## Monday August 23, 1993



# Part II


# Department of Energy

Office of Energy Efficiency and Renewable Energy



## 10 CFR Part 

## 430 Energy Conservation Program for Consumer Products; Proposed Rule

### 44538 

### Federal R.egister I 

### Vol. 58, No. 161 / Monday, August 23, 1993 / Proposed Rules

DEPARTMEi'oiT OF ENERGY

Office of Energy Efficiency and Renewable Energy



### 10 CFR Part 

### 430
[Docket No. EE-RM-93-501]


### Energy Conservation Program for Consumer Products: Test Procedures for FumacesIBollers. Vented Home Heating Equipment, and Pool Heaters

AGENCY: 

### Office ofEnergy Efficiency and Renewable Energy, Department of Energy.
ACTION: 

### Proposed Rule and Public Hearing.

SUMMARY: 

### The Energy Policy and Conservation Act. as amended, requires the Department ofEnergy (DOE or the Department) to administer an energy conservation program for certain major household appliances and commercial equipments. Among other program elements, the Act requires that standard methods oftesting be prescribed for each covered product. The purpose of today's notice ofproposed rulemaking is
to update references. request data, comments, and information on proposed amendments to the furnaces and boilers, vented home heating equipment, and poel heater test pocedures.

- DATES: 

### Written comments in response to this document must be received by November 22, 1993.

Oral views, data, and arguments may be presented at the public hearing to be held on Monday, September 20,1993. Requests to speak at the hearing must be received by the Department no later than 5 p.m., Friday, September 10, 1993. Ten (10) Copies of statements to be given at the public hearing must be received by the Department no later than 5 p.m

.. Wednesday. September 15. 1993.
AOGRESSES: 

### Written comments and requests to speak at the public hearing

are to be submitted to: 

### u.s. Department ofEnergy, Office of Energy EffiCiency and Renewable Energy, Hearings and Dockets, "Test Procedures for Furnaces/ Boilers, Ver:ted Home Heating Equipment, and Pool Heaters," (Docket No. EE-RM-93-501), Forrestal Building, 1000 Independence Avenue SW., Washington, DC 20585, (202) 586-D561.

The hearing will begin at 9:30 a.m

.. and will be held at the U.S. Department ofEnergy, Forrestal Building, Room 1E245, 1000 Independence Avenue, SW., Washington, D.C.

Requests may be hand delivered to such address hetween the hours of 8

a.m. and 4 

### p.m., Monday through Friday, except Federal holidays. Requests should be labeled "Furnaces, Vented Home Heating Equipment. and Pool Heaters Test Procedures," (Docket No. EE-RM-93-501), both on the document and on the envelope.

Copies ofthe transcript ofthe public hearing and public commentsreceived may be read and/or photocopied at the DOE Freedom ofInformation Reading Room, U.S. Department ofEnergy, Forrestal Building. Room 1E-190. 1000 Independence Avenue SW., Washington, DC 20585, (202) 586--£020, between the hours of 9 a.m. and 4 p.m., Monday through Friday, except Federal holidays.

For more information concerning public participation in 

### this rulemaking proceeding, see section 

## vm of

### the
"SUPPLEMENTARY INfORMATION."
fOR fURTHER INfORMAnON CONTACT: 

### Cyrus H. Nassefi, U.S. Department of

Energy, Office ofEnergy Efficiency and Renewable Energy, Mail Station EE-431, Forrestal Building, 1000 Independence Avenue, SW.• Washington, DC 20585, (202) 586- 

### 9127. Eugene Margolis, Esq. U.S. Department

of

### Enf'rgy, Office of G.maral 

### Counsel, Mail Station GC-41, Forrestal Builciing, 1000 Independence Avenue, SW., Washington, DC 20585, (202)
586--9507.

SUPPlEMENTARY INfORMATION:


### I. Introduction

A. 

### Authority

Part B ofTitle III ofthe Energy Policy and Conservation Act, Public Law 94- 163. as amended by the National Energy Conservation Policy Act, Public Law 95-£19, the National Appliance Energy Conservation Act of 1987, Public Law 100-12, the National Appliance Energy Conservation Amendments of 1988. Public Law 100-357 and the Energy Policy Act of 1992, Public Law 102-486, croated the Energy Conservation Program for Consumer Products other than Automobiles (Program}.1 The 13-

consumer household products currently subject to this Program (often referred to hereafter as "covered products") include furnacesfboilers. vented home heating equipment, and pool heaters. the subject oftoday's document.

Under the Act, the Program consists essentially ofthree parts: testing, labeling, and Federal energy conservation standards. The Department, in consultation with the

1 Part B of title III of Energy Policy and Conservation Act. as amended. is refaned to in this final rule as the "Act". Part B ofTitle ill is codified
at 42 U.S.c. 6291-6309. 

### National Institute of Standards and Technology (formerly the National Bureau of Standards), is required to amend or establish new test procedures

as appropriate for each ofthe covered products. Section 323. The purpose of the test procedures is to produce test results which measure energy efficiency, energy use. or estimated annual operating cost of a covered product during a representative average

use cycle or period ofuse and must not be unduly burdensome to conduct. Section 323(b)(3). A test procedure is
not required if

### DOE determines by rule that one cannot be developed. Section 323(d)(1). One hundred and eighty days after a test procedure for a product is adopted, no manufacturer may represent the energy consumption of, or the cost ofenergy consumed by, the product except as reflected in tests conducted according to the DOE procedure. Section 323(c)(2). Test procedures appear at 10 Code ofFederal Regulations, part 430, subpart B.

However, the 180-day period referred
to in section 323(c)(2) may be extended for a period ofup to an additional 180 days if

### the Secretary determines that the requirements of section 323(c)(2) WOi:

### ld imfc>se un'due burden. Section 323(c)(3). Labeling requirements for major household appliances are administered by the Federal Trade Commi.ssion.

Section 323{e) ofthe Act requires DOE to determine to what extent, if

### any.

a proposed test procedure would alter the measured energy efficiency or , measured energy use of any covered product as determined under the existing test procedure. 

### IfDOE determines that an amended test procedure would alter the measured efficiency or measured energy use of a covered product, DOE is required to amend the related energy conservation standard accordingly. In determining the amended ste.ndard, DOE is required
to measure the e!1ergy efficiency or energy use ofrepresentative samples of covered products which minimally comply with the existing standard. The average efficiency of these representative samples, tested using the amended test procedure, constitutes the amended standard. Sec"tion 323(e)(2).



### B. Background

Today's document proposes to modify the test procedures for furnaces and boilers, vented home heating equipment, and pool heaters as follows: (1) 

### DOE proposes to modify the test procedure for furnaces and boilers to incorporate waivers previously granted and to include test procedures for new product designs. The revised American

### Federal R.egister I 

### Vol. 58. No. 161 I 

### Monday. August 23. 1993 I 

### Proposed Rules 44539

National Standards Iristitutel American Society ofHeating. Refrigerating. and Air-Conditioning Engineers Standard 103-1988 

### will be referenced. and test procedures will be included fOf atmospheric furnaces with burner air inlet dampers or flue dampers. jacket loss measurement for downflow furnaces. and electro-mechanical stack dampers with delayed opening and
power vented units employing post purge during the off-cyde. Additionally. today's document establishes a minimum required blowefdelay time between the ignition ofthe burner and the starting ofthe circulation air blower.

a maximum on-time fOf the circulation air blower after the burner shut-off. and othercorrections and technical revisions to those sections ofAmerican National Standards Institute! American Society ofHeating. Refrigerating. and Air-Conditioning Engineers Standard 103-1988 

### incorporated into the OOE test procedure. Today's document also modifies the Energy FactorDescriptorto include theuseful heat generated by the electrical consumption and establishes

an additional new annual efficiency descriptor that includes the auxiliary electrical energy consumption of appliances when installed indoors and that could be used in determining the energy rating ofmobile home furnaces. (2) OOE proposes to modify the test procedure for vented home heating equipment by establishing an additional

new annual efficiency descriptor that includes the auxiliary electrical energy consumption in determining the energy rating ofthe appliance. and by including modified calculation procedures for the weighted average steady-state efficiency and Annual Fuel Utilization Efficiency for manually controlled heaters. (3) OOE proposes to modify the test procedure for pool heaters by establishing an additional

new annual efficiellcy descriptor that includes the auxiliary electrical energy consumption in determining the energy rating ofpool heaters.

The above modifications ofthe test procedures for furnaces and boilers. vented home heating equipment. and pool heaters will not change the related existing energy conservation standards for these appliances. However. the Department has determined that additional new energy descriptors may need to be made available when it is found that the existing descriptors do
not account for all ofthe energy or all types ofenergy consumed by an appliance. Not having these new energy descriptors would result in the analyses for energy conservation standards being incomplete and could lead to standards which could be met by utilizing unaccounted for energy that might satisfy an energy descriptorbut result in little or no total energy savings. Examples ofunaccounted for energy are the pilot light energy ofa pool heeter which is not accounted for by the
current energy descriptor ofthennal efficiency or the electrical energy ofa furnace or ventedhome heating equipment which is 

### not accounted for by the current energy descriptor of Annual Fuel Utilization Efficiency. Accordingly. the Department is proposing in today's document to include new energy descriptors for vented hO,me heating equipment. furnaces. and pool heaters.

II. Discussion

A. 

### Furnace Test Procedure

On March 28. 1984. 

### theDepartment published in the Federalltegistera final rule amending the test procedures for furnaces. vented home heating equipment. and unvented home heating equipment. (Hereafter referred to as the 1984 

### Final Rule.) 49 

### FR 12148.



### The 1984 

### Final Rule referenced the American National Standards Institute! American Society ofHeating. Refrigerating. and Air-Conditioning Engineers Standard 103-1982 

### entitled "Methods ofTesting for Heating Seasonal Efficiency ofCentral Furnaces and Boilers." In addition. it 

### prescribed
test procedures for furnaces and boilers that were not covered adequately by the American National Standards 

### Institutel American Society ofHeating. Refrigerating. and Air-Conditioning Engineers Standard 103-1982. 

### The 1984 

### Final rule included provisions for modulating furnaces and boilers. condensing furnaces and boilers. units with thermal stack dampers. and other technical ravisions (including oversize factors offurnaces and boilers. furnaces without draft reliefor direct exhaust system. hot water boiler specifications

on minimum return inlet water temperature and minimum water temperature rise. pump delay boiler controls. improved method for the determination ofthe steady state stack
to flue mass flow factor for furnaces and boilers. and option of an assigned jacket loss value in lieu ofactual measurement). Subsequently. the Standards Project Committee 103 

### of American Society of Heating. Refrigerating. and Air-Conditioning Engineers revised the American National Standards Institute!American Society ofHeating. Refrigerating. and Air-Conditioning Engineers Standard 103-1982 

### to include DOE 1984 

### amendments that were not covered adequatelyby the Standard. The resulting Standard. "MethodsofTesting for Annual Fuel Utilization Efficiency of Residential Central Furnaces and Boilers." was designated American National Standards Institute! American Society ofHeating. Refrigerating. and Air-Conditioning Engineers Standard 103-1988.



### Since 1984. through cooperative efforts with the furnace industry and through OOE test procedure waiver process. OOE has become aware of several additional furnace test procedure issues. OOE proposes to amend the furnace test procedure to address these issues:

1. 

### American National 

### Standards Institute! American Society ofHeating. Refrigerating. and Air-ConditiQning Engineers Standard 103-1988



### American National Standards Institute! American Society ofHeating. Refrigerating. and Air-Conditioning Engineers Standard 103-1988

### which revised the earlier 1982 

### standard. is being referenced in Appendix N to subpart B ofpart 430 

### with certain exceptions in the present OOE proposed
test procedure for furnaces. One exception concerns furnaces and boilers that include small air passages in the flue that serve a utility other than for draft relief (see section 3.9 

### ofthe 1984 

### furnace test procedure and sections 8.2.1.2.2 

### and 8.3.1.2.1 

### ofAmerican National Standards Institute!American Society ofHeating. Refrigerating. and Air-Conditioning Engineers Standard 103-1988). 

### In 

### DOE test procedure. the criterion for conSidering these units as direct exhaust systems is that air flow through the air passages shall not be in

excess of 10 

### percent ofthe maximum steady-state total flue flow. In the American National Standards Institutel American Society ofHeating. Refrigerating. and Air-Conditioning Engineers Standard 103-1988. 

### the criterion is that the area ofthe passage opening shall not be 

### more than 10 

### percent ofthe**cross-~ectional** 

### area ofthe stack. TheDepartment recognizes the difficulty and accuracy problems involved in the measurement ofthe air flow rate through the small air passage under the existing test procedure and is proposing to use the 

### American National Standards Institutel American Society of Heating. Refrigerating. and AirConditioning Engineers Standard 103- 1988 

### criterion.

The 1984 

### Final Rule and the American National Standards Institute! American Society ofHeating. Refrigerating. and Air-Conditioning Engineers Standard 103-1988 

### also differ

## 44540 Federal Register 

### I 

### Vol. 58, No. 161 I 

### Monday, August 23, 1993 I 

### Proposed Rules

with regard to the calculation procedure for units with an electro-mechanical stack damper. An error in the calculation procedure for the stack damper in American National Standards Institutel American Society ofHeating. Refrigereting, and Air-Conditioning Engineers Standard 103-1988 (discovered by the American Society of Heating, Refrigerating, and AirConditioning Engineers Standard Project Committee 103 after the standard was published) results in an overstated Annual Fuel Utilization Efficiency value. DOE is proposing to adopt a corrected calculation procedure. See 

### Appendix N to Subpart B ofpart 430. Section 7.6. and 10.7.

A third difference between DOE current furnace test procedure and the American National Standards'Institutel American Society ofHeating. Refrigerating. and**Air~Conditioning** 

### Engineers Standard 103-1988 concerns air circulation blower delay, both during the heat-up test (delay in starting after burner ignition) and during the cooldown test (delay in stopping after burner shut-oCO. During the heat-up test. the DOE test procedure requires a blower time delay of 1.5 minutes with two exceptions. The American National Standards Institutel American Society of Heating, Refrigerating, and AirConditioning Engineers Standard 103- 1988 added a third exception: if

### the furnace is designed to operate with an unvarying time delay, the delay shall be

as designed. During the cool-down test. the DOE test procedure allows a 3- minute (1.5 minutes for condensing furnaces) delay in blower shut-offor until the supply air temperature drops below 40°F above the inlet air temperature, whichever results in the longer blower on time. The American National Standards InstitutelAmerican Society ofHeating, Refrigerating, and Air- Conditioning Engineers Standard 103-1988 added the additional exception that for furnaces without adjustable fan control. the delay shall be

as designed.

DOE is modifying both ofthese added exceptions in American National Standards Institute/American Society of Heating. Refrigerating. and AirConditioning Engineers Standard 103- 1988 in the proposed test procedure. See appendix N to subpart B ofpart 430, sections 8.4, and 8.7.

2. Furnaces and Boilers With Small Air Passage in the Flue

The Department's current test procedure prescribes the ratio ofthe air flow rate through the small air passage to the flue gas rate through the stack (10 percent) as the criterion in determining whether the unit is tested as a direct exhaust system. The American National Standards Institutel American Society of Heating, Refrigerating. and AirConditioning Engineers Standard 103- 1988 specifies the area ratio (10 percent)

as the criterion. DOE recognizes the difficulty involved in measuring the air flow rate through the small passage, and is proposing to adopt the area ratio of 10 percent (tested and accepted by the National Institute ofStandards and Technology) as the appropriate criterion.
3. Electro-mechanical Stack Dampers

The DOE current test procedure for furnaces evaluates the effectiveness ofa stack damperby comparing the area of the damper plate to the area ofthe stack. assuming instantaneous damper closing and without time delay after the burner is shut off. DOE realizes, however, that this simplified evaluation method likely results in overstatements ofefficiency (this has been verified by National Institute ofStandards and Technology experimentally). The calculation procedure in the American National Standards Institute/American Society of Heating. Refrigerating. and AirConditioning Engineers Standard 103- 1988 accounts for the time delay and specifies the finite length oftime it takes for the damper to close. DOE is proposing to adopt this method for units with electro-mechanical stack dampers. See appendix N to subpart B ofpart 430. sections 7.6, and 10.7.

.

There was, however. an error as mentioned previously in the American National Standards InstitutelAmerican Society ofHeating. Refrigerating, and Air-Conditioning Engineers Standard 103-1988 calculation procedure. In the procedure. a stack damper effectiveness factor Do (defined as the ratio ofthe offcycle sensible loss with the damper in operation to the off-cycle sensible loss without the damper) was used to calculate the stack gas draft factor D•. The stack gas temperature measured with the damper open was used incorrectly in the numerator for the stack damper effectiveness Do. This can result in an overstatement ofthe Annual Fuel Utilization Efficiency by 1 to 2 percentage points for a damper with a large leakage area and long delay time. The correct temperature should have been the calculated temperature with the damper in operation (determined by National Institute of Standards and Technology). The American National Standards InstitutelAmerican Society of Heating. Refrigerating. and AirConditioning Engineers Standard 103- 1988 procedure also simplifies the calculation incorrectly by applying the factor Do to both the off-cycle sensible loss and off-cycle infiltration loss.a This simplification can result in an understatement ofthe Annual Fuel Utilization Efficiency by 0.2 to 1 percentage point. depending on the damper leakage area and delay time. The correct procedure is the application ofa separate stack dampereffectiveness factor for infiltration loss. defined the

same way as the factor Do for sensible loss, to the off-cytle infiltration loss calculation. DOE has included the corrected procedure to American National Standards InstitutelAmerican Society ofHeating, Refrigerating. and Air-Conditioning Engineers Standard 103-1988 in this document. See appendix N to subpart B ofpart 4:l0. section 10.7.

Both DOE current test procedure and the American National Standards Institutel American SOCiety ofHeating. Refrigerating. and Air-Conditioning Engineers Standard 103-1988 require geometrical measurements for the stack damper to be the cross-sectional area of the stack and the net area ofthe damper (area ofdamper minus any cut-out or holes). However, since there are dampers that when closed will permit air to leak around the edge and shaft of the damper. this leakage area should be included as part ofthe data required. DOE has included this requirement in today's proposal. See appendix N to subpart B ofpart 430, section 7.6.
4. Thermal Stack Damper

The 1984 Final Rule has no provision for direct measurement ofoff--cycle heat losses by measuring the concentration of

a tracer gas in the flue and in the stack during an appropriate off-cycle period. The procedure for thermal stack dampers is not included in the American National Standards Institute/ American Society ofHeating, Refrigerating. and Air-Conditioning Engineers Standard 103-1988. The wide variation ofperformance ofthermal stack dampers (such as sluggish closing time and variable leakage rate) requires

a continuous measurement ofthe traCl'r gas concer.tration over the entire offcycle period (or discrete time measurements with small time steps). This. however. would introduce significant measurement errors in the beginning ofthe off-cycle period (when losses are the greatest) because ofthe rapid decrease in stack gas flow rate and temperature and slow response oftracer gas sensors and analyzers. Therefore,

• "The Effect of a Time-Delayed Stack Damper 00 Off-Cycle Heat Losses for Residential Heating Equipment," American Society ofHeating, Refrigerating, and Air-conditioning Engineers Transactions 1983, V.89.

### Federal Register 

### I Vol. 58, No. 161 

### I Monday, August 23, 1993 

### I Proposed Rules 44541

DOE will continue to reserve the provision for 

### thennal stack dampers pending development oftesting details and a calculation procedure as discussed in the 1984 Final Rule. See 

### 49 FR 12148, 

### March 28.1984. and appendix N 

### to subpart B ofpart 430. section 10.28.

5. 

### Air 

### Circulation BlowerDelay at Burner Ignition

The current furnace test pJ:OCadure requires a 1.S-minute delay between the ignition ofthe burner and the start-up ofthe blower. Since 1984. numerous manufacturers have requested. and OOE has 

### granted, waivers from this requirement to accommodate the unvarying time delay designed into their units. Themanufacturers' waivers include: Coleman Company, 50 FR 2710, January 18, 1985; Magic Chef Company, 50 

### FR41553, October 11, 

### 1985; 

### Rheem Manufacturing Company. 53 FR 48574, December I, 

### 1966, 56 FR 2920. January 25, 1991.57 FR 10166, March 24. 1992. and 57 FR 34560. August 5,1992; Trane Company, 54 FR 19226, May 4, 1989, 56 FR 6021. February 14. 1991, 57 FR 10167, March 24. 1992. and 57 FR 22222, May 27. 1992; Lennox Industries. 55 FR 50224. December 5, 1990; Inter-City Products Corporation. 55 FR 51487. December 14. 1990. and 56 FR 63945. December 6, 1991; DMO Industries. 56 FR 4622. February 5, 1991; Heil-Quaker Corporation, 56 FR 6019, February 14. 1991; CarrierCorporation, 56 FR 6018. February 14. 1991. and 57 FR 38830. August 27, 1992; Amana Refrigeration Inc.• 56 FR 27958, June 18. 1991.56 FR 63940, December 6.1991. and 57 FR 23392. June 3. 1992; Snyder General Corporation. 56 FR45960. September9. 1991; Goodman Manufacturing Corporation. 56 FR 51713. October 15. 1991. and 57 FR 27970. June 23.1992; Ducane Company, 56 FR 63943. December 6,1991. and 57 FR 10163, March 24.1992; Armstrong Air Conditioning, Inc.• 57 FR 899, January 9, 1992,57 FR 10160. March 24. 1992. 57 FR 10161. March 

### 24. 1992. and 57 FR 39193. August 28.1992; ThenD{) Products, Inc., 57 FR 903. January 9, 1992; and Consolidated Industries Corporation. 57 FR 22220. May 27. 1992. The DOE granting of the waivers permitted those manufacturers to test units withblowers having unvarying time delay designed into them. Torlay's document incorporates this test provision for all furnaces and boilers. See appendix N to subpart B ofpart 430, section B.1.



### Because the designed delay time varies among units. DOE is proposing a specified minimum blower delay time of20 seconds during the heat-up test if the designed unvarying delay time is 

### less than 

### 20 seconds. A cold draft would be created in the occupied zone 

### ifthe blower is started 

### too early. The Department's objective is to adopt a provision that allows all 

### furnaces designed to operate with unvarying time delay to be rated in a mannerthat provides for a reasonable level of occupantcomfort. Therefore. OOE is proposing a modification ofAmerican National Standards Institute! American 

### Society ofHeating. Refrigerating. and Air-Conditioning Engineers Standard 103-1988 {Section 9.6.1} to require a minimum blower delay of20 seconds during the flue or stack gas temperature measurement portion ofthe heat-up test for furnaces designed with unvarying time delay. This requirement also would apply to the newer 

### type ofdesign for fan control where the time delay is adjustable by dip switch orjumper terminals. If

### the maximum time deley that can be selected is 

### less than 20 seconds, the control would be bypassed and the blowerstarted 

### manually 20 seconds 

### after the burner ignition for the heat-up test.

6. Air Circulation Blower Delay at Burner Shut-off

During the cool-down test. the current furnace test procedure allows a 3- minute (l.5-minute for condensing furnaces) delay in

### blower shut-offor until the supply air temperature drops below 40°F above the inlet air 

### temperature. whichever results in 

### the longer blower on time. American National Standards Institute/American Society ofHeating, Refrigerating. and Air-Conditioning Engineers Standard 103-1988 provides an additional exception (section 9.5.1.2.2) that for a furnace without adjustable fan 

### control. the delay shall 

### be as designed. Therefore. to increase the Annual Fuel Utilization Efficiency value (which does
not include auxiliary electrical energy consumption in its calculation). some furnaces could be 

### designed with unvarying blower time delay longer than 3 minutes and less than 40°F temperature difference. resulting in a cold draft in the occupied zone. 3



### Again, OOE objective is to adopt a provision that allows all furnaces designed to operate with unvarying time delay to be rated in a manner that provides for a reasonable level of

3 [n addition. the electrical energyconsumed in running the'blower for a longer time may be monI than the beat energy recovecsd from the furnace heat exchangers. This will be true especially if the

source energy used to generate the electricity is considered rather than the electrical energy at the building Jim. 

### occupantcomfort. Therefore. OOE 

### is proposing

### a modification of .American 

### National Standards Institute

### IAmerican Society ofHasting. Rafrigerating, 

### and Air-Conditioning Engineers Standard 103-1988 (Section 9.5.1.2.2) to require furnaces with unvarying 

### time delay 

### that do not allow for theblowerdelaytime specified (3 

### minutes for noncondensing or 1.5 minutes for condensing furnaces or until the supply air temperature drops to 8 

### temperature of40°F above the 

### inletair 

### temperature. whichevergives the 

### longerbloweron 

### time) to be 

### tested with the 

### fan control bypassed and the blowermanually controlled to give the 

### delay time 

### specified during the cool-down test. 

### This requirement also would apply to the newertype offan 

### control 

### designs where the adjustment is 

### bydip switches

orjumperterminals and the range of adjustment 

### does not allow for the delay time specified. 

### See appendix N 

### to subpart B 

### of

### part430. section 8.4.

The Department also is proposing an exception tothe delay time requirement. specified above. for blower start-up and shut-offoffurnaces 

### that employa single
motor to drive the 

### powerburner and the blower. In that case, the powerburner and the blower would 

### be started and stopped at the same time. The current furnace test procedure includes this type ofexception for burner and blower start-up during the heat-up test.

7. BurnerBox Inlet Damper and Flue Damper

For non direct vent furnaces with powerburners. a value of0.4 for the theoretical off-cyc1e flue draft factor {Del 

### is assigned for use in the computation for off-cycle sensible and infiltration losses. For non direct 

### vent units with atmosphericburners. the existing test procedure and the American 

### National Standards Institute/American Society of Heating. Refrigerating. and Air

### ConditioningEngineers Standard 103- 1988 assign a 

## Dc value of 1.0 and no test measurement for 

### this factor is allowed. However. optional tracer gas procedure
to determine a possible lower Dr value is allowed for direct vent units and pOW8r burner units. SinceDr is a factor in the calculation for off-cycle losses. a smaller Of

### will decrease the calculated losses and thus increase the Annual Fuel Utilization Efficiency.

On August 1. 1989. LennoxIndustries (Lennox) filed a "Petition for Waiver" and an "Application for Interim Waiver" seeking DOE approval to use the existing optional tracergas method
to determine a 10w8r than assigned I)p 

### value for its G20 and G20R series of

## 44542 Federal Register I 

### Vol. 58, No. 161 I 

### Monday, August 23. 1993 I 

### Proposed Rules

atmospheric furnaces." The design of these units included an integral draft diverter and an electro-mechanical burner box inlet damper which closes offthe combustion air 

### inlet to the heat exchanger during the off-cycle. Lennox stated that restriction to the air flow through the heat exchanger by the closed damper during the off-cycle caused the draft factor!)p to be less than 1.0. resulting in reducad off-cycle losses. Lennox claimed that absent &n 

### alternative test method for !)P 

### the assigned value of 1.0 would result in a lower Annual Fuel Utilization Efficiency value and an unfair rating for its G20 and G20R series ofatmospheric furnaces.

The optional tracer gas method requested by Lennox specified that for

a unit with an integral draft diverter for draft relief, the cool-down test and the tracer gas test (which is 

### conducted during the cool-down test) be conducted with the diverter sealed and the stack restricted.

Several comments argued that ifthe tracergas method was used. the test should be conducted with the diverter open as this is the way the furnace would operate in field installations.s If 

### the divsrter was kept open during the
test. aspiration hy 

### draft reliefair 

### flowing through the diverter opening into the stack could increase the air flow through the heat exchangerthereby reducing the inlet damper effectiveness and increasing the value of!)p. A sealed diverter would prevent this aspiration motion from happening. resulting in a lower DF 

### value. Another view held that for some atmospheric furnacas. the !)p value was found to be 

### less than 1.0 when tested by the tracer gas method

even when there was no inlet damper. This would automatically result in an increase in furnace Annual Fuel Utilization Efficiency caused solely by utilizing testing to obtain !)p and not by installation ofan inlet damper.

The comments raised questions on the potential effect on industry product design and manufacturing. Therefore. DOE directed the National Institute of Standards and Technology to conduct efficiency tests ofa Lennox G20 furnace using tracer gas tests to determine !)p. The test results showed that the Lennox

• DOE published the Lennox petition in the Federal R.egister and solicited comments. date. and information respecting the petition and granted the requested Interim Waiver in its entirety. (54 FR 50525. December 7.1989).

• Comments on the petition were received from manufacturers. trade assoctetions. Stete government agencies. public interest groups. and utility companies. A complete list and a summary of the
comments received are included in the DOE Decision and Order ofDecember 5. 1990 (55 FR 50224. December 5.1990). 

### furnace had lower off-cycle losses and a**hi~er** 

### Annual Fuel Utilization Efficiency value when the inlet damper

was operating as designed than when the inlet damper was held open during the off-cycle. National Institute of Standards and Technology also found air-flow entering the heat exchanger through the diverter opening when testing was conducted with the diverter open during cool-down. This air-flow went down one section ofthe clamshell heat exchanger and came up another section ofthe clamshell heat exchanger into the stack. Therefore. an open diverter provided a second air passage (in addition to the one through the closed burnerbox inlet port) for the cold air to enter and cool down theheat exchanger.

Based on the test results and the comments received regarding methods to test the draft factor. DOE developed

a modified version ofthe existing tracer gas test method to obtain an off-cycle loss factor (KtJ that can be 

### used to calculate the off-cycle losses ofthe Lennox furnace. The modified method has two requirements: (1) That the tracar gas test be performed with the draft diverter open; and (2) that the test be 

### performed with the inlet damper open
as well as closed to obtain a ratio ofthe two off-cycle losses during the off-cycle (loss with inlet damper closed to loss with inlet damper open) for use as the off-cycle loss factor. The latter requirement ensures that only the relative improvement in the !)p value is allowed.

During testing. National Institute of Standards and Technology found the
tracer gas test. as specified in the current optional method. difficult to perform in the heat exchanger as was calculating an integrated off-cycle loss. National Institute ofStandards and Technology reported that a continuous measurement ofthe tracer gas concentration over the entire off-cycle period was difficult to perform accurately due to the rapidly changing nature ofthe gas flow at the beginning ofthe off-cycle. National Institute of Standards and Technology also found that measurements conducted in the heat exchanger and in the test stack gave similar results in the off-cycle loss value. In addition. the ratio ofthe losses calculated over the entire off-cycle period was close to the ratio calculated by using the integrated losses over a 1- minute interval beginning 5 minutes into the off-cycle where the rate of change ofthe gas flow was more stable. This is the same rationale used in the current optional procedure where measurement ofthe tracer gas at between 5 to 6 minutes into the offcycle is used to compute the !)p value. Therefore. the modified method requires: (1) That the tracer gas be injected and sempled in the stack instead ofin the heat exchanger; and (2) that the 1-minute (between minutes 5 and 6 into the off-cycle) integrated values ofthe two off-cycle losses (measured with the inlet damper closed and open during the off-cycle) be 

### used to calculate the off-cycle loss factor. The Department specified the modified tracergas procadure in its December 1990 Decision and Order granting Lennox a waiver for its G20 and G20R series furnaces. 8



### The Department is including the modified procedure in today's proposal for the measurement ofan off-cycle loss factor KL 

### for atmospheric furnaces requiring draft reliefand designed with

an electro-mechanical burner box inlet damper or an electro-mechanical flue damperinstalled upstream ofthe draft reliefdevice. See appendixN to subpart B ofpart 430. sections 7.5. 8.9. and 10.16.

A large portion ofthe off-cycle losses

occur in the first minute after the burner shuts off. and a slow closing damper will lose most ofits effectiveness. Therefore. DOE also is proposing that the method be applicable only when the damper closes completely within 10 seconds after the burner shuts off.

The Department also is proposing revisions to Table 6 in American National Standards Institutel American Society ofHeating. Refrigerating. and Air-Conditioning Engineers Standard 103-1988 for system numbersbecause ofthe inclusion ofthe tracer gas procedure for atmospheric furnaces with inlet or flue dampers in today's proposed test procedure. These revisions consist ofadding burner inlet damper or flue damper characteristics. DF 

### and Ds values. and are found in proposed table 1 ofappendix N to subpart B ofpart 430. section 7.3.
8. Power Vented Systems Employing Post Purge After Burner Shut-Off

The current test procedure and the American National Standards Institutel American Society ofHeating. Refrigerating. and Air-Conditioning Engineers Standard 103-1988 allow the optional tracer gas test method to be used to determine off-cycle power burner draft factor (Op) 

### for power vented burners. The procedure specifies that between 5 to 6 minutes into the cooldown period. a one-time measurement

• A detailed discussion of the NlST test results and the rationale for adopting a modified (tracer gas test proce<iure is included in the DOE December 1990 Decision and Order). (55 FR 50224. December 5.1990).

### Federal Register I 

### Vol. 58. 

### No. 161 

### I 

### Monday. August 23. 1993 

### I 

### Proposed Rules 44543

be made on the concentration ofthe
tracer gas in the flue gas and ofthe gas temperature. and the mEJasured data used to calculate the off-cycle flue gas flow rate and the power burner draft factor I)p.



### The assumption used to derive the calculation procedure is that the flue gas temperature decreases exponentially and smoothly by natural convective flow starting when the burner is, shut off. In order to vent combustion product residue in the heat exchanger ofsome furnaces orboilers. the combustion blower (forced or induced draft) continues to run for a short period of time after the burner is shut off. This action is referred to as post purge. For

a short post-purge period (less than 5 

### seconds). the additional loss caused by the forced convective flow ofthe flue gas is so small Ulat it 

### is considered negligible. When this post-purge period is long. as is the design ofsome units. the additional losses are large. However. such additional losses are not reflected in the current procedure. Actually. the longer the post-purge period. the smaller the calculated losses by the current tracer gas method. The off-cycle flue gas temperature TF.oFF measured between 5 

### to 6 minutes into the offcycle decreases faster with longer post purge because ofthe additional cooldown effe:ct ofthe forced air flow during post purge. The net effect is that units with long post-purge time receive an Annual Fuel Utilization Efficiency rating that is higher than it should be,

To correct this deficiency in the
current test procedure. OOE directed National Institute ofStandards and Technology to conduct tests on a power vented furnace employing post purge and to develop a correction procedure to the current tracer gas method. The test results 7 

### indicated that during the postpurge period. flue gas temperature decreased in an approximately linear fashion and thatthemass flow rate increased from its steady-state value because the decreasing temperature increased the flue gas density. The flue gas temperature resumes the exponential decreasing pattern after the post-purge period.

Based on the test results. OOE is proposing to modify the test procedure by separating the calculations into two parts. During the post-purge period. the flue gas temperature is assumed to decrease linearly. and the volume flow rate ofthe combustion blower is assumed constant and equal to the value when the bUrner is on. The density of the flue gas is assumed to follow the

7 National Institute of Standardsand Technology Interagency Report 4908, August 1992. 

### Ideal Gas Law in the calculation for the

mass flow rate ofthe flue gas. Based on these**a~sumptions.** 

### the off-cycle losses

can be determined analytically. In this
way. the losses during the post-purge period can be determined by taking the flue gas temperature data at the beginning and end ofthe post-purge period. The first temperature i$ the same

as the steady-state temperature. therefore. only one additional temperature is required. During the remaining period ofthe off-cycle (after post purge). the current tracer gas test and calculation procedures are used. The modification would require the
tracer gas concentration and temperature data to be taken between 5 

### to 6 

### minutes following the end ofthe post-purge period. The off-cycle time for this part ofthe calculation is equal to the regular average burner off-time (13.3 

### minutes for single stage furnace. 33.26 

### minutes for single stage boiler. 10 

### minutes for modulating furnaces and 15 

### minutes for modulatingboilers) minus the length ofthe post-purge period. The I)p 

### value determined by the tracer gas method is used to calculatethe off-cycle losses in percent ofenergy input during this period (after post purge). The losses from the two periods are totaled to arrive at the Annual Fuel Utilization Efficiency value. See appendix N to subpart B ofpart 430. 

### sections 10.B. 10.10.2. 

### and 10.11.2.



### Therefore. OOE is proposing to revise the current test procedure to require that the length ofthe post-purge period tp 

### and the flue gas temperature at end of the post-purge period to 

### be recorded. See appendix N to subpart B ofpart 430. 

### sections 8.2. 

### and 8.5.



### 9. Jacket Loss Test and Insulation Requirement for Downflow Furnaces

Neither the current OOE test procedure nor the American National Standards InstitutelAmerican Society of Heating. Refrigerating. and AirConditioning Engineers Standard 103- 1988 

### specify a jacket loss test for downflow furnaces. In its certification
program. the Gas Appliance Manufacturers Association requires that when conducting a jacket loss test on downflow furnaces. ifthe manufacturer has not supplied the internal section of
vent pipe connecting the flue collar to the top ofthe unit to be tested. the appropriate piece ofuninsulated vent pipe shall be installed by the testing facility. The Department accepts this approach and has included it in today's proposal. See appendix N to subpart B ofpart 430. 

### section 6.4. 10. 

### Blower Compartment Heat Loss During Jacket Loss Test

The current OOE test procedure and the American National Standards Institutel American Society ofHeating. Refrigerating. and Air-Conditioning Engineers Standard 103-1988 

### do not specify whether the furnace air circulation blower compartment 

### is considered part ofthe cabinet orpart of the duct system. In 1990. 

### SPC 103 

### recommended that theblower compartment be considered as part of the duct system and that no temperatures be recorded duringthe jacket loss test. OOE agrees with that specification and has included it in 

### today's proposal. See appendix N to subpart B ofpart 430. 

### section 7.2.

11. 

### Sealing ofVentilation Openings During Jacket Loss Test

Neither the.OOE test procedure nor the American National Standards Institute/American Society ofHeating. Refrigerating. and Air-Conditioning Engineers Standard 103-1988 

### specifies

a procedure for dealing with the heat loss ofair flowing from the louvered ventilation opening on the top. front. or sides ofthe unit cabinet during the jacket loss test. Therefore. the beat loss is unaccounted for during the test. The
measurement ofthis convective heat loss is difficult to perform with the
current flow measurement technique because ofthe low air-flow rate and temperature difference. OOE believes. however. that heat loss 

### by convective air flow through the ventilation openings may 

### be significant. This heat loss can be reduced to a minimum during thejacket loss test by taping or sealing with aluminum tape those ventilation openings from which the ventilation air exits from the cabinet. OOE is proposing that such taped areas be divided into the normal 36 

### square inch grids and that thermocouples be installed in each
square, over the tapes ifnecessary. to

measure the temperatures over the taped

area. A smoke test during a short steadystate test may be 

### used to determine the openings where the ventilation air exits from the cabinet. This would prevent the blocking ofthe louvered openings where combustion airenters. The taping also would apply to downflow furnaces. No taping oflouvers in thejacket would be required for other parts ofthe test procedure. and the tapes would 

### be removed after the completion ofthe jacket loss test. DOE is proposing the above sealing procedure in today's document. See appendix N to subpart B ofpart 430. 

### section 7.2.

### 44544 

### Federal Register I 

### Vol. 58, No. 161 I 

### Monday. August 23. 1993 I 

### Proposed Rules

12. Insulation Requirement for Units With Draft Diverter

Both the current OOE test procedure and the American National Standards Institute! American Society ofHeating. Refrigerating, and Air-Conditioning Engineers Standard 103-1988 require the insulatiQn ofan integral draft diverter with a minimum ofR-7 insulation material for the cool-down and heat-up tests. In 1991. ETL Testing Laboratories. Inc. suggested that when testing units with integral draft diverters. which are mounted in an exposed position (not inside the overall cabinet), the diverters should be considered part ofthe vent pipe and be 

### insulated to reduce heat loss (as is the
test stack) before starting any test including thejacket loss test and the steady-state test. ETL Testing Laboratories. Inc. uses this process when testing furnaces for the Gas Appliance Manufacturers Association efficiency rating certification program. OOE 

### agrees with ETL Testing Laboratories, Inc.·s recommendation and is proposing such a provision in today's document. See appendix N to subpart B ofpart 430. sections 6.2. 6.5, and 6.6.

13. Insulation Requirement for Flue collector Box

Both the OOE test procedure and American National Standards Institutel American Society ofHeating. Refrigerating. and Air-Conditioning Engineers Standard 103-1988 require that the draft diverter and the flue gas collection box for unitswith integral draft diverterbe insulated with no less than R-7 insulation material before the
start ofthe cool-down test. This is to reduce heat loss and to obtain a more accurate flue gas temperature at the test plane. where the flue gas temperature is measured during cool-down and heatup test.

This requirement is not specified for the flue collector box in units with
powerburners. The Department. however. believes that the same insulation requirement on the flue collector box should apply since the test plane for temperature measurement for
power burner units is the same as for units with draft diverter. Therefore. OOE is proposing the same insulation requirement (during cool-down and heat-up tests but not duringjacket loss and steady-state tests) on flue collector box for power burner units. See appendix N to subpart B ofpart 430. section 6.3. 14. Piping Arrangement for Hot Water Boilers

Based on data provided by the Hydronic Institute to Standard Project Committee 103. an error was identified in the schematic figure for piping arrangement for hot water boilers in the American National Standards Institute! American Society ofHeating. Refrigerating. and Air-Conditioning Engineers Standard 103-1988 (Figure 6) and in the OOE test procedure. The

error was in the recirculation line which

was shown as connected to the return side ofconstant head tank instead of connection to the supply side ofthe tank. DOE concurs with the Hydronic Institute and is including the revised schematic for hot waterboilers in today's proposed amendments. See appendix N to subpart B ofpart 430. section 6.7.

15. Minimum Value for I)p 

### and l)p



### The current test procedure allows the minimum value for Dp and l)p

### to equal 0.0 on units where no air flows through the combustion chamber and heat exchanger when the burner is off. American National Standards Institute! American Society ofHeating. Refrigerating. and Air-Conditioning Engineers Standard 103-1988 sets the minimum value at 0.00001. Current
measurement techniques preclude an accurate tracer gas test on units with a low off-cycle air flow rate. Therefore. 

### it is very difficult to verify an "absolutely

no air-flow" condition (this has been confirmed by National Institute of Standards and Technology). Accordingly. OOE proposes that a value of0.05 for Dp be 

### assigned for any units whose I)p 

### value. when measured by the optional tracer gas method. is less than 0.10. See appendix N to subpart B of part 430. sections 7.4.3, 8.8.3. 8.10. and 10.15.

16. Maintaining Draft During Off-Cycle

American National Standards Institute!American Society ofHeating. Refrigerating. and Air-Conditioning Engineers Standard 103-1988 requires that a draft 

### be maintained in the flue pipe for furnaces and boilers with oilfueled or power gas burners. The Department proposes to clarify this requirement by specifying that it applies only to oil-fueled or power gas burners that employ barometric dampers for draft control. See appendix N to subpart B ofpart 430. sections 6.8. 8.3. and 8.6.

17. Test Requirements for Modulating Units

The OOE current test procedure requires that testing and calculation procedures for cyclic tests (cool-down and heat-up) be conducted at both the maximum and the reduced input rates for units with two-stage modulating controls and at the reduced input rate for units with step modulating controls. American National Standards Institute! American Society ofHeating. Refrigerating. and Air-Conditioning Engineers Standard 103-1988 specifies the same calculation procedures but is unclear (in sections 11.4 and 11.5)&s to the type oftests to be performed and the
test results to be used in the calculations that follow. The SPC 103 has recommended limiting values for the
terms Te. Effys•.M 

### and 

## 0wt.M and the conditions under which these limits apply. OOE today is proposing such recommendations to the applicable sections. See appendix N to subpart B ofpart 430. sections 10.13. and 10.14.

The Department also is proposing to clarify the requirement for determining the draft factors I)p

### and l)p 

### for units with modulating control. To be consistent with other cyclic test requirements. OOE proposes that the optional tracer gas procedurebe conducted at both the maximum and the reduced input rates for units with two-stage controls and at the reduced input rate for units with step modulating controls. See appendix N to subpart B ofpart 430. section 8.8.4.

18. On-cycle Time Constant and 

### OffcycleTime Constant

In the current caleulation procedure. both the on-cycle and off-cycle time
constants use equations involving the logarithm ofmeasured temperature difference at two specified time intervals. In testing some units. it 

### is possible that the two temperatures will be 

### close enough to cause a negative argument in the logarithm function and subsequent computation failure. To prevent this occurrence. the SPC 103 recommended a correction procedure specifying that when the temperatures difference is negative. the difference between the two temperatures be set to equal 0.1. OOE agrees with the correction procedure and is proposing it in today's document. See appendix N to subpart B of part 

### 430. sections 10.3. and 10.4.

19. Multiplication Factor for Jacket Loss for Finned Tube Boilers for Isolated Combustion System

The Standard Project Committee 103 recommended the addition ofthe value CJ

### =0.5 as the multiplication factor jacket loss for finned tube boilers for Isolated Combustion System applications. This is consistent with the values ofCJ assigned for other systems when installed as outdoor systems and as Isolated Combustion !lystem. OOE

### Federal Register 

### I Vol. 58, No. 161 

### I Monday, August 23. 1993 

### I Proposed ,Rules 

### 44545

accepts the recommendation and is including it 

### in today's proposal. See 

### appendix N to subpart B ofpart 430, section 10.12.1.2.
20. Water Pump Energy Consumption

Forhot waterboilers. American National Standards Institutel American Society ofHeating, Refrigerating, and Air-Conditioning Engineers Standard 103-1988 assigns a constant value for water pump power (BE=O.13 KW) and

no test measurement is required or allowed. This value is based on the average power consumption ofwater pumps shipped with boilers in 1978. To increase the accuracy ofthe energy deScriptors, annual efficiency descriptors, and energy factor, which include electrical energy consumption and to capture the variability in pump efficiencies available for use with boilers. OOE today is proposing a test method which requires measuring the power consuinption ofthe water pump used with the hot waterboiler. This power consumption is used in the calculation ofthe energy descriptors. annual efficiency descriptors, and energy factor. See 

### appendix N to subpart B ofpart 430. section 8.1.1.
21. Energy Factor

The current OOE test procedure includes a procedure for computing the annual auxiliary electrical energy consumption offossil-fuel furnaces and boilers and an**e~nergy** 

### factor which includesboth the fossil fuel and the auxiliary electrical energy consumption ofthe appliances. Specifically, "energy factor" is defined in the OOE test procedure as the ratio ofthe annual output ofenergy delivered to the heated spaceby fossil fuel to the total annual energy input to the appliance including auxiliary electrical energy.

Appendix B ofAmerican National Standards InstitutelAmerican Society of Heating. Refrigerating, and AirConditioning Engineers Standard 103- 1988 defines "energy factor" in equation (1). 

### Equation (1) is defined for an energy factor term which gives credit for the electrical energy that is recovered as usable heat such as from a blower motor in the circulating air stream. In addition.

a factor F. representing the ratio ofthe heat energy required to generate the electricity consumed to the useful heat energy delivered at the appliance by the electricity is applied to the auxiliary electrical consumption to reflect the efficiency ofall energy used to run the appliance. OOE considers equation (1) in American National Standards Institute!American Society ofHeating. Refrigerating. and Air-Conditioning Engineers Standard 103-1988 to be appropriate for describing the energy factor ofthe appliance when both fossil fuel and auxiliary electrical energy consumption are considered together. Therefore. OOE proposes to adopt equation (1) in Appendix B ofAmerican National Standards Institute!American Society ofHeating. Refrigerating. and Air-Conditioning Engineers Standard 103-1988 and the accompanying procedure in Appendix C for isolated combustion systems as the energy factor. Three slight modifications are included in the procedure presented here. Those are: American National Standards Institute! American So8iety of Heating. Refrigerating. and AirConditioning Engineers Standard 103- 1988 equation (1) is corrected-divide Annual Fuel Utilization Efficiency term by 100 and multiply the 

### right side ofthe equation by 100. the extra energy consumed by the combustion blower during post-purge is included in the calculation. and the energy consumed by the electrical intermittentor interrupted ignition device. if employed. is also included in the calculation ofthe energy factor. See appendix N to subpart B ofpart 430. Sections 10.19 and 10.21.

22. Annual Efficiency Descriptor

Since Annual Fuel Utilization Efficiency is defined in the Act in terms ofan isolated combustion system. OOE believes that an additional energy descriptor. comparable to Energy Factor. is needed for those furnaces and boilers which are primarily installed indoors. For example. practicaUyall mobile home furnaces are installed indoors and there are steps that could be taken to obtain a higher Annual Fuel Utilization Efficiency orEnergy Factor. such as addingjacket insulation. which would have no impact on the actual efficiency ofa furnace installed indoors. Because ofthe above, theDepartment proposes
an additional new energy descriptor. annual efficiency deScriptor. for those classes offurnaces which are installed indoors. See appendix N to subpart B of part 430. sections 10.20 to 10.26.

OOE proposes to adoptequation (1) 

### in Appendix B ofAmerican National Standards Institutel American Society of Heating. Refrigerating. and AirConditioning Engineers Standard 103- 1988 and the accompanying procedure in Appendix C for indoor installations

as the Annual Efficiency. Again three slight modifications are included in the procedure presented here. Those are: American National Standards Institute! American Society ofHeating. Refrigerating. and Air-Conditioning Engineers Standard 103-1988 equation (1) is corrected-divide Annual Fuel Utilization Efficiency term by 100and multiply the right side ofthe equation by 100, the extra energy consumedby the combustion blower during post-

. purge is included in the calculation, and the energy consumedby the electrical intermittent orinterrupted ignition device. if

### employed, is also included in the calculation ofAnnual Efficiency.

The calculation ofannual effiCiency descriptor involves the determination of the heating seasonal efficiency and the Annual Fuel Utilization EffiCiency based on an outdoor installation for all weatherized furnaces orboilers and based on an indoor installation for all non-weatherized furnaces orboilers. This 

### is different from the existing requirement for non-weatherized furnaces where heating seasonal effiCiency and Annual Fuel Utilization Efficiency are calculated on the basis of installation as an Isolated Combustion System. In today's proposal. the Annual Fuel Utilization Efficiency for nonweatherized furnaces is still based on an Isolated Combustion System system. Since the indoorvalues ofthe heating seasonal effiCiency and Annual Fuel Utilization Efficiency need to be calculated and used to determine the AE. two sets ofvalues for heating seasonal efficiency and the Annual Fuel Utilization Efficiency {one for the rating ofthe system based on Annual Fuel Utilization Efficiency (Isolated Combustion System) and the other for the annual efficiency descriptor (indoor system) need to be calculated. OOE believes that, with the calculation procedure computerized,8 the effort involved in computingthe two sets of values is insignificant since the same test data are used in the calculation and

no additional test is required. Specifically, the only changes between the two computerruns are the indices (codes) which specify the installation location and the system number.

The major difference between the Annual Fuel Utilization Efficiency and the Annual Efficiency will be the 

### inclusion ofthe auxiliary electrical energy in the calculation for the annual efficiency term and the application of the F factor (the ratio ofthe energy consumed at the source ofelectrical generation to the electrical energy delivered at the furnace orboiler) to the electrical energy term in the denominator. Because ofthis. the value ofthe Annual Efficiency will be noticeably smaller than the corresponding Annual Fuel Utilization

• National Institute of Standards and Technology Annual Fuel Utilization Efficiency-BF version 4.0 computer program.

### 44546 Federal Register / Vol. 58, No. 161 

### I Monday, August 23, 1993 / Proposed Rules

Efficiency value, which includes only fossil fuel energy in its 

### calculation.
23. Other Minor Modifications to American National Standards Institute/ American Society ofHeating. Refrigerating, and Air-Conditioning Engineers Standard 103-1988

DOE also is proposing to adopt corrections and clarifications ofseveral typographical errors and inconsistencies identifiedby Standard Project Committee 103 following publication of American National Standards Institutel American Society ofHeating, Refrigerating, and Air-Conditioning Engineers Standard 103-1988. The following are the listing ofthese modifications, referring to section numbers ofAmerican National Standards mstitute/ American Society of Heating, Refrigerating. and AirConditioningEngineers Standard 103- 1988: 1. Section 8.8.2.2.-Delete the two

words "flue or" in the first line. 2. Section 9.7.3.-Delete the phrase "if

draft 

### is not maintained during the cool-down" in the second sentence. 3. Section 10.-Revisethe definitions

for the variables Me and 

### Qc to: Me=Mass ofcondensate, Ib Qc=fuel energy input during entire (3

or 6 cycles) cyclic condensate collection test, Btu 4. Section 11.2.4.-Delete the three

words "oil orpower" in the first sentence ofthe second paragraph. Also, replace the third paragraph with "For direct 

### exhaust gas or oil furnaces and boilers, S/F=l." 

### 5. Section 11.2.6.-Add missing right

closing bracket in Table 7 for 

## L..ss. 6. Section 11.2.9.9.-Correctthe

definitions for**~for** 

### different systems to be consistent with the tabulated values ofSystem No. versus**~** 

### in Table 6. Also, correct the constant term 0.75 in the definition for Ds to 0.79 for systems 4 and 8. 7. Section 11.2.9.14.-Correctthe



### section numbers which were referenced in the definitions for '!IF.O.X (corrected from 11.2.9.5. to 11.2.9.7.) and '!IF.O.X (corrected from 11.2.9.7. to 11.2.9.5.). 8. Sectior. 11.2.9.16.-Change the

system numbers from 9-12 to 9-10. 9. Section 11.2.10.6.-Correctthe

referenced section number in the definition for the variable F6 from 11.2.9.18. to 11.2.9.19. 10. Sections 11.4.8.5., 11.4.8.8.• and

11.4.8. 10.-Setthe minimum default values for the terms Tc (if

### Tc<O, set Tc:='O). Effyss.M (if

### QOUT.R>DHR. set Effyss.M=EffyssR), and QoUT.M (IF Qom.R>DHR. QoUT,M=QOUT.R) as recommended by American Society of Heating. Refrigerating, and Airconditioning Engineers Standard Project Committee 103. 11. Section 11.7.2.-Delete equation

Ds=(Oo}(Op} for system number 8 and substitute Ds=[(0.79+Op)/1.4] (00). 12. AppendiX E ofAmerican National

Standards mstitute/ American Society ofHeating. Refrigerating. and AirConditioning Engineers Standard 103-1988-Correctthe typographical

errors in the defining equations for the variables F5, F6. and F8 where a constant term 

### "+ 28" was missing from a term in the denominator ofthe equations as they appeared in Appendix E. 

### See Section 10.27 and Table 2 ofthe proposed test procedure for details ofthe corrected terms of the equations.

. B. Vented lfome Heating Equipment Test Procedure

The Department published the test procedure for vented home heating equipment on May 2,1:978.43 FR 20182. DOE amended this test procedure on March 

### 28, 1984. 49 FR 12169, to include a simplified procedure for heaters with modulating controls.**man~lally** 

### controlled vented heaters. vented heaters equipped with thermal stack dampers. and floor furnaces. 43 FR 20182.

DOE today proposes to amend the vented heating equipment test procedure: (1) To establish an annual effiCiency descriptor to account for the auxiliary electrical energy consumed by the fan or blower in addition to the fossil fuel consumed; (2) to revise the calculation procedure for Annual Fuel Utilization Efficiency; and (3) to revise the calculation procedure for weighted average steady-state effiCiency for manually controlled heaters with various input rates.
1. Annual Efficiency Descriptor

DOE determined that an additional

new energy descriptor is needed to adequately address the energy used by

some ofthe design options considered for energy standard level evaluation because the current energy descriptor. Annual Fuel Utilization Efficiency. does not include electrical consumption. For example. design options, such as adding

an induced draft fan. improve thermal efficiency but. at the same time. add electrical consumption which unless accounted for in the energy descriptor could lead to higher Annual Fuel Utilization Efficiency with little or no net energy savings. Therefore. the Department is proposing a new energy descriptor. Annual Efficiency (AE). See 

### appendix 0 

### to subpart B ofpart 430. section 4.6. The Department's current test procedure for vanted home heating equipment prescribes the calculation of the Ar,nual Fuel Utilization Efficiency based on the energy consumption of fossil fuel only. Since auxiliary electrical energy is consumed by the appliances for the operation ofthe fan

orblower. DOE believes a more appropriate term for evaluating the efficiency ofthe appliances would include both the fossil fuel and the auxiliary electrical energy consumption ofthe appliances.

American National Standards Institutel American Society o{Heating, Refrigerating. and Air-Conditioning Engineers Standard 103-1988. appendix B and appendix C, includes calculations for energy factor which uses both the fossil fuel and the auxiliary electrical energy consumed by the appliance. It 

### also gives credit for the electrical energy that is recovered as usable heat as is the

case ofa blower motor that is in the circulating air stream. In addition, a factor F. representing the ratio ofthe heat energy required to generate the electricity consumed to the useful heat energy delivered at the appliance by the electricity, is applied to the auxiliary electrical consumption to reflect the true amount ofenergy used to run the blower or pump. The resulting formula is designated as equation (1) 

### in Appendix B ofAmerican National Standards InstitutelAmerican SOCiety of Heating. Refrigerating, and AirConditioning Engineers Standard 103- 1988 which DOE considers the appropriate term to describe the Annual Efficiency ofthe appliance when both fossil fuel and auxiliary electrical energy consumption are considered together.

Therefore, DOE proposes to adopt equation (1) 

### in Appendix B ofAmerican National Standards mstitutel American Society ofHeating. Refrigerating, and Air-Conditioning Engineers Standard 103-1988 and the accompanying procedure in Appendix C ofAmerican National Standards Institutel American Society ofHeating. Refrigerating. and Air-Conditioning Engineers Standard 103-1988 as the basis ofa new rating term called Annual Efficiency for vented home heating equipment. The Department's proposal includes some modifications to the calculation procedure contained in Appendix B and Appendix C ofAmerican National Standards Institute/American Society of Heating. Refrigerating. and AirConditioning Engineers Standard 103- 1988. The DOE test procedure for vented home heating equipment does not require the recording ofthe blower on-time and off-time; therefore, the

### FedeT81 Resister 

### I Vol. 58. No. 161 

### I Monday, 

### August 23. 1993 

### I 

### Proposed Rules 

### 44547

. operating time ofthe blower and the



### burner are assumed tobe the 

### same as the 

### burner. This

### results in a simpler procedure

### than the one 

### developed for the furnace test procedure discussed previously. The complete calculation procedure for the 

### AnnualEfficiency of vented home beating equipment

### is included in this document and may be found i.n appendix 0 

### to subpart B 

### of part

# "30.

. 2. Pilot Light 

### Energy Consumption



### On September 21, 1990.

### Appalachian Stove and Fabricators. Inc. (Appalachian) and ValorIncorporated (V



### alar) each filed a "Petition for Waiver" requesting 

### that DOE grant a waiver 

### from the I)()E 

### vanted home heatingequipment

### test procedure regarding (a) pilot light energy consumption and (b) 

### average 

### weighted steady-stateefficiency 

### for their manually controlled vented home heaters.

With 

### regard 

### to thepilot light

### energy consumption. 

### the current DOE test prooedure requi.re8 the measurement of energy input to the pilot light (Qp) 

### and the use ofthis data in the calculation of Annual Fuel Utilization Efficiency for the energy consumed by the pilot light when the heater

### UJ not 

### in operation. Each petition cites a vented heater (Appalachian's AGS-44 model and Valor's model VN-32, 

### respectively) fitted 

### with a pieza ignitm'which fires a transient pilot for 

### smooth and 

### safe ignition ofthe main 

## buroar. The user manually operata. the pilot light. 

### the igniter, 

### and the 

### main burner. 

### The pilot light. which remains 

### on during the operation of

### the heater at all (three) 

### settings ofoperation. 

### is automatically turned offwhen 

### the heater'. control knobis set to 

### the "OFF" position. Operation ofthese 

### units. eo:ording to the manufacturers' instructions. results in lower energy consumption and higher AnnualFuel,Utilization Efficiency than calculatedby the current DOE test procedure. Since the current DOE test procedure does not address this issue. the manufacturers each requested that the tel"II! involving 

### the pilot energy consumption (Qpl 

### be deleted in the calculation ofAnnual Fuel Utilization Efficiency. resulting in

an Annual FuelUtilization Efficiency which is equal to the heating seasonal efficiency ofthe heater.

DOE granted the petitions. excluding the pilot light energy input term in the calculation ofAnnual Fuel Utilization Efficiency. 

### subject to the heater having

an easy-ta-read label near the control knob instructing the user to tum 

### the valve to the OFF position when the heater 

### is not in use. 1I



### Having made the above determination. OOEtoday is**pro~** 

### to amend the test procedureaccordingly for vented 

### home heatingequipment. 

### See appendix 0 to subpartB

## 01part430. section 3.5.



### 3. Weighted Average Steady-State Efficiency

Appalachian and Valor 

### also requested waivers from the current DOE 

### test procedure for manually controlled vented heaters with various input rates where the weighted average steedy-state efficiency is 

### detennined at 50 

### percent ±5 

### percent ofthe maximum fuel input
rate. 10 

### The manufacturers each stated that the manual controls on their respective heaters give 

### three fix8d gas rates with 

### the minimum rataat 65.3 percent ofthe maximum rate. 

### This precluded testing 

### unitsat the 50 percent 

## is percent rate as specified in the OOE
test procedure. 

### The manufactW'8J1l 

### each requested approval for an alternate test procedure to determine 

### the ateady-stata efficiency based on a weighted 8vwage ofefficiencies obtained at the 

### three fixed input settings.

The Department denied use ofan alternate test procedure 

### based on a weighted average ofthree differant firing rates.t1 Instead,DOE required that the steady-state efficiency ofthe heaters be measured 

### at their minimum fuel input rate of65.3 percent ofthsir maximum inputrate. Thiaminimum fuel input rate is closest to the 50 percent

## is percent at which other manually controlled WIlted 

### beaten are being rated. DOE believed that any other method would result in an unjustified higher Annual 

### Fuel UtilUation Efficiency 

### that wouldbe unfair to 

### other manufacturen of

### similar heaters because relatively higher firing rates would generally result in higher

### burner efficiencies.

Accordingly. DOE isproeosing today that calculation ofthe weighted average steady-state efficioocy for manually controlled vented heaters use a minimum fuel input rste no higher than two-thirds ofthe maximum fuel input
rate ofthe heater. See appendix 

### 0 to subpart B ofpart 430. section 4.2.4.

C. 

### Unifonn Test Method 

### for Measuring 

### the Energy

### Consumption 

## of Pool Heaters
The Department published thepool heater tast procedure on February 7. 1989.54 

### FR 6076. referencing American

056 FR 51711 and 56 FR 51714. October 15. 11191.

10Appendix 0 to .ubpart B ofpart 430.

It511 FR 51711 and 511 FR 51114. October 15. 1991. 

### National StandardsInstitute 

### Standard Z21.56-1986 

### for gas-fired 

### pool heaters. 

### DOE today proposee to 

### am8ncl 

### the pool hester test 

### procedureto Includean annual efficiencydescriptor

### which
accounts for 

### the auxiliary electrical
energy OODsumed by

### thefan 

### orpump 

### in addition to 

### ·lte fossil fuel 

### consumed 

### and
torefenmoe 

### the latest wrsioo of American National Standanllnatitute Standard, Z21.56-1990, 

### remg,dzh18

### that the 

### 88Ctions referenced by

### theDOH pool heater

### testprocedurehave DOl

# chaft8ed.

1. 

### AnnualEfficiency Dascriptor



### DOH detenntned that an 

### additional

new energy descriptor 

### I.

### needed to adequately eddress the 

### energyuaed by

some

### ofthe 

### design options oomddered fur standard level .waluationbecause the currenteDergydescriptorthennal efficiency does not include pilot Ught 

### usage orelectrical consumption. For example. to considerelectronic Ignition. the sevings In pilot light

### pa consumption would have tobe accounted for 

### in 

### thedescriptor. Furthermore. design options. such as fan assisted combustion, Improve thermal efficiencybut. at 

### the same time. add electrical usage which. unless accounted for 

### in the energydescriptor. could 

### lead to higherthermalefficiency with little or no net energy savings. Therefure. the Department is proposing



### a new energy descriptor, Annual Efficiency. See appendixP to 

### subpartB ofpart 430. section 4.1.

The cummttest 

### procedureforpool heaters prescribes a oaIculation of

### the thermal efficiency which Isbased on the
energy consumption 

### offossil fuel only. Since auxiliary electrical energy

### is consumedbythe heaters 

### for the operation of

### the 

### fan orpump, OOE believes a more appropriate term 

### for evaluating

### the efficiency

### oftheheaters would 

### be one which includes

### both

### the fossil fuel and the auxiUary

### electrical energy consumption oftheheaters. Specifically. this Annual Efficiency is defined as the ratio ofthe annual output ofenergy delivered to the heated pool
waterby fossil fuel to thetotal annual
energy input to the heater Including auxiliary electrical energy.

The annual output ofenergy deUvered
to the pool water would

### be the thermal efficiency ofthe heater multipHed by the average annual 

### fossil fuel energy used by the poolheaterminus the
energy used by 

### the continuouspilot light (ifused) during the average nonpool season hours. The total annual
energy input to the heater. including auxiliary electrical energy, would

### be the
average annual fossil fuel 

### energy to

### the pool heater plusthe average annual

## 44548 Federal Register I 

### Vol. 58, No. 161 I 

### Monday, August 23, 1993 I 

### Proposed Rules

auxiliary electrical energy consumption for the pool heater.

The latter term (auxiliary electrical energy) is multiplied by a factor F which represents the ratio ofthe heat energy required to generate the electricity consumed to the useful heat energy delivered at the pool heater by the electricity to reflect the true amount ofenergy used to 

### run the auxiliary electrical equipment. The average
season of

### use ofthe pool in hours per year and the average burner**op~rating** 

### hours during the pool season wIll be obtained from survey data on the Nation's 

### use ofheated pools. At the present time, season ofuse is assumed to be 4,464 hours peryear, and the burner on-time per.year is assumed to be 104 hours. These values are 

### based on limited survey data available as of February 15, 1991.12 DOE, today, proposes to adopt this annual efficiency descriptorusing the F=3.37, the survey data on pool season, and burner operating hours.



# m. Environmental Review



### Pursuant to section 7(c)(2) ofthe Federal Energy Administration Act of 1974 (Public Law 93-275), a copy ofthis document 

### has been submitted to the Administrator ofthe Environmental Protection Agency for his comments concerning the impact ofthis proposal

on the quality ofthe environment.

Since test procedures are used to standardiza the measurement ofenergy usage and will not affect the quality or distribution ofenergy usage, prescribing test procedures will not result in any environmental impacts. DOE, therefore, has determined that prescribing test procedures underthe Program is not a major Federal action significantly affecting the-quality ofthe human environment within the meaning ofthe National Environmental Policy Act of 1969. This Rulemaking, which amends existing pltrt 430 oftitle 10, will not change the**environ~ntal eff~** **~f** 

### such regulation, and is an Item which IS "categorically excluded" (A5) by the Department ofEnergy**regul~tions** 

### on National Environmental Pohcy Act Implementing Procedures (10 CFR 

### part 1021) (57 

### FR 15122. 15152. April 24. 1992) (Appendix A to subpart D ofpart 1021, Categorical Exclusion**~5.).** 

### Consequently. neither an Envlfonmental Impact Statement nor an Environmental Assessment is required for the proposed rule.

12Berkeley Solar Group and Xenergy:**1~90.** OP. Cit. P 8-9 and California Energy Commission. Electricity Report 18. California Energy Commission. Forecastins Division. Sacramento. California. as cited in the BGS/Xenel"8Y Report. 

### IV. Regulatory**Revie~** 

### Pursuant to the January 22. 1993, memorandum on the subject of regulatory review from the Director of the Office ofManagement and Budget (58 

### FR 6074, January 25. 1993),**~E** 

### submitted this document to the Duector for appropriate review. The Director has completed his review. Separately, DOE has determined that there is no need for

a regulatory impact analysis because the rule is not a major rule as that term is defined in section 1(b) ofExecutive Order 12291.

V. 

### Regulatory Flexibility Act

The Regulatory Flexibility Act (public Law 96-345) (5 U.S.C. 601-612) requires that an agency prepare an initial regulatory flexibility analysis and that itbe published at the time the proposed rule is published.**~is** 

### requirement (WhIch appears In 

### 5 U.S.C. 603) does not apply if

### the agency "certifies that the rule will not, if 

### promulgated, have a**significan~** 

### economic impact on a substantial number ofsmall entities." The proposed rule affects manufacturers offumacas andlboilers. vented home heating equipment. and pool heaters. As 

### previously discussed. the test procedures would not have significant economic impact, but rather. would provide common testing methods. Therefore, DOE certifies that the proposed rule, if

### promulgated.**~~uld** 

### not have a "significant economIC Impact

on a substantial number ofsmall entities."

VI. 

### Federalism Review

Executive Order 12612 (52 

### FR 41685. October 30.1987) requires that regulations orrules be reviewed for any substantial direct effects on States. on the relationship between the Federal Government and the States. or on the distribution ofpower and responsibilities among various levels of Government. If

### there are sufficient

. substantial direct effects. then Executive Order 12612 requires preparation .ofa federalism assessment to be used In 

### all decisions involved in promulgating and implementing a regulation or a rule.

DOE has identified a substantial direct effect that today's proposed rule would have on State governments. It 

### would initially preempt inconsistent State regulations. However. DOE has concluded that such effect is not sufficient to warrant preparation ofa. federalism assessment for the followmg

reason: the Act provided for subsequent State petitions for exemption. Thus. a determination as to whether a State law prevails must be made on a case-by-case basis using criteria set forth in the Act. When DOE receives such a petition, it will then be appropriate to consider preparing a**f~eralis~ as~sment**  

### consistent WIth the cntena In 

### the Act.

VB. 

### Review Under Section 32 

### ofthe Federal Energy Administration Authorization Act



### The test procedures proposed today incorporate the commercial standards to

measure the efficiency and capacity of furnaces andlboilers. vented home heating equipment, and pool heaters: The commercial standards are Amencan National Standards Institutel American Society ofHeating. Refrigerating. and Air-Conditioning Engineers Standard 103-1988 and American National Standards Institute Standard Z21.56- 1990.

Pursuant to section 301 ofthe Department ofEnergy Organization Act (Public Law 95-91). 

### DOE is required to comply with section 32 ofthe Federal Energy Authorization Act, as amended by section 9 ofthe Federal Energy Administration Authorization Act of 1977 (Public Law 95-70).

The findings required ofDOE by section 32 ofthe Act serve to alert the public and DOE regarding the use 

### and background ofcommercial standards in

a proposal and through the rulemaking process. They allow interested persons to make known their views regarding the appropriateness ofthe use ofany particular commercial standard in a proposed rulemaking.

DOE has evaluated American National Standards Institutel American Society of Heating. Refrigerating, and AirConditioning Engineers Standard 103- 1988 and American National Standards Institute Standard Z21.56-1990 with regard to compliance with section 32{b) ofthe Act. The Department isunable to conclude whether these standards fully complied with the requirements of section 32(b) ofthe Act. i.e., that they

are developed in a manner which fully provided for public participation, comment, and review.

As required by section 32(c) ofthe Act. DOE will consult with the Attorney General and the Chairman ofthe Federal. Trade Commission concerning the impact ofthese .standards**o~** 

### .. competition. pnor to prescnbmg final test procedures.


# vm. Public Comment

A. 

### Written Comment Procedures



### Interested persons are invited to participate in the rulemaking by submitting data. comments, or information with respect to the proposed test procedures selforth in

### Federal**~r** 

### I Vol. 58, No. 161 

### I Monday. 

### August 23, 1993 

### I Proposed Rules

this document to

### the address indicated
at the 

### beginningof

### tbe documenL

Comments should

### be identified both



### on the envelope and on the documents

as "Furnaces, Vented HomeHeating Equipment and Pool Heaters Test Procedures," (Docket No. 

## EE-RM-93- 501). 

### Ten**(1~)** 

### copies

### are Nqussted to be 

### submitted. Additiooally, the Department 

### would appreciate an electroniccopyofthe COlIlIMJlts to the
extentpossible. The Department 

### is 

### currently using WordPedect'Dof 5.1. All 

### submittala received 

### by the date specified 

### at 

### thebeginning ofthis document will 

### be considered by 

### OOE before 

### final action is taken on the 

### proposed amendments.

Pursuant 

### to theprovisionsof 10CFR 1004.11.

### any person submitting information which 

### be 

### or she believes to be confidential and exemptby 

### lawfrom public

### d.i3closure 

### should submit one 

### romplet8 copy ofthe 

### document and 

### eightcopies. 

### ifpossible. from 

### which the infonnation believed to

### beconfidential has been 

### deleted. DOE 

### will make

### its

own determination with ragard 

### to the confidential status ofthe information and treat it 

### according to its determination.

Factors ofinterest to DOE when evaluating NqUests

### to treat 

### as confidential information that hasbeen submitted include: (1) 

### A description of the items; (2) 

### an indication asto whether and why such items 

### are customarily treated as confidential within theindustry; (3) 

### whetherthe information is generally known by. 01' 

### available from, other sources; (4) 

### whetherthe informationhaspl'8viously boon made available to 

### others without obligation concerning 

### its confidentiality; (5) 

### enexplanation ofthe 

### competitive injury to 

### the 

### submitting person which would result from public disclosure; (6) 

### an indication as to when suchinformation

## Dlfxbt lose its confidential charscter due tothe 

### passage oftime; and (1) 

### why disclosure ofthe information would be 

### contrary to the public interest.

B. Public Hearing

1. 

### Procedures for Submitting Requasts to 

### Speak

The time and place ofthe 

### public hearing are indicated 

### at thebeginning of this docwnenL DOE invites any person who 

### has an interest in today's proposed rule. orwho is a repl'8Sentative ofa group or class ofpersons thathas an interest in the proposed test procedures.
to make a request for an opportunity to make an oral presentation. Such requests should be directed to the address indicated atthe beginning of this**dOCUID~t.** 

### Requests 

### may be hand deliV8l'8d to 

### such address 

### between the 

### hours of8 

### a.m. and 4 

### p.m., 

### Mond.y through Friday. exceptFederalholidays. Requests should be 

### labeled "Furnaces. VentedHome**Hea~uipment.** 

### and Pool Heaters Test 

### urea,» (Docket 

### No. EE-RM-93-501), 

### both on the 

### document and 

### on the enyelope.



### Theperson making 

### the request should briefly describe the interestcoooerned end state whyhe or she. 

### either individually

### oras 8 

### repl'8iS8Dt8tiYe of


### group or class ofpersons that 

### have such

an interest, is an appropriate spokesperson, and 

### giYe 

### a telephone number where he or she 

### may

## be contacted.

Each person selected to be heard 

### is requested to submit an advance copy of the statement prior to the hearing as 

### indicated atthe beginning of

### this document. Inthe 

### event

### any person wishing to 

### testify cannot

### meet this requirement, that peniOIl 

### may Dlake 

### alternative 

### arrangements with the 

### Clftkle ofHearings 

### and 

### Dock8ls in 

### adv.ance by

50 

### indicating in

### the letterNqU8Sting to 

### mab an 

### oral presentation.

2. 

### Conduct ofHearing

DOE reserves the right to select the persons tobe heard atthe hearing, to 

### schedule the respective presentations. and to establish the procedures governing the conduct ofthe hearing. The length of

### each presentation is 

### limited'to 20 

### minutes.

A DOE official will

### be designated to preside 

### at the 

### hearing. The bearing 

### will
not 

### be • ju(ijcial 01" 

### an 

### evidentiary-type hearing but 

### will 

### be conducted in 

### accordance with 5 U.s.c. 533 

### and !J8dioo 336 

### ofthe Act. Atthe 

### conclusion of

### all initial 

### oral statmneo.ts at each dayofthe hearing,

### each penson who has 

### made an 

### oral statement

### will be 

### given the 

### opportunityto 

### mab• I'8buttal statement, subject to time 

### limitations. The rebuttal statement will begiven in 

### the order in 

### which the 

### initial statements

were made. The official conducting

### the hearing will acceptadditional
comments or questions from 

### those attending. 

### as time permits. Any 

### interested person 

### may submit. to the presiding official. written questionsto be asked of

### any 

### person making a statement at 

### the hearing. 

### The pl'8Siding official will determine whetherthe 

### question is 

### relevant and whether

### time limitations permit itto be presented for

answer.

Furtherquestioning 

### ofspeakers 

### will be permitted 

### by DOE. 

### The presiding official will afford 

### any interested person

an opportunity to 

### question, with respect to disputed issues ofmaterial fact. other interested persons who 

### made oral presaatations.

### aswell

..amployaea

### of the U.S. Governnumt

### who 

### haw IDIlde written or oral preI8IltatioDa,**~** 

### to the proposed.rule.. 

### Thisopportunity will be afforded after any

### l'8buttal statement to the extentthat

### the 

### predding

### official determinaa

### that

### such**~** 

### is 

### likely to result in 

### a lOON 

### timely

.... effective resolution 

### oJdisputed i

__ of material fact. 

### Ifthe time provided is 

### insufficient orinconvenient, DOE 

### will consider affording

# an additic:mal opportunity for questioning at a mutually convenienttime. 

### Persons interested in

### making use ofthis opportunity must submit

### their Nq08Sl 

### to

### the pI'8Iiding officialnolater

### than shortly after the completion ofany rebuttal statements 

### andbepl'8pamd 10 

### state specific

### jUBtificatioA iDcluding why the issue is one ofdisputedfact and how the proposed qilestions would expedite

### theirt'8501ution.

Any furthw 

### procedural

### ftlles regarding properconduct of

### the hearing will be 

### announcedby the presiding official.



### A 

### transcript of

### the

# J.riuswill be made. andthe 

### entirerecordof

### this rulemaking, includingthetranscript. will be retained by DOE and made available for inspection at theDOE Freedom ofInformation Reading 

### Room

as provided at the beginning ofthis document. Any person 

### maypwdlase 8 

### copy ofthe

### tnmscript from 

### the transcribingreporter.


### G.Issuesfor Public Comment

DOE is interested 

### inreceiving
commenta 

### anddata

## CXIDCB:'IliJI8 the 

### acaarac:y and workability

## ofu- test procedures. /Uao, J)()E

# ....-:om.- discussion 

### 110 improY8

.....or alternatiYeS

### tothese 

### approacbea. In particular. ])()E 

### Is 

### in-.tedin gathering COIl1IJleDU 

### on the

## foJ.lowio8.:

• The appropriatBDessof

### a new 

### efficiencydesaiptOl'-8IlDual

### efficiency descriptor-for ventedhomeheetins equipment that includes both the fossil

### fuel and auxiliary electrical energy 

### consumption;

• The appropriateneas of

### a new effiCiency descriptol'-8l1Jlual efficiency deScriptor-for pool heaters that includes burnerand pilot 

### light usage fossil fuel and auxiliary electrical energy consumption;



### • 1beappropriatenese 

### ofa 

### now efficiency descriptCJI'--eDnual 

### efficiency descriptor-for furnaces that includes 

### both fossil fuel and 

### auxiliary electrical 

### energy for indoor installations;

• The appropriateness ofa modified efficiency descriptor--eDergy factOl'-fcr isolated combustion installations; and

• The appropriate1l88S 

### ofa test 

### procedure for 

### furnaces andboilers

### basad

### 44550 

### Federal Register I 

### Vol. 58, No. 161 I 

### Monday, August 23, 1993 I 

### Proposed Rules

on an inpuVoutput method as opposed
to the current and proposed method which measures losses only.

List of

### Subjects in 10 CFR. Part 430

Administrative practice and procedure, Energy conservation, Household appliances.

Issued in Washington, DC. July 23. 1993. Robert 

### L SanMartin, ActingAssistantSecrettuy. EnergyEfficiency andRenewableEnergy.



### Forthe reasons set forth in the preamble, part 430 ofchapter

## n oftitle 10, ofthe Code ofFederal Regulations is proposed tobe amended as set forth below:

PART 430-ENERGY CONSERVATION PROGRAM FOR CONSUMER PRODUCTS



### 1. The authority citation for part 430 continues toread as follows:

Authority: 42 U.S.c.**6291~309.** 

### 2. Section 430.2 is amended by adding definitions for terms "Annual Efficiency" and "Mobile Home Furnace" 

### in alphabetical order. to read

as follows:


## 1430.2 DefInitions. 

# '" '" '" '"

AnnualEfficiency

### meansthe efficiency descriptor for fossil-fueled beating appliences thattakes into account the energy consumed and the useful heat producedby the appliances from both the fossil fuel and the auxiliary electrical energy to the appliences, including a multiplication factor which represents the ratio ofthe energy consumed atthe source of electricity generation (power plant) to the electrical energy delivered at the appliances (site), and that is celculated based on indoor installation for nonweatherized units and outdoor installation for weatherized units. 

## '" 

# '" * * 

## '"

Mobile Home Furnace 

### a direct 

### vent furnace that is installed indoors and designed for use only in mobile homes. 

### * 

### * * * *

3. Section 430.22 is amended as follows:

A. In § 

### 430.22 (n)(l)(i), revise the words "Section 4.8 or 4.10" to read "Section 10.19.2 or 10.20.4" and in 430.22{n)(1)(ii). revise the words "Section 4.9" to read "Section 10.19.3" and revise the words "Section 4" to read "Section 10".

S. In § 

### 430.22 (n)(2). revise the words "Section 4.6" to read "Sections 10.12.2. 10.13.6. and 10.14.2" and revise the words "Section 4.1 ofAppendix N of this subpart" to read "Section 11.1 of ANSIIASHRAE Standard 103-1988".

C. In § 

### 430.22 (n)(3)(i). revise the words "Section 4.11 or4.13" to read "Section 10.22.2 or 10.22.4" and in 430.22(n)(3)(ii), revise the words "Section 4.12" to read "Section 10.19.6.3".



### D. In § 

### 430.22 (n)(4). revise the words "Section 4.14" to read "Section 10.19".

E. In §

### 430.22, add paragraph (n)(6), revise paragraphs (0)(2), (0)(3), and (p)(l) and add paragraph (p)(3) to read

as follows:


## 1430.22 Test procedures for II'I88OUI'M of energy COMumption. 

## '" * * * 

# .. (n) Furnaces 

## '" * 

## '" 

# ..

(6) The annual efficiency for furnaces. expressed in percent. is the ratio ofthe



### sum ofthe annual fossil fuel output of useful energy plus the auxiliary electrical energy recovered as useful heat. to the sum ofthe annual energy inputto the furnace (fossil fuel) plus the energy required to generate the auxiliary electrical energy delivered at the furnace, determined according to section 10.23 and 10.25 ofappendix N



### . ofthis subpart.

(0) 

### Vented Home HeatingEquipment



# .. * * *

(2) The estimated annual operating cost for vented home heating equipment is the sum of:

(i) 

### The product ofthe average·annual fuel energy consumption, in Btu's per year for natural gas. propane, or oil fueled vented home heating equipment, determined according to section 4.6.2 of appendix 

### 0 ofthis subpart, andthe representative average unit cost 

### in dollars perBtu for natural gas, propane,
oroil, as appropriate, as provided pursuant to section 323(b)(2) ofthe Act; plus

(ii) 

### The product ofthe average annual auxiliary electric energy consumption in kilowatt-hours per year determined according to section 4.6.4 ofAppendix 

## oofthis subpart, and the representative average unit cost in dollars perkilowatthours as provided pursuant to section 323(b){2) ofthe Act, the resulting sum then being rounded offto the nearest dollar peryear.

(3) The annual efficiency for vented home heating equipment, expressed in percent. is the ratio ofthe sum ofthe annual fossil fuel output ofuseful energy plus the auxiliary electrical energy recovered as useful heat to the

sum ofthe annual energy input to the vented home heater (fossil fuel) plus the energy required to generate the auxiliary electrical energy delivered at the vented home heater determined according to section 4.6 ofAppendix 

### 0 ofthis subpart. 

### * 

### * * * 

### * (p) Pool Heaters



### (1) The estimated annual operating cost for pool heaters Is the 

### sum of:

(i) 

### The product ofthe average annual fuel energy consumption, in Btu's per year ofgas, or oil fueled pool heaters. determined according to section 4.2 of Appendix P 

### ofthis subpart, and the representative average unit cost in dollars perBtu for gas or oil, as appropriate, as provided pursuant to section 323(b){2) ofthe Act. plus

(ii) 

### The product of**~e** 

### average annual auxiliary electric energy consumption in kilowatt-hours peryear determined according to section 4.3 ofAppendix P ofthis subpart, and the representative average unit cost in dollars perkilowatthours as provided pursuantto section 323(b){2) ofthe Act, the resulting sum then being rounded offto the nearest dollar per year. 

### * * 

## * * 

### *

(3) The annual efficiency for pool heaters, expressed in percent. is

### the ratio ofthe annual fossil fuel output of useful energy, to the sum ofthe annual energy input to thepool heater (fossil fuel) plus theenergy required to generate the auxiliary electrical energy delivered at the pool heater. determined according to section 4.1 ofappendix P 

### ofthis subpart. 

### * * * * *

4. Appendix N 

### to subpart B ofpart 430 is 

### revised to read as follows: Appendix N 

### to Subpart B ofPart 430- 

### Uniform 

### T

..Method for Measuring the Energy Consumption of

# rumaces and Boilers

1. 

### Scope. The scope ofthis appendix shall be as specified in section 2.0 ofANSU ASHRAE Standard 103-1988.

2. Definitions. Definitions shall include the definitions specified in section 3.0 ofANSU ASHRAE Standard 103-1988 and the following additional definitions:

2.1 Annual efficiencymeans the ratio of annual output energy to annual input energy whicb includes botb fossil fuel and auxiliary electrical energy. Tbe annual output energy includes the auxiliary electrical energy recovered as useful beat. Tbe annual input energy includes any non-beating season pilot input loss and a multiplication factor to the auxiliary electrical energy input at the appliances wbich represents the ratio ofthe energy consumed at the source ofelectricity generation to the electrical energy delivered
at tbe appliancas.

2.2 ANSIIASHRAEStandard 103-1988

means the test standard publisbed in 1988 by ASHRAE. approved by ANSI on August 28,

### Federal Register / Vol. 58, No. 161 / Monday, August 23, 1993 / Proposed Rules 

### 44551

1988. and entitled "Methods ofTesting for AFUE ofResidential Central Furnaces and Boilers."

2.3 ASHRAEmeans the American Society ofHeating. Refrigerating. and AirConditioning Engineers.

2.4 Inlet damper means a type ofelectromechanical damper upstream ofthe burner combustion air inlet that isan integral part ofthe burner and which Is designed to automatically open the air flow passage to the burner box combustion air inlet when the burner is on and to automatically close off the air passage and rastrict the air flow through the heat exchanger when the burner is off.

2.5 Postpurge means the design that permits the continued operation ofthe combustion blower in a power vented unit. powerburner unit. or forced draft unit for a period oftime after the main burner is shut offfor the purpose ofventing ofresidue flue gases in the heat exchanger and the venting system.

2.6 Thermal stack damper means a type ofstack damPer which is dependent for operation exclusively upon the direct conversion ofthermal energy ofthe stack gases to open the damper.

3.0 ClaSSifications. The classifications shall be as specified in section 4.0 ofANSI/ ASHRAE Standard 103-1988. Substitute sections 3.1.3.1.1.3.1.2.3.1.3 and 3.1.4 of this appendix for sections 4.8. 4.8.1. and 4.8.2. ofANSIfASHRAE Standard 103-1988.

3.1 Off-Cycle Devices. 3.1.1 Stack damper. 3.1.2 Electro-mechanical inlet damper. 3.1.3 Electro-mechanicalflue damper. 3.1.4 None. 4. Requirements. Requirements shall be as specified in section 5.0 ofANSI/ASHRAE Standard 103-1988.

5. Instruments. Instruments shall be as specified in section 6.0 ofANSI!ASHRAE Standard 103-1988.

6. Apparatus. The apparatus used in conjunction with the furnace or boiler during the testing shall be as specified in section 7.0 ofANSIIASHRAE Standard 103-1988. Substitute sections 6.1. 6.2. 6.3, 6.5. 6.6 and 6.7 ofthis appendiX. respectively. for figure 1 of sections 7.2.1.1. 7.2.2.1. 7.2.2.2. 7.2.3.1. 7.3.2.1.7.3.2.2.7.3.3.1 and 7.3.1. and figure 6 is substituted with-figure 1 ofthis appendix. supplement sections 7.2.2.3 and 7.3.2.3 with additional specifications as described in section 6.8 ofthis appendix. and section 6.4 ofthis appendix which supplements the apparatus section ofANSII ASHRAE Standard 103-1988:

.

6.1 Gravity central furnaces. Note 2 in figure 1 of section 7.2.1.1 ofANSI/ASHRAE Standard 103-1988 is replaced with the following: Note # 2. 2" insulation (optional) with K=0.27 Btuein.l(hr-ft 2. oF).

6.2 The following paragraphs supplement the requirements specified in sections 7.2.2.1 and 7.3.2.1 ofANSI/ASHRAE Standard 103- 1988:

For units equipped with integral draft diverters which are mounted in an exposed position (not inside the overall unit cabinet).

cover the diverter boxes (excluding any openings through which draft relief air flows) before the beginning of any test (including jacket loss test) with insulation having Rvalue ofnot less than 7 hreft 2.o FlBtu and an outer layer of aluminum foil. For units equipped with integral draft diverters which

are enclosed within the overall unit cabinet, insulate the draft diverter box with insulation described above before the cool-down and the heat-up tests described in sections 9.5 and 9.6 ofANSIIASHRAE Standard 103- 1988. respectively. Do not apply the insulation for the jacket loss test (if conducted) described in section 8.6 vfANSI/ ASHRAE Standard 103-1988 and the steadystate test described in section 9.1 ofANSII ASHRAE Standard 103-1988.

For furnaces equipped with draft hood and

an electro-mechanical burner box inlet damper or an electro-mechanical flue damper. cover the 5-ft tes! stack with insulation having R-value ofnot less than 7 and an outer layer ofaluminum foil before conducting the tracergas measurement'for the determination ofthe off-cycle loss factor KL described in section 8.9 ofthis appendix.

6.3 The following paregraph supplements the requirements specified in sections 7.2.2.2 and 7.3.2.2 ofANSI/ASHRAE Standard 103- 1988:

Forunits with power burners. cover the flue collection box with insulation having Rvalue ofnot less than 7 and an outerlayer ofaluminum foil before the cool-down and heat-up tests described in sections 9.5 and 9.6 ofANSIIASHRAE Standard 103-1988. respectively. However. do not apply the insulation for thejacket loss test (if conducted) described in section 7.3 ofANSI! ASHRAE Standard 103-1988 and the steadystate test described in section 9.1 ofANSlf ASHRAE Standard 103-1988. For power vented units. insulate the shroud surrounding the blower impeller with insulation haVing an R-value ofnot less than 7 hreft 2. 0F/Btu and an outer layer of aluminum foil before the cool-down and the heat-up tests. Do not apply the insulation for the jacket loss test (ifconducted) and the steady-state test. Do not insulate the blower
motor or block the air flow openings whose purpose is for cooling ofthe combustion blower motororbearings.

6.4 Down flow furnaces. Install the internal section ofvent pipe the same size as the flue collar for connecting the flue collar
to the top ofthe unit ifnot supplied by the manufacturer. Do not insulate the internal
vent pipe during the jacket loss test (if conducted) described in section 8.6 ofANSI/ ASHRAE Standard 103-1988 and the steadystate test described in section 9.1 ofANSlf ASHRAE Standard 103-1988. Insulate the internal vent pipe before the cool-down and heat-up tests described in sections 9.5 and 9.6. respectively. ofANSI/ASHRAE Standard 103-1988 with insulation having R-value of
not less than 7 hreft2.oF/Btu and an outer layer of aluminum foil. Ifthe vent pipe is surrounded by a metal jacket. insulate the metal jacket with insulation as described for the vent pipe above. Install a 5-ft test stack of tbe same cross sectional area or perimeter

as the vent pipe above the top ofthe furnace. Tape or seal around the junction connecting tbe vent pipe and the 5-ft test stack. Insulate the 5-ft test stack with not less than R-7 insulation and an outer layer ofaluminum foil. See figure 2 ofthis appendix. 6.5 The following paragraphs supplement the requirements specified in section 7.2.3.1 ofANSI/ASHRAE Standard 103-1988:

For units with an integral draft diverter.

cover the five feet ofstack with insulation having R-value ofnot less than 7 hr-ftz.oFI Btu and an outer layer ofaluminum foil. For units with draft hoods. insulate the flue pipe between the outlet ofthe furnace and the draft hood with insulation having R-value of
not less than 7 hr-ft 2e°F/Btu and an outer layer ofaluminum foil.

,

For units with integral draft diverters which are mounted in an exposed position (not inside the overall unit cabinet), cover the diverter boxes (excluding anyopenings through which draft reliefair flows) before the beginning ofany test (includingjacket loss test) with insulation having R-value of
not less than 7 hreft z.oF/Btu and an outer layer ofaluminum foil. For units equipped with integral draft diverters which are enclosed within the overall unit cabinet. insulate the draft diverter box with insulation described above before the cool-down and the heat-up tests described in sections 9.5 and 9.6 ofANSIIASHRAE Standard 103- 1988. respectively. Do not apply the insulation for thejacket loss test (if conducted) described in section 8.6 of ASHRAE Stand6I'd 103-1988 and the steadystate test described in section 9.1 ofANSI! ASHRAE Standard 103-1988.

6.6 The following paragraph supplements the requirements specified in section 7.3.3.1 ofANSlfASHRAE Standard 103-1988:

For units with an integral draft diverter.

cover the five feet ofstack with insulation having R-value ofnot less than 7 hr-ftz.oFI Btu and an outerlayer ofaluminum foil. For units with draft hoods. insulate tbe flue pipe between the outlet ofthe furnace and the draft hood with insulation baving R-value of
not less than 7 breft2eOf/Btu and an outer layer ofaluminum foil.

For units with integral draft diverters which are mounted in an exposed position (not inside the overall unit cabinet). cover the diverterboxes (excluding any openings through which draft reliefair flows) before the beginning ofany test (includingjacket loss test) with insulation having R-value of
not less than 7 breft2e°F/Btu and an outer layer of aluminum foil. For units equipped with integral draft diverters which are enclosed within the overall unit cabinet. insulate the draft diverter box with insulation described above before the cool-down and the heat-up tests described in sections 9.5 and 9.6 ofANSIIASHRAE Standard 103- 1988. respectively. Do not apply the insulation for the jacket loss test (if conducted) described in section 8.6 ofANSII ASHRAE Standard 103-1988 and the steadystate test described in section 9.1 ofANSlf ASHRAE Standard 103-1988.

6.7 Piping. Substitute the following paragraph for section 7.3.1 ofANSIfASHRAE Standard 103-1988:

See figure 1 ofthis appendix and figures 7,8. and 9 ofANSIIASHRAE Standard 103- 1988 for typical piping arrangements for hot
water and steam boilers includingelectric boilers.

6.8 Oil-fueled or power gas forced air central furnaces oroil-fueled or power gas

### 44552 

### Federal Register I 

### Vol. 58, No. 161 I 

### Monday. August 23. 1993 I 

### Proposed Rules

1_pressure and hot waterboilen. The following paragrapb supplements the requirelll8l:lts specified in sections 7.2.2.3 and 7.3.2.3 ofANSlI ASHIlAE Standard 103- 1988:

Adju.tmeDt ofdraft is to be done only on urHts with barometric draft control.

7. Testing 

### conditions. The testing conditions sball be lIS specified in ll8ction 8.0 ofANSlJASHRAE Standard 103-1988 with the exception ofsections8.2.1.5.2. 8.6.1.1. Table 6. and sections 8.•.2.1. 8.8.2.2.**a~8.3** and 8.8.4.1 wbich are nnriAd lIS described in sections 7.1. 7.2.. 7.3, 7.4..1. 7.4.2. 7.4.3 and 7.6 ofthis appendix. respecti¥ely.1l1Jd the inclusiOD 

### 01. additionaltest COIlditions 

### as desai.bed In section 7.5 ofthis appendix.

7.1 The fullowing JlU88I1lph supplements the requir8meJJt specified in Menon 8.2.1.5.2 ofANSIJA.SHRAE Sbmdard 103-1988:

ForUIlits wbich employ 

### a draft hood and equipped wilD aD electm-mecbanical burner inlet damper(.: an electro-mechan.ical flue damper upstream oftheGraft hood. inMallan additional thennocouphtgrid in a bomonlal plane in the 5-fttest stack described in section 7.2.2.1 ofANSIIASHRAE Standard. 103-1988 and in section 6.2 ofthis appendix. located one fuot from thea.tstack inlet (use fIgures 3A ud38 ofANSI!ASHRAE Standard 103-1988 for refereBce in the installation ofthe thermocouple grid in the
test stack).

7.2 The fullowing paragraphs supplement the requi_ts .pecified in section 8.6.1.1 ofANSIIASHRAE Standanll03-1988:

Forfumed 

### llirc:entnU 

### fumacee'. the circulatingairblowercompartment is considered 

### as part ofthe duct system and no surface**t~ ~ment**  ofthe blowerCOI1Ip8l1ment needs to be recorded for the**p~** ofthis test.

For 

### uaH.with veJltiJatioD air openings on the top. frnDt. 

### orside. ofthe unit. those

. openings from which the -ulation air exits from the abiaat

### shallbetaped 

### ow sealed with aluminum tape durins this

### teSt. A lIlllOke test daring allteady-state test maybe used to determine the openinglI where the ventilation air exits from 

### the cabinet. 00 the taped openinga. subdivide the aree into the normal 36 sq. in. grids as in section 8.6.1.1 ofANSI! ASHRAE Standard 103-1983 and measure the surface UmJper8tures ill**~** grid with a surface thermocouple. Install the thel1llOCOUp1e OYer the aluminum tape if 1l8C8SfIIIIy.

For down flow furnacea. measure 

### all cabiaet surface temperatures ofthe heat exchanger andcombustion section. including the bottom around the outlet duct and the burner door. using the 36 sq. in. thermocouple grid delCribed in section 6.6.1.1 ofANSIJASHRAB Standard 103- 1983. Ifthebum

... door is lOuvered to allow for combustion air to ent

.... measure temperatures ffil the metal stripsbetween the louY9l'S using the nor:mal3ti SCI- in. grid. The cabinet surface temperatures around the blower sactiou do not need to be measured (see figure 2). and the taping ofthe ventilation airopeniIlss shall be as described above.

7.3 System Numbers. Substitute tabla 1 of tl:is appendix for Table 6 of ANSIJASHRAE Standard 103-1983. 7.4 Optional tracer gas method fO& determining draft factors [)Po 

### IlF. and 

### Os for systemsequipped with power burDen

### ow direct vent.

7.4.1 The following paragraph supplements the requirements specified in section 8.8.2.1 ofANSI/ASHIlAE Standard 103-1988:

For units with step modulating controls. the optional tracergas procedure 

### sball be conducted during the cool-down test deacribed in section 9.7 ofANSIJASHRAE Standanl103-1938 at the reduced 

### input rate only. For UDits with two stage modulatiDg controls. ifthe optional tracergas procedure is amducted during the cool-down test described in section 9.7 ofANSIIASHRAE Standard 100-1988 at the reduced input rate, it shall alsobe conducted at the maximum inputrate. and vice**~**

7.4..2 Substitute the W01'ds "OIl system. for whrch the stack 

### damper is 

### to becu-i during the cool-down test ..• " for thefirst

S8Bhmce ofsection 8.1.2.2 ofANSUASHRAE 8mndard 103-1988 andremove the words "fll:le or" in the fint tine ofsection 8.8.2.2 ofANSI/ASHRAE Standard 103-1988.

7.4.3 The value 0.00001 at the end of sectiO!! 8.8.3 ofANSIJASHRAE Standard 103-1988 is substituted with the value 0.05.

7.5 Method fur det9rminill8 off.qcle loss factor KL fur atmospheric systems with an integral draft diverter ordraft hood and equipped with eitheran electro-mechanical inlet damperor with an electro-mechanical flue damper upstream ofthe draft diVMtel' or draft hood that restricts the flow through the heat exchangerin the off-cycle. The following paragraph is an additional subsection under section 8.8 ofANSI! ASHRAE Standard 103-1988. The method shall apply only ifthe electro-mechanical damper (inlet damper orflue damper} closes completely within 10 seconds after the burner shuts off. Determine 

### Kt.. (the ratio of off-cycle sensible heat loiS tested with the electro-mechanical damper (inlet damper or flue damper) closed during the off-cycle to the off-cycle sensible heat loss tested with the electro-mechanicaI damper held open during the off-cycleJ during two additional lo-minute duration cool-down tests. Conduct these two additional cool-down tests after the cool-down and heat-up tests described in sections 9.5 and 9.6 ofANSI! ASHRAE Standard 103-1988 are completed. During a short burneroffperiod before the two additional cool-down tests but after the completion ofthe heat-up test. cover the 5· ft tes.t stack with insulation on units equipped with draft hood as described in section 6.2 ofthis appendix, and. on units equipped with integral draft divarter. remove the blocking over the draft reliefopening and the restriction over the test stack outlet but keep the insulation over the rest ofthe draft divarter surface on (see section 9.1.4 of ANSIIASHRAE Standard 103-1988}. Conduct the first additional cool-downtest by fIrst running the unit until steady-state conditions are reached (see section 9.1.2.1 of ANSIIASHRAE Standard 103-1988} and then shutting the unit off with the electromechanical damper adjusted or bypassed so that the damper is held open duringthe resulting cool-down period. After the cooldown period. conduct the secOD<! additional

coo'-down test by again running the unit until steady-state conditions are reached and then shuttingthe unit offbut with the electro-mechanical damper operating

### as designed during the resulting cool-down period. Measurethe stack

### gas mass flow rata (Ms,OFFJ and the stack.gas temperature during the two additional cool-down period. described above at between 5 and 6 minutes into the cool-down period using tracergas as described in section 8.9 ofthis appendix and compute the olf-cycle sensible heat losses

over this ORe minute interval and the loss factor 

### Ki.. with the calculation procedures as descn1Jed in section 10.16 ofthis appendix.

7.6 The following paragraph supplements the requirements as specified in section 8.8.4.1 ofANSI! ASHRAE Standard 103- 1988:

Note that the area As is the cross sectional

area ofthe ftue pipe. notthe area inside any ring that is attached to the inside ofthe flue pipe. Measure the anI8 ofany holes or cut
outs in the stack damper**b~~!;** 

### Ao,D. and eithermeasure orobtain the manufacturer ofthe stack damper leakage

area. AOJ-. at the dampershaft and around the damperedge

# wmm the damper is 

### at the closed position. Both areas shan bemeasured
at the plamrofthe damper.

8.0 Test procedure. Testing and measnremeftts shall be as specified in section 9.0 ofANSI/ASHRAE Standard 103-1988 with tbe exception ofsections 9.5.1.1 and 9.5.1.2.1 which are substituted by sec:tiom 8.2 and 8.4 ofthis appendix. respectively. and sections 9.1.2.• 9.1.2.2.1. 9.1.2.2.2. 9.1.2.3.1.9.5.1.2,9.5.1.2.1.9.5.1.2.2.9.5.2.1, 9.5.2.3.9.6.1.9.7 and 9.10 are replaced by sections 8.1. 8.3. 8.5. 8.6. 8.7 

### and 8.8 ofthis appendix. respectively, and the inclusion of the additional procedures in sections 8.9. 8.9.1 to 8.9.7 and 8.11 ofthis appendix. 

### as follows:

8.1 Steady-State Condition and Requirements.

8.1.1**In~9.1.2.2.1and9.1.2.2.2of** ANSlIASHRAIi Standard 103-1988. inthe
sentence ".

. . measure the steady-state electric powerto thepowerbumef'on units

so equipped..

... substitute theword bumtJr for the phrase powet' burner. Also in sections 9.1.2.2.1 and 9.1.2.2.2 ofANSlIASHRAE Standard 103-1983, substitute the following for the last sentence "For bot water boilers.

use a steady-state waterpump power of0.13 kW.":

"For hot water

### boUers. measure the steedy·
state electrical power to the water pump the

same way asfor the air blowets for furnaces. See section :'.7, Fig. 11 of ANSIIASHRAE Standard 103-1988."

8.1.2 The fuUowing paragraph supplements therequirementspecified in sections 9.1.2.2.1 and 9.1.2.2.2 ofANSlI ASHRAE Standard 103-1983:

For bumers equipped with an intermittent

or interrupted ignition device (electric spark ignition. glow coil, or bot surface. etc.) also

measure the total electric power to the bumer when the device is on. PET. Measure and record too length ofthe time intet'Val when the interrupted ignition device is on, 4<-

.. with

a stop watch.

8.1.3 Thefollowing paragraph supplements the requirement specifIed in

### Federal Register I 

### Vol. 58, No. 161 I 

### Monday, August 23, 1993 J 

### Proposed Rules 44553

section 9.1.2.3.1 ofANSUASHRAE Standard 103-1988:

On units employing draft hood. secure a sample ofthe stackgases at either a horizontal plane in the stack 12 in. downstream ofthe draft hood or in a horizontal plane 6 in. from the top ofthe test stack. Make sure that there are no holes or air leaks in the section ofthe stack from the draft hood up to the location where the stack
gas is sampled. Determine the concentration by volume ofcarbon dioxide (CG.z.s) present in dry stackgas. Use figures 3A and 3B (test stack for units with draft diverter) as , reference for the location of

### CO:z

measurement.

8.2 

### Gas- and oil-fueled gravity and forced air central furnaces without stack damperscool-down test. The following paragraphs are in place ofthe requirements spacified in section 9.5.1.1 ofANSUASHRAE Standard 103-1988:

Turn offthe main burner after steady-state testing is completed and measure the flue gas temperature by means ofthe thermocouple grid described in section 7.6 ofANSII ASHRAE Standard 103-1988 at 1.5 (TF.QFF(t))) and 9 minutes (TF.QFF(4» after burner shuts off. An integral draft diverter shallremain blocked. insulated. and the stackrestriction shall remain in place. On atmospheric systems with an integral draft diverter or draft hood and equipped with either an electro-mechanical inlet damper or

an electro-mecbaniclal flue damper which closes within 10 seconds after the burner shuts offto restrict the flow through the heat exchanger in the off-cycle. bypass or adjust the control for the electro-mechanical damper 

### so that the damperremains open during the cool-down test.

For furnaces that employ post pwge,

measure the length ofthe post purge period with a stopwatch. The time from burneroff
to combustion blower off(electrically deenergized) shallbe recorded as tp. Measure the flue gas temperature by means ofthe thermocouple grid described in section 7.6 of ANSI/ASHRAE Standard 103-1988 at the end ofpost purge period tp (TF.QFF(tP» and at the time (1.5+tp) minutes (TF.OI'F(t))) and (9.o+tp) minutes (TF.0FPt4» after the main burner shuts off. For the 

### cases where the measured tp is lesa-Jban orequal to 5 seconds, it shall be tested as ifthere was no post purge.

8.3 In section 9.5.1.2 ofANSI/ASHRAE Standard 103-1988. substitute the following
sentence for the sentence "For oil-fueled or power gas burner furnaces. maintain the draft in the flue pipe within

### to.ot in. ofwater gage ofthe average steady-state draft.":

"For oil-fueled or power gas burner furnaces employingbarometric dampers for draft control. maintain the draft in the flue pipe within 

### to.Ol in. ofwater gage ofthe
average steady-state draft."

8.4 Gas- and oil-fueled gravityandforced aircentralfurnaces without stack damperscool-down 

### test. The following paragraph is in place ofthe requirements specified in sections 9.5.1.2.1 and 9.5.1.2.2 ofANSI! ASHRAE Standard 103-1988:

For a furnace with adjustable fen control. this time delay will be 1.5-minute for condensing furnaces. For non-condensing furnaces with adjustable fan control. this delay shall be 3.O-minute oruntil the supply air temperature drops to a value of40°F above the inlet air temperature whichever results in the longest fen on-time.

For a furnace without adjustable fen control or with the type ofadjustable fan control whose range ofadjustment does not allow for the delay times specified in the above paragraph. the control shall be bypassed and the fan manually controlled to give the delay times spacified in the above paragraph.

For a furnace which employs a single
motor to drive the powerburnerand the indoor air circulating blower. the power burner and indoor air circulatingblower shall be stopped together.

For a powerburner employing post purge where the post purge period is controlled by the fan control during the cool-down period. the fen control shall be adjusted 

### to give a time as spacified above and the combustion blower and the fan shall be stopped together

. as designed.

8.5 Gas- and oil-fueled boilers without 

### stackdampen. The following paragraph Suppleml!nts therequirements spacified in section·9.5.2.1 ofANSUASHRAE Standard 103-1988:

Forboilers that employ post purge.

measure the length ofthe post purge period with a stopwatch. The time from burner off
to combustion bloweroff(electrically deenergized) shall be recorded 

### as tp. Measure the flue gas temperature by means ofthe thermocouple grid described in section 7.6 of ANSIIASHRAE Standard 103-1988 at the end ofpost purge period tp (T F.oMtp) and at the time (3.75 + tp) minutes (TF.oMt3)) and (22.5 + tp) minutes (TF.QFF(4)) after the main burner shuts off. For the 

### cases where the measured tp is less than orequal to 5 seconds. it shall be tested as ifthere was no 

### post purge.

8.6 In section 9.5.2.3 ofANSUASHRAE Standard 103-1988. substitute the following for the sentence "Foroil-fueled

### or powergas burner units not equipped with stack dampers. maintain the draft in the flue within the same ranges spacified in section 9.5.1.2.":

.

"Foroil-fueled or power

### gas burnerunits employingbarometric dampers for draft control and not equipped with stack dampers. maintain the draft in the flue within the same ranges spacified in section 9.5.1.2."

8.7 The following paragraph supplements the requirements spacified in section 9.6.1 of ANSI/ASHRAE Standard 103-1988:

For a unit designed to operate with an unvarying time delay (case 3 described in section 9.6.1 ofANSIIASHRAE Standard 103-1988). the unit shall operate as designed except that the time delay shall be not less than 20-second. Ifthe delay is less than 20 seconds. the blowercontrol shall be bypassed and the blower started manually 20 seconds after the burner starts up. Ifthe time delay is adjustable by dip switch orjumper terminals. select the time delay closest to the 1.5-minute specified except when the maximum time delay that can be selected is less than 20 seconds in which case the blower control shall be bypassed and the blower started manually 20 seconds after the burner starts up.

8.8 Optional tracer

### gas test procedures for determining draft factors for I)p, 

### DF. and 

### Ds for systems equipped with powerburners 

### or direct vent and notequipped with stack dampers. The following are deletions and additions to sections 9.7 and 9.7.3 ofANSU ASHRAB Standard 103-1988:

8.6.1 In section 9.7.3 ofANSUASHRAE Standard 103-1988. the sentence "At the

same time. ifdraft is not maintained during the cool-down. measure the flue 

### gas temperature. TF.oA'. using the thermocouple grid described in section 7.6." is replaced with: At the same time. measure the flue 

### gas temperature. TF.oFF. using the thermocouple grid descriQ6d in 7.6.

8.8.2 The following paragraph supplements the requirements specified in section 9.7.3 ofANSUASHRAB Standard 103-1988:

For systems employing post purge with post purge time period tp (see sections 8.2 and 8.5ofthis appendix). measure the percent volumetric concentration ofthe
tracergas present in the diluted flue gas sample. Or, atbetween (5+tp) and (6+tp) minutes after the burner shuts off. During the



### same time period. measure the flue gas temperature. TF.oFF, using the thermocouple grid described in section 7.6 ofANSU ASHRAE Standard 103-1988.

8.8.3 Substitute the value 0.05 for the value 0.00001 at the 

### endofthe paragraph in section 9.7.4 ofANSI/ASHRAB Standard 103-1988.

8.8.4 For units with two stage modulating controls the optional tracer

### gas test shall be conducted atboth the maximum and the reduced inputs. For units with 

### step modulating controls, the optional tracer gas test shall be conducted at the reduced input only.

8.9 Tracer

### gas test procedures for determining off-cycle loss factor 

### Kt. for atmospheric systems with integral draft diverter ordraft hood and equipped with either an electro-mechanical inlet damper or

an electro-mechanical flue damperthat restricts the flow through the heat exchanger in the off-cycle.

.

8.9.1 The tracer

### gas chosen for this task should have a density which is less than or approximately equal 

### to the density ofair. Use

a 

### gas that is ofa different chemical spacies

or different concentration from the flue 

### gas to be measured and unreactive with the environment to be encountered. Obtain the concentration oftracer

### gas present In the flue
gas sample (Or) using an analyzer or instrument with accuracy of±2 percent in the measured value. Determine the temperature ofthe tracer gas enteringthe flow meter (TT) and the barometric pressure (PB).

8.9.2 After the completion ofthe heat-up
test in section 9.6 ofANSI!ASHRAE Standard 103-1988, 

### tum the burneroff. On units equipped with an integral draft diverter. remove the blocking over the draft diverter and the restriction In the test stack that are installed during the steady-state test (in preparation for the cool-down test) in section 9.1.4 ofANSU ASHRAB Standard 103-1988. Do not remove the insulation covering the draft diverter surfaces. On units

### 44554 

### Federal R.egister 

### I 

### Vol. 53, No. 161 I 

### Monday, August 23. 1993 I 

### Proposed Rules

equipped with draft hood. C091Il" the s-ft test stack with insulation materialwith R-value ofIlO

### len tI!an 7**~"F'1Btu** and !til outer layerofalumiDtHD foil

..deIaibed in sedWn 6.2 

### olumappendix. Inthe mea time.**~e** and feed theambient airto the
tracer8Uanalyaer and MCOld the background roIK:8Iltration 

### Crs oftha tnK:er gas to be used for thtttest (0Il9 data pointis usually IRlfficient).

8.9.3 T'Um the bl1l'Dflr on until steadystaIB CODditiODS imt 8IJ&in achieved

.. specified in section 9.1.2.1 ofAHSII A5HRAE Standard 103-1988. Tum 

### tIte burnerofffor

a lo-mill'Utl&cool-down period. Adjustor bypess th&electlo-mecbanical dllll'JfMlr (inlet damper or flue damper) 80that itremains open during this cool-doWl!l period. Within

one minute after the unit is shut offto start thiscool-down test. begin filediDg a trace!'

## sas with a known, C8ltified ooucentratiOD

### Grm at

a constant flow rate VT into the lowerpart ofthetest 

### stadjustaboY&the test pJaae where tbelItack tllemIocouph grid ill Ioca8l!ld (see section 8.2.1.S.1 ofAHSIlASHRAB Standard 103-1988). Periodically**~** the valueofVT withe iIlstaa4lmeou.sIy reading flow 

### met.

## J:rrrias III

### acauacy of±3 pen:eot oftheq_titymeasured and maintain thatvalueoftracer 8M flow rat6at leRthan ODepen:entoftheair flowrate through theteststack.

8.9.4 Within ODe minuteafter the tracer gas flow is started. conuect:the tracer gae sampling line tothe sampling probe located
at a pI_iMide and 6 in. below thetope?rit ofthe test stack. Measure the transport delay time which is equal to thetimebetween tbe connecti1l8 ofthe sampqline and the initial resptH!l!I& ofthe tracer

### gee analyzer. Add to this transport time thetimereqni!ed furthe anal)'38\" 

### toI88Cb 90pemmtofit» steady-state

.. rue ae specified in the analyzer's operation manual. The sum of these two 'ftlue8 is

### the tracer (pili sample delay time It89ded to match the conceDtratioa meaeurement to the**tempentnre~** iD the off-period lOIS calculatioa. Meke sure fltat a wellmixed sampleis 

### collected by

# ums a multi-hol& sampling probe as recommeII.ded in Appendix D. section B ofANSIIASHRAE Standard 103-1968. Return the sample 

### gas (after exitingthegas amUyzeot)

### letthe topof the test stack downstream oftirephmeof collection.

8.9.5 At5 mimmll aftertheunit is shut off
to startthecool-down test. mtI8SUl'9 ItDd record thepercent volumetric concentratioll oftracergtIS present inthestack gas sample. 

### Cr. at the klcatioD specified in section 8.9.4 ofthis appendix. At the same time. me&SttI"e the stack gas femperatuJ'e. Ts.Of'F. using the th8l"ll1OCOUple

## srid in the test plane (see section 8.2.1.5.1 orANSUASHRAB Standard 103-1988). Thedata Illt!MU1'II'fJlnt and recording shouldbe dODe at a time interval.**~t.** of5 second. for the next 2 to 3 minutes. Tne exact length oftime required fixthe
tracer gas data measurement isequal tothe
tracer gas sample delay time (see section 8.9.4 ofthis appendix) plus 1 minute. (Even though onlyoue minute oftracergas data are required for the computation ofthe off-cycle loss. the longertime is needed to take into
account the time delay between the concet!ltration data andthe**t~** det"" Slop the tracergas injection aDd sampling after tbe required data are_!IUJ'9d 8Bd recorded. DisconBect the tracer

## sulIIIIBpling line from the sample probe and sample the ambient airto£leer the line.

8.9.6 At the eud of

### tM lo-mimlte cooIdOWft period. tum OIl the burneruntil steedystate conditionsareagain achieYed aw specified in section 9.1.2.1 ofANSI!ASHRAE Standard 103-1988. Tum theburnerofffor another 1o-minutecooI-down period. Let the electro-mechanical damper (inlet damper or flue damper] close the way it is designed to. Repeat the test steps ofsections 8.9.3 through 8.9.5 ortbilil appendix except that the electromechanical damper is to ramain closed. Note that the tracer gas feeding rate. VT, may have
to be adjusted to 

### a lower rate to keep the sample concelltlation withinthe range ofthe
gas analyzer 

### used.

8.9.7 The rate ofthe stackgas flow 

### through. the 

### stack. the off-cycleS8JlSibIe loss rate. and the loss factor**~** are calculated by the equations insact.i0ll 10.1i ofiliis appendix.

8.10 Substitute the value O.OS for the value 0.00001 inthe first sentence ofsection 9.10 ofANSiiASHRAE Standard 103-1988.

8.11. Direct measurement of off-cycle losses testiDg method.

9. /V{)mesu;/ature. Nomenclature shall include the nomenclabtr& specified in section 10.0ofANSIIASHRAE Standard 103- 1988 with theexatptioD ofthe variables Me.PH eel Qc which are !&Vised in this appendix andthe following additional variables: A.&=Annnal Efficieacy. percent 

### Ao=minimum opeDing area (mduding leakage) ofliltack 

### Qamper wli&en 

### closed.**i~**

=Ao.noosO+Ao.L**A~** _ (holas aDd cut-outs) in 

### sack damperplate. in2**Ao.L~** area arowtd 

### ltac:lr.: damptil' shaft md dmaper

## .ts-.iul Cnt=concatratioDbyYOlume 01 thetracer gas in the

### badgrocmd. peJalOt Drn=infiltraOoa COmtctiOl1 factor for stack damper

### effecti_ Kt.=off-cycle loss factor for atmospheric burnerwith 

### burner ialet damper or with flue damperupltre&IB oftha integral draft diverter or dra.t\ hood Me=mass ofcondensate. Ib PE=electrical power toburner under steadystate operation. kW PEr=total e1edricaI powertoburnerwhen the electrical intermittentorinterrup(ed ignition devk:e ifemployed is on. kW PEIO=PEr-PE. el«:trU:al power tothe electrical intermittent orinterrupted i8nition de\Jice. kW Qc=fuel 8Il6F8Y input durin8 entire (3 or 6 test cycles)cyclic condensatecollection
test. Btu CJs.QFF"'Off-cycle sensible loss rate. Btu/min. Qs.OFf""l minute sum ofthe measured**qs.~t.** where At is defined below. Btu tVELAy=delay time. sum oftracer gas analyzer response time to reach 90 percent ofthe steady statevalue and the gas transport time delay. minutes tlG=electrl:cal intermittent or interrupted ignition device on-time. minutes tp:::powerhomer postPurse time parrod. minutes TF.()F!'(tp)=ofH:ycle flue pitemperatuJeat the end ofpowerburner post pul!8 period. "F YIG=ratio ofelec:trical iDtermittent or iloltBmlpted

### i8nftioa *riceon-time to average bumeroa-time yp::ratio ofpowertNmur combustion blower on-timeto

### IMmI88 burneron-timf!l At=time interval between each ID88lUnl1Deut oftemparaftlr8 fJFtracer

## sas concemratioo. INICOftds 10. Cillculation of derivedresultsfrom 

### test
measurements. Calculations shall be as specified in section 1LO ofANSf/ASHRAE Standard 103-1988 with the exception or sections 11.2.4. Table 7 (ofsection 11.2.6). 11.2.9.4,11.2.9.6. 11.2.9.9.11.2.9.14. 11.2.9.16.11.2.9.19,11.2..9.20.11..2.10.8. 11.2.10.8.11.2.11.11.2.12.11.3.12. 11.4.B.1..2. 11.4.8.5. 11.4.S.8.. 11.4.8_10, 11.4.12.11.5.12. 11.1U.lt.7.1.11.7.%. 11.2.9.18. 11.4. 11.5 and AppendixE wbich

are substituted.and the inclusion of additional caICtllationsin sections 10.16, 10.17.10.18, 10.19and 10.21 of'this appendix. as ronows:

10.1 Remmre thewords 

### "oilorpower"" in the first sentem:e oftile second pmagraph of section 11.2".4 ofANSflASHRAE Standard 103-1983 and the beginning**oft~e** $ent.nee is substituted by "Porgas furnaces and boilers requiring draftrelief:". Thefirst
sentence in the fmuth**p~** ofsection 11.2.4 (lofth line from thebeginning ofthe section) ofANSl/ASHRAB Standard 103- 1988 is substitutedby "For

## oil Or gas JIO'WtIf furnaces and boilers tested with barometric dampersbut notmarketed 

### Itnd sold with attached barometric dampers. SIFshltll be 1.4". Tbesentence in thethird pan!8I'&pb of section 11.2.4 ofANSI/ASHRAE 

### Smulud 103-1988. ""Forgas fumaalS andboilen Dot raquiriDg draft relief: SlP=l"isJUbstitumJ by "'For dinJd exlMmst 

### 8l1li 8Zld oil fu.macas and boilen: SlF=l".

10.2 Tobie 'l. A 

## risbt dosilagbraceletis added attheend oftheequation delinill! L..ss inTable 7 of sec:tioIlU.U01 ANSJI ASHRAESbmdani 103-1988.

10.3 On-t:ydetime constant. The followiag calculationsprocedures supplem8lllt the procedures specified in section 11.2.9.4 ofANSJIASHRAE 

### StaDdard 103-1988: IfT**F.ON(h~T**F.sS. useTF.QN{tt)=T F.8S

- 0.2**IfTF.ONtf2}~TF.8s.** useTF.ONttz)=TF.ss-O.l**IfTF.ONttl~TF.oNftz).** use TF.ONttl)=TF,()N{l7}- 0.1 11M Off-cycJe time constant. The following calculation piucedures supplement the procedures specified in section 11.2.9.6 ofANSIIASHRAE Standard 103-1988:**IfTF.CJR'C4)~F.OFFCts).** use TF.<lf'Flt..}=TF.<JFFl:tsl+O.l**lfTF.<JFFl:t3)$TF.~tS),** use TF.OFFft3}=TF.omt,}-+O.2 IfTF.<lf'Fltl)$T**F.~4).** WI8**TF.~h)=TF.<JFFl:41+o'l**

For furnaces or boilers employing post purge with post purge period

### tv (see secoons 8.2 and 3.S oftbis appendix}. the time t). 4- and t5 are defined as: For furnaces;

### Federal Register 

### I Vol. 58, No. 161 

### I 

### Monday. August 23, 1993 

### I 

### Proposed Rules 

## 4455l

13=(tp+1.5) minutes t.=(1r+9.0) minutes 15=infinity. For boilers:

13=(1,.+3.75) minutes

t

...=(tp+22.5) minutes**t~=45** minutes wbere:

t,=ls as defiDed in 8.2 (furnaces) and 8.5

(boilers) ofthis appendix 10.5 Substitute the following for the definitions ofOt- in section 11 2.9.9 ofANSI! ASHRAE Standard 103-1988: [)p=off-qcle flue 888 draft factor equal to:

=1.0 for Wlits with atmospheric burners.

systems 1. 5. 9 (except direct vent and atmospheric burners with either electromechanical inlet dampers or 

### t1 ..Ie dampers). =0.4 or l)p for units with power bumers.

systems 2. 3. 4. 6. 8. 10. =1.0 or Dp for direct vent units with

atmospheric burners. system 9 (direct
vent only). =1.0 or Dp for atmospberic burners with eitherelectro-mechanical inlet dampers

or flue dampen. system 1. aud system 9 with units employing isolated combustion. =0.05 for units complying with section

7.4.3 ofthis appendix.
In the same aectioD (11.2.9.9). the definiti()fll for 

### Os<> for systems 4 aDd -8 is revised to read 88: Ds<>=0.85 or /(0.79+Op)/1.41 for syst"ms 4 and 8.
10.6.1 The definitions for 'I'F.o.x and 9l'.o.x in section 11.2.9.14 ofANSIIASHRAE Standard 103-1988 are revised to read as: IjIF.O.x=as defined in section 11.2.9.7 ofANSI! ASHRAE Standard 103-1988 9l-.o

.x=as defined in section 11.2.9.5 ofANSI! ASHRAE Standard 103-1988
10.6.2 The phrase "9--12" in the eighth line ofsection 11.2.9.16 ofANStlASHRAE Standard 103-1988 is deleted and the

Infiltration correction factor for slack. calculate the infiltration correction factor damper effectiveness. For systems**f..~.** or 8. 

### Do.. defined as:

where:

hj=dimensionless time increment given by

hJ=l/n. n=l00. number of segments betwPfln tl

toA=O to tltmr=1.0 IjIS."'=ljIs.OO,x as defined in section 11.2.9.9

ofANSIIASHRAE Standard 10.1-1988 Gl=1jI-s.oee"p(

- tltof·'F)='I'S.oeexp!**(to~'F1**

tOf-r)(tltOFf))**G2=(Gl+28)U)~1** (Gl+630)i19 G3=Gl+100**G4=(Gl+128)O~** I (Gl+630)119 IjIS.o=8S defined in section 11.2.9.17 of ANSI/ASHRAE Standard 103-1Q88 1jI•.ooJ=(Or)(IjIF.OO) I ((S/F)(DsJ)(Dsn)l for (S/F)

(DsJ)(Dso) >Or =If/F.OO for (S!F)(Ds'J}(Ds") SDF 1I'F.-=as defined in section 11.2.9.16 of

ANSIIASHRAE Standard 103-1986 GIJ=ljIs.oJeaxp{

- (toFF/toFF}(tltoA))**G2j=(Gll+28)O·~** I (Glj+630)'·9 G3,=Glj+l00**G4,=(Glj+128)O~** I (Glj + 630)119**1fI~.OJ=(Ot-)(.F.o)** I ((SIF}(OsJ)(Dso)j for (SI

F)(DsJI(Ds"1 >Or b<Jginnlng ofthe sentence is revised to read "For systems numbered 9--10:".

10.7 DeWminetbtt off-cycltJsfIJcJc [lOS draft

### fod«. Ds. The followiD8 caJculatiou procecIun'IIl are in place ofsection t 1.2.9.18 ofANSI!ASHRAE Staadard 103-1988:

Detennine the off-qcle stack 8u.draft factor. Os. defined as: Ds=t.O forsyslems 1 and 2.

=0.4 or Op for direct exhaust system with

power burners. system 3. =0.85 or ((t).7t+Op)/1.4J for system 4. 

### =00 for systems 5 and 6. =0.8500 or ({O.79+1)p)/1.4JDo for system 8. where:

l)p=as defined in sectioD 11.2.9.9ofANSII

ASHRAE Stand8l'd 103-1988. Do=stack damper effectiveness factor

defined as follows:
Stack dampereffectiveness factor. For systems 5. 6,or 8. calculate the stackdamper effectiveness factor. 

### Do. defiIled lIS:

='I'F.o for (S/F)(DsJ)CDso) 

### so., If/F.o=as defined In section 11.2.9.15 of

ANSIIASHRAE Standard 103-1988
Values of

### Ds,r during the summation:

DsJ=1.0 when O:S t < t, OsJ=Ds' when t, :S t < t., DSJ=DE when t., :S t S!oFF
where:**t=jhJto~r** and

## • 44556 

### Federal Register 

### I Vol. 58, No. 161 

### I Monday, August 23. 1993 

### I Proposed Rules

where:

t=(t

- t,)/(f.,

- t.) when 0 S; 

### i S; 1 t.=time when damper start to close f.,=time when damper finishing closing.

or=t.+t.J, when t.J=the duration ofclosing. DE=(AoIAs).[5I[5(AoIAsj2+2.6(1

- 

### Aof As)t.5sJ}lh
where:

As=cross-sectional area ofthe stack, in 2.

(see section 8.8.4 ofANSI/ASHRAE Standard 103-1988) Ao=net area ofthe damper plate. in 2. (see

section 8.8.4 ofANSI/ASHRAE Standard 103-1988) Ao=minimum opening (including leakage)

area ofthe damper when closed. =Ao,oCQSO+Ao,L, in 2 Ao.o=holes and cut-outs in damper plate as

defined in 7.6 ofthis appendix Ao.L=leakage area around damper shaft

and edges as defined in 7.6 of this appendix O=the angle the damper makes when

closed. with a plane perpendicular to the axis ofthe stack (see section 8.8.4 of ANSI/ASHRAE Standard 103-1988), radians 10.8 Off-cycle heat loss integration factors. The following paragraphs are modifications to sections 11.2.9.19 and 11.2.9.20 ofANSI!ASHRAE Standard 103- 1988:

For systems numbered 5-8:

For system number 3:

where:

Ts.ss=as defined in section 11.2.9.3 of

ANSI/ASHRAE Standard 103-1988 TF.ss=as defined in section 11.2.5 ofANSII

ASHRAE Standard 103-1988 530=as defined in section 11.2.10.3 of

ANSIIASHRAE Standard 103-1988 ToA=as defined in section 11.2.8.4 of

ANSI/ASHRAE Standard 103-1988 KI.ON=as defined in section 11.2.9.2 of

ANSIIASHRAE Standard 103-1988 Ds=as defined in section 10.7 of this

appendix 10.8.1 Off-cycle sensible heat loss integrationfactors. The following paragraphs supplement the calculation procedures specified in section 11.2.9.19 ofANSI! ASHRAE Standard 103-1988:

For systems numbered 2. 3. and 4 which employ post purge after the burner is shut off. determine off-cycle sensible heat loss integration factors. F3 and F4. from Figures 14 and 15 ofANSIIASHRAE Standard 103- 1988. respectively. using values of'l'F.o defined in 11.2.9.15 ofANSIIASHRAE Standard 103-1988. and a modified 

### RoFF defined as: RoFF=(loFF

- tp)/tOf-r where:

loFF=as defined in section 11.2.9.12 of

ANSIIASHRAE Standard (ANSII ASHRAE) 103-1988 lp=as defined in section 8.2 (furnaces) or

8.5 (boilers) ofthis appendix toFFas defined in section 11.2.9.6 of

ANSIIASHRAE Standard 103-1988 For system number 10 which employs post purge after the burner is shut off. determine off-cycle sensible heat loss integration factors. F5 and F6. from Figures 16 and 17 ofANSI/ASHRAE Standard 103-1988. respectively. using values of'PF,o defined in section 11.2.9.15 ofANSII ASHRAE Standard 103-1988. and the modified 

### RoFF defined above.

Do=as defined in section 10.7 ofthis

appendix DOI=as defined in section 10.7 ofthis

appendix 70=as defined in section 11.2.10.1 ofANSII

ASHRAE Standard 103.,.1988 TRA=as defined in section 11.2.5 of ANSII

ASHRAE Standard 103-1988 For system numbers 9 and 10:

KI.OIr=O 10.10 Off-cycle sensible heat loss. The following are revision and additions to the calculation procedures specified in section 10.8.2 Off-cycle infiltration heat Joss integrationfactors. The following paragraphs supplement the calculation procedures specified in section 11.2.9.20 ofANSI! ASHRAE Standard 103-1988:

For system numbered 2 and 4 which employ post purge after the burner is shut off. determine off-cycle infiltration heat loss integration factors, F7 and F8, from figures 18 and 19 ofANSIIASHRAE Standard 103- 1988, r6'spectively. using values of'l's.o defined in section 11.2.9.17 ofANSII ASHRAE Standard 103-1988, and a modified 

### RoFF defined in section 10.8 ofthis appendix.

For system number 3 which employs post purge after the burner is shut off, determine off-cycle infiltration heat loss integration factors. F7 and F8. from Figures 18 and 19 ofANSIIASHRAE Standard 103-1988, respectively. using values of'l'F,O defined in 11.2.9.15 of ANSIIASHRAE Standard 103- 1988. and a modified 

### RoFF defined in section 10.8 ofthis appendix.

10.9 Multiplication factor for infiltration loss during burner off-cycle. The following paragraphs are in place ofthe calculation procedure speCified in section 11.2.10.4 of ANSIIASHRAE Standard 103-1988:

Calculate a multiplication factor for infiltration loss during burner off-cycle KIoOf-r. defined as:

For systems numbered 1. 2 and 4:

11.2.10.6 of ANSI/ASHRAE Standard 103- 1988:

10.10.1 The definition for F6 in section 11.2.10.6 ofANSI/ASHRAE Standard 103- 1988 is revised to read as "and F6=as defined in section 11.2.9.19."

10.10.2 The following paragraphs are additions to the calculation procedures as specified in section 11.2.10.6 ofANSI! ASHRAE Standard 103-1988:

For furnaces or boilers employing post purge after the burner is shut off. calculate

### Federal Ilegister 

### I Vol. 58, No. 

### 161 

### I Monday, August 23, 1993 

### I 

### Proposed Rules 44557

the off-cycle sensible heat loss ofthe system. 

### Ls.()FP, expressed in percent and defined aa: LS.OFFLs.OWI + 

### Ls.OFP:I Where LS.Of'PI. the otf-q-cle sensible heat loss during the post

### purse period. is defined

as:



## LS•OFF1 

## = 

## 100· Cp

. 

## MF•ON

. tp

. 

## (T F•SS 

## +460)

.

# [l/(toN
. 

## QIN 

## .60)].

where:**~.oA'** 

### b'systems aumbored 2, 3 and 4 =(Cs')(Cr,ow) for syltem number 10 Cr.0Fr""8S defined 

### I.n II8CtioD 11.2.9.14of

ANSIIA..SHKAB se.ndard 103-1988 Cs'=asdefined inJ8dion 11.2.9.15 

### of

ANSIIASHRAB Standard 103-1988 and when**~.CA'2,** the oft'<ycIe sensible heat

10l1li afterthe post 

### purse period. Is defined as: Forsystemsnumbered 2, 3 and 4:

Ls,()PP2Z'(Ks.Of'P)t(ta>p

- tp)/toNt-HF3) +

("",..,.,)(F4" For syst.em number 10:

Ls.OI'I'2=(Ks.Of'P)((tow- tp)/foNt-UPS) +



### r.F.oc)(F6») where:

100=c0nversioa

### 6Ic:tor to express 8 decimal

as8 percent 

### CFaI defined 

### I.n section 11.2.9.1 ofANSII

ASH.IitAE Standard 103-1988 MF.ON"'rate offluegas mau flow during the

on period. as defined in section 11.S.1 of ANSIIASHRAB Standard 103-1988

and

LI,()

....

## "2. the off-cycle infiltration lwat loss

after the post purge period. is defined as: For system numbered 2 and 4:

L

•.OFP:F(K1.0A-)(70

- ToAlUtorF- tp)/ toN).[(F7)+(IjIs,oc)(F8)) For system number 3:

L •

.oA'l=O<:r.oFF ){70 - To.J(loFF

- 1,,)1 toNJ.[(F7)+(ljIF."")(F8)] where:

lOO=conversion factor to express a dec.i.mal

as a perrent G=as defined in section 11.2.9.1 ofANS!!

ASHRAE Standard 103-1988 M"ON=rate offlue gas mass flow during !hfl

on period. as defined in section 11.6.1 of ANSI/ASHRAE Standard 103-1988 tp=Iengtb ofpost purge time, as defined in sections 8.2 and 8.5 ofthis appendix TF,ss=as defined iD aection 11.2.5 

### ofANSII

ASH.RAE Standard 103-1988 <lsN=as defined in sectioD 11.2.8.1 ofANSII

ASHRAE Standard 103-1988 60=conversiOD factor, hourto minute 46O=couvers1on factor•.

### oF to OR TRA=as defined in section 11.2.5ofANSII

ASHRAE Standard 103-1988 TF.OFFl:tp)=otf-cycle flue 8U temperature at



### Ute end 

### ofpowerburnerpost purge period (see section 8.2 or3.5 

### ofthis appendix), OF F3. F4, F5 and F6=as defined in section

10.8.1 ofthis appendix for units with post purge. and in section 11.2.9.19 

### of ANSIIASHRAE Standard 103-1938 for units without post purge 10.11 Off-cycle infiltrotion hoot Joss. The following paragraphs are revisions and additions to the calculation procedures specified in section 11.2.10.8 ofANSII ASHRAR Standard 103-1988:

Ip::length ofpost purge time. as defined in

8.2 and 8.5 ofthis appendix TF.SS=aS defined in section 11.2.5 ofANSII

ASHRAE Standard 103-1988 46O=conversion factor, OP to 

### OR 70=assumed average indoor air

temJ1eratur6. as defined in section 11.2.10.1 ofANSlfASHRAE Standard 103-1988. Of ToA=national average outdoor air

temperature, as defined In section 11.2.8,4 ofANSIIASHRAE Standard 103-1988, OF TkA=as defined in soction 11.2.5 ofAl"lSII

ASHRAE Standard 103-1988**GrOF~-8S** defined in section 11.2.9.14 of ANSIIASHRAE Standard 103-1988 10.11.1 Theequation defining 

### K...ow and F7. F8 are revised toread as: K..Of'P'"as defined i.n section 10.9 ofthis appendix F7, F&=ae defined iB sectiOB 11.2.9.20

### of ANSIIASHRAE Staadatd t03-1988 for units without post purge 10.11.2 The 

### foUowiD8 

## JlIIrII8I1IPbs supplement the calculation prooedUlel specified in MCt10n 11.2.t0.8 ofANSII ASHRAE Standard 103-1988:

For furnaces or boile'l'll employing post
purge after the burner i8 shut off. calculate the off-q-cle inflltration heat 

### 10S11 ofthe system, LI,OFP, expressed in percent and defined as: L

••Of'P=Lt.OI'F1+LI.OFf'2
Where L1,0A-,. the otf-q'cle infiltration heal loss duringthe post purge period. 11 defined as. for IYstems uumbered 2. 3. aad4:

TF,<WF{tpl=off-q-cie Oue 

### 888 &empenrture at

theend ofpowerbumer post purge period (see section 8.2 or 8.5 ofthis appendix), OF F7 and F8=as defined in section 10.8.2 of

this appelldix for power

### burners with post purge <lJN=as defined in section 11.2.8.1 

### ofANSlI

ASHRAE Standard 103-1988 6fr--eonversion factor, hourto minute
For system number 10:

4.oA'1=0 LI.OFFl=O
10.12 Heating seasonal efficJencyand AWE. The following paragraph. supplement the calculation procedures as specified In sections 11.2.11 and 1L2 12 

### ofANSU ASHRAE Standard 103-1988:

### 44558 

### Federal Register / Vol. 58, No. 161 / Monday, August 23, 1993 / Proposed Rules

10.12.1 Heating seasonal efficiency. 10.12.1.1 For furnaces or boilers employing post purge after the burner is shut off. the definitions for LS.OFF and LI.OFF are replaced with the following in section 11.2.11 ofANSI/ASHRAE Standard 103- 1988: Ls.OI'Fas defined in section 10.10 ofthis appendix Ll.0f'F8s defined in section 10.11 ofthis appendix

. 10.12.1.2 The following supplements the definition for the listed value ofthe jacket loss factor C, in section 11.2.11 (and also referenced in section 11.3.11.3) ofANSI! ASHRAE Standard 103-1988: CJ=O.5 for finned tube boilers Intended to be installed in ICS applications 

### 10.12.2 Annual fuel utilization efficiency. The AFUE is as defined in sections 11.2.12 (non-condensing systems) and 11.3.12 (condensing systems) ofANSI/ASHRAE Standard 103-1988. except with the following revision to the definition for the term EffyHS in the defining equation for AFUE: EffyHs=heating seasonal efficiency as defined in sections 11.2.11 (non-condensing systems) and 11.3.11 (condensing systems) ofANSI!ASHRAE Standard 103-1988 and sections 10.12.1.1 and 10.12.1.2 ofthis appendix and is based

on the assumption that all weatherized

warm air furnaces orboilers are located out-of-doors; warm air furnaces which

are not weatherized are installed as ICS; and boilers which are not weatherized

are installed indoors. 

### 10.13 Heating seasonal efficiency. steadystate efficiency, andAFUE for noncondensingmodulatinggas or oilfurnaces and boilers. The following paragraph is in place ofthe requirements specified in section 11.4 ofANSI!ASHRAE Standard 103-1988:

Heating Seasonal Efficiency. Steady-State Efficiency. and AFUE for Non-Condensing Modulating Gas or Oil Furnaces and Boilers. Perform the following calculations to determine the steady-state and heating seasonal efficiency. Effyss and EffyHS. and AFUE. ofa 8.as or oil. furnace orboiler. noncondensing. and modulating. The calculations in sections 11.4.1 through 11.4.8.10 ofANSI/ASHRAE Standard 103- 1988 need to be completed at both the maximum and reduced input rates for both two stage and step-modulating controls. The calculations in section 11.4.9 and 11.4.10 of ANSIIASHRAE Standard 103-1988 need to be completed at the reduced input rate for units with step modulating controls. and at both maximum and reduced input rates for units with two stage controls. Use the calculation procedure specified in section 11.2 ofANSIIASHRAE Standard 103-1988 including the revisions to section 11.2 as specified in sections 10.1 to 10.12 ofthis appendix. and the modifications as specified in sections 11.4.1 through 11.4.12 ofANSI! ASHRAE Standard 103-1988.

10.13.1 The definition for EffySS.R in section 11.4.8.1.2 ofANSI!ASHRAE Standard 103-1988 is revised to read as "EffySS.R = as defined in section 11.4.7 ofANSI/ASHRAE Standard 103-1988." 

### 10.13.2 Balancepoint temperature. The following calculation procedure supplements the procedures specified in section 11.4.8.5 ofANSIfASHRAE Standard 103-1988: IfTe < O. use Te=O.



### 10.13.3 Average steady-state efficiency for the modulatingmode forfurnaces and boilers equipped with step-modulating controls. The following calculation procedures supplement the procedures specified in section 11.4.8.8 ofANSI! ASHRAE Standard 103-1988: IfQour.R > DHR. Effyss.M=Effyss.R



### 10.13:4 Average heat**o~tput** 

### ratefor the modulatingmode forfurnaces andboilers equipped with the step-modulating controls. The following calculation procedures supplement the procedures specified in section 11.4.8.10 ofANSI!ASHRAE Standard 103-1988: IfQour.R > DHR. QoUT.M=Qour.R



### 10.13.5 Average

### part load efficiency. The following supplements the definition for the listed value ofthe jacket loss factor C1 in sections 11.4.9.2.3. and 11.4.11.1 (and raferenced in section 11.4.11.2) ofANSI! ASHRAE Standard 103-1988: CJ=O.5 for finned tube boilers intended to be installed in Isolated Combustion System applications =1.0 

### fur finned tube boilers intended to be

installed outdoors 

### 10.13.6 Annual fuel utilization efficiency. The AFUE is as defined in section 11.4.12 of ANSI/ASHRAE Standard 103-1988. except with the following revision to the definition for the term EffyHS in the defining equation forAFUE: EffyHS=heating seasonal efficiency as defined in section 11.4.11 ofANSIIASHRAE Standard 103-1988 and sections 10.12.1.1 and 10.12.1.2 ofthis appendix and is based on the assumption that all weatherized warm air furnaces or boilers

are located out-of-doors; warm air furnaces which are not weatherized are installed as ICS; and boilers which are not weatherized are installed indoors. 

### 10.14 Heating Seasonal Efficiency, Steady-State Efficiency. andAFUE for CondensingModulating Gas or Oil Furnaces and Boilers. The following paragraph is in place ofthe requirements specified in section 11.5 ofANSIIASHRAE Standard 103-1988:

Heating Seasonal Efficiency. Steady-State Efficiency. and AFUE for CondenSing Modulating Gas or Oil Furnaces and Boilers. Perform the following calculations to determine the steady-state and heating seasonal efficiency. Effyss and EffyHS. and AFUE. ofa gas oroil. furnace orboiler. condenSing and modulating. The calculations in sections 11.5.1 through 11.5.8.10 need to be completed at both the maximum and raduced input rates for both two "tage and step-modulating controls. The calculations in sections 11.5.9 and 11.5.10 need to be completed at the reduced input rate for units with step modulating controls. and at both maximum and reduced input rates for units with two stage controls. use the calculation procedure specified in section 11.3 and 11.4 ofANSIIASHRAE Standard 103-1988 including the revisions to section 11.4 as specified in sections 10.13.1 to 10.13.4 ofthis appendix. and the modifications as specified in sections 11.5.1 through 11.5.12 ofANSI! ASHRAE Standard 103-1988.



### 10.14.1 Average

### part lood efficiency. The following supplements the definition for the listed value ofthe jacket loss factor Cl in section 11.5.11.1 [abd referenced in section 11.5.11.2} ofANSI!ASHRAE Standard 103- 1988: CJ=0.5 for finned tube boilers intended to be installed in Isolated Combustion System applications 

### 10.14.2 Annualfuel utilization efficiency. The AFUE is as defined in section 11.5.12 of ANSIIASHRAE Standard 103-1988. except with the following revision to the definition for the term EffyHS in the defining equation for AFUE: EffyHS=heating seasonal efficiency as defined in section 11.5.11 ofANSIIASHRAE Standard 103-1988 and sections 10.12.1.1 and 10.12.1.2 ofthis appendix and is based on the assumption that all weatherized warm air furnaces orboilers

are located out-of-doors; warm air furnaces which are not weatherized are installed as ICS. and boilers which are not weatherized are installed indoors. 

### 10.15 Optional trocergasprocedurefor determination of Dp

### forfurnaces orboilers employing a 

### powerburnerordirect vent. The following supplements thecalculation procedures specified in section 11.6.4 of ANSIfASHRAE Standard 103-1988:

Ifthe measured l)p above is less than 0.1. then use Dp=().05 as ifthere isnochance of flow through the unit during the off-cycle. as specified in section 8.8.3 ofthis appendix.

10.16 Tracer gas procedure for· determining the off-cycle loss factor**~** 

### for atmospheric furnaces orboilers with integral draft diverter or draft hood and equipped with an electro-mechanicel inlet damper or

an electro-mechanical flue damper that restricts the flow through the heat exchanger during the off-cycle. Calculate the off-cycle loss factor.**~.** defined as the ratio ofthe offcycle sensible heat loss with the electromechanical damper closed during the offcycle to the off-cycle sensible heat loss with the electro-mechanical damperheld open during the off-cycle:**~=(Os.OFF** with damper closed) I (Os.OFF with damper open) where:

=one minute sum-total ofthe measured

qS.OFF • .1.t (.1.t=time-step in seconds when data are recorded) over a one minute interval starting at five minutes into the cool-down period 6. t=time interval between measurement as

defined in 8.9.5 ofthis appendix. seconds 1/6O=unit conversion factor to convert time

in second to minute qs.QFF=Cp. mS.OFF· (Ts.OFF-TRAl where:

### Federal Register / 

### Vol. 58, No. 161 / Monday, August 23, 1993 / Proposed Rules 44559

qs.OFFoff-cycle sensible 108s rate. Btulmin c.=specific heat capacity ohir. as defined

in section 11.2.9.1 ofANSUASHRAE Standard 103-1988. Btullb. of Ts.OFFmeasured stack temperature at time

t as defined in section 8.9.5 ofthis appendix, OF TRA=room temperature as defined in

section 11.2.5 ofANSUASHRAE Standard 103-1988. OF mS.OFFUCrm

- Cr)/(CT

- CTB)) • PI' • VT where:

mS.OFFmass flow rate at time t ofthe stack

gas during the off-cycle. Iblmin Crm=concantration by volume of

measurable tracergas in a certified standard tracer gas mixture. percent Cr=concentration byvolume oftracer gas

present in the stack gas sample. measured at time t+tDELAY. in accordance with section 8.9.5 oftbis appendix. percent tDELAy=tracar gas sample delay time as

defined in section 8.9.4 ofthis appendix. seconds CTB=room background concentration by

volume ofthe racer gas used as defined in section 8.9.2 ofthis appendix. percent**V~f\ow** rate oftracer gas into the stack measured in accordance with section 8.9.3 ofthis appendix, ft 3/min PF=density ofgas as defined in section

11.6.2 ofANSII ASHRAE Standard 103- 1988.lb/ft] 10.17 Optionalprocedurefor determining off-cycle draftfactorsforfurnaces orboilers employing a powerburneror direct vent. The following are revisions to sections 11.7.1 and 11.7.2 ofANSI!ASHRAE Standard 103-1988:

10.17.1 Add the word "fector." to the first
sentence in section 11.7.1 ofANSI/ASHRAE Standard 103-1988 so that the beginning of the sentence read:

Calculate the off-cycle draft factor for flue
gas flow.!)P, defined as:

10.17.2 The equation for 

### Os for system number 8 in section 11.7.2 ofANSI/ASHRAE Standard 103-1988. 0s=(00) (Op). is replaced with 0s=[(0.79 +Op)/l.4J (00).

10.18 Procedure for determining off-cycle draft factors for atmospheric furnaces or boilers with integral draft dlverter or draft hood and equipped with either an electromechanical inlet damper or an electromechanical flue damper that restricts the flow through the heat exchanger in the offcycle.

For atmospheric furnaces with an integral draft diverter or draft hood and equipped with either an electro-mechanical inlet damper or an electro-mechanical flue damper. and installed as an indoor system or

an ICS. the System Number and the draft factor Dp are defined as: System Number=l for indoor system =9 for ICS system and

Dp=KL where:**~=off-cycle** loss factor. as defined in section 10.16 ofthis appendix. 10.19 NationalAverage Burner Operating Hours. AverageAnnualFuel Energy Consumption andAverageAnnualAuxiliary Electrical Energy Consumptionfor Gas or Oil Furnaces and Boilers. The following sections 10.19.1 thru 10.19.3 are in place ofsections 1 thru 3 ofAppendix C ofANSI!ASHRAE Standard 103-1988:

10.19.1 National average numberof burner operating hours.

For furnaces and boilers equipped with single stage controls. the nation81 average number ofburneroperating hours is defined

as: BOHss=2080(0.77)(A)(DHR)

- 2080(8) where:

208O=national average heating load hours O.77=adjustment factor to adjustthe

calculated design heating requirement and heating load hours to the actual heating load experienced by the heating system DHR=typical design heatingrequirements

as listed in Table 8 (in unit ofkBtulh) ofANSIIASHRAE Standard 103-1988, using the propervalue ofQoo,. defined in Section 11.2.8.1 ofANSI/ASHRAE Standard 103-1988 A=1000001(341300(ypePE + Yla-PEIG +

y.BE)+(o,N

- o,.)eEffyHS1 B=2Qp(EffyHS)(A)/100000 l()()()(}():factor that aa:ounts for percent

and kBtu PE=bumer electrical input rate at full-load

steady-state operation yp=ratio ofinduced or forced draft blower

on-time to average burneron-time. as follows: 1 for units without post purge 1+(tP/3.87) for single stage furnaces with

post purge 1+(tP/I0) for twa-stage and step modulating

furnaces with post purge 1+(tP/9.68) for single stage boilers with

post purge 1+(tP/15) for two stage and step modulating

boilers with post purge**PE~total** electrical power toburner equipped with intermittent or interrupted Ignition device when the device is on. as defined in Section 8.1.1 ofthis appendix PEIG=PET- PE. electrical input rate to the

intermittent or interrupted ignition device on burner (ifemployed) YIG=ratio ofburner intermittent or

interrupted Ignition device on time to average burneron-time, as follows: =0 for burners not equipped with lID =(t1G/3.87) for single stage furnaceS =(t!d10) for twa-stage and step modulatingfurnaces =(t!d9.68) for single stage boilers =(tlo/15) for two stage and step modulatingboilers tlo=on-time ofthe burner intermittent or

interrupted ignition device. as defined in Section 8.1.1 ofthis appendix tp=post purge time as defined in Sections

8.2 and 8.5 ofthis appendix y=ratio ofblower or pump on-time to

average burner on-time. as follows: 1. for furnaces without fan delay 1. for boilers without a pump delay 1+(t + - t- )/3.87. for single stage furnaces

with fan delay 1+(t + - t - )/10. for two-stage and step

modulating furnaces with fan delay 1+(t+19.68). for single stage boilers with

pump delay 1+(t+115). for two stage and step modulatingboilers with pump delay BE=circulating air fan orwater pump

electrical energy input rate at full load steady-state operation Qu.aas defined in section 11.2.8.1 ofANSU

ASHRAE Standard 103-1988 Qp=as defined in section 11.2.11 ofANSl/

ASHRAE Standard 103-1988 EffyHS=as defined in section 11.2.11 or

11.3.11.3 ofANSI!ASHRAE Standard 103-1988 and section 10.12.2 ofthis appendix. percent, and calculated on the basis of: =indoor installation. for non-weatherized boilers =ICS installation. for non-weatherized

warm air furnaces =outdoor installation, for furnaces and boilers that are weatherized 2=ratio ofthe average length ofthe heating

season in hours to the average heating load hours
t+=as defined in sections 9.5.1.2 and

9.5.2.1 ofANStlASHRAE Standard 103- 1988
t-=as defined in section 9.6.1 ofANSU

ASHRAE Standard 103-1988
For furnaces and boilers equipped with
two stage or step modulating controls the
average annual energy used during the heating season. EM. is defined as: EM=(Qn

- o,.)(BOHss)+(8760

- 4600)(0,.) where:

o,N=as defined in section 11.4.8.1.1 of

ANSI/ASHRAE Standard 103-1988 Qp=as defined in section 11.4.12 ofANSI!

ASHRAE Standard 103-1988 BOHss=as defined above. in which the

weighted EffyHS as defined in section 11.4.11.3 or 11.5.11.3 ofANSIIASHRAE Standard 103-1988 and section 10.13.6

or 10.14.2 ofthis appendix is used for calculating the values ofA and B, the
term DHR is based on the propervalue ofQoo-r defined in section 11.4.8.1.1 of ANSIIASHRAE Standard 103-1988. and the term (YpPE+YIGPEIG+yBE) In the factor A is Increased by the factor R. which is defined as: R=2.3 for two stage controls

=2.3 for step modulating controls.when the ratio ofminimum-ta-maximum output is greater than orequal to 0.5 =3.0 for step modulating controls when the ratio ofminimum-ta-maximum output is less than 0.5 A=1000001

(341300(ypPE+YloPEIG+yBE)(R)+(CllN o,.)(EffyHSlJ EffyHS=as defined in section 11.4.11.3 or

11.5.11.3 ofANSI/ASHRAE Standard 103-1988, and calculated on the basis of: =indoorinstallation. for non-weatherized boilers =ICS installation, for non-weatherized

warm air furnaces =outdoor installation. for furnaces and boilers that are weatherized 876O=total number ofhours per year 4600=as defined in section 11.4.12 of

ANSIIASHRAE Standard 103-1988
For furnaces and boilers equipped with
two stage or step modulating controls the national average number ofburner operating

### Federal 

### .Register / Vol. 53, 

### No. 161 

### I Monday. August**23~** 

### 1993 

### I 

### Proposed Rules

hours atthe redured operating mode is defined as:

BOliR=XREM/o.. N • R where:

'Xa=6S aefinoo in**~tWn** It.4.&.7 ofANSI!

ASHRAE StBruiard 103-1988 EM=as defiued aOOV8 o..:<.R=as defiaed in section ltA

..8.1.2of ANSlIASHRAE Staadard t03-19M. For fnmaces 

### and boilers equipped with
two stage con:trols the;national average nwnberofbw:neroper.atiDga-rs at the maximum operating mode (BOHH ) is defined

as: BOHH=XHEM/QN
where:

)4.=as'defined insection 11.4.8.6 ofANSII

ASHRAE Standard 103-1988 EM.=as. defined above QjN=asdefnredinsection 11.4.6.1.1 of

ANSf./ASHRAE Standard 1{)3-1986
For fumares and.boiUu's etPpped with step mCid'u1ating controls.the national average numher ofburner operating hours at the modulating operating.mode (BOHM ) is defined as: BOHr.t=N.Ew'CbN.M whellil:

XH=as Sefiusdinsedion 11-4.8.6 ofANSII

ASHRARStandard 103-1988

EM=8S defined above QjN.M=Qrnrr.M/(Effyss.M/1OO) QoUT.M=a5 defined in section 11.4.8.10of

ANSIIASHRAE StandM"d 19J.49831Uld sectitm 18.13.4efth!S appendix Effyss.M=8S defined'in _tion 11.4.8.8of

ANSIIASHRAE Stanearo· W3-1!J86.and sediOft 1:6:13.3 ofthisappendix. percent l00=fadort!h6t ac::ceuRts tor pet'CfJDt 1'0.19.2' Average aIlTl1IDf fuel energy for
gas or ait 

### foelert fimracef{ or boiler:r. For fur:naces orboiliers equipped witil singf-e stagecont'I:ol's'the averageann't1ld fuel
energy consumptwn

### l'EFl i5 expressed in Btu
per yeanmd defint!d ItS: EF=BOHssl<lH

- Qp)+876U(Qp)
where:

BOHss=a5 defined in section 10.19.1 ofthis

appendix**~s.deined** iJl:section 11.2..8.1 ofANSI/ ASHRAE Standard 103-1.96B Qp=a& Ii.lined in section 11.2..11 ofANSII

ASHRAE 

### StaP.derd lQj.::.l98a 876o.=as.d&fine<lin section 10-.19.1 ofthis

appendix
For furnaces or boilers equippedwith eithe!.' twe 

### stage 01' stet>modtttating.controls EF is defined as: EF=EM+46OO(Qp)
where:

EM=as defined in section 10.19.1 ofthis

appendix' 46()();:as defined in section 11.4.12 of

ANS11ASHRAEStandard 103-t98'8 Qp=at! defined in section 11.2;n ofANSI! ASHlltAE Standard 163-1933 10.14.3 AvemgeallltlUl1_iJimy electrical energy consumpl!iefJ

### fior fIlS fJroiJ fueledfimtacetJ 01" boiHm;. f6F furnaces or boilers equipped with shtgle**~ ~s**  the average-lm'llUal' IHUIDary efet'.:tricat consnmptiOl'l 

### (E'"d is ""fIFeSsed iD kilowatthours and I'Iefineft as: EAE=BOHss(ypPE+y,oPE,o+yBE) where:

BOHss=as defined in section 10.19.1 afthis

appendix PE=as MfirHld insecti_**~**1.2'.:1 01ANSII

AS?IRA:fi Slastdard**~t!J8&** ..**yp=as~**

## msedie&**lQl~.l ort~**  append'f!It
y,o=as defined in section 10.19.1 afthu

appendix PEro=m! defined' il't sec1io@m lO.l!J.l gfdRs

appemfut
)"=1IS t'WiRed! insecti01'l lO.l9-.1 ofl'his.

appendiox BE=as defined in sectieD It.l.2.2 01 ANSI!**ASHRA~Stan6an:t** 1IO:J-IHB
For furnaces or

### boit'ers lIiJIlipped with two stage controls EA!; i'sdefinedas; EAE=BOHR(YPI'ER + YIGI'EIG + yBEiJ. +**~.yPP&l** + yJEK;

... yJilEj,J where:

1ilOHa.=as.defiuedinsecti<ta 111.19..1**~** this

appeooUi
yp=as defined in section 10.19.1 ofthis

appendix 

### PEg=as.EkafHWfi ill sectien 9.1;2.2 

### illiG

measured at the reduced fuel i.up1&t rate. ofANSII ASHRAE.Standald li)3-1I9i8 YIG=as defined in sectWn 10.19.1 gfthis

appeRQi.x: PE,o=6s defined in section 10.19..1 ofthis

apperu.lj"

. y=as defined in sectionlQ..19.1 

### ofthis.

appeod.i.x BER=as definee;i illSlid.iDu.9..1.L2 aDd.



### measw:ed. at the· reduaIdfuliAputJ:ate. of**ANSUASHR.AE.~** 103-1988 BOHH=as defined in sedio.a 10.19.1 oCthis**~** PEH=a& defined ill sectioa9.1.2.2lWd

measured at the IBa!XiIm.un fuel input rate, ofANSllASHRAEStaailard 103- 19B& BEu=as defiseli in sectiou. 9..l..2.2. and

measuredat tbe JDaximum fuel inpI.lt rate.ofANSUASHRAE SJiam.d.aId 103- 1988

For furnaces or boilnsequippedwitt! step modulating t:0RblDIs**~** isdlefiueG as; EAE=BOHR(ypPER + y,oPElCO +**yB~J** + BOlia(ypPEw + 

### yKiP&G -+ yBEw).
where:

BOHR=as 

### defiaed InsectiolllQ.1'!.1 ofthis

appendix
vp=as defined in sediao. 10.19.1 of

### th.is

- appendix 

### i'ER=as defined IIihow

Yi6=llS

### de&ed in sectiOR: t{U9..1ofthis**8'l'PfI'Il~** PE1G=as defined 

## m section 19.19.1 oftftis appendix
y=as defined in section 1'0.19-.1 oftftis

appendix BER=as defined'above BOHM=as definedin section 1n.t9.1 ofthis



### awendix
PEH=as defined above BEw=as defilled above
10.20 Av.eR/8fHInD.W1l 

### eJedric- energy consumptioo

### fee eIecI.&iI;:**~** grbQjJers. For elect:cie:fwa&alS aad

### 00WeES: IiIw average annual eDel'8Y**QIP8!~ ~**  iIS expressed in 

### kiJewatt...hours ImIi liefined 

### as: EE=100(2080no.77)(DHR) f 3.4U(AFtJE)
where:

100=10 express a percent as a 

### decinlaf 2080=85 defined in section 10.19.1 oftbis

appendix O.77=as defined in section to.19'.1 ofthis

appendix DHR=86 defined in section 10.19.1 ofthis

appendix

. 3.413=conversion to express energy in

terms ofwatt·homJs instead 

### ofBtu AFUE=6sdefi.aed iasec1ion 11.1 of ANSI! ASHRAE Stlmdard 103-1988.percent HUl

## Ener&Y Factor. 10.21.1 Energy factorfor gQ6 «oil. furnaces 

### ud beilBrs. The ell8l&Y.factorjor
gasoroil furnace& aali Boilers. iIS 

### 4Ie:.ined as theratiQ.ofthftsum ofthe u.sefu.l annual 

### fosSil fueleD/ill&Y delivered to the. building space asbeat

### adthe auxiliary electrical
energy that is

### NCfMlreci asusable-heat. to the

sum oftile 

### ......tfoasil fuel eaergy

COIl8Uf114l&a

### edthe eD8I&Y 

### Deeded at

### tIw
power plant to generate the awdlillEY electr:ic.a 8IleIIY CIOIISumeci 

### t.y aile appliGce. The above definition of

# e....,. IBct.vr isbased
upon the tIemJ III8I..t.

### as. _BIIIIefficieftcy eJleq.)ffactor 

### uddefined

..equQQa (1} in 

### appmdix B 

### ofANSllASlfW\BStamlard 193- 1988. using the IIIII1IIBg4t ta.BeroperIIIti..DIJ OOUl'S.**~** ......liIIelenergy 

### fur gas or oil fueled 

### fIInlams orIIoiIms

### &1. II'IfI!II'lIge annwd

## auxim.y eIecIdcal8MI&'J**con~** forPIlat:oil 

### faded fuma£es 

### or boilers {E

...

### td. asdIefineU insedioBs 1tUlt. 10.19.1. 1O.tlU, and sectioaIfU9.3. respectively, ofdUs appeadioc.. 

### ThefDllIDwing paragraphs specify the procedure for the. cakufMioll 

### erEP a.j• ill

### place ofAppeadix B ofANSlfASHRAES't!ancIud lfB-198&,.d include II;**co~** ofa syntax errer contained in equatioft

### fllofappendix B of ANSlI J\SRIVdi**StMtdtrrtI1f&.l~.** Tile
energyfactorwhiclt

### incorporates.

## russR fuels and electrical energy as described

## m section 10.19 ofthis

## ItPfM'llKlix. isclem-!

### as. iu. percent:



### EF 

## AFUE/1OO+3413y BEBOH 100 

## EF= X 

## EF 

## +3413FEAE

### Federal Register 

### I Vol. 58, No. 161 I Monday, August 23, 1993 I Proposed Rules 

### 44561

where:

l00=factor that accounts for percent Er=average annual fuel consumption as

defined in 10.19.2 ofthis appendix. EAE=88 defined in section 10.19.3 ofthis

appendix. AFUE=AFUE as defined in sections

11.2.12,11.3.12,11.4.12 and 11.5.12 of ANSIIASHRAE Standard 103-1988, percent, and calculated on the basis of: =indoor installation, for non-weatherized boilers =ICS installation, for non-weatherized

warm air furnaces =outdoor Installation, for furnaces and boilers that are weatherized y=88 defined 10.19.1 ofthis appendix BEBOH=(BE)(BOHss) for units with single

stage controls =(BERl(BOHRl 

### + (BBH)(BOHttl for units with two stage controls =(BE.)(BOHRl 

### + (BEttl(BOHM ) for units with step modulating controls BOHss=as defined in section 10.19.1 ofthis

appendix BOHR=as defined in section 10.19.1 ofthis

appendix BOHH=as defined in section 10.19.1 ofthis

appendix BOHM=88 defined in section 10.19.1 ofthis

appendix BE=8S defined in section 10.19.1 ofthis

appendix BE.=as defined in section 10.19.1 oftbis

appendix BEH=as defined in section 10.19.1 orthis

appendix F=ratio ofthe energy consumed at the

source ofelectrical generation to the electrical energy delivered at the furnace

orboiler,=3.37 3413=eonversion factor from kilowatt to

Btu/h 10.21.2 Energyfactorfor electricfurnaces andboilers. The energy factor for electric furnaces and boilers is defined as: EF=AFUE where:

AFUE=AFUE as defined in section 11.1 of

ANSIIASHRAE Standard 103-1988, percent, and calculated on the basis of: =indoor installation, for nonweatherized

boilers =ICS installation; for non-weatherized

warm air furnaces =outdoor installation, for furnaces and

boilers that are weatherized 10.22 Average Annual Energy Consumption for Furnaces and Boilers Located in a Different Geographic Region of the United States and in Buildings with Different Design Heating Requirements.

10.22.1 The following legend is added to Fig. G-1 ofANSIIASHRAE Standard 103- 1988: Alaska-3500 HLH Hawaii and Territories--O HLH

10.22.2 Average annualfuel energy consumptionforgas or oilfueledfurnaces and boilers located in a different geographic region ofthe United States and in buildings with different design heating requirements. For gas or oil fueled furnaces and boilers the average annual fuel energy consumption for

a specific geographic region and a specific typical design heating requirement (EFR) is exprassed in Btu peryear and defined as: EFR=((EF-8760 0,.) HLH 12080)+8760 0,. where:

EF=8S defined in section 10.19.2 ofthis

appendix 876O=&s defined in section 10.19.1 ofthis

appendix

. Qpc:as defined in section 11.2.11 ofANSI!

ASHRAE Standard 103-1988 HLH=heating load hours for a specific

geographic region determined from the heating load hour map in Figure G-l of ANSIIASHRAE Standard 103-1988 and in section 10.22.1 ofthis appendix 2080=as defined in section 10.19.1 ofthis

appendix 10.22.3 Average annual auxiliary electrical energyconsumptionfor gas or oil fueledfurnaces andboilers located in a different geographic region of the United States and in buildings with different design heating requirements. For gas oroil fueled furnaces and boilers the average annual auxiliary electrical energy consumption for a specific geographic region and a specific typical design heating requirement (EAER) is exprassed in kilowatt-hours and defined as: EAER=EAEHLH 12080 where:

E

AE=8s defined in section 10.19.3 oftbis appendix HLH=as defined in section 10.22.2 ofthis

appendix 2080=as defined in section 10.19.1 ofthis

appendix 10.22.4 Average annual electric energy consumptionfor electricfurnaces andboilers located in a different geographic region of the United States and in buildings with different design heating requirements. For electric furnaces and boilers the average annual electric energy consumption for a specific geographic region and a specific typical design heating requirement (EERlls expressed in kilowatt-hours and defined as: EER=100(0.77)(DHR)(HLH)/3.413 AFUE where:

100 = as defined in section 10.20 ofthis

appendix 0.77 

## = as defined in section 10.19.1 ofthis appendix DHR

## =as defined in section 10.19.1 ofthis

appendix ' HLH = as defined in section 10.22.2 ofthis

appendix 3.413 = as defined in section 10.20 ofthis

appendix AFUE = as defined in section 11.1 ofANSII

ASHRAE Standard 103-1988, percent 10.23 AnnualEfficiencyfor Gas or Oil Furnaces and Boilers other than Mobile Home Furnaces. The Annual EffiCiency is defined as the ratio ofthe sum ofthe useful annual fossil fuel energy delivered to the building space as heat and the auxiliary electrical energy that is recovered as usable heat, to the sum ofthe annual fossil fuel energy consumption and the energy needed
at the power plant to generate the auxiliary electrical energy consumed by the appliance. (The equation defining Annual Efficiency Is in section 10.23.4 ofthis appendix.) The above definition ofAnnual EffiCiency is based upon the term named as seasonal efficiency, energy factor, and defined as equation (1) in appendix B ofANSI/ASHRAE Standard 103-1988, using the average burner operating hours, average annual fuel energy for gas oroil fueled furnaces orboilers (EF), average annual auxiliary electrical energy consumption for gas or oil fueled furnaces or boilers (EAE), as defined in Appendix C of ANSI/ASHRAE Standard 103-1988. The definition ofAnnual Efficiency is comparable
to the energy factor defined in section 10.21 ofthis appendix, with the exception that for non-weatherized furnaces, Annual EffiCiency is calculated on the basis ofindoor installation. The following paragraphs specify the procedure for the calculation of Annual EffiCiency and are in place of appendix B and appendix C ofANSI! ASHRAE Standard 103-1988, and include a correction ofa syntax error contained in equation (1) ofappendix B ofANSIIASHRAE Standard 103-1988.

10.23.1 National average numberof burneroperating hours. Same as in section 10.19.1 ofthis appendix except the term EffyHS used in the calculations for the burner operating hours is defined as: •

For furnaces and boilers equipped with single stage control: EffyHs=as defined in section 11.2.11 or 11.3.11.3 ofANSIIASHRAE Standard 103-1988, percent, and calculated on the basis of: =indoor installation, for non-weatherized units with system number 1, 2, 3, 4, 5, 6, or 8 that use Indoor combustion air, and for direct vent units with system number 9 or 10 =outdoor installation, for units with system number 9 or 10 that are weatherized
For furnaces and boilers equipped with two stage or step modulating controls: EffyHS=as defined in section 11.4.11.3 or 11.5.11.3 ofANSI/ASHRAE Standard 103-1988, percent, and calculated on the basis of:

= indoor installation, for non-weatherized units with system number 1,2,3,4.5, 6, or 8 that use indoor combustion air, and for direct vent anits with system number 9 or 10

= outdoor installation, for units with system number 9 or 10 that are weatherized 10.23.2 Average annualfuel energyfor
gas or oil fuelodfurnaces or boilers. Same as in section 10.19.2 ofthis appendix except that the burner operating hours Is computed

as defined In section 10.23.1 ofthis appendix.

10.23.3 Average annual auxiliary electrical energy consumptionforgas or oil fueledfurnaces or boilers. Same as in section 10.19.3 ofthis appendix except that the burner operating hours is calculated as defined·in section 10.23.1 ofthis appendix.

10.23.4 An Annual Efficiency which incorporates fossil fuels and electrical energy
as described In sections 10.23.2 and 10.23.3 of this appendix, is defined as, in percent:

## 44562 Federal 

### R.egister I Vol. 58, No. 

### 161 

### I Monday, AugU6t 23., 

### 1993 

### I 

### Proposed 

## RuMs



## AE= 

## EF AFUE*Il00+3413yBEBOH xlOO
EF 

# +3413 F EA.E.

where:

100=6ictor that accmmts for pettent &=average annualfuel consumption as

defined in section 10.23.2 ofthis appendix. EAE=$defined illsection 10.23.3 ofthis

appendIx. AFUE.'*=AFUE as defiDed in sections

11'z.1Z, 11.3.12. 11.4.12 and in section 11.5.12 ofANSI! ASHRAE Standard 103- 1988. percent. andcalculatedon the basis of: 

### =i.n.doorinstallation. fur non-weatherized units with Sfstem number 1. 2.3. 4. 5. 6. or 8 tlwt use l.ndeor combuatiQn air, and fur direct vutunits with systam number Qor 10 =outdoor installation, fur units with system number 9 or 10 that are weatherized
y=asdefined insection 10.19.1 ofthis

appendix iEBOH=(BB)(BtlIi.l for units with single

stage controls =(BEa)(BOHRl

... (BBW.(BOHaU for units with two stage controls. =(BERl{BQHRJ

... (BEu)(BOHwl for units 

### withstep modulating controls 

### BOH.ss=as defined. in section 1Q.23.1 ofthis

appendix BOHa=as defined in section 19.23.1 ofthis

appendix 

### BOHtr=aa EIafilaed iD. section 10.23.1 ofthis

aptMmdix BOH.t=88 detin8d iB section 10.23.1 ofthis appendix Bi=asdef:iaed in sectian 11'1.HU ofthis

appendix

OOIl=8S defined in sectioD 10.19.1 oHMs

appendix BEfFIIS defu:led ill section 10.19.1 afthis

appendix F=as dBfined in section 19.21.1 ofthis

appendix. 3413=COllwrsiOll factor from kilowatt tD

Btn/b
10.24 Annual efficiency for elflCll'k furnaces 

### ami boiJ.ers; The A.amIal Efficincy for elactric: 

### _maces.and boi1en ill defiDecl

### as: AE=AFUE'" where:

ARJE*=AFUE as de.fmed in section 11.1 of

ANSl/ ASli'RAE Standanl103-1988. percent. awl 

### alcula.tad 011 the basis of: :indoorinstallation. 

### for DElIl-waatheci%ed

warm air furnaaIs and· bollers 

### =out.IikJor instail4Won. for famaces and boilers that are weatheri.z.ed.
10.25 Annual efficiency for mobile home furnaces. Ta&Annual Efficiency for mobile home furnaces. is defined as the tatio ofthe

sum ofth.& useful amwalfussil tuelenergy delivered to the building space as heat and. the auxiliaryelectrical energy thet is recovered as usable heat. to the sumofthe annual fossil fuel. eIlergy consumption and the anergy needed afthe power prantto generate tke auxiliaryelectricel energy consumed by**~**appliaac& 

### TAO. abI:Jve defiBitio& ofA1mueJ Biiic:ieoc1 isthesame
as the JmmIld Eftid.eaq 

### cleArwd Gad calculated inS8CI'ikln w.2'3 ElfIbis appendrilx, excepf thatAnnual Eftic::iency 

### fatmobile home furnaces is limited to those systems specificaUy**~** falo l8'lIIiik!:a-and

are installed indoors and: UIMt GRlidi8

# air.

combustioo.

10.25.1**Natiolwl~lRSIffberof** purner opeMfiDgliaun

### fWRIOb.i.lllthamlJ fu17KlCflS. 

## same as in

### sec:u- UU9.1 ofthis appendix. except that the vaha OfBffJRS ill the calcullltioa oftIla tiumer opu:atingboars is calculated on the Dalia IIIfa. directvUDhmit witll 

### S¥Stem**~** 

### oc 18

### and imtal1ed indoors.

10.25.2 AtlemgeCl.1NDRal**fu.et~** 

### for mobilehomefurnaces. Same as ia.SBCtion 1IJ.23..2 oftbiuppeud.ixexcepttilat

### tJw. burneroperating hours is calculatedas specified in: sectioll 1(U5..1crf dais appeDd1:x.

10.25.3 Average annual auxiliary' ehectricalenergycoasunrptSc.fa6 IDDbUe homefurnaces. Same as in section 10.23.3of this apperuiiix _ptthattbitbUl'll« operating hours is calculated al! specified in section 10.%5.1 ofthis appeadix.

10.25.4 Annual efficiency for

### mt:JIiJil6 hol1Rtfurnaces. The ADlHulii Eifu:ieacy for mobile home furnaces. which incmpomtBs fossil fuels andelec:trical 6Il8I8Y aa described in section lQ.25 ofthis appendix.is defined
as, in percent: where:



## AE = 

## EF AFUE*'lOO+3413 

## Y' BEBOH xl00 

## EF 

## +3413F EAE

100=factor that accounts for percent 

### EF=8l!8f1188 annual fuel cnnsumption as

defined in sectioll1D.25.2 ofthis appeBdix.

EAE=&IiI defined. illsectio1110'25.3 

### ofthis

appendix. AFUE*=AFVE aa defined iI1 sectiOI1S

11.2..12-, 11.3.

## n. 11.4.12 and 11.5.12 (ilf ANSII.AS.HRAE Standard 1Q3-1968. parcant. andcalctrlated on tb8 basis ofa directvent unit with system nwnber 9 or 10 andinstalled indoors
y=as defined in section 10.19.1 ofthis

appendix BEBOH=(BE)(BOHss) far units with single

st.E:QIrtrQIs**=(~(BOHRJ+{BEH){BOHH)** for units with
twa stage-controls**=(BER)('BO'tfR)+(BEH)~** f6l' units with step modulatingcontrols BOHss=a8 defined in section 10.24.1 ofthis

appendix BOHR=as defined in section**10~24.1** ofthis

appendix BOHH=as defined in section 10.24.1 ofthis

appendix BOH",=as defined in section ltl.24.1**ofthi~** appendix BE=as defined in section 10.19'.1 ofthis



### appeadix BER=as defined in section 10.19.1 ofthis

appendix BEH=as defined in section 10.19.1 oftkill

appendix F=as defined in section 10.21.1 ofthis

appendix 3413=conversion factor from kilowatt to

Btu/h 10,26 Calculation 

### of sales weighted
average wllmal eJlergy consumptionfor mobile home furnaces. In order to reflect the distribution ofmooiJe banes tg geographical regiol1S with average 

### HLHwHF value diffamnt from 2080. adjust the 8Ilnual 

### fessi.l fuellllld auxiliary electrical energy consumption values for mobile home rumftCtIS using the following adjustment calculations.

10.26,1 For mobile home furnaces the sales weighted average annual fossil fuel energy CORSumptiOD is. 

### axptreseed in Btu per year

### aDEi defined as:**EF.~I"** - 87fiO 

### Qrl HLH_I 2080

... 8760Qp
where:

EF=as defiaed ill section 10.25.2 ofthis

appendix 8760=as defined iB sectiQn 10.19.1 ofthis

appendix Q,.=as defined· in section 11.2.11 ofANSl/

ASHRAE StandarQ 103-1988 HLHMHF11t60. sales

## weiabted avenp

heatiagload bl!1ura flilrnmbiJehome

fu:rnefi:t!S 2080=a8 defined in section 10.19.1 ofthis

appendix
10.26.2 For nmhile home furnaces tM sales weishted

### awrap annualauxiliary electrical tmll1'8Y conswnptionis expressed in kilowlitt-holirs and defined' u:
EAE.MHFlE'AE) (HU4!HFll 2080 where:

EAE=as defined in section 10.25.3 ofthis

appendix

### Federal Register 

## I Vol. 58, No. 161/ Monday, August 23. 1993 

## I Proposed 

### Rules 44563

HLHMm=as defined in section 10.2S.1 of

this appendix 208O=as defined in section 10.19.1 ofthis

appendix 10.27 The functions F5. FS. and F8 in Appendix E ofANSI!ASHRAE Standard 103- 1988 contain typographical errors iu the equations as they appear iu the ANSI! ASHRAE Standard 103-1988. The following
term is substituted for I'I'F.oeexp(

- tlToFFHo.56 (in F5 and FS) or l'I's.o"6Xp( -tlToFF))O.56 (in F8) where the term (+ 28) is missinS. The substituted term is: I'I'F.oeeXP( -tlToFF) + 28))0.56 (in F5 and FS)

or 1'I's.oeexp(

- tltoFF) + 28))0.56 (in F8).



# '. The complete corrected equations for F5. FS and F8 arepresented inTable 2 ofthis appendix for information only.

10.28 Direct 

### determination of 

### off-cycle lossesfor

### furnaces andboilers equipped with thermal 

### stack dampers.

### EE-RM-93-501 COMMENT 00



## 44564 Federal .Register 

### I Vol. 58, No. 161 

### I Monday, August 23, 1993 

### I Proposed Rules



## Table 1 System Numbers locate the column where all the characteristics are applicable to the unit under test
Characteristic 2 3 4 5 6 8 9 10


## Indoor Combustion Air Outdoor, Direct Vent or Isolated Combustion System
Direct Exhaust

Draft Hood or Draft Diverter

Barometric Draft Control

Electrical/Mechanical Stack Damper Atmospheric Burner

Power Burner

Burner Inlet Damper or Flue Damper **


## 0,



# •
S/F 

# x

x

x

x



# • x



# x

x

x

0.4



## or Dp



# • x



# x

x

x

0.4



## or Op 

# x

x



# x

x

0.4



## or Do



## 0.85 

## or 

## 0.79+0p 

## 1.4

1.4 

## or tesU 

# x

x



# x

x

* 

# x

x

x



# x

0.4

or 

# be



# * 

# x

x

x

x

0.8500 

## or (0.79+0p

## l!4, 1.4

1.4 or tesU 

# x 

# x

(Hay or may not

be present. Does not affect

the results.)



# x

x

or 

# DJ::t 

# x

x

0.4



## or Dp



# • = Calculated from CD2 

## values. 

# *

= 

## For atmospheric burner w/burner inlet damper or flue damper which closes within 10 seconds after the burner shuts off. 

# **

= 

## For direct vent, or atmospheric bUrner w/burner inlet damper or flue damper which closes within 10 

## seconds after the bUrner shuts off

. 

# •* = Power burner mayor may not have an electro-mechanical inlet or flue damper.

BILUHG CODE MIO-0100C

### Federal Register / Vol. 58, No. 161 / Monday, August 23, 1993 

### I Proposed Rules 

### 44565

TABLE 2.-FoRMULAS FOR THE FUNCTIONS F5. F6, ANOF8



## ( 'IIS,Oe

# T~ + 128

.. 

## )0.56 1 tOFF 

## Fs('IIS.o,tOFF/,oFP) = ( 

# )!
TOFF

# ~(---t**-~)-=-1.""""19** 100 

## toFF/rOFF 

# °

'IIF.Oe TOFF 

# + 630

BILUNG CODE &4S(HI1-P [ t 

# J O

.56


## 'IIF.Oe TOFF 

## + 28 

## "F.Oe

( t 

# JI.l9

'IIF.Oe TOFF 

## + 530

( t 

## )0.56

IJIS,Oe TOFF 

# +28

( t 

# )1.19

IJI

## S,Oe TOFF 

# +530 d_ t

_ 'OFF 

## d_ t

_ 'OFF

### 44566 Federal R.egister 

### I Vol. 58, No. 161 

### I Monday, August 23, 1993 

### I Proposed Rules



# Recirculation line Water supply**~** 

# Shut

.off**I---i~---L----t** 

# Check

Overflow

Outlet water temp.(within 12")

r--

--- 

# Inlet water Mixed temp.

Insulated constant head tank

I I, I 

# temp.(within 18") . I 

# Test I 

# Pump

Flow regulating valve : boiler I

I I

: I**_~**

### ______-L

_______



# Figure 1. Suggested piping arrangement for hot water boilers ... 

# .............

### Federal Register I 

### Vol. 58, No. 161 

### I 

### Monday, August 23. 1993 

### I 

### Proposed Rules 44567



## A 

# = Inside blower door B 

# = Internal section of vent pipe (Uninsulated) C 

# = Blower access door 

# 0= Flue collar 

# E 

# = Top of unit, vent connection F 

# = Diverter box or inducer motor

Air .flow

Inlet duct 

# ®

" I I, I I I I 

# @--+i**~** I I I I I I I I , I I ,



## Heat exchanger and

combustion area

Outlet duct



# . Air• flow



# Figure 2. Jacket loss down flow unit

BILLING COOE 1145CH11-C

### 44568 Federal itepIIer 

### I Vol. 58, No. 161 

### I Monday, August 23. 1993 

### I Proposed Rules

5. Appendix 0 to 

### Subpart B of

### Part 430 

### is amended as follows: 

### Appendix 0 

### to Subpart B 

### ofPart 430- 

### URit'orm Test Method for Measuring the Energy Consumption ofVented Home HeatingEquipment

8. 

### Section 3.5 is revised and sections 3.5.1 and 3.5.2 are added to read as follows:

3.5 Pilot light measurement. 3.5.1 Measure the energy input rate to the pilot light (OJ.) with an 

### error no greater then 3 percent for vented beaters so equipped.

3.5.2 For manually controlled beaters
wt>ere the pilot light is designed to be turned offby the user when the beateris not in use and instruction to do so Is given on the heater near the gas control valve (e.g. by label) by the manufacturer. the measurement ofQp need not be performed.



### h. Section 4.2.4 is revised to read as follows:

4.2.4 Weighted-averoge steady-state efficiency.

For manually controlled heaters with various input rates the weighted average steady-state efficiency (TJSS.WT). Is:

(1) At 50 percent ofthe maximum fuel input rate as measured in eithenecticm 3.1.1
to this appendix for manually controlled gBII

vented heaters or section 3.1.2 to this appendix for manually controlled oil vented heaters. or

(2) At the minimum fuel inputrate as measured in either section 3.1.1 to this appendix for manually controlled gas vented heaters orsection 3.1.2 

### to this appendix for manuallycontrolled oil1ll8ntad htl8len ifUte design ofthe lHtale!" is\!JUch that the 50 percent ofthe IDIIXimwn fIlel.iup1It nlte
cannot be set. provided this minimum rate is

no greater than % ofmaximum IRpUt rate of thehea

.....

For manually controlled beater with one single firing rete tlHt weighted ave

..steadystate efficiency is the steady-state effiCiency measured at the single firing rate.



### c. Section 4.2.6 is revised to read as follows:

4.2.6 Annual fuel utilization effICiency. For manuallycontrolled vented heaters. calculate the AFUE expressed as 

### a percent and defined as:



## 2950 l1ssQi.a-_ 

# AFUE=------------------------

where:

295O=average number ofheating degree

days

TJss=8S defined as TJSS.WT in section 4.2.4 of

this appendix
'l.,=8S defined In soction 4.2.5 ofthis

appendix 

### 0..-:88 defined as Q.. at the maximum

fuel input rate. as defined in section 3.1 ofthis appendix 46OO=average number ofnon-healing

eeason hours peryear 

## 2950 l1ssQin-max +2.083(4600) l1u Qp

Qp=as defined in section 3.5 01 Ihis

appendix 2.083=(65 -15) I 24=50/24 65=degree day base temperature. OF 15=national average outdoor design

temperature for vented heaters lIB defined in section 4.1.10 ofthis appendix 24=number ofhours in a day
For manually controlled V1lnl8d heaters where the pilot light can be turned offby the

USef when the heater is not in use as described in section 3.5.2. calculate AFUE expressed as a percent and defined as: AFUE=TJ. where:

TJ.=as defined in section 4.2.5 ofthis

appendix 

### d. Section 4.3.7 is revised to 

### read a8 follows:

4.3.7 Annual Fuel Utilization EffICiency. Calculate AFUE expressed as a percent and defined as:



## AFUE 

## = 2950 l1ss-WT l1u Qin-max

where:

2950=average number ofbeating degree

days TJss-wr=as defined in section 4.1.16 ofthis

appendix TJ.=as defined in section 4.3.6 ofIhis

appendix Q.._mu=IlS defined in section 4.2.6 ofthis

appendix 4600=85 defined in section 4.2.6 of this

appendix Qp=as riefined in section 3.5 ofthis

appendix 2.083=a8 defined in sechon 4.2.6 oflhis

appendix



### e. Add Sections 4.6. 4.6.1. 4.6.2. 4.6.3. 4.6.4.4.6.4.1. and 4.6.4.2 after section 4.5.3 and before the tables to read as follows:

4.6 AnnualEfficienc.v. An Annual Efficiency which incorporates fossil fuels and electrical energy. is defined

as, in percent: AE=1001e[(EJ01(AFI:El100}+3413(P, )!BOHlIl**!E~-+3413(?HEAE)J** where: 

## 2950 l1ss-WT Qin-max +2.083(4600) l1u Qp

EAE=as defined in section4.6.3 oftMs

appendix EI'=average annual fuel consumption as

defined in section 4.6.2 ofthis eppendix AFUE=AFUE as defined in sections 4.1.17.

4.2.6. and 4.3.7 of this appendix. percent PE=Auxiliary electric energy input rate as

defined in section 3.1.3 oflhis appendix BOH=National average number ofburner

operating hours. definnd in section 4.6.1 of this appendix as: :.(BOHss) for units with single stage or

manual controls

. =(BOH.,+BOH H ) for units with two stage or

step modulating controls F=the ratio ofthe energy consumed atthe

source ofelectrical generation to the electrical energy delivered at the vented heater. =3.37 3413=conversion factor from b;owalt to

Btu/h 4.6.1 National average number of bilmer operatmg hours. For vented heaters equipped wiln single stage controls or manual ccntrols. the national flH5rage number of burner operating hours is ddined as: BOHss=1416(A,J(.

... )(DHR)**~4~f,:l3]** where: 1416=national average beating load bours for vented heaters based on 2950 degree days and 15 OF outdoor design temper1rture At=O.6858. adjustment factor to adjust the

calculated design heating requirement and heating load hours to the actual heating load experienced by tbe heating systlllIl DHR=typica\ design heatingrequirements

based on QoUT. from Table 4 ofthis appendix. QOUT=HTJssil(0)

- Y(L;ll00)j.(Ginl l.j=jacket loss as defined in section 4.1.5 of

this appendix Y=2.8. adjustment factor as defined in

section 4..3.6 ofthis appendix TJss=steady·state efficiency as defined in

section·4.1.10 ofthis appendix. percent Q,.=as defined in section 3.1 oftMs

appendix at the maximum fuel input role A:l00000/[341300(PE)+(Giu

- QpHTJ.ll B=2.938(Qp)(T]u)(A]/l00000 100000=factor that accounts for percellt

and Kbtu**P~=as** defined in section 3.1.3 ofthis appendix

### Federal Register / Vol. 58, No. 161 / Monday, August 23, 1993 / Proposed Rules 

### 44569

Qp=as defined in section 3.5 ofthis

appendix llu=8S defined in section 4.3.6 ofthis

appendix for vented heaters using the
tracer gas method. percent

=as defined in section 4.2.5 ofthis

appendix for manually controlled vented heaters. percent =AFUE (2950)(llss)(Q,,)/[(2950)(llss}(Cl!o)

AFUE (2.083)(4600)(QP)] for vented heaters without manual controls and without thermal stack dampers and not using the optional tracer gas method. where AFUE = as defined in section 4.1.17 ofthis appendix. percent 2950=average number ofheating degree

days as defined in section 4.2.6 ofthis appendix 4600=average number ofnon-heating

season hours peryear as defined in section 4.2.6 ofthis appendix 2.938=(4160/1416)=ratio ofthe average

length ofthe heating season in hours to the average heating load hours 2.083=as defined in section 4.2.6 ofthis

appendix
For vented heaters equipped with two stage or step modulating controls the national
average number ofburneroperating hours at the reduced operating mode is defined as:**BOHR=XIEM/~ln** where:

Xt=8S dermed in section 4.1.14 ofthis

appendix**~In=as** defined in section 4.1.11 ofthis appendix EM=8Verage annual energy used during the.

heating season =(Q"

- <lJ.)(BOHss)+(8760

- 4600)(<lJ.) Q,,=8S defined in section 3.1 ofthis

appendix at the maximum fuel input rate Qp=as defined in section 3.5 ofthis

appendix BOHss=as defined above. in which the

term PEin the factor A is increased by the factor R. which is defined in section 3.1.3 ofthis appendix as: R=1.3 for two stage controls =1.4 for step modulating controls when the

ratio ofminimum- to-maximum fuel input is greater than orequal to 0.7 =1.7 for step modulating controls when the

ratio ofminimum- to-maximum fuel input is less than 0.7 and greater than or equal to 0.5 =2.2 for step modulating controls when the

ratio ofminimum- to-maximum fuel input is less than 0.5 A=100000/[341300(PE)(R)+(Q"

- <lJ.}(llu)] 876O=total number ofhours per year 4600=as defined in section 4.2.6 ofthis

appendix For vented heaters equipped with two stage or step modulating controls the national
average number ofburner operating hours at the maximum operating mode (BOHH ) is defined as: BOHH=X2EM /Q" where:

X2=as defined in section 4.1.15 of this

appendix EM=as defined above Q,,=as defined in section 3.1 ofthis appendix at the maximum fuel input rate 4.6.2 Average annualfuel energy forgas

oroilfueled vented heaters. For vented heaters equipped with single stage controls

or manual controls. the average annual fuel
energy consumption (Ed is expressed in Btu peryear and defined as: EFBOHss(Q"-<lJ.)+8760(<lJ.) where:

BOHss=as defined in section 4.6.1 ofthis

appendix Q,,=as defined in section 3.1 ofthis

appendix Qp=as defined in section 3.5 ofthis

appendix 8760=as defined in section 4.6.1 ofthis

appendix
Forvented heaters equipped with either
two stage or step modulating controls E., is defined as: EFEM + 4600(<lJ.) where:

EM=8S defined in section 4.6.1 ofthis

appendix 4600=a8 defined in section 4.2.6 ofthis

appendix Qp=as defined in section 3.5 ofthis**appendix~** 4.6.3 Average annual auxiliaryelectrical energy consumptionfor vented heaters.

For vented heaters with single stage controls ormanual controls the average annual auxiliary electrical consumption (EAEl is expressed in kilowatt-hours defined as: EAE=BOHss(PE ) where:

BOHss=8s defined in section 4.6.1 ofthis

appendix PE

=8S defined in section 3.1.3 ofthis appendix
For vented heaters equipped with two stage or modulating controls EAE is defined

as: EAE=(BOHR + BOHH)(PEl where:

BOHR=as defined in

### ~tion 4.6.1 ofthis

appendix 'BOHH=as defined in section 4.6.1 ofthis

appendix PE=as defined in section 3.1.3 ofthis

appendix 4.6.4 Average annual energy consumptionfor vented heaters located in a different geographic region ofthe United States and in buildings with different design heating requirements.

4.6.4.1 Average annualfuel energy consumptionfor gas oroilfueled vented homeheaters located in a different geographic region ofthe United States and in buildings with different design heating requirements.

For gas or oil fueled vented heaters the average annual fuel energy consumption for

a specific geographic region and a specific typical design heating requirement (EFR) is expressed in Btu per year and defined as: EFR=[(EF

- 8760 <lJ.) HLH I 1416) + 8760 <lJ. where: EFas defined in section 4.6.2 ofthis appendix 8760=8s defined in section 4.6.1 oftbis

appendix Qp=as defined in section 3.5 ofthis

appendix HLH

.. heating load hours for 

### a specific geographic region determined from the heating load hourmap in Figure 3-ofthis appendix 1416=88 defined in section 4.6.1 ofthis

appendix 4.6.4.2 Average annual auxiliary electricoJenergyconsumptionforgas or oil fueled ventedhomeheaters located in a differentgeJJgraphic region of the United States and in buildings with different design heatingrequirements.

For gas or oil fueled vented home heaters the average annual auxiliary electrical energy consumption for a specificgeographicregion and a specific typical design heating requirement (EAERl is expressed in kilowatthours and defined as: EAER=EAE HLH 11416 where:

EAE=as defined in section 4.6.3 ofthis

appendix HLH=as defined in section 4.6.4.1 ofthis

appendix 1416=a8 defined in section 4.6.1 ofthi8

appendix



### F. Table 4 and Figure 3 are added in the appropriate location to the end of Appendix 0 ofSubpart Bof 10 

### CFR part 430 

### to read as follows:

TABLE 

### 4.- AVERAGE DESIGN HEATING REQUIREMENTS FOR VENTED HEATERS WITH DIFFERENT 

### OUTPUT CAPACITIES

Vented heaters output capacity Qou.-(Btuhlr)

5,000-7,499

.............................. 7.500-10.499

............................ 10,500-13.499

.......................... 13,500-16.499

.......................... 16.500-19.499

.......................... 19.500-22.499

.......................... 22,500-26,499

.......................... 26.500-30.499

.......................... 30.500-34.499

.......................... 34.500-38.499

.......................... 38,500-42.499

.......................... 42.500-46.499

.......................... 46.500-51.499

.......................... 51.500-56.499

..........................**56.~1.499** .......................... 61.500-66.499

.......................... 66.500-71.499

.......................... 71.500-76.500

.......................... 

### Average design heating

requirements (Kbtuhlr)

5.0 7.5 10.0. 12.5 15.0 17.5 20.5 23.5 26.5 30.0 33.5 36.5 40.0 44.0 48.0 52.0 56.0 60.0

### EE-RM-93-501 COMMENT 00

44570 Federal Jtegister / Vol. 58, No. 161 / Monday, August 23, 1993 / Proposed Rules



### 3500



# ALASKA HAWAII AND TERRITORIES 2500



### 3500 HLH 

# o HLH

This map**I~** nasonahly accurate for most parts

## or the United States bulls necessarily Ileneraliled. and conselluenlly nol tllO accurutt' In mountainous regions, particularly In the**Rllckl~.**

F 

### rr.URE 3- IInting IAllid lIuurs (111.11) fClr the United Stalt!! and Canada

IILUNO 0001 .....o1-C 

### 1600

### Federal Register I 

### Vol. 58, No. 161 I 

### Monday, August 23, 1993 I 

### Proposed Rules 44571

6. Appendix P to Subpart B ofPart 430 is revised to read as follows: Appendix P to Subpart B 

### ofPart 430- Unifonn Test Method for Measuring the Energy Consumption 

### ofPool Heaters

1. Test method. The test method for testing gas- and oil-fired pool heaters shall be as specified in ANSI Standard for Gas-Fired Pool Heaters, Z21.S6-1990.

2. Test conditions. Establish the test conditions specified in section 2.8 ofANSI Standard Z21.S6-1990.

3. Measurements. Measure the quantities delineated in section 2.8 ofANSI Standard Z21.56-1990, except in the case ofoil-fired heaters the measurement ofenergy consumption in Btu's is to be carried out in appropriate units, e.g., gallons.

4. Calculations. Calculate the thermal efficiency (expressed as a percent) as specified in section 2.8 ofANSI Standard Z21.56-1990, except in the case ofoil-fired heaters the expression offuel consumption shall be in Btu's.

4.1 AnnualEfficiency. An Annual Efficiepcy which incorporates fossil fuels and electrical energy, is defined as the ratio ofthe annual output ofenergy delivered to the pool water (fossil fuel) to the total annual energy input to the pool heater, and is, in percent: AE=E,.Eon/(Ep+F-E

.. ) for pool heaters with pilot light ignition =E,/(1+(F-1).PEI(<l!N+PE)) for pool heaters

without pilot light ignition where:

E,=thermal effiCiency as defined in section

2.8.1 ofANSI Standard Z21.S6-1990, percent

..

steady-state efficiency as defined in section 2.8.2 ofANSI Standard Z21.S6- 1990, percent Eo.,=average annual energy consumption when burner is on, as defined in section 4.2 ofthis appendix EFa8 defined in section 4.3 ofthis

appendix Qp=energy consumption ofcontinuously

operating heater pilot light, ifemployed, Btuth E..=Average annual auxiliary electrical

energy consumption for pool heaters a8 defined in section 4.4 ofthis appendix, Btu F=the ratio ofthe energy consumed at the

source ofelectrical generation to the electrical energy delivered at the pool heater, =3.37 Olrr=rated fuel energy input as defined in

section 2.8.1 or 2.8.2 ofANSI Standard Z21.56-1990, Btulh PE=2.Ec ifheater tested according to

section 2.8.1 ofANSI Standard Z21.56- 1!t90 =3.413.PEr- ifheater tested according
to section 2.8.2 ofANSI Standard Z21.56-1990 Ec=measured electrical energy

consumption over a 3G-minute interval

as defined in section 2.8.1 ofANSI Standard Z21.56-1990, BtuI(30 minutes) 2=factor converting Btu per 30-minute to

Btuth PEn.1ed=nameplate rating ofauxiliary

electrical equipment ofheater, Watt 3.413=factor converting Watt to Btulh 4.2 Average annual energyconsumption when burneris on. The average annual energy consumption when the burner is on (Eoo) is defined as: Eon=(BOH)(OlN+PE) where: BOH=average number ofburner operating hours, = 104 Olrr=rated fuel energy input as defined

according to section 2.8.1 or 2.8.2 of ANSI Standard Z21.56-1990, Btulh PE=electrical input when burner is on, as

defined in section 4.1 ofthis appendix
4.3 Average annualfossilfuel energy for pool heaters. The average annual fuel energy for pool heater (EF) is defined as: EF(BOH)(OlN)+(POH-BOH)(Qp)
where:

BOH=average number ofburneroperating

hours as defined in section 4.2 oUhis appendix POH=average number ofpool operating

hours, = 4464 Qn.r-rated fuel energy input as defined

according to section 2.8.1 or 2.8.2 of ANSI Standard Z21.56-1990 Qp=energy consumption ofcontinuously

operating pilot light ifemployed. It is assumed that the pilot is turned off during non-pool season ofthe year, Btul h 4.4 A verage annual auxiliaryelectrical
energyconsumptionforpool heaters. The
average annual auxiliary electrical energy consumption for pool heaters (E

.. ) is exprassed in Btu and defined as: E..,=(BOH)(PE) where:

BOH=as defined in section 4.2 ofthis

appendix PE=as defined in section 4.1 ofthis

appendix (FR 

### Doc. 93-19268 Filed 8-2G-93; 8:45 am)

BlLUNQ CODE M5O-01-f>