# 54FR50525

Federal Register / Vol. 54, No. 234 / Thursday, December 7, 1989 / Notices 5f15:5

DEPARTMENT OF ENERGY

Office of Conservation and Renewable Energy

Energy Conservation Program for Consumer Products; Application for Interim Waiver and

. Petition for Waiver of Furnace Test Procedures From Lennox industries (F-018)

AGENCY .- Conservation and Renewable Energy Office, Department of'Energy.
SUMMARY. Today's notice publishes a letter granting an Application for an Interim Waiver from Lennox Industries' (Lennox) requesting relief from the existing Department of Energy (DOE) test procedures for furnaces regarding (a) blower time delay and (b) the determination of the off-cycle draft factor (Df) for Lenno)es G20 and G20R series atmospheric furnaees. Today's notice also publishes a "Petition for Waiver" from Lennox. The company's Petition for Waiver requests DOE to grant relief from the DOE test procedures relating to the blower time delay specification and in the determination of Df. Lennox seeks to test using a blower delay time of 45 seconds instead of the specified 1.5 minute delay between burner on-time and blower on-time and determining Df by tracer gas test measurements instead of the specified value of 1.0 for atmospheric burners- DOE is soliciting comments, data and information respecting the Petition for Waiver.
DATES : DOE will accept comments, data and information not later than January 8, 1990.
ADDRESSES :. Written comments and statements shall be sent to: Department of Energy, Office of Conservation and Renewable Energy, Case No. F-018, Mail Stop CE-132, Forrestal Building. 1000 Independence Avenue SW„ 

## Washington , DC 20585.

# 54FR50525

5052G Federal Register

FOR FURTH ER f.HF0Rt1AT iOH, C0NTACT Carl E. Adams, U.S. Department of Energy, Office of Conservation andRenewable Energy, Mail station CE132, Forrestal Building, 10100 Independence Avenue SW., w'Er'ashin ton, DC 20585, (202) 536-9127 Eugene Margolis, Esq., U.S. Department of Energy, Office of General Counsel, Mail Station GC-12, Forrestal Building,11000 Independence Avenue SW., Washington, DC 20585, (202) 530-9507.$

lw:a^ik^t'fT1Qt`iYd 

### The Energy Conservation Program for Consumer Products (other than automobiles) was established pursuant in the Energy Policy and Conservation Act (SPCA), Pub. L. 94-163, 89 Stat. 917, as amended by the National Energy Conservation Policy Act (NECPA), Pub. L. 95-619, 92 Stat. 3266, the National Appliance Energy Conservation Act of 1987 (N.AECA), Public Law 100-12, and the National Appliance Energy Conservation Amendments of 1988 (NA.ECA) Public Law 100-357, which requires DOE to prescribe standardized test procedures to measure the energy consumption of certain consumer products, including furnaces. The intent of the test procedures is to provide a comparable measure of energy consumption that will assist consumers in making purchasing decisions. These test procedures appear at 10 CFR Part 430; Subpart B. DOE has amended the prescribed test procedures by adding 10 CFR 430.27 on September 26, 1980, creating the waiver process. 45 FR 64108. DOE further amended the Department's appliance test procedure waiver process to allow the Assistant Secretary for Conservation and Renewable Energy (Assistant Secretary) to grant an interim waiver from test procedure requirements to manufacturers. 51 FR 42823, November 26, 1986. The waiver process allows the Assistant Secretary to waive temporarily test procedures for a particular basic model when a petitioner shows that the basic model contains one or more design characteristics which' prevent testing according to the prescribed test'procedures or when the prescribed test procedures may evaluate, the basic model in a manner so unrepresentative of its true energy consumption as to provide materially inaccurate comparative data. Waivers generally remain in effect until final test procedure amendments become effective, resolving the problem that is the subject of a waiver. The interim waiver provisions, added by the 1986 amendment, allow the Assistant Secretary to grant an interim 

## Vol. 54

, No. 234 / Thursday, December 7, 1989 / Notices

waiver when it is determined €hat the applicant will experience economic hardship if the Application for Interim Waiver is denied, if it appears likely that the Petition for Waiver will be 

## an ed. and/or the Assistant Secretary determined that it would be desirable for public policy reasons to o ant immediate relief pending a determination on the Petition for Waiver. On August 1, 1989, Lennox filed an Application for Interim Waiver regarding (a) blower time delay and (b) the determination of DI. The first part of Lennox's application seeks an interim waiver from the DOE test provisions that require a 1.5 minute time delay between the ignition of the burner and starting of the circulating air blower. Instead, Lennox requests the allowance to test using a 45 second blower time delay when testing its G20 and G20R series atmospheric furnaces. Lennox states that the 45 second delay is indicative of how these furnaces actually operate. Such a delay results in an energy savings of approximately 0.7 percent. Since current DOE test procedures do not address this variable blower time delay, Lennox asks that the interim waiver be granted. Previous waivers for this type of timed blower delay control have been granted by the Department to the Coleman Company, 50 FR 2710, January 18, 1985, the Magic Chef Company, 50 FR 41553, October 11, 1985, the Rheem Manufacturing Company, 53 FR 48574, December 1. 1988, and the Trane Company, 54 FR 19226, May 4, 1989. Thus, it appears likely that the Petition for Waiver will be granted for blower time delay. The second part of Lennox's application seeks an interim waiver from the DOE test procedure that requires the use of a 1.0 value for Df for an atmospheric furnace. The application states that the G20 and G20R series of atmospheric furnaces will incorporate an electromechanical burner box damper system that greatly restricts the flow through the heat exchanger whenthe damper is closed during the offcycle. Lennox claims the restriction of the damper is similar to the restriction of flow caused by a power burner during the off-cycle. Thus, it should be given a similar Df value as allowed for power burners. Lennox states that the current test method does not give credit for the energy savings due to the reduced flow and, as a result, provides materially inaccurate comparative data. To be able to take credit for the energy savings resulting from the reduced flow, Lennox requests a waiver from the furnace test procedure to allow Df to be determined by tracer gas test measurements and to use the calculations set forth in the test procedures for power burners. When tested using the tracer gas method for determination of Df, which is allowed in the test procedure for power burners, Lennox claims the G20 furnace indicates an Annual Fuel Utilization Efficiency (AFUE) which averages at least 4.0 percent higher than is indicated when tested under the current method of test for atmospheric furnaces using the specified value of 1.0 for Df. For the purpose of reducing off-cycle losses, there should be no difference between restricting the air flow through the heat exchanger by stopping the combustion air blower in a power burner and restricting the air flow by some sort of electromechanically operated damper. It appears likely that the Petition for Waiver will be granted for the determination of Df. Because Lennox's Petition for Waiver requesting relief from the DOE test procedures concerning blower time delay and the determination of Df appear likely to be granted, the company's Application for Interim Waiver on these subjects is granted. Pursuant to paragraph (b) of 10 CFR 430.27, DOE is hereby publishing the "Petition for Waivers" in its entirety. The petition contains no confidential information. DOE solicits comments, data, and information respecting the petition. In addition, pursuant to paragraph (e) of § 430.27 of the Code of Federal Regulations, the following letter granting the Application for Interim Waiver was issued to Lennox Industries.
Issued in Washington, DC, November 30, 1989. 

### Michael Davis, Assistant Secretary, Conservation and Renewable Energy.
November 39,1989. Mr. Hal H. Rhea, Vice President Research and Development, Lennox Industries, Inc., P.O. Box 677, Carrollton, Texas 75008
Dear Mr. Rhea: This is in response to your August 1, 1989, Application for Interim Waiver and Petition for Waiver from the Department of Energy (DOE) test procedures for furnaces when testing the company's G20 and GZOR series gas-fueled forced-air atmospheric furnaces regarding (a) blower time delay, and (b ) the determination of off cycle draft factor (Df). Previous waivers for timed blower delay control have been granted to the Coleman Company, 50 F.R. 2710, January 18, 1985, Magic Chef Company, 50 F.R. 41553, October 11, 1985, Rheem Manufacturing Company, 53 F.R. 48574, December 1,1988, and the Trane Company, 54 F.R. 19226, May 4

, 1989. It

# 54FR50525

Federal Registe

appears likely that Lennox ' s Petition for Waiver will be granted. For the purpose of reducing the off-cycle losses calculated by using Df, there should be no difference between restricting the air flow through the heat exchanger by stopping the combustion air blower in a power burxier and restricting the air flow by some sort of electro-mechanically operated damper. It appears likely that Lennox ' s Petition for Waiver concerning the determination of the off-cycle draft factor, Df. will be granted.. 

### Thus
, Lennox's Application for an Interim. Waiver concerning blower time delay and the Ietermination of the value of Df is granted for the reasons stated above. Lennox shall be permitted to test i ts C20 and C20R series of atmospheric furnaces on the basis of the test procedures specified in 10 CFR Part 430, with the modification set forth below. 

### (i) Section 9.3.1 of ANSI/AS-4R.AE Standard 103

- 1982 is deleted and replaced with the following paragraph: Gas- and Oil-Fueled Central Furnaces. After equilibrium conditions are achieved following the cool

-down test and the required measurements performed

, turn on the furnace and measure the flue gas temperature, using the thermocouple grid described above, at 0.5 and 2

. 5 minutes after the main burner(s)

comes on . After the burner start-up, delay the blower start

-up by 1

, 5 minutes (t-), unless: (1) 

## Vol. 54, No. 234 Thursday, December 7, 1989 / Notices 50527

The furnace employs a single motor to drive the power burner and the indoor air circulation blower, in which case the burner and blower shall be started together, (2) the furnace is designed to operate using an unvarying delay time that is other than 1.5 minutes, in which case the fan control shall be permitted to start the blower, or (3) the delay time results in the activation of a temperature safety device which shuts off the burner, in which case the fan control shall be permitted to start the blower

. In the latter case, if the fan control is adjustable

, set it to start the blower at the highest temperature. If the fan control is permitted to start the blower, measure time delay, (t-), using a stop watch

. Record the measured temperatures. During the heat-up test for oil-fueled furnaces, maintain the draft in the flue pipe with ±0.01 inch of water gauge of the manufacturer's recommended on-period draft. (iij Sections 8,9.2 and 8.9.2.1 of ANSI/ ASHRAE Standard 103

- 1982 to be deleted and replaced with the following: 8.9.2 Optional Methods for Determining Draft Factors Dp, Df, and Ds for Systems equipped with Power Burners or Draft Inducers or Atmospheric Systems with an Electro-Mechanical Device that Restricts theFlow Through the Heat Exchanger in the OffCycle. Draft Factors Dp

, Dt and Da are to be determined as described in 9.4. The tracer gas

Units without a stack damper but with draft hood or draft diverter TABLE 5.--INDOOR DRAFT FACTORS, FACTORS DESCFIBIMG AIR FLOW RATE FOR GAS AND OIL-FIRED NOM-CONDENSING FURNACES
OR BOILERS UTILIZING INDOOR AIR FOR COMBUSTION AND DRAFT CONTROL

Tyne of burner
System No.

Atmospheric 1 ............................ ............. ...... ........... ........................

Draft hoed or draft darter S/F

2.4 24 1.0

0.4 to

1.0 Ds 

### chosen for this task should have a density

which is less than or approximately equal to the density of air. Use a gas that is of a different chemical species or different concentration from the flue gas to be measured and unreactive with the environment to be encountered. 8.9.2.1 On power burner or induced draft systems not employing automatic stack dampers or systems with a stack damper and a draft diverter or draft hood or atmospheric systems with an electro-mechanical device that restricts the flow through the heat exchanger in the off-cycle, determine Df (the ratio of gas mass flow rate through the flue during the off-cycle to the gas mass flow rate through the flue during the on-cycle at identical temperatures) during the cool-down test described in 9.1 (iii) The title of Section 9.4 of ANSI/ ASI-IRAE Standard 103-1982 to be deleted and replaced with the following title: 9.4 Optional Test Procedures for Determining Draft Factors for Dp, Elf, and Ds for Systems Equipped with Power Burners or Induced Draft Fans or for Atmospheric Systems with an Electro-Mechanical Device that Restricts the Flow Through the Heat Exchanger in the Off Cycle. 

### (iv) Tables 8 and 7 of ANSI/ASHRAE Standard 103-1982 to be deleted and replaced with the following tables:

S

1.0 0.85 . Barometric draft control

em 

### No

. 

# P S/F 

# I of

1.0 0.4

Units With a Stack Damper and

Barometric draft control Ds

System No. SfF Of Ds System PIn. ^ S%F Df

5 2.4 1.r0 Co....._...._ ...... ............:............ .................... ............................. 7 1.4 1.0

L t)- Fi 2.4 0

.4 Do ...........................:...................._..........................:......._.. 1a 0.3 i o w( rv^

# 54FR50525

50 528

where 0.4, if Do<1/(S/F)



### 'Ds=Df=0.4 S/F=1 `See 11.4 second paragraph for direct exhaust units employing forced or induced draft, or power burners that utilize indoor air and have no draft control device. *A power burner may incorporate a device on its air inlet which opens when the applicance is in operation and closes the air inlet when the appliance is in the standby condition.+Atn atmospheric furnace with an electromechanical device that restricts the flow through the heat exchanger in the off-cycle may be tested as a system 2 with Df=1.0 or as determined by the optional test procedure described in section 9.4.

TABLE 7.-I1-IDOOR DRAF T FACTO RS, OUTDOOR DRAFT FACTORS

, FACTORS DESCRIBiNG AIR FLOW RATE FOR GAS OR
COIL-FIRED FURNACES /BOILERS INTENDED FOR INSTALLATION OUT -F-DOORS; IN UNHEATED SPACES (SUCH AS AN
ATTIC OR CRAWL SPACE); OR INTENDED
FOR INDOOR iNSTALLt?TION BUTEQUIPPED WITH A DIRECT VENT SYSTEM AND ALL CONDENS ING FURNACES
09 BOILERS

Units without a stack or Type of flue damper Burner System No. Df

Atmospher- 9 ..................... 1.00 ............. 

### ic. Power°.......... 10+..._.......... 0.40._.............

Units with a flue damper Type of d ,aft S/F

System No. 11....._... Dl..... ............. None ......

.......

Do .................. Barometric 1.4

Damper. 12........... 0.4XDo......... Draft 2.4

I Diverter. 1

_'Also includes forced and induced draft equipment. +An atmospheric furnace with an electromechanical device that restricts the flow through the heat exchanger in the off-cycle may be tested as a system -10 with Dt=1.0 or as determined by the optional test : procedure described in section 9.4.

This interim waiver is based upon the presumed validity of statements and all allegations submitted by the company. This interim waiver may be revoked or modified at any time upon a determination that the factual basis underlying the application is incorrect. The interim waiver shall remain in effect until the Department of Energy issues a determination on Lennox's Petition for waiver. 

## Federal Register / Vol. 54, No. 234 / Thursday, December 7, 1989 / Notices

D9 = 0.4+(0.4) (Do))(Do-1/(S/9,



### Do(1-1/(S/F)) if Do>1/(S/F)

Sincerely, J. Michael Davis, P.E. Assistant Secretary, Conservation and Renewable Energy. August 1, 1989. 

### Assistant Secretary, Conservation and Renewable Energy, United States Department of Energy 1000 Independence Avenue SW., Washington, DC 20585 Dear Sir: This is a petition for waiver submitted pursuant to Title 10 CFR Part 430.27. Waiver is requested from the uniform test method for measuring energy consumption of furnaces. In the interest of saving energy, Lennox Industries Inc. has developed a series of atmosspheric G20:.and G20R furnaces which will utilize a 45 second fixed ti me delay blower relay. Waiver is requested from the 1.5 minute time delay requirement between the burner ignition and indoor blower activation in the heat-up portion of the test as outlined in Appendix N to Subpart B of Part 430 (Section 9.3.1 of A23SI/ASHRAE 103-82). We have found that under the current method of test the flue gas temperature as measured in the stack reaches a value which is higher than will be seen in actual operation resulting in inaccurate comparative data. Our test data indicates that an energy savings of approximately 0.7% on the AFUE is achievable with this reduction in blower delay. Previous waivers for this type of timed blower delay control have been granted to the Coleman Company (50 FR 2710, January 18, 1985), Magic Chef Company (50 FR 41533, October 11, 1985), and Rheem Manufacturing Company (53 FR 48574, December 1, 1988). We are requesting that Lennox Industries Inc. be permitted to test its G20 series and G20R series of furnaces on the basis of the test procedures specified in 10 CFR part 430 with the following modification: Section 9.3.1 of ANSI/ASIRZAE Standard 103-82 to be deleted and replaced with the following paragraph: Gas--and Oil-Fueled Central Furnaces. After equilibrium conditions are achieved following the cool -down test and the required measurements performed, turn on the furnace and measure the flue gas temperature, using the thermocouple grid described above, at 0.5 and 2.5 minutes after the main burner(s)

comes on . After the burner start-up, delay the blower start-up by 1. 5 minutes (t-), unless: (1) The furnace employs a single motor to drive the power burner and the indoor air circulation blower, in which case the burner and blower shall be started together, (2) the furnace is designed to operate using an unvarying delay time that is other than 1.5 minutes , in which case the fan control shall be permitted to start the blower, or (3) the delay time results in the activation of a temperature safety device which shuts off the burner, in which case the fan control shall be permitted to start the blower. In the latter
case, if the fan control is adjustable
, set it to 

### start the blower at the highest temperature. If the fan control is permitted to start the blower, measure time delay, (t-), using a stop watch. Record the measuredtemperatures. During the heat-up test for oilfueled furnaces, maintain the draft in the flue pipe within -x-0.01 in. of water gauge of the manufacturer's recommended on-_period draft. The G20 and G20R series of atmosphericfurnaces will also incorporate an electromechanical burner box damper system that greatly restricts the flow through the heat exchanger when the damper is closed during the of'-cycle. This is similar to the restriction of flow caused by a power burner during theoff-cycle. Because the damper Is electromechanically operated, opening and closing times are of the same order as times required to bring a combustion air blower up to speed/ prove air flow (10 sec) and for the blower impeller to slow down after power is removed (3 sec). The current test method does not give Lennox credit for the energy savings due to the reduced flow and as a result provides materially inaccurate comparative data. To be able to take credit for the energy savings resulting from the reduced flow, Lennox Industries Inc. requests a waiver from the furnace test procedure as described in Appendix N to Subpart B of Part 430 to allow the off-cycle draft factor Df to be determined by tracer gas test measurements and calculations similar to a method that can be employed on power burners. Under the current test procedure as specified in Appendix N to Subpart B of Part 430 (Section 8.9.1 and Draft Factor Tables B and 7 of ANSI/ASHRAE 103-82) the draft factor Df is set to a default value of 1.00 for an atmospheric furnace. When tested by tracer gas measurement as is specified for power burners in Section 9.4 of ANSI/ASI-IRAE 103- 82, the draft factor Df was found to be In the range of .20 to .30 resulting in a greatly reduced energy loss. Lennox requests that the draft factor Df be calculated as for a power burner as is specified in ANSI/ASHRAE 103- 1982. In this way, the actual flow during the off cycle and the resultant energy loss would 'be determined by test measurement rather than by the assumed draft factor specified in the procedure. When tested using the tracer gas method for determination of draft factor Df as described above, the G20 furnace indicates an Annual Fuel Utilization Efficiency (AFUE) which averages at least 4.0% higher than is indicated when tested under the current method of test for atmospheric furnaces using the default value of 1 .00 for Df. We feel that the homeowner should be allowed to take advantage of the energy savings which this efficiency increase represents. We are requesting that Lennox Industries Inc. be permitted to test its G20 series and G20R series of furnaces on the basis of the test procedures specified in 10 CFR part 430 with the following modifications;

## 54FR50525 Federal Register / Vol. 54, No. 234 / Thursday, December 7, 1989 / Notices

(1) Sections 8.9.2 and 8.9.2.1 of ANSI/ ASHRAE Standard 103-1982 to be deleted and replaced with the following: 8.9.2 Optional Methods for Determining Draft Factors Dp, Df, and Ds for systems equipped with Power Burners or Draft Inducers or Atmospheric Systems with an Electro-Mechanical Device that Restricts theFlow Through the Heat Exchanger in the OffCycle. The tracer gas chosen for this task should have a density which is less than or approximately equal to the density of air. Use a gas that is of a different chemical species or different concentration from the flue gas to be measured and unreactive with the environment to be encountered. 8.9.2.1 On power burner or induced draft systems not employing automatic stack dampers or systems with a stack damper and a draft diverter or draft hood or atmospheric systems with an electro-mechanical device that restricts the flow through the heat exchanger in the off-cycle determine Df (the ratio of gas mass flow rate through the flue during the on-cycle at identical temperatures) during the cool-down test described in 9.2. (2) The following section to be added to ANSI/ASHRAE Standard 103-1982: 8.9.2.3 Optional Methods for determining Draft Factors Dp, Df, and Us on atmospheric systems with an electro-mechanical device that restricts the flow through the heat 

## 5 529

exchanger in the off-cycle. Draft factors to be determined as is described in 9.4. (3) The title of Section 9.4 of ANSI/ ASHRAE Standard 103-1982 to be deleted and replaced with the following paragraph: 9.4 Optional Test Procedures for Determining Draft Factors for Dp, DL and Ds for Systems Equipped with Power Burners of Induced Draft Faris or for Atmospheric Systems with an Electro-Mechanical Device that Restricts the Flow Through the Heat Exchanger in the Off-Cycle. 4) Tables 5 and 7 of ANSI/ASHRAE Standard 103-1982 to be deleted and replaced with the following tables:

TABLE 6.-INDOOR DRAFT FACTORS, FACTORS DESCRIBING AIR FLOW RATE FOR GAS AND OIL-FIRED. NON-CONDENSING FURNACES
OR BOILERS UTILIZING INDOOR AIR FOR COMBUSTION AND DRAFT CONTROL

Type of burner

System No.

Atmospheric 1 ...............................................................................:..... Power' 2'+ ........................................................................................ Units without a stack damper but with draft hood or draft divorter

S/F I of I Ds

2.4 2.4 1.0

0.4 1.0

1.0

Units with a stack damper and System No.

1.0 0.4 1.0

0.85

Draft hood or draft diverter Barometric draft control System No. S/F Of Ds System No. S/F Of Ds

5 6 2.4

2.4 1.0

0.4 Do .................................................................................................... Do ................................................................................................ 7 8 1.4

1.4 1.0

0.4 Do (Do)(Dp')

where 0.4, if Do ' 1/(S/F)

Dp'=0.4+(0.85-(0.4)(Do))(Do-1/(S/F)), if Do > i/(S/F)

Do91-1/(S/F))

'Ds=Df=-0.4 S/F=1 "See 11.4 second paragraph for direct exhause units employing forced or induced draft, or power burners that utilize indoor air and have no draft control device. "A power burner may incorporate a device on its air inlet which opens when the appliance is in operation and closes the air inlet when the appliance is in the standby condition.+An atmospheric furnace with an electromechanical device that restricts the flow through the heat exchanger in the off-cycle may be tested as a system 2 with Df=1.0 or as determined by optional test procedure. TABLE 7.-OUTDOOR DRAFT FACTORS, FACTORS DESCRIBING AIR FLOW RATE FOR GAS OR OIL-FIRED FURNACES/ BOILERS INTENDED FOR INSTALLATION OUT-OF-DOORS ; IN UNHEATED SPACES (SUCH AS AN ATTIC OR CRAWL SPACE);OR INTENDED FOR INDOOR INSTALLATION BUT EQUIPPED WITH A DIRECT VENT SYSTEM AND ALL CONDENSING FURNACES OR BOILERS

Type of burner

A.tmospher1c. Power ' ..........

Units with a it

System No. 11 _ Units without a stack or

flue damper System No.

......... 10+.__ of

1-00 ...............

0.40 ...............

ue damper

Do...... ............ Barometric

Type of draft

of ................... None.............. S/F

1 1.4 TABLE 7.-OUTDOOR DRAFT FACTORS,

FACTORS -DESCRIBING AIR FLOW RATE

FOR GAS OR OIL-FIRED FURNACES!

BOILERS INTENDED FOR INSTALLATION OUT-OF-DOORS; 04 UNHEATED SPACES (SUCH AS AN ATTIC OR CRAWL SPACE);

OR INTENDED FOR INDOOR INSTALLATION BUT EQUIPPED WITH A DIRECT

VENT :SYSTEM AND ALL CONDENSING

FURNACES OR BOILERS-Col itnued

Units without a stack or Type of flue damper burner System No. Df

2.4 12...........1 0.40 x Do ......1 cD;aft Barometric draft control

S/F of Ds

3
4



# I Diverter.
'Also includes forced and induced draft equipmer t.+An atmospheric furnace with an electromechanical device that restricts the flew through the heat exchanger in the oft-cycle may be tested as a system 10 with Df=1.0 or as determined by optional test procedure.
Damper.

## 50530 54FR50525 Federal Register / Vol. 54, No. 234 / Thursday, December 7, 1989 / Notices.

At the initial meeting of ASHRAE SPC 103- 1988 on June 28, 1989, it was recommended that the 103 standard be revised to allow tracer gas to be used on atmosphere furnaces as an optional method for determining draft'factors. There were no objections, and a subcommittee is being formed to review the recommendation. We suggest. that the SPC 103-1988 committee accept our proposed revisions and propose that DOE adopt the revised standard as the basis for the DOE test procedure. 

### Sincerely, Lennox Industries Inc. Hal H. Rhea, Vice President, Research and Development. [FR Doc. 89-28612 Filed 12-6-89; 8:45 am]
BILLING CODE 6456-O1-M