OF TAX-DEFERRED CONTRIBUTIONS...................................9
      CHANGE IN AMOUNT OF TAX-DEFERRED CONTRIBUTIONS.........................9
      SUSPENSION OF TAX-DEFERRED CONTRIBUTIONS...............................9
      RESUMPTION OF TAX-DEFERRED CONTRIBUTIONS..............................10
      VESTED INTEREST IN TAX-DEFERRED CONTRIBUTIONS.........................10

ROLLOVER CONTRIBUTIONS......................................................11
      ROLLOVER CONTRIBUTIONS................................................11
      VESTED INTEREST IN ROLLOVER CONTRIBUTIONS.............................11

EMPLOYER CONTRIBUTIONS......................................................12
      AMOUNT OF MATCHING CONTRIBUTIONS......................................12
      AMOUNT OF QUALIFIED NON-ELECTIVE EMPLOYER CONTRIBUTIONS...............12
      AMOUNT OF PROFIT-SHARING CONTRIBUTIONS................................12
      ELIGIBILITY TO PARTICIPATE IN EMPLOYER CONTRIBUTIONS..................12
      ANNUAL SERVICE REQUIREMENT............................................13
      REEMPLOYMENT..........................................................13
      VESTED INTEREST IN EMPLOYER CONTRIBUTIONS.............................13

                                      (i)
<PAGE>
LIMITATIONS ON CONTRIBUTIONS................................................15

WHERE PLAN CONTRIBUTIONS ARE INVESTED.......................................16
      404(C) PROTECTION.....................................................16

MAKING INVESTMENT ELECTIONS.................................................17
      INVESTMENT ELECTIONS..................................................17
      FAILURE TO DIRECT INVESTMENTS.........................................17
      CHANGE OF INVESTMENT ELECTIONS........................................17
      ELECTION TO TRANSFER BETWEEN INVESTMENT FUNDS.........................17

LOANS FROM YOUR PLAN ACCOUNT................................................19
      INTERNAL REVENUE CODE RULES...........................................19
      COLLATERAL FOR LOAN...................................................19
      DEFAULT ON A LOAN.....................................................20
      ADDITIONAL PLAN LOAN RULES............................................20

IN-SERVICE WITHDRAWALS......................................................21
      WITHDRAWAL OF PRIOR AFTER-TAX CONTRIBUTIONS...........................21
      WITHDRAWAL OF EMPLOYER CONTRIBUTIONS EXCEPT HARDSHIP WITHDRAWALS......21
      WITHDRAWAL OF TAX-DEFERRED CONTRIBUTIONS EXCEPT HARDSHIP WITHDRAWALS..21
      OVERALL CONDITIONS AND LIMITATIONS ON WITHDRAWALS EXCEPT HARDSHIP
            WITHDRAWALS.....................................................22
      HARDSHIP WITHDRAWALS..................................................22
      FINANCIAL NEEDS FOR WHICH HARDSHIP WITHDRAWALS ARE AVAILABLE..........22
      DEMONSTRATING NEED FOR HARDSHIP WITHDRAWAL............................23
      APPLICATION FOR HARDSHIP WITHDRAWALS..................................23

FORFEITURE OF NON-VESTED AMOUNTS............................................24
      TIMING OF FORFEITURE..................................................24
      RECREDITING OF FORFEITED AMOUNTS......................................24
      TREATMENT OF FORFEITED AMOUNTS........................................25

DISTRIBUTION OF YOUR PLAN ACCOUNT...........................................26
      TIMING OF DISTRIBUTION................................................26
      APPLICATION FOR DISTRIBUTION..........................................26
      SUSPENSION OF DISTRIBUTION............................................26
      DISTRIBUTION TO YOU...................................................26
      DISTRIBUTION TO YOUR BENEFICIARY......................................27
      CASH OUTS OF PLAN ACCOUNTS AND CONSENT TO DISTRIBUTION................27
      DIRECT ROLLOVER REQUIREMENTS..........................................27
      REQUIRED DISTRIBUTIONS................................................28

FORM OF PAYMENT.............................................................29

                                      (ii)
<PAGE>
      NORMAL FORM OF PAYMENT................................................29
      OPTIONAL FORMS OF PAYMENT.............................................29
      AUTOMATIC FORM OF ANNUITY PAYMENT.....................................29
      FORM OF PAYMENT TO YOUR BENEFICIARY...................................30
      QUALIFIED PRERETIREMENT SURVIVOR ANNUITY REQUIREMENTS.................30
      SPOUSAL CONSENT REQUIREMENTS..........................................30
      EFFECT OF REEMPLOYMENT ON FORM OF PAYMENT ELECTION....................31
      DISTRIBUTION IN EMPLOYER STOCK........................................31
      OVERRIDING CASH OUT PROVISION.........................................31

YOUR BENEFICIARY UNDER THE PLAN.............................................32
      BENEFICIARY IF YOU ARE MARRIED........................................32
      EFFECT OF ELECTION OF OPTIONAL ANNUITY FORM OF PAYMENT ON PRIOR
            BENEFICIARY DESIGNATION.........................................32
      EFFECT OF MARRIAGE ON PRIOR BENEFICIARY DESIGNATION...................32
      BENEFICIARY WHERE THERE IS NO DESIGNATED BENEFICIARY..................33
      SPOUSAL CONSENT TO BENEFICIARY DESIGNATION............................33

CLAIMS FOR BENEFITS.........................................................34

AMENDMENT AND TERMINATION OF THE PLAN.......................................35
      PLAN AMENDMENT........................................................35
      PLAN TERMINATION......................................................35

MISCELLANEOUS INFORMATION...................................................36
      PLAN BOOKLET DOES NOT CREATE EMPLOYMENT CONTRACT......................36
      NO GUARANTEES REGARDING INVESTMENT PERFORMANCE........................36
      IF CIRCUMSTANCES REQUIRE THE DELAY OF A WITHDRAWAL....................36
      TRANSFERS FROM THE GUARANTEED INCOME FUND MAY BE LIMITED..............36
      PAYMENT OF ADMINISTRATIVE EXPENSES....................................36
      QUALIFIED DOMESTIC RELATIONS ORDERS...................................37
      RETURN OF CONTRIBUTIONS TO YOUR EMPLOYER..............................37

TOP-HEAVY PROVISIONS........................................................38

MORE THINGS YOU SHOULD KNOW.................................................39

YOUR RIGHTS UNDER THE PLAN..................................................40

ADDITIONAL INFORMATION......................................................42
      PLAN ADMINISTRATOR....................................................42
      AGENT FOR SERVICE OF LEGAL PROCESS....................................42
      SPONSOR...............................................................42

                                     (iii)
<PAGE>
      EMPLOYER IDENTIFICATION NUMBER........................................42
      PLAN NUMBER...........................................................42
      TRUSTEE...............................................................42

                                      (iv)
<PAGE>
                                  INTRODUCTION

The Comfort Systems USA, Inc. 401(k) Plan helps you build financial security for
your retirement by providing you an opportunity to save for your retirement
while simultaneously reducing your Federal income tax liability (and in some
States, your State income tax liability as well).

This booklet describes the Plan as in effect on October 1, 1998.

CONTRIBUTIONS

You may contribute a portion of your COMPENSATION to the Plan on a before-tax
basis. These contributions are called TAX-DEFERRED CONTRIBUTIONS. This reduces
the amount of your taxable income for the year under the Federal income tax
rules.

Your TAX-DEFERRED CONTRIBUTIONS remain invested in the Plan until they are
distributed under the terms of the Plan. Your TAX-DEFERRED CONTRIBUTIONS, and
any earnings on your TAX-DEFERRED CONTRIBUTIONS, are not taxable under Federal
income tax rules until they are distributed to you from the Plan.

In addition to your contributions, the Plan permits your EMPLOYER to make
contributions to the Plan on your behalf. These contributions are called
EMPLOYER CONTRIBUTIONS. Like your TAX-DEFERRED CONTRIBUTIONS, these EMPLOYER
CONTRIBUTIONS, and the earnings on them, are not taxable to you until they are
distributed to you from the Plan.

Finally, you may elect to roll over qualified cash distributions from another
plan or a rollover IRA into the Plan. These contributions are called ROLLOVER
CONTRIBUTIONS. Like your TAX-DEFERRED CONTRIBUTIONS, these ROLLOVER
CONTRIBUTIONS, and the earnings on them, are not taxable to you until they are
distributed to you from the Plan.

YOUR PLAN ACCOUNT

You have your own account under the Plan to hold all contributions you make to
the Plan and any contributions your EMPLOYER makes to the Plan on your behalf.
Your Plan account also holds any investment earnings on those contributions.
Your Plan account keeps track of your share of the assets held in the Plan.
<PAGE>
FORMAL PLAN TERMS FOUND IN PLAN DOCUMENT

This booklet describes in easy-to-understand terms the principal features of the
Plan as in effect on October 1, 1998. Some technical details and legal
expressions contained in the formal Plan documents have been omitted. The formal
Plan documents govern in administering and interpreting the rights of
participants and their beneficiaries.

SPONSOR HAS DISCRETION TO INTERPRET PLAN

The SPONSOR has discretionary authority to interpret and construe the provisions
of the Plan, to determine your eligibility for benefits under the Plan, and to
resolve any disputes that arise under the Plan. The SPONSOR may delegate this
authority as provided under the Plan.

                                       2
<PAGE>
                               SPECIAL DEFINITIONS

To help you better understand how the Plan works, the following Plan terms have
the special meanings given in SPECIAL DEFINITIONS when they are used in this
booklet. When you see a capitalized term in bold-face print and are not certain
what it means, you can refer back to SPECIAL DEFINITIONS for the meaning.

In addition to these "SPECIAL DEFINITIONS" which are used throughout the
booklet, you may see some TERMS that are also in bold-face print, but that are
not capitalized. These TERMS have special meanings that are given in the
particular section of the booklet where the TERM is used.

*     The "ADMINISTRATOR" is responsible for the day-to-day administration of
      the Plan such as collecting election forms from EMPLOYEES. The
      ADMINISTRATOR is Comfort Systems USA, Inc.

*     The "ANSWERLINE" is the 1-800-253-2287 service from Connecticut General
      where, among other services, participants can model loans, transfer
      between Investment Funds, and change the investment election for future
      contributions.

*     Your "BENEFICIARY" means the person (or persons) entitled to receive
      distribution of your Plan account if you die before your Plan account has
      been fully distributed to you.

*     A "BREAK IN SERVICE" means a service crediting period in which you
      complete fewer than 501 Hours of Service.

*     Your "COMPENSATION" means the compensation from your EMPLOYER that is
      taken into account in determining the amount of contributions that you
      can make to the Plan or that your EMPLOYER can make to the Plan on your
      behalf.  COMPENSATION means the wages, salaries, fees for professional
      services, and all other amounts paid to you for personal services
      rendered to your EMPLOYER in the course of employment covered under the
      Plan that would be considered compensation for purposes of Section 415
      of the Internal Revenue Code and any such amounts that would be paid to
      you but for your election to defer such amounts under the Plan or under
      any other 401(k) or Section 125 plan maintained by your EMPLOYER or a
      RELATED COMPANY.

      Generally, COMPENSATION that you earn before you become eligible to
      participate in the Plan is not included in determining the amount of
      contributions that you can make to the Plan. Tax rules limit the amount of
      COMPENSATION that may be taken into account under the Plan each year. For
      1999, the maximum amount is $160,000 (this amount may be adjusted in
      future years).

                                       3
<PAGE>
*     A "CONTRIBUTION PERIOD" is the period for which EMPLOYER CONTRIBUTIONS
      will be made to the Plan. The CONTRIBUTION PERIOD for MATCHING
      CONTRIBUTIONS is each month. The CONTRIBUTION PERIOD for QUALIFIED
      NON-ELECTIVE CONTRIBUTIONS and PROFIT-SHARING CONTRIBUTIONS is each PLAN
      YEAR.

*     Your "ELIGIBILITY SERVICE" means the service credited to you that is used
      for determining whether you are eligible to participate in the Plan by
      making TAX-DEFERRED CONTRIBUTIONS to the Plan or by sharing in EMPLOYER
      CONTRIBUTIONS.

*     You are an "EMPLOYEE" covered by the Plan if you are employed by your
      EMPLOYER in any capacity. If you are a nonresident alien and do not
      receive United States source income, you are not an EMPLOYEE. If you are
      covered by a collective bargaining agreement that does not provide for
      your coverage under the Plan, you are not an EMPLOYEE.

*     Your "EMPLOYER" means Comfort Systems USA, Inc. and any RELATED COMPANY
      that adopts the Plan.

*     An "EMPLOYER CONTRIBUTION" means any contribution that your EMPLOYER makes
      to the Plan on your behalf.

*     An "ENROLLMENT DATE" means the date on which you are eligible to begin
      participation in the Plan by making TAX-DEFERRED CONTRIBUTIONS or by
      sharing in EMPLOYER CONTRIBUTIONS. An ENROLLMENT DATE occurs on the first
      day of each month of the PLAN YEAR.

*     A "HIGHLY COMPENSATED EMPLOYEE" means an employee who is highly
      compensated in accordance with specific IRS rules.  Generally, you may
      be a HIGHLY COMPENSATED EMPLOYEE under the IRS rules if you are paid
      more than $80,000 (as adjusted by the federal government) during the
      preceding Plan Year and, if the Employer so elects, you are in the
      top-paid group of employees, or you own five percent of an EMPLOYER.
      If you are concerned that you may be a HIGHLY COMPENSATED EMPLOYEE, you
      should consult the ADMINISTRATOR.

*     An "HOUR OF SERVICE" means each hour that is used for determining your
      ELIGIBILITY SERVICE and your VESTING SERVICE.  An HOUR OF SERVICE is
      each hour for which you are paid or entitled to be paid by your
      Employer, a PREDECESSOR EMPLOYER, or a RELATED COMPANY and includes
      your time at work, vacations, holidays, paid sick days, jury duty,
      military duty, approved leaves of absence, and certain maternity and
      paternity leaves of absence.  However, no more than 501 HOURS OF
      Service will be used to determine your service for any period for which
      you are not actually working, unless you are absent because of military
      duty and you return to employment while your reemployment rights are
      protected under Federal law.

                                       4
<PAGE>
*     An "INVESTMENT FUND" is a separate fund in which your Plan account or part
      of your Plan account may be invested.

*     A "MATCHING CONTRIBUTION" means any EMPLOYER CONTRIBUTION your EMPLOYER
      makes to the Plan on your behalf because of your TAX-DEFERRED
      CONTRIBUTIONS.

*     Your "NORMAL RETIREMENT DATE" means the date you reach age 59-1/2.

*     A "PLAN YEAR" means the 12-consecutive-month period beginning October 1,
      1998 and ending December 31, 1998 and each 12-consecutive-month period
      ending December 31 thereafter.

*     A "PREDECESSOR EMPLOYER" means a prior organization of your EMPLOYER for
      whom your EMPLOYER maintains a plan of the prior organization. A
      PREDECESSOR EMPLOYER also includes a prior company or business that was
      acquired by your EMPLOYER, provided the prior company or business
      maintained a SIMPLE IRA for its employees prior to the acquisition.

*     A "PROFIT-SHARING CONTRIBUTION" means any EMPLOYER CONTRIBUTION made to
      the Plan by your EMPLOYER as described in detail in EMPLOYER
      CONTRIBUTIONS.

*     A "QUALIFIED NON-ELECTIVE CONTRIBUTIONS" means any EMPLOYER Contribution
      made to the Plan by your EMPLOYER as described in detail in EMPLOYER
      CONTRIBUTIONS.

*     A "RELATED COMPANY" means any company or business that is considered to be
      related to an EMPLOYER under Internal Revenue Code rules.

*     A "ROLLOVER CONTRIBUTION" means any qualified cash contribution that you
      elect to roll over to the Plan from another retirement plan or from a
      rollover IRA.

*     The "SPONSOR" of the Plan is Comfort Systems USA, Inc.

*     A "TAX-DEFERRED CONTRIBUTION" means any contribution that you elect to
      make to the Plan on a before-tax basis.

*     The "TRUSTEE" holds the Plan assets for the benefit of covered EMPLOYEES,
      and may be a bank, an insurance company, or a group of individuals chosen
      by the SPONSOR.

*     A "VALUATION DATE" means a date on which the trust is valued and Plan
      accounts are adjusted to reflect investment earnings or losses. A
      VALUATION DATE under the Plan is the date or dates designated by the
      SPONSOR.

                                       5
<PAGE>
*     Your "VESTING SERVICE" means the service credited to you that is used for
      determining your vested interest in the value of the EMPLOYER
      CONTRIBUTIONS in your Plan account.

                                       6
<PAGE>
                                SERVICE CREDITING

ELIGIBILITY SERVICE

ELIGIBILITY SERVICE is used to determine whether you may participate in the Plan
by making TAX-DEFERRED CONTRIBUTIONS or by sharing in EMPLOYER CONTRIBUTIONS.

CREDITING OF ELIGIBILITY SERVICE

You are credited with a year of ELIGIBILITY SERVICE if you complete at least
1,000 HOURS OF SERVICE by the anniversary of your hire date. If you do not
complete at least 1,000 HOURS OF SERVICE during that period, you will be
credited with a year of ELIGIBILITY SERVICE for the first 12-month period
beginning on the anniversary of your hire date in which you complete at least
1,000 HOURS OF SERVICE.

VESTING SERVICE

VESTING SERVICE is used to determine your vested interest in the value of the
EMPLOYER CONTRIBUTIONS in your Plan account. Your vested interest means the
percentage of your Plan account that you are entitled to receive upon
distribution.

CREDITING OF VESTING SERVICE

You are credited with a year of VESTING SERVICE for each PLAN YEAR (including
PLAN YEARS before the effective date of the Plan) in which you complete at least
1,000 HOURS OF SERVICE.

CHANGE IN SERVICE CREDITING

If there is a change in the way VESTING SERVICE or ELIGIBILITY SERVICE is
credited under the Plan, special rules apply to assure that the change does not
affect the way service is credited to you for the transition period to your
disadvantage. In some cases, application of these rules may result in a person
being credited with two years of VESTING SERVICE or ELIGIBILITY Service for the
same period, but it will never result in a person being crediting with fewer
years of VESTING SERVICE or ELIGIBILITY SERVICE than if service crediting under
the Plan had not changed.

                                       7
<PAGE>
                                   ELIGIBILITY

If you were employed at the main corporate office of Comfort Systems USA, Inc.
on December 31, 1998, you became an Eligible Employee as of January 1, 1999.
Otherwise, if you are an EMPLOYEE, you may elect to make TAX-DEFERRED
CONTRIBUTIONS beginning on the ENROLLMENT DATE that coincides with or
immediately follows the date you complete one year of ELIGIBILITY SERVICE.

If you do not elect to make TAX-DEFERRED CONTRIBUTIONS beginning on the first
ENROLLMENT DATE that you are eligible to make an election, you may elect to make
TAX-DEFERRED CONTRIBUTIONS beginning on any subsequent ENROLLMENT DATE.

HOW TO MAKE AN ELECTION

To elect to make TAX-DEFERRED CONTRIBUTIONS, you must file your election with
the ADMINISTRATOR at least such number of days before the ENROLLMENT DATE on
which your election is to become effective as the ADMINISTRATOR prescribes.

TRANSFERS OF EMPLOYMENT

If you are transferred from other employment with your EMPLOYER or a RELATED
COMPANY to employment as an EMPLOYEE, you may elect to make TAX-DEFERRED
CONTRIBUTIONS beginning on your transfer date if you met the service
requirements above on an ENROLLMENT DATE coinciding with or preceding your
transfer date. Otherwise, you may elect to make TAX-DEFERRED CONTRIBUTIONS
beginning on the first ENROLLMENT DATE coinciding with or immediately following
the date you meet the service requirements above.

REEMPLOYMENT

If your employment terminates and you are later reemployed as an EMPLOYEE, you
may elect to make TAX-DEFERRED CONTRIBUTIONS beginning on your reemployment date
if you were eligible to elect to make TAX-DEFERRED CONTRIBUTIONS at the time you
terminated employment. Otherwise, you may elect to make TAX-DEFERRED
CONTRIBUTIONS beginning on the first ENROLLMENT DATE coinciding with or
immediately following the date you meet the service requirements above.

                                       8
<PAGE>
                           TAX-DEFERRED CONTRIBUTIONS

Your election to make TAX-DEFERRED CONTRIBUTIONS to the Plan authorizes your
EMPLOYER to reduce the amount of your COMPENSATION by a specified amount and to
contribute that amount to the Plan. Your COMPENSATION will be reduced and your
TAX-DEFERRED CONTRIBUTIONS commenced in accordance with your election beginning
with the first payment of COMPENSATION made to you on or after the date your
election is effective.

Your election to make TAX-DEFERRED CONTRIBUTIONS will also include your election
as to the investment of those contributions. Investment elections are discussed
in further detail in WHERE PLAN CONTRIBUTIONS ARE INVESTED and MAKING INVESTMENT
ELECTIONS.

AMOUNT OF TAX-DEFERRED CONTRIBUTIONS

The amount you authorize your EMPLOYER to withhold from your COMPENSATION as a
TAX-DEFERRED CONTRIBUTION may be a percentage of your COMPENSATION (in whole
percentage points) of not less than one percent nor more than 15 percent.

CHANGE IN AMOUNT OF TAX-DEFERRED CONTRIBUTIONS

You may change the amount you authorize your EMPLOYER to withhold from your
future COMPENSATION quarterly. To change the amount of your TAX-DEFERRED
CONTRIBUTION, you must file a new election with the ADMINISTRATOR at least such
number of days before the date the change is to take effect as the ADMINISTRATOR
prescribes.

SUSPENSION OF TAX-DEFERRED CONTRIBUTIONS

You may withdraw your authorization for your EMPLOYER to withhold amounts from
your future COMPENSATION and suspend your TAX-DEFERRED CONTRIBUTIONS at any
time. To suspend your TAX-DEFERRED CONTRIBUTIONS, you can call AnswerLine or
file written notice with the ADMINISTRATOR at least such number of days before
the date the suspension is to take effect as the ADMINISTRATOR prescribes. The
suspension will take effect for COMPENSATION paid to you after the required
notice period is over.

If you suspend your TAX-DEFERRED CONTRIBUTIONS, the suspension will remain in
effect until you elect to resume making TAX-DEFERRED CONTRIBUTIONS again.

                                       9
<PAGE>
RESUMPTION OF TAX-DEFERRED CONTRIBUTIONS

If you suspend your TAX-DEFERRED CONTRIBUTIONS, you may elect to resume making
TAX-DEFERRED CONTRIBUTIONS on any day of the PLAN YEAR. To resume TAX-DEFERRED
CONTRIBUTIONS you must file a new election with the Administrator at least such
number of days before the date TAX-DEFERRED CONTRIBUTIONS are to resume as the
ADMINISTRATOR prescribes.

VESTED INTEREST IN TAX-DEFERRED CONTRIBUTIONS

You are always 100 percent vested in the value of the TAX-DEFERRED CONTRIBUTIONS
in your Plan account.

                                       10
<PAGE>
                             ROLLOVER CONTRIBUTIONS

ROLLOVER CONTRIBUTIONS

If you are an EMPLOYEE, you may elect to roll over qualified distributions from
another plan or a rollover IRA into the Plan. Internal Revenue Code rules govern
whether a distribution from another plan or an IRA qualifies for roll over into
the Plan. The ADMINISTRATOR may require you to provide information to show that
the distribution you want to roll over qualifies under the Internal Revenue Code
rules.

If the distribution qualifies, you may roll it over into the Plan within 60 days
of the date you received it.

Your ROLLOVER CONTRIBUTION will become subject to all the terms and conditions
of the Plan and will only be distributable to you under the terms of the Plan.

VESTED INTEREST IN ROLLOVER CONTRIBUTIONS

You are always 100 percent vested in the value of the ROLLOVER CONTRIBUTIONS
(including any investment gains or losses on them) in your Plan account.

                                       11
<PAGE>
                             EMPLOYER CONTRIBUTIONS

In addition to your TAX-DEFERRED CONTRIBUTIONS, the Plan permits your Employer
to make EMPLOYER CONTRIBUTIONS to the Plan on your behalf. You are not taxed on
any EMPLOYER CONTRIBUTIONS that may be made on your behalf until distribution is
made to you.

The percentage of the value of the EMPLOYER CONTRIBUTIONS invested in your Plan
account that you are entitled to receive upon distribution is your vested
interest in your EMPLOYER CONTRIBUTIONS Plan account.

AMOUNT OF MATCHING CONTRIBUTIONS

Your EMPLOYER, in its discretion, may make a MATCHING CONTRIBUTION for a
CONTRIBUTION PERIOD on your behalf equal to a percentage, determined by your
EMPLOYER, of your TAX-DEFERRED CONTRIBUTIONS for the CONTRIBUTION PERIOD.

AMOUNT OF QUALIFIED NON-ELECTIVE EMPLOYER CONTRIBUTIONS

Your EMPLOYER, in its discretion, may make a QUALIFIED NON-ELECTIVE CONTRIBUTION
for a CONTRIBUTION PERIOD on your behalf equal to a percentage, determined by
your EMPLOYER, of your COMPENSATION for the CONTRIBUTION Period. Your EMPLOYER
will NOT make a QUALIFIED NON-ELECTIVE CONTRIBUTION on your behalf for a
CONTRIBUTION PERIOD if you are a HIGHLY COMPENSATED Employee for that
CONTRIBUTION PERIOD.

AMOUNT OF PROFIT-SHARING CONTRIBUTIONS

Your EMPLOYER, in its discretion, may make a PROFIT-SHARING CONTRIBUTION for a
CONTRIBUTION PERIOD on your behalf equal to a percentage, determined by your
EMPLOYER, of your COMPENSATION for the CONTRIBUTION PERIOD.

ELIGIBILITY TO PARTICIPATE IN EMPLOYER CONTRIBUTIONS

You are eligible to begin participating in EMPLOYER CONTRIBUTIONS under the Plan
on the same day that you are eligible to begin making TAX-DEFERRED CONTRIBUTIONS
to the Plan.

                                       12
<PAGE>
ANNUAL SERVICE REQUIREMENT

If you have met the eligibility requirements to begin participating in EMPLOYER
CONTRIBUTIONS, you will share in the allocation of PROFIT-SHARING CONTRIBUTIONS
for a particular CONTRIBUTION PERIOD only if you also: (1) complete at least
1,000 HOURS OF SERVICE during the PLAN YEAR; and (2) are employed by an EMPLOYER
on the last day of the CONTRIBUTION PERIOD. However, you will share in the
allocation of PROFIT-SHARING CONTRIBUTIONS for a particular CONTRIBUTION PERIOD
even if you do not complete at least 1,000 HOURS OF SERVICE or are not employed
by an EMPLOYER on the last day of the CONTRIBUTION PERIOD because you retired at
or after your NORMAL RETIREMENT DATE or at or after age 55 with at least 5 years
of VESTING SERVICE, or because you died or became permanently and totally
disabled. You are permanently and totally disabled if the ADMINISTRATOR
determines, on the basis of an acceptable physician's certificate, that you are
permanently disabled such that you can no longer continue in the service of your
Employer.

REEMPLOYMENT

If your employment terminates and you are later reemployed as an EMPLOYEE, you
will be eligible to begin participating in EMPLOYER CONTRIBUTIONS on your
reemployment date if you were eligible to participate in EMPLOYER CONTRIBUTIONS
at the time you terminated employment. Otherwise, you will be able to begin
participating in EMPLOYER CONTRIBUTIONS on the same day that you are first
eligible to make TAX-DEFERRED CONTRIBUTIONS to the Plan.

VESTED INTEREST IN EMPLOYER CONTRIBUTIONS

You are always 100 percent vested in the value of the QUALIFIED NON-ELECTIVE
CONTRIBUTIONS in your Plan account. Your vested interest in the value of the
MATCHING and PROFIT-SHARING CONTRIBUTIONS in your Plan account is determined in
accordance with the following schedule:

      YEARS OF VESTING SERVICE                  VESTED INTEREST
      ------------------------                  ---------------
         Less than 1                                    0%
         1 but less than 2                             20%
         2 but less than 3                             40%
         3 but less than 4                             60%
         4 but less than 5                             80%
         5 or more                                    100%

                                       13
<PAGE>
Even if you have not otherwise completed enough years of VESTING SERVICE to be
100 percent vested in the value of the EMPLOYER CONTRIBUTIONS in your Plan
account, you will become 100 percent vested if you retire from employment with
your EMPLOYER on or after your NORMAL RETIREMENT DATE, you die or become
permanently and totally disabled while still in the employment of your EMPLOYER,
or your employment terminates with your EMPLOYER after you reach age 55 and
complete 5 years of VESTING SERVICE. You are permanently and totally disabled if
the ADMINISTRATOR determines, on the basis of an acceptable physician's
certificate, that you are permanently disabled such that you can no longer
continue in the service of your EMPLOYER.

                                       14
<PAGE>
                          LIMITATIONS ON CONTRIBUTIONS

Federal law limits the maximum amount of TAX-DEFERRED CONTRIBUTIONS that you can
make to the Plan each calendar year. For 1999, the maximum amount is $10,000
(this amount is adjusted upward each year). If the ADMINISTRATOR determines that
the amount you authorize your EMPLOYER to withhold from your COMPENSATION would
exceed the maximum amount permitted for the year, the ADMINISTRATOR will adjust
the amount withheld so that it does not exceed the maximum.

If you are a HIGHLY COMPENSATED EMPLOYEE, Federal law also limits the amount of
TAX-DEFERRED CONTRIBUTIONS that you can make to the Plan and the amount of
MATCHING CONTRIBUTIONS that your EMPLOYER can make to the Plan on your behalf.
If the ADMINISTRATOR determines that contributions for HIGHLY COMPENSATED
EMPLOYEES would exceed the amount that may be contributed to the Plan, it may
adjust the amount of TAX-DEFERRED CONTRIBUTIONS, AFTER-TAX CONTRIBUTIONS, and
MATCHING CONTRIBUTIONS that would otherwise be made for HIGHLY COMPENSATED
EMPLOYEES.

In addition, contributions to the Plan are subject to other maximum limitations
under the Internal Revenue Code and other applicable law. Amounts that would
exceed those limits will be distributed or forfeited as provided under the Plan.

                                       15
<PAGE>
                      WHERE PLAN CONTRIBUTIONS ARE INVESTED

You direct how your TAX-DEFERRED CONTRIBUTIONS and ROLLOVER CONTRIBUTIONS and
how the EMPLOYER CONTRIBUTION made on your behalf are invested. You may direct
that contributions be invested in any of the INVESTMENT FUNDS made available to
you under the Plan. Upon request, the ADMINISTRATOR will provide you with
additional information of the different INVESTMENT FUNDS available. New
INVESTMENT FUNDS may be added and existing INVESTMENT FUNDS changed. The
ADMINISTRATOR will update the description of the available INVESTMENT FUNDS to
reflect any changes.

404(C) PROTECTION

Because you direct how contributions to your Plan account are invested, the
SPONSOR and the TRUSTEE, who would otherwise be responsible under Federal rules
for directing investments, are relieved of this responsibility with respect to
those contributions. Therefore, they are no longer liable under the law for any
losses to your Plan account that are the direct and necessary result of your
investment directions. They are still responsible, however, for being sure that
you have diverse investment opportunities and sufficient opportunity to direct
the investment of your Plan account.

                                       16
<PAGE>
                           MAKING INVESTMENT ELECTIONS

INVESTMENT ELECTIONS

At least such number of days as the ADMINISTRATOR prescribes before the
effective date of your participation in the Plan, you must file an investment
election with the ADMINISTRATOR directing how contributions to your Plan account
are to be invested.

Your investment election must specify the percentage of the contributions to
your Plan account that is to be invested among the INVESTMENT FUNDS.

FAILURE TO DIRECT INVESTMENTS

If you do not direct how contributions to your Plan account are to be invested,
the contributions will be invested among the INVESTMENT FUNDS selected by the
ADMINISTRATOR.

CHANGE OF INVESTMENT ELECTIONS

You may change how contributions to your Plan account are invested on any day of
the PLAN YEAR. To perform this transaction, you may call ANSWERLINE or contact
the ADMINISTRATOR.

ELECTION TO TRANSFER BETWEEN INVESTMENT FUNDS

You may transfer any amount held in your Plan account from one INVESTMENT Fund
to another INVESTMENT FUND. You must specify the amount that is to be
transferred. To perform this transaction, you may call ANSWERLINE or contact the
ADMINISTRATOR.

Direct transfers may not be made between one of the guaranteed long term
vehicles (Guaranteed Income Fund) and any fund deemed to be a competing fund,
such as a bond fund, without first going through an equity vehicle for at least
90 days.

A transfer may be made effective as of any day of the PLAN YEAR.

ANSWERLINE 1-800 SERVICE

                                       17
<PAGE>
The ANSWERLINE Service is a state-of-the-art system that allows you to access
information about your account using a touch-tone telephone. To access
ANSWERLINE, call 1-800-253-2287. ANSWERLINE enables you to perform certain
transactions, investment transfers, and investment changes in accordance with
the terms of your Plan. You should contact the ADMINISTRATOR for materials that
describe the features and options that are available.

ANSWERLINE is normally available 24 hours a day, seven days a week, except
during a brief period of approximately 20 minutes each morning between the hours
of 3:30 a.m. and 7:00 a.m., eastern time.

                                       18
<PAGE>
                          LOANS FROM YOUR PLAN ACCOUNT

You may apply for a loan from your Plan account, by calling ANSWERLINE, while
you are employed by your EMPLOYER. If you have made a ROLLOVER CONTRIBUTION to
the Plan, but have not yet met the eligibility requirements to participate in
the Plan, you may not receive a Plan loan until you have met the eligibility
requirements to participate. The ADMINISTRATOR will provide you with a copy of
the rules governing Plan loans.

Any Plan loan made to you will be treated as a separate investment of the assets
held in your Plan account.

INTERNAL REVENUE CODE RULES

Specific Internal Revenue Code rules govern loans from tax-qualified plans. Any
Plan loan must meet the minimum requirements set forth in the IRS rules. The
loan guidelines provided by the ADMINISTRATOR may, however, set forth more
stringent requirements than the IRS minimum. In that case, any Plan loan must
meet the more stringent requirements set forth in the loan guidelines.

The interest rate charged on a Plan loan must be a reasonable rate similar to
the rate charged for a loan made under similar circumstances by persons in the
business of lending money.

The amount of any Plan loan, when added to the outstanding balance of all other
loans made to you from the Plan or any other plan maintained by your EMPLOYER or
a RELATED COMPANY, may not exceed specified limits.

The term of any Plan loan may not exceed five years, unless it is used to
purchase your principal residence. If you are using the loan to purchase your
principal residence, your ADMINISTRATOR may allow a longer repayment period of
up to 10 years.

Any Plan loan must be repaid in substantially equal installments through payroll
deductions over the term of the loan. Payments must be made not less frequently
than quarterly.

COLLATERAL FOR LOAN

                                       19
<PAGE>
If you receive a Plan loan, a portion of your vested Plan account equal to the
loan amount will be used as collateral for the loan. If a Plan loan is still
outstanding at the time distribution of your Plan account is to be made, the
amount distributed to you will be reduced by the amount of your vested Plan
account that is held as collateral for the loan, but only to the extent
necessary to repay the loan. If you terminate employment with an outstanding
loan, the loan will become immediately due and payable and your vested Plan
account will be reduced by the amount of the outstanding loan balance.

DEFAULT ON A LOAN

You will not receive a Plan loan unless you agree that your Plan account may be
charged for unpaid principal and interest if you default on the loan. A Plan
loan may be declared by the ADMINISTRATOR to be in default if you fail to make
required payments on the loan within 90 days of the due date or there is an
outstanding balance on the last scheduled repayment date. If a loan is declared
to be in default, the entire unpaid balance of the loan, together with accrued
interest, is immediately due and payable. If the balance and interest is not
then paid, your Plan account will be charged with the amount of the balance and
interest at the earliest date that distribution may be made to you without
affecting the tax qualification of the Plan.

ADDITIONAL PLAN LOAN RULES

The minimum amount of any Plan loan that you may receive is $1,000.

You may not have more than one outstanding Plan loan at any time.

You may pre-pay the balance of any Plan loan before its due date without
incurring a penalty.

If your employment terminates, the outstanding balance of any Plan loan made to
you shall be immediately due and owing unless you elect to roll over an
outstanding loan to another qualified plan that accepts such rollovers.

                                       20
<PAGE>
                             IN-SERVICE WITHDRAWALS

Under certain circumstances, you may make a cash withdrawal or a withdrawal
through the purchase of a single life annuity or a qualified joint and survivor
annuity (as described in AUTOMATIC FORM OF ANNUITY PAYMENT in FORMS OF PAYMENT)
from your Plan account while you are still employed by your EMPLOYER.

WITHDRAWAL OF PRIOR AFTER-TAX CONTRIBUTIONS

You may withdraw the value of the AFTER-TAX CONTRIBUTIONS in your Plan account,
subject to the overall conditions and limitations on withdrawals listed below.

WITHDRAWAL OF ROLLOVER CONTRIBUTIONS

You may withdraw the value of the ROLLOVER CONTRIBUTIONS in your Plan account,
subject to the overall conditions and limitations on withdrawals listed below.

WITHDRAWAL OF EMPLOYER CONTRIBUTIONS EXCEPT HARDSHIP WITHDRAWALS

If you have reached age 59 1/2, you may withdraw the value of the EMPLOYER
CONTRIBUTIONS in your Plan account.

Any withdrawal of EMPLOYER CONTRIBUTIONS that you make is subject to the overall
conditions and limitations on withdrawals listed below.

Please note, Federal law prohibits withdrawal from the Plan while you are still
employed and before age 59 1/2 of certain EMPLOYER CONTRIBUTIONS that are used
by your EMPLOYER in meeting Federal nondiscrimination tests.

WITHDRAWAL OF TAX-DEFERRED CONTRIBUTIONS EXCEPT HARDSHIP WITHDRAWALS

If you have reached age 59 1/2, you may withdraw the value of the TAX-DEFERRED
CONTRIBUTIONS in your Plan account. Any withdrawal of TAX-DEFERRED CONTRIBUTIONS
that you make is subject to the overall conditions and limitations on
withdrawals listed below.

                                       21
<PAGE>
OVERALL CONDITIONS AND LIMITATIONS ON WITHDRAWALS EXCEPT HARDSHIP WITHDRAWALS

You may make a withdrawal from your Plan account effective as soon as reasonably
practicable following the ADMINISTRATOR'S approval of your application.

If you are married at the time you wish to make a withdrawal, and your Plan
account is subject to the spousal consent requirements described in FORM OF
PAYMENT, your spouse must consent in writing to the withdrawal, unless you
receive payment through the purchase of a qualified joint and survivor annuity
(as described in AUTOMATIC FORM OF ANNUITY in FORM OF PAYMENT).

HARDSHIP WITHDRAWALS

If you incur an immediate and heavy financial need, you may make a hardship
withdrawal of your TAX-DEFERRED CONTRIBUTIONS and the EMPLOYER CONTRIBUTIONS in
your Plan account, but only if the ADMINISTRATOR determines that the withdrawal
is necessary to meet your financial need.

Federal law prohibits hardship withdrawals of investment earnings on
TAX-DEFERRED CONTRIBUTIONS.

FINANCIAL NEEDS FOR WHICH HARDSHIP WITHDRAWALS ARE AVAILABLE

The financial needs for which you can get a hardship withdrawal are:

*        medical expenses of you, your spouse, or your dependents for the
         diagnosis, cure, mitigation, treatment, or prevention of disease;

*        purchase of your principal residence (excluding mortgage payments);

*        tuition payments, related educational fees, and room and board
         expenses for post-secondary education for you, your spouse, or your
         dependents; or

*        prevention of your eviction from your principal residence or
         foreclosure on the mortgage of your principal residence.

                                       22
<PAGE>
DEMONSTRATING NEED FOR HARDSHIP WITHDRAWAL

The ADMINISTRATOR will approve a hardship withdrawal to you if all of the
following requirements are met: (1) the withdrawal amount does not exceed the
amount you need to meet your financial need; (2) you have obtained all other
distributions and all non-taxable loans available to you from any plan
maintained by your EMPLOYER or any RELATED COMPANY; (3) you suspend your
TAX-DEFERRED CONTRIBUTIONS to the Plan (and any other plan maintained by your
EMPLOYER or any RELATED COMPANY) for at least 12 months after receipt of the
withdrawal; and (4) the maximum amount of the TAX-DEFERRED CONTRIBUTIONS you are
permitted under Internal Revenue Code rules to make to the Plan (and any other
plan maintained by your EMPLOYER or any RELATED COMPANY) for the calendar year
following the calendar year in which you receive the withdrawal is reduced by
the amount of the TAX-DEFERRED CONTRIBUTIONS you made during the calendar year
in which you received the withdrawal.

APPLICATION FOR HARDSHIP WITHDRAWALS

You may make a withdrawal from your Plan account effective as soon as reasonably
practicable following the ADMINISTRATOR'S approval of your hardship application.

If you are married at the time you wish to make a withdrawal, and your Plan
account is subject to the spousal consent requirements described in FORM OF
PAYMENT, your spouse must consent in writing to the withdrawal, unless you
receive payment through the purchase of a qualified joint and survivor annuity
(as described in AUTOMATIC FORM OF ANNUITY in FORM OF PAYMENT).

                                       23
<PAGE>
                        FORFEITURE OF NON-VESTED AMOUNTS

If your employment terminates with your EMPLOYER (and all RELATED COMPANIES) and
you are not 100 percent vested in the value of the EMPLOYER CONTRIBUTIONS in
your Plan account at the time that your employment terminates, you will forfeit
the non-vested portion of your Plan account. If you forfeit a portion of your
Plan account, the forfeited amount will be used to reduce the amount of EMPLOYER
CONTRIBUTIONS for the PLAN YEAR in which the forfeiture occurs

TIMING OF FORFEITURE

If you have no vested interest in your Plan account, your Plan account will be
forfeited on the date you first incur a BREAK-IN-SERVICE following your
termination of employment.

If you have a vested interest in your Plan account and receive distribution of
that interest before the end of the second PLAN YEAR beginning on or after the
date your employment terminates, the non-vested portion of your Plan account
will be forfeited on the date you first incur a BREAK-IN-SERVICE following the
distribution.

If you have a vested interest in your Plan account, but do not receive
distribution of that interest within the time period described above, the
non-vested portion of your Plan account will be forfeited on the date you incur
five consecutive BREAKS-IN-SERVICE following your termination of employment.

If you return to employment with your EMPLOYER (or a RELATED COMPANY) before the
non-vested portion of your Plan account is forfeited, the forfeiture will not
occur.

RECREDITING OF FORFEITED AMOUNTS

If you return to employment with your EMPLOYER (or a RELATED COMPANY) after
forfeiting the non-vested portion of your Plan account, the amount you forfeited
will be recredited to your Plan account if you are reemployed by your EMPLOYER
(or a RELATED COMPANY) before the date you incur five consecutive
BREAKS-IN-SERVICE beginning on the later of the date your employment terminated
or the date distribution of the vested portion of your Plan account was made to
you. If you received distribution of the vested portion of your Plan account,
you may elect to repay to the Plan the full amount of the distribution that is
attributable to Employer Contributions before the earlier of the end of the
five-year period that begins on the date you are reemployed or the date you
incur five consecutive BREAKS-IN-SERVICE beginning on the date distribution of
the vested portion of your Plan account was made to you.

                                       24
<PAGE>
TREATMENT OF FORFEITED AMOUNTS

Amounts that are forfeited during the PLAN YEAR are used to reduce your
EMPLOYER'S contribution obligations to the Plan.

                                       25
<PAGE>
                        DISTRIBUTION OF YOUR PLAN ACCOUNT

TIMING OF DISTRIBUTION

If your employment terminates with your EMPLOYER (and all RELATED COMPANIES),
the Plan permits distribution of your Plan account. Distribution may be made as
soon as reasonably practicable following the date your employment terminates.

APPLICATION FOR DISTRIBUTION

Unless your Plan account is CASHED OUT as provided below, distribution of your
Plan account will not be made until April 1 of the calendar year following the
calendar year in which you reach age 70 1/2 unless you have filed an application
for distribution with the ADMINISTRATOR.

You must pay for all fees and expenses to maintain your vested interest in the
Plan. These expenses will be withdrawn directly from your account.

SUSPENSION OF DISTRIBUTION

If you are reemployed by your EMPLOYER (or a RELATED COMPANY) before
distribution of the full value of your Plan account has been made, distribution
of your Plan account will be suspended until your reemployment terminates.

DISTRIBUTION TO YOU

If distribution of your Plan account is to be made to you in a single-sum
payment, the full value of your Plan account will be distributed to you when you
receive the single-sum payment. If distribution of your Plan account is to be
made to you in a series of installment payments, the full value of your Plan
account will be distributed to you when you receive the final installment
payment. If distribution of your Plan account is to be made to you through the
purchase of an annuity contract from an insurance company, the full value of
your Plan account will be distributed to you when the annuity contract is
purchased from the insurance company, even though your distribution for Federal
income tax purposes extends over the period of annuity payments. If distribution
of your Plan account is to be made to you in more than one of the above forms of
payment, then the full value of your Plan account will be distributed to you
only when the full value of the portion of your Plan account payable in each
form is distributed to you.

                                       26
<PAGE>
DISTRIBUTION TO YOUR BENEFICIARY

If you die before distribution of the full value of your Plan account has been
made to you, distribution of your Plan account will be made to your BENEFICIARY
as soon as reasonably practicable following the date your BENEFICIARY files an
application for distribution with the ADMINISTRATOR. Unless distribution of your
Plan account is to be made to your BENEFICIARY by purchase of an annuity
contract from an insurance company or in a series of installment payments,
distribution to your BENEFICIARY must be made no later than the end of the fifth
calendar year beginning after your death.

If distribution of your Plan account is to be made to your BENEFICIARY by
purchase of an annuity contract from an insurance company or in a series of
installment payments, then distribution to your BENEFICIARY for Federal income
tax purposes must begin:

(1)      if your BENEFICIARY is your spouse, no later than the end of the first
         calendar year beginning after your death or the end of the calendar
         year in which you would have reached age 70 1/2, whichever is later; or

(2)      if your BENEFICIARY is someone other than your spouse, no later than
         the end of the first calendar year beginning after your death.

CASH OUTS OF PLAN ACCOUNTS AND CONSENT TO DISTRIBUTION

If the value of your vested interest in your Plan account is $5,000 or less,
your Plan account will be "CASHED OUT" by distributing your vested interest in
your Plan account in a single-sum payment as soon as reasonably practicable
following the date your employment terminates. Your Plan account will be CASHED
OUT even if you do not consent to the distribution.

If the value of your vested interest in your Plan account is more than $5,000,
distribution of your Plan account cannot be made before your NORMAL RETIREMENT
DATE without your written consent and the written consent of your spouse if your
Plan account is subject to the spousal consent requirements described in FORM OF
PAYMENT and distribution is to be made other than by purchase of an annuity
contract from an insurance company to be paid in the form of a QUALIFIED JOINT
AND SURVIVOR ANNUITY, as described in FORM OF PAYMENT.

DIRECT ROLLOVER REQUIREMENTS

                                       27
<PAGE>
If the distribution of your Plan account is eligible for rollover into an
Individual Retirement Account (or "IRA") or other eligible retirement plan, you
can elect to have the distribution transferred directly into the Individual
Retirement Account or other eligible retirement plan. If you do not elect to
have a distribution eligible for rollover directly transferred into an
Individual Retirement Account or other eligible retirement plan, a 20 percent
mandatory Federal income tax withholding applies to the distribution. If a
distribution of your Plan account to your Beneficiary is eligible for rollover,
the rollover election and mandatory tax withholding apply to the distribution.

REQUIRED DISTRIBUTIONS

Distribution of your Plan account must be made no later than the April 1
following the close of the calendar year in which you reach age 70 1/2 ,
regardless of whether your employment has terminated at that time or whether you
have filed an application for distribution with the ADMINISTRATOR. Special rules
apply if you reached age 70 1/2 before January 1, 1988.

                                       28
<PAGE>
                                 FORM OF PAYMENT

NORMAL FORM OF PAYMENT

Unless you elect one of the optional forms of payment described below,
distribution of your Plan account will be made to you in a single-sum payment.

OPTIONAL FORMS OF PAYMENT

You may elect to have distribution of all or a portion of your Plan account made
in one of the optional forms of payment provided under the Plan. The optional
forms of payment available under the Plan are:

*        A SERIES OF INSTALLMENT PAYMENTS. You specify the period over which
         installment payments will be paid. Under Federal law, however, the
         maximum period over which installment payments may be paid cannot
         exceed your life expectancy or the joint life expectancies of you and
         your BENEFICIARY. For purposes of determining the maximum payment
         period, your life expectancy, and the life expectancy of your
         BENEFICIARY, if applicable, will be calculated only once, at the time
         installment payments begin.

         Installment payments will be paid in reasonably equal payments, except
         as necessary to reflect increases or decreases in the value of your
         Plan account.

*        THE PURCHASE OF AN ANNUITY CONTRACT FROM AN INSURANCE COMPANY. You may
         specify the period over which the annuity is to be paid. Under Federal
         law, however, the maximum period over which an annuity may be paid
         cannot exceed your life or the joint lives of you and your BENEFICIARY.
         Unless you elect otherwise, the annuity purchased for you will be the
         automatic form of annuity provided under the Plan.

AUTOMATIC FORM OF ANNUITY PAYMENT

If you are not married, the automatic form of annuity purchased for you will be
a SINGLE LIFE ANNUITY. Under a "SINGLE LIFE ANNUITY", monthly payments are made
to you for your life and end on your death.

                                       29
<PAGE>
If you are married, the automatic form of annuity purchased for you will be a 50
PERCENT QUALIFIED JOINT AND SURVIVOR ANNUITY. Under a "50 PERCENT QUALIFIED
JOINT AND SURVIVOR ANNUITY", monthly payments are made to you for your life with
monthly payments continuing to your surviving spouse after your death equal to
50 percent of the monthly amount you were getting at death. These monthly
payments continue to your surviving spouse for your spouse's life and end on
your spouse's death. To receive these continuing payments, your surviving spouse
must be the same spouse to whom you were married at the time distribution of
your Plan account was made.

FORM OF PAYMENT TO YOUR BENEFICIARY

Subject to the requirements in QUALIFIED PRERETIREMENT SURVIVOR ANNUITY
REQUIREMENTS, if you die before distribution of your Plan account is made,
distribution of your Plan account will be made to your BENEFICIARY in any of the
forms of payment available under the Plan that your BENEFICIARY selects. Your
BENEFICIARY may not, however, select an annuity payable over the joint lives of
your BENEFICIARY and another person. If you die after distribution of your Plan
account has begun in a series of installment payments, but before distribution
of the full value of your vested interest in your Plan account is made,
installment payments will continue to your BENEFICIARY after your death.

QUALIFIED PRERETIREMENT SURVIVOR ANNUITY REQUIREMENTS

If you are married and elect an annuity form of payment, and if you die before
any distribution of your Plan account is made, distribution of your Plan account
will be made to your spouse through the purchase of a QUALIFIED PRERETIREMENT
SURVIVOR ANNUITY from an insurance company. A "QUALIFIED PRERETIREMENT SURVIVOR
ANNUITY" is an annuity payable for the life of your spouse.

Your spouse may elect instead to have distribution of your Plan account made in
the other form of payment available under the Plan. Your spouse may not,
however, select an annuity payable over the joint lives of your spouse and any
other person.

You may designate a person other than your spouse to receive distribution of
your Plan account. If your designation is made before the first day of the PLAN
YEAR in which you either reach age 35 or your employment terminates with your
EMPLOYER and all RELATED COMPANIES, whichever is earlier, your designation will
become ineffective on the first day of the PLAN YEAR in which you reach age 35
and you will have to make a new designation or your Plan account will once more
be payable to your spouse as a QUALIFIED PRERETIREMENT SURVIVOR ANNUITY. Your
spouse must consent in writing to your designation, as described in SPOUSAL
CONSENT REQUIREMENTS.

SPOUSAL CONSENT REQUIREMENTS

                                       30
<PAGE>
If you elect to have distribution of your Plan account made through the purchase
of an annuity contract, but wish to have annuity payments in a form other than
the automatic form of annuity payment or wish to change your election to have
distribution of your Plan account made in a form of payment other than an
annuity, your spouse must sign a written consent. In addition, if you wish to
designate a non-spouse BENEFICIARY to receive distribution of your Plan account,
your spouse must sign a written consent to your designation.

Your spouse's written consent must be witnessed by a Plan representative or a
notary public and must specifically acknowledge the form of payment other than
the automatic form of annuity that you have elected, if applicable, and any
non-spouse BENEFICIARY you have designated. Instead of specifically
acknowledging your selections, your spouse's consent may be a general consent
that permits you to change the form of payment or designation of BENEFICIARY
without further spousal consent being required.

Your spouse's written consent is not required if your spouse cannot be located,
if you have a court order stating that you are legally separated from your
spouse, or if you have a court order stating that your spouse has abandoned you.

EFFECT OF REEMPLOYMENT ON FORM OF PAYMENT ELECTION

If you are reemployed by your EMPLOYER (or a RELATED COMPANY) before
distribution of the full value of your vested interest in your Plan account is
made, any form of payment election that you made will be ineffective with
respect to your Plan account, except that if you have elected the optional
annuity form of payment the requirements in SPOUSAL CONSENT REQUIREMENTS and in
QUALIFIED PRERETIREMENT SURVIVOR ANNUITY REQUIREMENTS will continue to apply to
your Plan account.

DISTRIBUTION IN EMPLOYER STOCK

Instead of receiving a cash distribution from the Plan, you may elect to receive
distribution of the portion of your Plan account that is invested in EMPLOYER
stock in EMPLOYER stock. Partial shares of EMPLOYER stock held in your Plan
account will not be distributed to you. Instead, you will receive a cash
distribution of the value of any partial shares of EMPLOYER stock.

OVERRIDING CASH OUT PROVISION

If the value of your vested interest in your Plan account is $5,000 or less,
your Plan account will be "CASHED OUT" by distributing your vested interest in
your Plan account to you in a single-sum payment. Your Plan account will be
CASHED OUT even if you have elected a form of payment other than a single-sum
payment.

                                       31
<PAGE>
                         YOUR BENEFICIARY UNDER THE PLAN

You may designate a BENEFICIARY on the form provided by the ADMINISTRATOR to
receive distribution of your Plan account if you die. Unless you marry (or
remarry) or elect an annuity form of payment, your BENEFICIARY will not change
until you file a new designation of BENEFICIARY form with the ADMINISTRATOR
designating a different BENEFICIARY.

BENEFICIARY IF YOU ARE MARRIED

If you are married, your BENEFICIARY under the Plan is your spouse. Unless you
have elected the optional annuity form of payment and are therefore subject to
the further restrictions discussed below, you may designate a non-spouse
BENEFICIARY on the form provided by the ADMINISTRATOR with your spouse's written
consent.

If you elect the optional annuity form of payment, you may designate a
non-spouse BENEFICIARY on the form provided by the ADMINISTRATOR to receive
distribution of your Plan account with your spouse's written consent. If your
designation is made before the first day of the PLAN YEAR in which you either
reach age 35 or your employment terminates with your EMPLOYER and all RELATED
COMPANIES, whichever is earlier, your designation will become ineffective on the
first day of the PLAN YEAR in which you reach age 35 and you will have to make a
new designation or your Plan account will once more be payable to your spouse as
a QUALIFIED PRERETIREMENT SURVIVOR ANNUITY.

EFFECT OF ELECTION OF OPTIONAL ANNUITY FORM OF PAYMENT ON PRIOR BENEFICIARY
DESIGNATION

If you are married and have designated a non-spouse BENEFICIARY with your
spouse's written consent, and if you then elect the optional annuity form of
payment, your prior BENEFICIARY designation will be ineffective.

EFFECT OF MARRIAGE ON PRIOR BENEFICIARY DESIGNATION

If you designate a non-spouse BENEFICIARY and then get married, your prior
BENEFICIARY designation will be ineffective.

                                       32
<PAGE>
BENEFICIARY WHERE THERE IS NO DESIGNATED BENEFICIARY

If you die without designating a BENEFICIARY or if no BENEFICIARY survives you,
your BENEFICIARY will be your surviving spouse or, if you have no surviving
spouse, your estate.

SPOUSAL CONSENT TO BENEFICIARY DESIGNATION

If you designate a BENEFICIARY other than your spouse, your spouse must sign a
written consent to your designation of a BENEFICIARY. Your spouse's written
consent must specifically acknowledge the non-spouse BENEFICIARY you have
designated and must be witnessed by a Plan representative or a notary public.
Instead of specifically acknowledging your designated, non-spouse BENEFICIARY,
your spouse's consent may be a general consent that permits you to change your
designation of BENEFICIARY without further spousal consent.

Your spouse's written consent will not be required if your spouse cannot be
located, you have a court order stating that you are legally separated from your
spouse, or you have a court order stating that your spouse has abandoned you.

                                       33
<PAGE>
                               CLAIMS FOR BENEFITS

Your application for benefits under the Plan should be sent to the
ADMINISTRATOR.

If you disagree with a decision made by the ADMINISTRATOR regarding a claim
under the Plan, you have the right to ask the ADMINISTRATOR for a review of its
decision. You should contact the ADMINISTRATOR at its business address or at its
business phone number within 60 days of the date on which you receive notice of
denial of the claim. A request for review must contain the following
information:

         (a)    the date you received notice of denial of your claim and the
                date your request for review is filed;

         (b)    the specific part of the claim you want reviewed;

         (c)    a statement setting forth the basis upon which you think the
                decision should be reversed; and

         (d)    any written material that you think is pertinent to your claim
                and that you want the ADMINISTRATOR to examine.

Unless additional time is required, the ADMINISTRATOR will review the denial of
your claim and notify you in writing of its decision, within 60 days of the
filing of your request.

                                       34
<PAGE>
                      AMENDMENT AND TERMINATION OF THE PLAN

PLAN AMENDMENT

The SPONSOR reserves the right to amend the Plan, either prospectively or
retroactively.

PLAN TERMINATION

The SPONSOR reserves the right to terminate the Plan at any time. In addition,
an EMPLOYER may withdraw from the Plan at any time. If an EMPLOYER withdraws
from the Plan, the EMPLOYER will determine whether the withdrawal should be
treated as a termination of the Plan with respect to its EMPLOYEES.

If the Plan is terminated, you will be 100 percent vested in the value of the
EMPLOYER CONTRIBUTIONS (including any investment gains or losses on them) in
your Plan account and distribution of your Plan account will be made as
permitted under Federal law.

                                       35
<PAGE>
                            MISCELLANEOUS INFORMATION

PLAN BOOKLET DOES NOT CREATE EMPLOYMENT CONTRACT

The only purpose of this booklet is to provide you with information about the
benefits available under the Plan. The benefits described are not conditions of
employment. Nor is the booklet intended to create an employment contract between
you and your EMPLOYER. Nothing in this booklet should be construed as a
limitation on your or your EMPLOYER'S right to terminate your employment at any
time, with or without cause.

NO GUARANTEES REGARDING INVESTMENT PERFORMANCE

Neither the SPONSOR, your EMPLOYER, nor the ADMINISTRATOR guarantees any
particular investment gain or appreciation on your Plan account nor guarantees
your Plan account against investment losses or depreciation.

IF CIRCUMSTANCES REQUIRE THE DELAY OF A WITHDRAWAL

All withdrawals may be delayed by Connecticut General Life Insurance Company
under certain circumstances. A description of these situations may be obtained
from your ADMINISTRATOR. Regardless of the circumstances, there will be no delay
in payment in cases of death, retirement, termination of employment, or total
and permanent disability.

TRANSFERS FROM THE GUARANTEED INCOME FUND MAY BE LIMITED

Under certain circumstances the amount transferred from the Guaranteed Income
Fund to other investment funds may be limited by Connecticut General Life
Insurance Company. Please see your ADMINISTRATOR for further information on
transferring funds from the Guaranteed Income Fund.

PAYMENT OF ADMINISTRATIVE EXPENSES

Generally, the expenses of administering the Plan are paid from Plan assets,
unless your EMPLOYER elects to make the payment. In addition, your particular
Plan account may be charged for the cost of administrative expenses that are
attributable directly to your Plan account, unless your EMPLOYER elects to make
the payment.

                                       36
<PAGE>
QUALIFIED DOMESTIC RELATIONS ORDERS

Generally, Federal law prohibits payment of your Plan account to someone other
than you, unless you have died. An exception to this rule is made for QUALIFIED
DOMESTIC RELATIONS ORDERS. A QUALIFIED DOMESTIC RELATIONS ORDER may require that
a portion of your Plan account be paid to someone other than you or your
BENEFICIARY.

"QUALIFIED DOMESTIC RELATIONS ORDERS" are court judgments, decrees, etc. that
pertain to child support, alimony, or marital property and that meet specific
legal requirements. The ADMINISTRATOR has procedures for determining whether a
court judgment or decree meets the specific legal requirements to be a QUALIFIED
DOMESTIC RELATIONS ORDER.

RETURN OF CONTRIBUTIONS TO YOUR EMPLOYER

If your EMPLOYER makes a contribution to the Plan on your behalf by mistake or
if your EMPLOYER cannot deduct a contribution made to the Plan on its tax
return, that contribution will be returned to your EMPLOYER in accordance with
Federal law.

                                       37
<PAGE>
                              TOP-HEAVY PROVISIONS

Federal law requires that the Plan contain certain provisions that become
effective only if the Plan becomes TOP-HEAVY. The Plan will become "TOP-HEAVY"
if the aggregate value of Plan accounts for certain officers and shareholders is
60 percent or more of the value of all assets held under the Plan. If the Plan
becomes TOP-HEAVY, specific minimum vesting and minimum benefits provisions
become effective. If the Plan becomes TOP-HEAVY, the ADMINISTRATOR will notify
you and give you additional details regarding these provisions.

                                       38
<PAGE>
                           MORE THINGS YOU SHOULD KNOW

Your EMPLOYER makes contributions to the Plan solely for your benefit. All the
assets of the Plan are held for the exclusive benefit of participants and their
beneficiaries. The Plan is qualified under the Internal Revenue Code as a
profit-sharing plan.

Even though the Plan generally provides for distribution after termination of
your employment, under certain circumstances which involve a termination of
employment with your EMPLOYER because of a sale of the business in which you
work, if you continue working for the successor employer you may not be eligible
for distribution of your Plan account until your employment terminates with the
successor employer and any companies related to it.

If your employment terminates with your EMPLOYER (and all RELATED COMPANIES)
before you are fully vested in your Plan account, you will lose the non-vested
portion of your Plan account.

The Plan does not make annuity payments from your Plan account. Your Plan
account is used to purchase an annuity contract from an insurance company. Once
an annuity contract is purchased from an insurance company, the Plan and its
fiduciaries have no further responsibility and do not guarantee your annuity
payments.

Because the Plan assets are held in individual accounts and are never less than
the total benefits payable to participants, no insurance of benefits by the
Pension Benefit Guaranty Corporation under Title IV of the Employee Retirement
Income Security Act of 1974 ("ERISA") is necessary or available. The Plan is
subject, however, to the applicable provisions of Title I of ERISA (protection
of employee benefit rights) and Title II of ERISA (amendments to the Internal
Revenue Code relating to retirement plans).

                                       39
<PAGE>
                           YOUR RIGHTS UNDER THE PLAN

The Plan is covered by ERISA, which was designed to protect employees' rights
under benefit plans. As a participant of the Plan, you should know as much as
possible about your Plan benefits. You are entitled to:

*        Examine, without charge, at the Plan administrator's office and at
         other specified locations, copies of all Plan documents and other Plan
         information filed by the Plan administrator with the U.S. Department of
         Labor, such as annual reports and Plan descriptions.

*        Obtain copies of all Plan documents and other Plan information, upon
         written request addressed to the Plan administrator and for which the
         Plan administrator may make a reasonable charge.

*        Receive from the Plan administrator at no charge a summary of the
         Plan's annual financial report.

*        Obtain a statement once a year, upon written request addressed to the
         Plan administrator, of your accrued benefits under the Plan and, if you
         are not fully vested, the earliest date on which you will have a
         nonforfeitable right to such benefits.

*        Obtain information as to whether a particular employer has adopted the
         Plan and, if so, the employer's address, upon written request addressed
         to the Plan administrator.

*        Receive a written explanation with respect to any denied benefit claim
         regarding the reasons for the denial and the steps you must take in
         order to have the denial reviewed and reconsidered.

ERISA imposes duties upon the people who are responsible for the operation of
the Plan. Such people are called "fiduciaries" and have a duty to act prudently
and in the best interest of participants and their beneficiaries. No one,
including your EMPLOYER, may fire your or otherwise discriminate against you in
any way to prevent you from obtaining a Plan benefit or exercising your rights
under ERISA.

                                       40
<PAGE>
There are steps you can take to enforce your rights under ERISA. Although the
ADMINISTRATOR carefully administers the Plan, if for some reason you believe
that you have been improperly denied a benefit or that your rights under ERISA
have been violated, you have a right to file suit in state or Federal court. If
you believe a Plan fiduciary has misused Plan funds, or if documents you have
requested are not furnished within 30 days (barring circumstances beyond the
Plan administrator's control), you have the right to file suit in Federal court
or request assistance from the U.S. Department of Labor. A court may award you
certain penalties (up to $110.00 per day) if the Plan administrator refused to
provide documents you requested, until you receive the documents. If you
disagree with the ADMINISTRATOR'S decision (or lack thereof) concerning the
qualified status of a domestic relations order, you may file suit in Federal
court. Service of legal process may be made upon the agent designated at the end
of this booklet.

The SPONSOR does not believe that filing suit will ever be necessary, but should
you feel that it is, the law protects you from being fired or otherwise
discriminated against to prevent you from enforcing your rights under ERISA.

After deciding your case, the court may also decide whether the losing party
should pay court costs and the legal fees and expenses of the winning party. If
you are successful, the court may order the party you have sued to pay these
costs and fees for you. However, if you lose, the court may order you to pay
theses costs and fees for the party you sued, for example, if the court finds
your claim to be frivolous.

If you have any questions, you should contact the Plan administrator at the
address indicated at the end of this booklet.

If you have any questions about this statement of your rights under ERISA, you
may contact the nearest Office of the Pension and Welfare Benefit
Administration, U.S. Department of Labor, listed in your telephone directory or
contact the Division of Technical Assistance and Inquiries, Pension and Welfare
Benefits Administration, U.S. Department of Labor, 200 Constitution Avenue,
N.W., Washington, DC 20210.

                                       41
<PAGE>
                             ADDITIONAL INFORMATION

PLAN ADMINISTRATOR

The Plan administrator (which may or may not also be the ADMINISTRATOR) is:
Comfort Systems USA, Inc., Three Riverway, Suite 200, Houston, TX 77056.

AGENT FOR SERVICE OF LEGAL PROCESS

Legal process may be served on:  Comfort Systems USA, Inc., Three Riverway,
Suite 200, Houston, TX 77056.  Legal process may also be served on the
TRUSTEE at its address listed below.

SPONSOR

The SPONSOR is:  Comfort Systems USA, Inc., Three Riverway, Suite 200,
Houston, TX 77056.

EMPLOYER IDENTIFICATION NUMBER

The SPONSOR'S Employer identification number for purposes of helping to
identify the Plan is:  76-0526487.

PLAN NUMBER

The Plan number for purposes of helping to identify the Plan is:  001.

TRUSTEE

The TRUSTEE is:  CG Trust Company, an Illinois Company, 525 West Monroe St.,
Suite 1900, Chicago, IL 60661-3629.

                                       42

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