## 43930



# FEDERAL ENERGY ADMINISTRATION [ 10 CFR Part430 ] ENERGY CONSERVATION PROGRAM FOR APPLIANCES 

### 'PROPOSED RUlES



## SUPPLEMENTARY INFORMATION: 1977 (42 FR 15423, March 22,1977) PEA

A. Background. 

## proposed test procedures for dlshwashThe Federal Energy Administration ers. This notice also included certain (PEA) proposes to amend Chapter II program definitions which have not yet of title 10, Code of Federal Regulations, been finalized. Proposed test procedures in order to :prescribe test procedures for for water heaters, television receivers, vented home heating equipment, a class refrigerators and refrigerator-freezers, Notice of Proposed Rulemaking and Public within-the product type "home heating freezers and clothes dryers were issued Hearing equipment, not including furnaces," pur- on April 21, 1977 (42 FR 21576 at seq., AGENCY: Federal Energy Administra- suant to section 323 (42 U.S.C. 6293) of April 27, 1977). Proposed test procedures tion.

_ the Energy Policy and Conservation Act for unvented home heating equipment ACTION: Proposed

# rule. (Act) fPub. L. 94-163). The adoption of were issued on May 4, 1977 (42 FR 23860, test procedures does not mean that ac- May 11, 1977), and proposed test proce

.. tual testingmust be conducted. The pro- dures for automatic and semi-automatio cedures merelyestablish standard meth- clothes washers were issued on May 11, ods for testing when testing is otherwise 1977 (42 FR 25329, May 17, 1977), includrequired by the Act itself or by regUla- ing a determination that test procedures tions implementing other parts of the cannot be developed for any other class program. For example. the Federal of clothes washers. Proposed test proce- Trade Commission (FTC) may require dures for humidifiers and dehumidifiers that all or part of the test procedure be were issued onMay 25, 1977 (42 FR 27941, conducted in exercising its appliance en- et seq., June 1, 1977). Proposed test proergy efficiency labeling authority**regard~** 

## cedures for central all' 

## conditioners were ing a particular appliance type., issued on Jane 7,1977 (42 FR 30401, Juno SUMMARY: The Federal Energy Administration hereby proposes to anillnd its regulatiOns in order to prescribe test procedures for vented home heating equipment under the Energy Policy and Conservation Act. The Act requires that standard methods for testing vented home heating equipment a class within the type "home heating equipment not including furnaces," be prescribed as part of the energy conservation program for appliances. The intended .effect of this proposal is to implement the Act's requirements for the solicitation of pub- lic comments before the test procedures
are prescribed. The Federal Energy Ad':' ministration is hereby**~lso** 

## scheduling
a further public hearing on theproposed energy efficiency improvement target for home heating equipment, not Including furnaces.

- DATES: Comments by October 25,'1977. 4':30 p.m.; requeStS to speak by October 21, 1977, 4:30 p.m.; statements by November 1. 1977. 4:30 p.m.; hearing for proposed test procedures 

## to be held on November 2, 1977. at 9:30 a.m.• and for propo,sed energy efficiency improvement target10n November 2,1977, at 1:30 p.m. ADDRESSES: Requests to**sp~ak** 

## at the hearings to: Executive Communications, Room 3317, Federal Energy Administration, Box OQ (for the proposed test pro- cedures) or Box NU (for the proposed target), Washington, D.C. 20461. Oral Statements 

## to: Regulations Management, Room 2214, Federal Energy Ad-

> 

## ministration, 2000 M Street NW., 

## Washington, D.C. 20461. HEARINGS HELD AT: Federal Energy Administration, Room 2105. 2000 M Street NW., Washington, D.C. 20461. FOR FURTHER INFORMATION CONTACT:

James, A. Smith (Program Office) • Old Post Office Building;, Room ,307. 12th and Pennsylvania Avenue NW.; 

## Washington, D.C. 20461 (202-566-4635). Robert C. Gilette (HearingProcedures)

, 2000 M Street NW:, 

## Room 222A, Washlniton, D.C. 20461 (202- 566-5201)

, Jim Merna (Media Relations), 12th and Pennsylvania Avenue NW •• 

## Room 3104, Washington, D.C. 20461 (202- 566-9833). LaurenceJ. Hyman (Office of the General Counsel), 12th and PennsylVania Avenue NW., 

## Room 7146, Washington; D.C. 20461 (202-566-9750). By notice issued May 10, 1976 (41 FR 14, 1977), and were followed by proposed 19977. May 14. 1976). PEA proposed to test procedures for conventional ranges, estabiish Part 430. entitled "Energy,con- cooking tops and ovens, as well as mlcroservation Program for Appliances," in 

## wave ovens, which were iSSUed on Juno Chapter II of Title 10 of the Code of 9, 1977 (42 FR 30627, June 16, 1977). ThoFederal Regulations. That notice pro- latter notice included a determination to posed a Subpart A 

## to Part 430. contaln- delay the publication of test procedures ing general program provisions. and a for any other class of the type "kitchen Subpart C. containing proposed energy ranges and ovens." The proposed test efficiency improvement targets. Bynotice procedures Jor turnaces were issued on isSued(July 22, 1976 (41 'FIt 

## 31237. July July 28, 1977 (42 FR 40826, August 11. 27, 1976), FEA proposed an amendment 1977). By this notice, PEA is proposing to proposed Part 430 to add a Subpart B test procedures for vented home heating which would contain the appliance test equipment. procedures required 

## to be prescribed by Section 323(11.) (2) of the Act requh'es sec_tion 323 of the Act. Subparts A and B PEA 

## to direct the National Bureau of
were established by notice issued on May Standards (NBS) to develop, for specifi-**2~.** 

## 1977 (42 FR**3664~,** 

## July. 15. 1977)
, cally,named types of covered produots, WlthdraWing the origmal proposal of test procedures for the determination of Subpart C and reproposing a new Sub- the estimated alUlllal operating costs part C contaiD,ing proposed energy effi- and at least one other useful measure 

## of ciencY improvement targets for the prod- energy consumption which PEA detcructs listed in 1-10 of section 322(11.) of mines is likely to assist consumers in the Act. Energy efficiency improvement making purchasing decisions. pursuant targets for the products listed in 11 and to the Act PEA directed NBS 

## to develop 12 of section 322 (a) were proposed by testprocedures for PEA's use inprescrJbseparate nptice (42 FR 40701, August 11. ing test procedures under the Act. As 

## 1977).

_ part of this undertaking, NBS evaluated

Proposed test procedures for each existing 

## test procedures for measuring product listed in 

## 1-10 of section 322(11.) energy consumption of vented home of the Act were published prior ,to the heating**equipment~** 

## hearing on the proposed energy efficiency Current testing and rating require-**~provement** 

## target for each product ments for vented home heating equlP- WIth the exception of vented home**hea~'** 

## ment aredescribed in a number of standingequipment.**Beca~e F;E.A,~lieves**  

## that ards, including: American National reference 

## to proposed**~** 

## :procedures Standards Institute (ANSI) Z21.48-1976

can facilitate public comment on the for gas fUeled gravity and fan type fioor proposed targets, PEA has. by recent furnaces; ANSI Z21.49-1975 for gas FEDERAL REGISTER notice (42 FR 42361, fueled gravity and fan type vented wall**Augus~** 

## 23, 1977), extended .the deadline furnaces; Z21.1l.1-1976 for gas 

## fueled for wnttencomment ,?n then,nprovement vented room direct vent wall furnaces: target for home heatIng eqwpment (not. 1 4 including furnaces) to October 25-. 1977**Und~rwnters** 

## Laboratory**(~)** 

## 729- 97 andhas announced theholding of an ad- for oil fueled fioor furnaces, and UL 730- ditional hearing. Thisheaiing. to be held 1974 for oil fueled wall furnaces. Theso at the time and place specified above. standards measure the steady state em- supplements. the'hearing.on**~e** 

## home ciency ofvented home heating equipment heating. eqwpment- (not_ mcluding fur- but do not account for any 

## part load 01' naces) Improvement target held on Au- al rf 

## ff ts In 

## rdel' gust 19. 1977.' season pe ormance e ec. 0



## The notice issued on May 24,,1977 in- to estimate the seasonal efficiency nnd 

## ,cluded final test procedures for room air annual operating cost of fossll fuel conditioners. By notice issued March 17, vented home heating equipment, it is

FEDERAL REGISTER, VOL. 4;Z, NO. 169-WEDNESDAY, AUGUST 31, 1977

## necessary to account for the various heating system losses under cyclic or pa.rt 

## load operating conditions and for the effect of combustion and draft con- trol air 

## on infiltration. The test procedures and calculation methods formulatedby NBS andproposedherein today, account-for thesefactors.

Under the requirements of section 32 of the 

## Federal Energy 

## Administration Act of 1974 <15 

## U.S.C. 761 et. seq.), 

## as amended by section 9 of the Federal En

## ergy Administration Authorization Act of 197'1 (Pub. L. 

## 95-70), the Administrator must name in the notice of rulemaking any 

## non-governmental organization which promulgated commercial standards containedin, 'authorizedby, or required to be used 

## by, a prQPOSed rule. Additionally, the Administratormust 

## ascertain the extent to which the named organization is 

## structured, in 

## membership and in standards-development procedures, to aIlow forpublic participation and representation, and render 

## a. determination 

## as to whether or not the organization achieves the degree of public participation called for by section 32 (b) of theAet. '

Following recommendations made by NBS, 

## the FEA 

## luis incorporated com- mercial standards promulgated by the following organizations in this 

## proposed rulemaking:. American National Standards

## Institute,AmericanSocietyfor Testing 

## and Materials, 

## and Underwriters Laboratory. An 

## additional standard, American Wire Gauge, which v;as 

## developed by the now defunct Brown and SharPe 

### Company, 

### has also been 

### incor

## porated. None of these orgalzations had memberships, at the time 

## of the promulgation of the 

## standards, which were sufficiently balanced as 

## to allow effective representation of all 

## interested per-**~ns** 

### within

## themeaningofsection32 (b). 

## In this

## regard,theAdministratorhas 

## determined 

## that these organizations do not provide for the full range of public par

## ticipation that section 32(b) sets forth.

In this 

## rulemsk1ng, FEA is 

## providing interested persons an opportunity 

## to commenton the appropriateness ofthese standards as used in the vented home heating equipment 

## test procedure. Comments are SPecifically requested on any specific changes the person commenting believes arenecessary tomakethe standards 

## appropriatefor thepurposes oftesting 

## vent;eg home heating equipment.

Today's proposal adds to § 

## 430.2.a definition of "vented home heating equipment" and amends the 

## definition in § 

## 430.2 of "Basic

## Model" 'by adding a subpara"oraph (15) applying specifically to 

## vented home heating equipment. In



## . addition'; § 

## 430.2 contains definitions promulgated or**proposed~reviously** 

## (42 FR

. 15423, March 22, 1977) someofwhich are

applicable to the test procedures for vented home heating equipment. Comments on these definitions are timely as provided below.

B.

## Measures ojEnergy Consumption. The Actrequires PEA to prescribe 

## test procedures for the det€rminationof estimated annual operating costs and at least one other useful**~asure** 

## of energy PROPOSED RULES


## consumption' which the AdmInIstrator determines is likely 

## to assist consumers in making purchasing declsJons. The estimated annual operating cost for vented home**h~ting** 

## equipment in proPOSed § 

## 430.22(0) is

## basedupon the aver- age annual energy consumption of the vented home heating equipment and 

## the representative average unit cost of energy.

NBS has developed 

## a. method of 

## calculating a typical annual cost of operation for vent.ecl home heating equipment which 

## takes Into account the nnnualfuel utllizatlon efIlclency, the heating load hours, the residence design heatloss, the auxiliary electrical energy used by circulating air fan motors, powered burner motors, and the pilot Input**rat~** 

## 1! applicable.

Also 

## proposed in § 

## 430.22(0) 

## are test procedures regarding the estimnt.ecl 

## annual operating costby geogmphlc region of the United States, since energy con- sumption and annual operating cost of vented home heating equipment are directly related to geogmphIc location. Annual cost of operation by geographic location may be useful for consumers in 

## making purchasing declsJons with 

## respect to vented home heating equipment in addition 

## to the single national aver- age value appllcable to any 

## speclflc unit under proposed § 

## 430.22(0). Also 

## proposed in § 

## 430.22(0) 

## are test procedures for calculating annual operntIng costs for several standardized design heating requirements for each 

## region in 

## order 

## to facilitate the comparison of operating costs of dlfferent sizes of vented home heatingequipment:

The proposed test procedures for'1'eglonal costs will

## Incorporate

## a. map ofthe continental United states with 

## regional "heating load hours" for adjusting the representative average use cycle (typical annual usage) of vented home heating equipment by geographic location. These regional values of "heating load hours"

are based on tqe average number of degree days and the outdoor design 

## temperaturefor eachreglon.

,

An 

## additional proposed measure of energy consumption in § 

## 430.22(0) 

# that is likely 

## to assist consumers in 

## making purchasing declsJons is 

## the fuel utiUzation efIlclency. ThIs 

## eIDclency is 

## theratio 

## pf the heater's annual output of useful energy to the annual fuel energy Input .of theheater multlplled by 100. The test procedures are designed to measure the fuel utillzatlon efIlclency at 

## a. part load operating condition in 

## order to 

## account for both on-cycle energy losses and ofrcycle energy losses. Both types 

## of losses

can be 1n1luenced by the design charncteristlcs and features of the. 

## heating equipment.

On-cyclelosses Include: (1) 

## Energy contained in the combustion gases which aredischarged outdoors ·throughthefiue; (2) The loss of heated room air 

### used 

## for combustion at the burner and for dilution of-hot combustion gases 

## through the integral draft diverrer 

## or barometric draft

## regulator.

Off-CYcle losses Include: 

# 48931

(1) 

## Tne loss of heat stored in 

## the metal of the heat exchanger when the burner and circUlating warm air 

## blower shutsofr;

(2) The loss ofheated room air

## which escapes 

## through the open heater stack pipetotheoutdoors; (3) FuelInputto 

## a continuouslyburninggaspilot.

:PEA 

## recognizes that there may be additional useful measures of energy con- sumptionforventedhomeheatingequipment other than the measures descn1Jed above. Accordingly, today's proposal, in 

## proposed § 

## 430.22(0), provides for the addition of other \Iseful measures which the AdmInistrator determines are likely 

## to 

## nsslst consumers in making 

## purchasing 

## decisIons. These measures. however, must be derived from the appllcation of theun1!orm testmethodsproposedtoday


## as Appendix 0 

## to Subpart B. vented home heating equipment manufacturers 

## would, 1! required, only have to 

## perform dllIerent computations with 

## the data generated by the existing 

## test methods contained in Appendix O.

C. Laboratory Methodology. 

## Theproposedtestproceduresarebased upon the heat loss method, inwhich the senslble and latent heat losses through 

## the stack are 

## determined. Since these losses will 

## depend upon such factors as 103d,cycling 

## rate, chlmney 

## height. over- sIzIng, the type 

## of draft 

## control device. the infiltration characteristics of a residence and theweatherprofile, itis 

## desirable to measure in the laboratory quantities which characterize the perform-

ance of 

## n. ventedheaterunder standardIzed laboratory test conditions and then to calculate Its performance under typi

### cal 

## field conditions. ThIs 

## has the advantage orsImpli!y1n.g the amount ofexperi

## mental laboratory data required and thereby reducing the costs oftesting.

The test procedures require measure- ment of the stcady-stat€ performance of


## n. vented heater in order to calculate 

## a. steady-state efIlclency. For vented heat-

ers without integral draft diverters, this is

## accomplJshedbymeasurlngthe steady

## state fiue gas 

## temperature and the con- centration by volume of carbon dioxide inthefiue gas.

## Forventedheatersutilizing integral draft dlverters, the st€adystate performance is 

## determined by measuring -the steady-state stack gas 

## temperature and the concentration by volume of carbon dioxide in 

## the dry 

### stack gas. This 

## latter method is 

## em- ployed because of the difficUlty in 

## accu- rately measuring fiue gas 

## temperatures and concentrations of carbon dioxide in 

## units with 

## integral draft diverters.

The 

## test procedures accountfor cyclic e1Iects by measuring fiue gas 

## remperatures during warm-up from a cold 

## start (for gas 

## fueledheaters) and duringcooldown from steady-state operation. As 

## noted above, actualfiue gas 

## temperature measurements on vented heaters with 

## integral draft divert€rs are difficult 

## to make. 

## However. forpurposes of accounting for transient e1Iects, it was determined 

## that fiue gas 

## temperatures could be measured by blocking the integral draft**div~** 

## rellef opening, replacing

FEDERAL REGISTER, VOL. 42, NO. 169-WEDNESOAY, AUGUST 31, 1977

## 43932 'PROPOSED !RULES



## the 5 foot stack with a 2 foot length of. zation efficiency calculation and annual pipe, and measuring the temperature operating cost calculation are contained and CO, concentration of the flue gas. in Appendix A of the NBS test procedure The flue gas temperature profiles are review document. A worksheet is 

## illusdetermined by making two discrete flue. trated which may be used 

## to keep track gas temperature measurements during of the experimental data and thevarious warm-up and three discrete measure- step-by-step calculations. ments during cool-down. The use of dis- Assigned values of the factors S/F, D

.. 

## crete warm-up and cool-down tempera-. and/or Ds 

## are given in 

## Tables 1 and 2. ture measurements reduces the amount The factor if> 

### is 

## the fraction of combusof data required and greatly simplifies tion and draft control air which' con':' the process of data reduction. The times tributes to additional residential infiltraat which these discrete flue gas tempera- tion. NBS has determined this factor ture measurements are made were typically equals 0.70 for vented heaters chosen to minimize the .errors involved using indoor air. The quantity (1 

# + a) 

## in calculating the on-cycle**loss~,** 

### is 

## the ratio of the heater's steady-state

In 

## addition to the above mentioned output to the design heating requiretests, certain factors, which describe the ment of 

# a. typical residence and is 

## set flow rates through the flue and stack equal to 1.70 for the purpose of calcuduring the on and off-periods, are as- lating a fuel utilization efficiency and an signed according to the type of equip- average national operating cost

.. ment under test. The factor S/F, 

## which The steady-state latent and sensible is 

## the ratio of stack gas 

## mass flow rate to heat_losses and the steady-state effiflue gas mass flow rate under steady- ciency, '1SS, 

## are also calculated in section state operation and at an average out- 4.1. The flue-gas and stack-gas tempera- door temperature of 42° F (5.56° C), is 

## ture profiles, corresponding to warm-up used to estimate the infiltration losses from a cold start and cool-down from during both the on and off-cycles. By steady-state operation, are then ap- assigning values Which are 'based upon proximated by simple exponential funcfleld data, the need to simulatefield con- tionshavingthe form ditions in the laboratory (e.g., a high (ae-I/r+b). 

## chimney, a low outdoor temperature, a

. typical barometric draft regulator set- The parameters ill 

## these functions ting, etc.) is avoided. A factor DF 

## repre- • 

## TdN, TOri, ()p. 

## o. X, ",p, 

## o. X, "'p. <». 

## X, "'S. 

## o. x, 

## sents the ratio of thegas mass flow rate and through the flue during the off-cycle to "'S.<».X 

## the gas mass flow rate through the flue during the on-cycle at identical temperatures. A similar quantity, Ds, 

### is 

## the ratio of the stack gas mass flow rates during the on-period to the stack gas mass flow rate during the off-period at identical temperatures:The values of DF 

## and Ds 

## depend upon whether the system being tested employs, a stack damper and/or a power burner. If 

## a unit is 

## equipped with a stack damper, its effectiveness is 

## determined by measuring the amount of stack area which the damper blocks during the off-cycle. Vented heat-
ers using power burners may employ an assigned power burner factor of Dp=0.30


## or measure Dp 

## directly by employing a tracer gas to determine the mass flow rate in the flue while the power burner is 

## off. are determined from the warm-up, cooldown and steady-state flue temperature measurements and are corrected for the effect of Cycling to·obtain the flue-gas and stack-gas temperature-vs-time profileS' which would exist if 

## the unit were operating in the field at a heating load factor equal to 22.5 percent. For units designed to 

## use outdoor air for combustion and draft control, a further adjust-, ment to these profiles are made using a correction factor C. 

## to account for the fact·that the air used to combustion has an average temperature of 42' F (5.56° C). termined that the representative aver- age-use cycle for vented home .heating equipment is 2,080 heating load hours per year. This determination is based upon an NBS recommendation to PEA. The NBS recommendation is included in the NBS test procedure review document which is available for inspection as provided for later in this notice.

The average use cycle of 2,080 heating load hours for vented heaters was derived in an analysis performed by NBS which considered outdoor temperature data extending over a 25 year period at locations in each of the 48 states in tho continental United states and the DIstrict of Columbia. In 

## addition, the num

.. ber of housing units in each state using gas or 011 as the primary fuel for heating as reported in the 1970 U.S. Census.
was also used in the analysis.

Using the number of housing units by state as a weightingfactor, and the aver- age outdoor design temperature at each location, a national average outdoor design ·temperature Was calculated to be 5' 

# r.A similar computation was per- formed USing average annual heating degree day values for each state resUlting in a national average of 5,200 heating degree days. The average annual heating load hours was then calculated by multiplying the average number of degree days by 24 and dividing that result by the temperature difIerencebetween 65· F and the average outdoor design temperature; the result being 2,080 heating load hours per year. •

FEA has developed representative average unit costs of energy needed to calculate the annual operating cost for ·the representative average use cycle. This 

## information was provided by notice issued July 11, 

## 1977 (42 FR 36549, July 15,1977).

E. Number oj Units to be Tested. 

## Proposed § 

## 430.23 (0) 

## would provide for sampling of each basic model to be tested when testing of vented homo heating equipment is required by the Act
or by program.regulations of agencies re- sponsible for administering the Act. This provision is intended both to provide 10l 

## acceptable level of assurance that test results are applicable to any entire basio model for which testing is required and to minimize the testing burden on manu- facturers. FEA believes that the sam- pling approach proposed today will en- able consumers to make meaningful comparisons of information appearing
on appliance labels, and also will meet the requirements of section 323(b) of the Act that test procedures not be unduly burdensome to conduct. Wherever possible .the test methods reCommended herein have been based upon existing consensus standards and procedures presentlyemployed by manu- facturers to evaluate the performance' of vented home heatilig equipment. This


## was done to reduce the amount of dupUcate testing required and to obtain a set of performance tests which would be within the capabilities of the entire home heatingindustry. The flue-gas and stack-gas tempera- ture-vs-timeprofiles are employed, along with the factors describing the on- and off-cycle air flow rates, to calculate the dynamic system losses La,on, Ls,ott, LI,on, 

## and LI,ott 

## at the average heating load factor and the average outdoor temperature of 22.5 percent and 42' F (5.56' C), respectively. These losses, together with the latent heat loss, jacket loss on outdoor units, and the pilot light energy loss during. the nonheating season, are then used to calculate an annual fuel utilization efficiency, EFFY A.

, 

## Under proposed § 

## 430.23 (0), 

## a.samplo D. Representative Average Use Cycle. 

## of sufifcient size of each basic model A step-by-step calculation procedure for determining fuel utilization efficiency based upon an average U.S. weatherpattern is 

## given in sections 4.1 and 4.2 for gas and oil fueled vented heaters. This 

## efficiency factor is 

## used to'estimate the annual coot of operation in different climatic regions and an average operating Cost for the country. The technical background, assumptions and equations which fonn the basis for the fuel 

# utili" Section 323(b) (2) (42 U.S.C. 6293(b) would be tested to assure that, for cach (2» of the Act provides that test proce- measure of energy consumption dedures for determining estimated annual scribed in § 

## 430.22(0), there is a 95 peroperating costs of any covered product cent probability that the mean of the shall be 

## calculated from measurements

- values of these measures of the sample is of energy use in a**repr~entative** 

## aver- within 5 percent of the true mean of age-use cycle (as·deternnned by the Administrator) and from representative these measures of the basic model. The average unit costs (as provided by the size of the sample of a particular basio Administrator) needed to operate such**mo~el** 

## will depend upon the following product during such cycle. PEA has de- factors:

FEDERAL REGISTER, VOL. 42, NO. 169-WEDNESDAY, AUGUST 31, 1977



## -.(1) 

## the level of confidence required (set at 95 percent in 

## the proposed regulations) ; (2) the maximum allowable difference between the sample mean and the mean of the basic model (expressed in the proPOSal as a percent of the true mean and set at 5 percent) ; and

(3) the relationship of the mean and standard deViation of the basic model.

The relationship of the mean and standard deviation of the basic model
can be determined from data available to manufacturers. With this 

## information and using standard statistical techniques, manufacturers can determine the number of units reqUired to be tested. In any 

## case, at least 1 unit of each basic model must be tested. Sample units woUld be selected randomly from the production stream.

Manufacturers and other interested persons are encouraged to comment on

. the sampling approach. Manufacturers

.are especially encouraged to submit any 

## datawhich relates to the size of thesamples which the provision would require to be tested. Comments alleging that the sampling prOvision is 

## burdensome should include a fUll discussion ofthefacts upon which such allegation is 

## based.

F. Request for Particular Comments. 

## While PEA is 

## soliCiting comments on all aspects of the proposed test proce- dures for vented heaters, PEA is 

## par- ticUlarly interested in receiving comments on the following subjects:

1. Other useful measures of energy consumption or data on typical consumer usage of vented home heating equipment in

## additiontothoseproposed today.

2. Definitions already promulgated or proposed in § 

## 430.2 which may affect the testing of vented home heating equipment. Comments with respect to such definitions are timely until the close of

. the written record as specified below. In addition to the definition of basic model for vented home heating equipments, the following definitions are prop.osed today: vented nome heating equipment; vented wall furnace: vented :floor furnace; vented room heater; and directventsystem.

The following definitions preViously proposed in § 

## 430.2 (41 FR 19377) are hereby withdrawn: vented gas and oil :fired 

## room heater; vented circulator; fan type vented circulator; and vented overhead heater.

G. Comment Procedure. 

## 1. Written Comment. 

## Interested persons are inVited to 

## participate in this 

## rulemaking by submitting data, Views or arguments willirespect to the proposed test proCedures for vented home heating equipment or the proposed target hearing set forth in 

### this 

## notice to 

## Executive Communications, Room 3317, Federal Energy Administration, Box OQ, (pro- posed test procedure) or Box NU (proposed target). Washington, D.C. 20461.

Comments should be identified on the outside of the envelope and on documents submitted to FEA with the desig-

- nation "Vented Home Heating Equipment--Proposed Test Procedures" or "Home Heating Equipment--Proposed 

## PROPOSED RULES 

## 43933
'target," respectively. Fifteen copIes senting statements. Any 

## decision made should be submitted. Comments received by PEA with respect to the subject matby October 25,1977, before 4:30 p.m., and • ter of the hearinl5S will 

## be based on all 

## all otherrelevantin1'ormnlon, willbe

## con- Information available to PEA. 

## At the sidered by FEA beforefinnl actIon Is tak- 

## conclusion of all 

## inItial oral statements
en on the proposed test procedures. at each hearing, each person who has

Any 

## information or data consIdered made an oral statement will

## be given the confidential by the person furnlshlng it opportunity if 

## she or he so desires. to must be so ident.ifl.ed inwriting, and only make a rebuttal statement. The rebutone copy of theinformation needbe sub- tal statements will be 

## given in 

## the order

- mitted. FEA reserves the 

## rIght 

## to deter- in Which the initial statements were mine the confidential status of the in- made and will 

## be subject to time limi

## formation or data and treat it accord- tations. ing to its determination. Any Interested person may submit

2. Public Hearings. 

## (a) Request pro- 

## questions tobe asked ofanypersonmakcedure. 

## The time andplace ofthesepub- ing a statement at thehearings to Execlic hearings are indlcated at the begin- utive Communications. PEA. 

## before 4:30 ning 

## of this 

## preamble. The hearings 

## Will p.m., October 25, 1977. FEA will 

## deterbe continued, if necessary, on Novem- mine whether the question is 

## relevant. ber 3, 1977. and whether the time limitations permit

FEA invites any person who has an it to be presented for answer. interest in the proposed rulem.aking is- 

## Any person who makes an oral 

## statesued today or who Is 

## a representative of ment and who wishes to ask a question


## a. group 

# 0'; cln.ss of persons that has an at thehearings may 

## submitthe question• interest, to 

## make 

## a. written request for in writing, to the presiding officer. The
an opportunity to make an oral presen- presiding officer. will 

## determine whether tation. Such 

## a. request should be directed the question Is 

## relevant, and whether to 

## the address Indicated at the beginning the time limitations permit it to be preof this 

## preamble and must be received sented. for answer. before 4:30 p.m., on October 21, 1977. Any 

## further procedural rules needed Such a request may be hand dcl1vered for the proper conduct of the hearings to such address, between the hours of will 

## be announced by the presiding om8:00 a.m. and4:30 p.m.,lI.ronday through cer.

_ Friday. A request should be labeled both A transcript of each hearing will 

## be
on the document and on the envelope made and theentire recordofeachhear,... "VenterHome HeatingEquipment--Pro- ing, Including the transcript. will 

## be reposed Test Procedures" or "Home Heat- tained by FEA and made available for Ing Equipment--Proposed Target", re- inspection at the FEA Freedom of InspectiveIy. formation Office, Room 2107. Federal

The person making the request should Bulldlng, 12th and Pennsylvania Avenue briefly describe the interest concerned; NW., Washington. D.C., between the if 

## appropriate, state why she or he Is 

## a. hours of 8:00 a.m. and 4:30 p.m

.. Monproper representative of a group or class day through Fnday. Any 

## person may ofpersons thathas such anInterest· and purchase a coPY, of the transcript from give a concise summary of the proposed the reporter. A- copy of NBS's recomoral presentation and a telephone num- mendations concernIng 

## test procedures ber where she or he may be contacted for vented. home heating equipment, and through November 2, 197.7. technical and economic papers relating

PEA will

## notify each person**select~d** 

## to 

## to the proposed efficiency improvement appear at the hearing before 4:30 p.m.. target will 

## be made available for**~c** 

## October 26, 1977. Eachperson se1ectoo 

## to tion at the FEA Freedom ofInformation be 

## heard must submit 50 copIes of her 

## Ollice.
or his 

## statement to 

## the address and by H. EntJironmental and Inj!crtionaT1} 

## the date given In the begInning of this 

### RetJfew. 

## preamble. In the event any 

## person wish- As 

## required by section 'ICc) (2) of the ing 

## to testify cannot meet the 50 copy Federal Energy Administration Act of requirment, alternative arrangements 1974 (Pub. L. 93-275). a; 

## copy of this 

## nocan be made with the Office of ResuIa- tlce has 

## been submitted to the Administions Management in advance of the 

## trator of the Environmental**Prot~tion** 

## hearing by so indicating in the letterre- Agency for his 

## comments concerningthe questing an oral presentation orby call- impact of this 

## proposal on the quality ing the Office of ResuIatlons Manage- of the environment. Tne Administrator ment at 202-254-3345. has 

## no comments. (b) Conduct

## 0/ Hearings. 

## FEA reserves The National Environmental Policy therIghttoselect thepersOns tobeheard Act of 1969 requires FEA to assess the at these hearings, to schedule their re- environmental impacts of any proposal spectlve presentations and to 

## estabUsh bytheAgency for "majorFederal actions the procedures governing the conduct of significantly affecting the quality of the the hearings. The length or each pres- human environment." Since test proce- entation may be limited, based on the dures under the conservation program number of persons requesting to 

## be for appliances will

## beused only to standheard. ardlze the measurement of energy usage

An FEA officIal will 

## be designated to and will 

## not affect the quantity or dIs

## preside at the hearings. These will 

## not trIbutlon of energy usage. FEA has debe judicial or evidentlnry-type hearings. termined that the action of prescribing Questions may be asked only by those test procedures, by itself. will 

## not result condUcting the hearings, and there will 

## in any 

## environmental impacts. On this 

## be no cross-examination of persons pre- basis, l"EA 

## has determined that. with

FEDERAL REGISTER, VOL. 42, NO. 169-WEDNESDAY, AUGUST 31, 1977

### 4393~ 

## respect to prescribing test procedures under the conservation program for ap- pliances, no environmental impact statementis required.

The proposal has been reviewed in ac- cordance with Executive Order 11821 as amended by Executive Order 11949, and OMB Circular No. A-107 and has been determined not' to be a major proposal requiring evaluation of its economic impactas provided for therein. ' (Energy Polley and Conservation Act, Pub. L. 94-163, as amended by Pub. L. 94-385; Federal Energy Administration Act of 1974, Pub. L. 93-276, 

### as amended byPub. L. 94-386; 

### E.O. 11790,39 FR. 23185.)



### In 

## consideration of the foregoing, it is 

## proposed to amend Chapter II 

## of Title 10, Code of Federal Regulations, as set forth below.

Issued in Washington, D.C., August 22, 1977.
ERIC 

### J. FYGI, 

### Acting General Counsel, Federal EnergyAdministration. 

## 1. Section 430.2 is amended by adding
a subparagraph (15) as part of the deflnition of "basic model" and by adding the definitions of "vented home heating equipment," "vented wall furnace," "vented floor furnace" "vented room heater" and, "direct

## ~ent system," to read as follows: ' § 

### 430.2 Definitions. 

# • 

# • • • • "Basic model" means all units of a

, given"type of covered product manUfactured by one manUfacturer and: 

# • • • • 

# • (15) With respect to furnaces, having the same primary energy source and es- sentially identical functional physical and electric characteristics. 

# • • • • • "Vented home heating eqUipment" or "vented heater" means a class of home heating equipment, not including furnaces, designed to furnish warmed air to the living space of a residence, directly from the device without duct connec- tions (except that boots not to exceed 10 inches beyond the casing may be per- mitted) and inclUdes: vented wall fur- 'nace, vented floor furnace, and vented
room heater.

"Vented wall fUrnace" means a selfcontained vented heater complete with grilles or the equivalent, designed for incorporation in orpermanent attachment to the structure of a residence and furnishing heated air circulated 'by gravity
or by 

# a: fan directly into the space to be heated through openings in 

## a casing.

"Vented floor furnace" means a selfcontained vented heater suspended from the floor of the space being heated, taking air for combustion from outside this space. The vented floor furnace supplies heated air circulated by gravity or by a fan directly into the space to be heated through openings inthecasing. '

"Vented room heater" means a self-**~ontained,** 

## free standing, nonrecessed; vented heater for furnishing warmed air' to the space in 

## which it is installed. The PROPOSED RULES



## vented room heater supplies heated air circulated by gravity or by a fan directly into the space to be heated through openings in 

## the casing without duct con- nections.

_

"Direct vent system" means a 

## system consisting of a vented heater and com- bustion air"and flue gas connections between the vented heater and the outside atmosphere, and constructed so that all air for combustion is obtained from the outside atmosphere and all flue gases are discharged to the outside atmosphere.

2. Section 430.22 is amended by adding paragraph (0), 

## to read as follows: § 

### 430.22 Test- Procedures for Measures of Energy Consumption.


# • • 

# • • • (0) 

### Vented, home heating equipment. 

## (1) The estimated annual operating cost for vented home heating -equipment shall be 

## the sum of: (i) 

## the product of the average annual fuel energy con- sumption in 

## Btu's per year, determined according to 4.7 of Appendix 0 

## of this subpart, and the representative aver- age unit cost in 

## dollars per Btu for gas or oil, as appropriate as provided by the Administrator plus (li) 

## the product of' the average annual auxiliary electric en- ergy consumption in 

## kilowatt-hours per year, determined according to 4.8 of Ap- pendix 0 

## of this subpart, and the representative average unit cost in dollars per kilowatt-hour as provided by the Administrator, the resulting sum then being rounded off to the nearest !follar per year. (2) "The annual fuel utilization efficiency for vented home heating equipment, expressed in percent, shall be the ratio of annual output of useful energy delivered to'the heated space to the an- nual fuel energy input to the vented heater determined according to 4.1.33 of Appendix 0 

## of this 

## subpart. (3) The estimated regional annual operating costs for vented home heating equipment computed for minimum and maximum standardized design heating 'requirements shallbe the sum of: (1) 

## the product of the regional annual fuel energy consumption for the minimum
or maximum standardized design heating requirement, as appropriate, in

## Btu's per year for gas or oil vented heaters determined according to 4.16 or 4.17 of Appendix 0 

## of this 

## subpart, and therepresentative average unit cost in 

## dollars per Btu for gas or oil, as appropriate, as provided by the Administrator plus (B) 

## the product of the regional annual auxiliary electrical energy consumption in 

## kilowatt-hourS per. year determined ac- cording to 4.18 or 4.19, as appropriate, of Appendix 0 

## of this subpart, and the representative average unit cost in dollars per kilowatt-hour as provided by the Administrator, the resulting sum thEm being rounded off to the nearest dollar per year. (4) The estimated l'egional annual operating cost for vented home heating equipment shall be the sum of: (t) 

## the product of the regional annual fuel en- ergy consumption in Btu's per year determined according to 4.10 of Appendix 

# "

o of this subpart, and the representative average unit cost in dollars per Btu for gas or oil, as appropriate, as provided by the Administrator plus (11) 

## the product of the regional auxillary electrical energy consumption in kilowatt-hours per year, determined according 

## to 4.11 of Appendix 0 

## of thJs subpart, and tho representative average unit cost in dollars per kilowatt-hour as provided by the Administrator, the resulting sum then being rounded off 

## to the nearest dollar per year.

(5) Other useful measures of energy consumption for vented home heating equipment shall be those measures of energy consumption which the Administrator determines are likely to assist
consumers in 

## making purchasing decisions and which are derived from the application of Appendix 0 

## of this subpart.

3. Section 430.23 is amended by adding a paragraph (0) 

## to read as follows: § 

### 430.23 Units to be tcstcd.



# .**~** 

# . 

# . . (0) 

### vented horne heating eqUipment. (1) 

## When testing 

## of vented home heating equipment is required for a measure or measures of energy consumption described in § 

## 430.22(0) of this subpart, a sample of sumcient size of each basIc model shall be tested 

## to ensure that, for each such measure of energy con- sumption, there is a 95 percent probabillty that the mean of the sample is within 5 percent of the true mean of such measures of the basic model, ex- cept that a minimum of 1 unit of each basic model shall be tested. (2) The sample selected for para- graph (0) (1) 

## of this section shall be a simple random sample drawn from the production stream of the basic model being tested. (3) A basic model having dual voltage ratings shall be separately tested at each design voltage such that the re- quirements of paragraph (0) 

### (1) 

## of this 

## section is sati$fled at each rating. 

# • 

# • • 

# • 

# •

APPENDIX 0-UNIrORlt TEST MF.TUOD rOR MtAsUm!lU

TUE ENERGY CONStIMl'TION orVENTF.D HOllE HEAT- ING EQUll'MENT

### l~O DEFINITIONS. 1.1 

### "Steady-stato conditions (or**v~nted** 

### homo**h~atlng** 

### equipment" means equlllbrium conditions In thof1uo or stack gos os Indicated by temperaturo ehangt:! 01 

### not more than pIns or mlnns 6° F (2.8" 0) In**thr~o succ~ss1va**  

### temperature readings taken 15 mlnutt:! apart.

1.2 "Fluo gBS€S" meall3 reaction products resulting (rom the combnstlon or a ruel with the**oxyg~n** 

### or tllo air, 

### Including theIncrts lind IIny l'Xcesslllr.

1.3 "Excess 1IIr" mcall3 IIIr wllloh P:lSSt:! through the combustion cllamber and the vented lleater f1ut:! In excess or that which Is**tlle~retlcllllY** 

### required ror complete combnstlon.

1.4. "Flue" means a conduit between tho f1uo outlet
or a vented heater through wlllch tllo f1uo gast:! pliS3 priortothe point Qr drolt rollel.

1.5 "Flue outlet" means tile opening provided In a vonted heater ror tile cxhanst 01 

### tho flue gast:! Irom tile combustion chamber.

1.6 "Fluelosses" mcans thosum olsenslblo lind latont heat losses above room tomporaturo (70' 

### F) or the flUe gasses 

### leaving a vented heater.

_

1.7 "Stack" means tho portion or tho oxhaust system downstream 01 

### the barometrlo draft regulator or Integral draft dlverter.

1.8 "Stack gs."Cs" means tho f1uo gases combined with dilution air that enters lit tho barometrlo draft regullitor or Intccral drolt**d1vert~r.**



### 1.9 "Barometric draft regulator" me!lll3 a meclulnlcal device designed tomlllntain a constllnt dratt In a vented lleater.

FEDERAL REGISTER, VOL. 42, NO. 169-WEDNESDAY, AUGUST 31, 19?7

## PROPOSED RULES

1.10 "Air shutter" means an adjustable deviro for varying the size of the primary air inlet(s) to the com- bustionchamber_ elbowshallbo coveredwithIr.oubUonh:lvlnc: 

### an It**~ue** ofnot less than 7 (OF-HR-Ft'JDtu) nod 

### an outer**b~'er** ofaluminum lolL

Tho tests !or mrosurlng**Ilu~** &OS tcmpcrot= 

### durin<: warmup nod cooldawn, nod for tho tlCldy ctnto te::t**~f** section3.1.1.3, shallbocondudtd**by~~** thefivoto· fiyo feet six Inch plJlO 01 tho prcvl= tnr...t;r:ll'h**~ith** II two frot vertical plpe. Tho j!lP3 shall bo CO\"rn:d ..-Ith Insulation h:J.ylng 

### an R volu\) of 

### not 10 th:ln 7 lOFliK-J,'t'JBtu)IImlnooul.ttbycrofalumlnl101ColL 1.11 "l'ower burner" means a burner whlch suppUes either gas or air 

### or both at pressures exceeding, fOr gas, thelinepressure, and for air, atmospheric pressaro, or n burnerwhlch depends on the draft mduced by n fan for properoperation. •

1.12 "Ventlimiter" means a device whlchlimits the flowofairfromtheatmosphericdiaphragmchamberofn gaspressure**~tor** tothe atmClSphere. A ventlimiter maybe a limiting orifice orotherllinlting device.

1.13 "Exhaust air intake 

### tennInal" means a deviro whlch is located on the ontside of a buUding and is connected to a vented heater by a system of vents. It is composed ofan airintake

### teriDlnal through whlchthe airfor combustianistakenfrom theilutside atmosphere, anda ventterminalfromwhlchfiue gases aredischarged:

.L14 "Indnced draft" means a method of drowing airinto the combustionchamber bymechnnIcal means.

1.15 "l'lenum" means an air compartment, that is attached to, or is an integral part of, a vented heater and whlch is designed to clther disti'ibutc the heated air after it leaves the heat exchanger in the 

### ca..'1l or n supplyplenum,orcollectstheairwhlchentersthereturn inlet in the case 0[ a retum plenum.

1.16 "Heat input" (Qi.) means the rate of energy supplied in a fuel to 

### a vented heater, operating under steady state conditions, expressed in Btu's per hour. It inclndes any input energy to the pilot llght and is obtained by multiplying the measured rate of fuel consumption by the measured hlgher he;J.ting volue of thefnel.

1.17 "Higher heating value" (lIHV) means the heat produced per unit of fnel when complete combustion takes place at constant 'pressure and the products of combustion are cooled to the initial temperature of the fuel and airandthe watervaporformed during ccmbnstion is condensed. The higher heating valne is usually expressed in Btu's per coble 

### foot for gaseons fuel, or Btu's pergallon for liquid fuel.

L18 "IIitegml draft diverte'C" 

### means a device which is anintegral part 0[ a**vent~.d** heater. which is desllOled to n) provide for tb"e exhaust of thl' prodncts of com- bustion in the eventofno draft.hack dmft. or**stoJl~e** beyondthe draft diverter. (2) prevent a back droit from enter1n!r the ventl'd heater. (3) neutralize the elIect of stack action ofthe chimneyor !!lIS vent upon the opera· tion ofa ventheater.

L19. "Vent damper" means a -device intended for installationintheexhaustsystem ofa ventedheater. nod whlch is desilOled to open the exhaust system when the ventedheaterisinoperation andtoclose oIItheexhAnst system when the vented heater is in a stand·by condition.

1.20 "Vent pips" means p=es and conduits In a direct vent system thromtb whlch gases pass from tho combustion cbambertothe ontdoorelr.**~**



### 1:21

- "Infiltration parameter" means that portion of unconditione4 ontside air drawn Into the hE'Sfed space as a consequence ofloss of conditioned air through the exhaust systemofa vented heater.

1.22 ''Vaporiziru: type oU burner" means a dAvlee consisting of an oU vapOrizing bowl or other recentA(\le into whlch liquid fuel oU may be fed in contrnU:ihle quantities;theheatofcombustionbeingusedtovapOrize thefuel, with provision for admittiM air and mlxlng It withthe oU vaporincombustibleproDtlrtions.

1.23 "Air tube" means a tube which carries- 

### com- bustion air from the fan 

### to the burner nozzle, for combustion.

2.0 TESTING CONDITIONS. 2.1 ImtallaDoo of Ted 

### unU•. 2.1.1 Vented Wall Furnaces fincluding direct vent systems). Gas fueled vented wall fnrnaces sholl be Installed for 

### test as specified in Sections 2.1.3 nod 2.1.4 of ANSI Z21.49-19i5. Gas fueled WIIll furnaces with direct vent systems shall be installed for 

### test as dl'SCrlbed In 2.1.2 and 2.1.4 of ANSI Z21.44-19i3. 

## on Ineled vented wall furnaces shall be installed as specified in UL-730- 1974, Section 33. OU fueled veuted wall furnaces with direct vent systems shall be installed as speclfied in UL-730-1974, section 34..

2.1.2 Vented Floor 

### Furnaces. Vented fioor f= shall be installed for 

### test as specified in Sections 35.1 2."l:2 UDS fueled vented homo hl!3Unt: Cilulpmtnt whlch docs not employ Intcc;rol drolt dl\"CIlCll\. 0:13 fueled vented homo l1e:lting c'lulSlmcnt ,.hIch**d.~** 

### not employ integral draft divcrter5 fh:lll bllvl.l II '

....0 

### Coot longinsuIatoo**plpent~hed** tothovcnlca1l)'dl:.:h:l:b1ng IlUD outlet for tho stl!3ily GillIG tcst nod tho 1= to
measuro llue temperature, durlng mlml-Ull nod**~l·** down. For 1lI1lts havIng n**hcm.ontall~· dl:~**  outlet, an elbow nod II two foot long vcrUt:Il 1n.."Ub!cd pipe shall bo nttccjled to tho outlet. :Allln..<nbUon rhnll**ha~e** 

### anR voluo n.;;t 10than7 fF-HR-FTJJBtu) nod 

### an outerbyerofaluminumfoil.

2.2.3 Oll.Fuclcd Vented IIomo III!3Ung Equlpnu:nt_ FluD connecUons for oil fueled vented IlWr f== shall bo spcclllcd 

### In**S~Uon** 3:i ot**UL-m-liJ1~.** s:eUon. 34..10 through 34..18 of UL-;:;:o..liJ1" far oU fuclc<l vented wall f= nod E«Uons sa.2 and UJ.3 of**U~llli3** for ventedroom heaters.

Thera shall bo no oP".nInt: on tim oU**~ter** 

### bet

....ccn tho heater and thD point whero tim 

### fino &C3 r:unp!.:l is 10 be tuken or thD fiJlO gas tcmpernturo

### Is to bo nm..'11rol. U n barometric dralt ry;uliitor 

### Is**I~roted** In tim heater, It shall bore:lled ourIng

# on tc:ts.

2.2.4 Direct Vent Syrtelll!!. Tho cxh:lu.,<t!alr Inllll:o S}'Stem suppUed by tho**mnnu~turer** 

### 5hall 00 In 

### P1:.:o durIng all tests. A vented hl!3ler**cmP!O~in;** n direct vent system shall DDt be connected 

### to n 

### cli1mncy or InduCed drolt 

# £0=, bnt 

### Ehall depend far venthl;; 

# or tho gas solely on the providon**~r** ventIng**ln~rJroI'atc:--J** inthehl!3ter andtho

### CJ.hanstfnirintnko

### 5l1Stcm ruppUcd witb it. Onunlts whlch !lIil not de!!i:IW1 to**pr~hl!3t** tho incomingalr, thofllst 181nche3 ofventnlpo do=t= of the hl!3tor outlet 

### Eh:ll1 bo In..''1lblcd \,ith n brer or InsuIntion having 

### an R volU6 Cir 7 fF-nR-FTllBtu) and tho insubtlon

### Dllltcrln1 covered by n byeroralumlnumfoll.

2.3 

### Full Suppg. 2.3.1 Nlltuml Oos. For n vented hl!3ter uUlWng nuturol gas, malntllin tho gas rupply to tho 

### unIt under test at 11 normal Inlet 

### test pr=a tmmedlnlel>'**~** 01 allcontrols at7 to 10 1nclie3 watercolumn. 'Iho rt';:UInter outlet pr=ro at normal tcst pr=ro [hall 

### to opproximntely that rCUlmmcudcd by tho manu1:::turer. \.Iso naturol 

### COS having**Ilsp.~Ulc** gradt)'of**op~ruDt!nt~** ly 0.6 and n hlgher hl!3Ung voluo ..-Ithln**:!:~~** of ICC:; litu per standilrd cub!lI 

### toot. Detmnlno tho**~hol ~her**  hl!3tiug voluo 

### In Btu's per Wln!l:lrd cub!o root for tho nutunil gas to ba used 

### li1 tho test with an error 

### no greater than oUG pcIttIlt.

2.3.2 l'ropana Oas, Forn VCllted hl!3ter utl1Wnc: pr0- pane 

### gas, malntllintho gas rurPlY totheunltundO'

### Icst at 11 norrilallulet pr=ro01 1 10 13inehes \oiltercolumn and 11 

### speclllc gravity01 LL:i. Tho RilUbtCir**Gutl~t** 

### pro- sure atnormaltestpr=roWallbe**opproxlm.a!el~·lh:J.t.** 1"eOlmmended bythomnntW.cturcr. l)!C

## FEIt.lUO**bll~** n speclJ!c gravity of**Dprrox1motcl~'** loW and n hl;:her healing vllluo withln :!:

...**~** of 2:00 Dtu's 

### pu Wln!l:lrd cub!n foot. Dctcrmlno tho cttWll hlgher lil!3t1no; value in Dtu's per stand:ird cublc 

### foot rar tho propane to 110 usedin

### tho testwithanerrorno grC3ttrthan**on~** JlUe<nt.

2.3.3 Other Test Gas. Tho cll:lre.etcrL'1les o( other test I:tlSeS shall bo malntaln,d 

### os dc:a1t."d In S.:IIc;n 2.2, 'J.'nblo VU, or ANSI Standard**Z2Lll.l-lIi1~.** Thclr mca..<ured hIgher hc:lUng valua th.:lll 

### too within**,g~** 

# or tho volues sPec1llcd In thoobovoANSIslnod:ird.

2.3.4 

### 011 Supply. For n vented hl!3ter uUIWn,; fnel oU, thefuel

### all typoused

### thnllbeNo.l!al1l

### 011 rorv:lpum. lng typo 

### burners and 

### as rpcctllcd by tho =nb:tlmr for meehanlcalotomldng**t)~** bu:rncr.l. Tho No.1 fael oU viscosity shallbo as spCdllcdfn UL-Wl-llin,**&~tll;n** 

### 36.9. ThoFPeclIlI!3Uon 01otherfael

### oils fhall

### ba

### os dl!llntd in ANSIZll.z03-1iJ10.

The hlgher hl!3tlog voluo of tho to fuclllll 

### th:lU 1:0 .measured withun error no grc:\ter than ono pcrcalt.

## ~~h~~~~~~l~tion shall be 

### 2.3.5 Elei:trlcal Supply. For 

### an aw:\ll:lry**clre!rl~** component of 11 vented hl!3ter, malntalu tho**~trlc:Jl** supply to tho testunlt withln ono pa:c-U1t**~I** tho mml:lp11ite voltaso for tho cnUto portlon of tho tc..'t 

## creW. U
s vollllgo range is**~ ~r**  mmepbto**v(lltc;:~,** malntn'n the electrlcal rupply withln 

### one**~nt** of tho center oftho mmeplllto voltaso rtlDgtl. msde insccordance withmanufacturer's !nsI:rnctions.

2.2 Flue and Stack**~ufrtmenU.** . 2.2.1 Gas fueled vented home heating equipment employ(ng integral draft diverters.

Forthesteadystateperlormanro

### test described below, gas fueled vented home heating equipment employing integral draft diverters with vertically dlschari;!ng out- lets shallhave attachedto and vertically abovetho.outlet, a stackhaving a cllameterthe same size 

### as the outlet and shall be covered withinsulation having an R volue ofnot less than 7 C"F-HR-Ftt/Btu) and an outer layer ofaluminum foU. The stack shall extend notless than 5 feetnormore thanfive feet six inches above thehlghl'St pointoUheoutlet.Vented heaters having a hortzontally

,. ilischarging outlet shall have attached an insulated DO

degree elbow. the same size asthe outlet, and sufficient vertical insulatedblackiron pips so that the pipe outlet isnotlessthanfive feet normorethanfive feetsix Inches " abovethehlghest pointoftheheater outlet. A hortzonbl

. section ofpipsmaybeused onthefioor furnace between

the diverter and the elbow if necessary to clear any framingusedintheinstallation.Thelengthofthlssection of pipe shall be the minimum needed. The stack and 2.4 BwnuMJutlt:ltTlu. 2.4.1 Gas BurnerAdjustments. Bumcro o(gasrackd vented heatersWall be Ddjusttd to thelr ll'i:lXlfuum DIU ratings at normDl tcs\**~.** 

### AU ruclI 

### odlustmcnt!l shall bo within :!:2 percent or tho lwurly Dtu mUn;: spccUled by tho mnnubdurer as me:l.'"lIlcd afler 15 minutesolopcmUonstnrting withallr0rt5ortho r= nt room temperature. Tho prfm:lrl' 

### air mutters 

### Ehall bo set Cor proper combustion, or 

### os dctermlnrd by =u· tacturer's recommendaUon, and tho burntr Input flop" rate shall bo corre<:tcd to st:utlhrd cunditlollS 01 

### UP F and30 Inches mercuryb:lromctric pr=.

Un ventl!mlling

# = Is provided on n gas

### Jll'= regulutor, It shalllXlinpI=durlngalltcsts.

"l.4.2 

### 011 Burner Adjustments. Tho burner.! of 

### 011 fueled vented he:ltcro**~h:lll** bo adjusted to 5:1\"0 the best CO.reading andn hourly Btuinpu.t. durin;: tho sle:::dystllto perfo= tcst**d~t."d** M!o

....**\~hlcll** is wlthln plus or mlnns 2 perttIlt of thll heater =u!::tturu'.5

FEDERAL REGISTER, 

### VOL 42, 

### NO. 169-WEDNESDAY, AUGUST 31, 1977 

# 43935

## 43936

3.1.1 Oas Fueled Vented Home Heating Equipment (not Included dlrect vent systems).

3.1.1.1 Stack Oas Temperature and CO. Measure- ments. The vented heater shall be setup as specified In sections 2.1. 2.2. and 2.3. Begin the steady-state perform-
ance test by operating theburner and thecirculating air blower withtheadjustmentsspecifiedIn2.4 and2.5 until
a steady-state temperature Is attainedin the stackgas as measured by the center thermocouple located in the 5 Coot stack as specified In 2.6.1 Cor uuits employing Integral draft dlverters.

On nults emplOying Integral draft dlvertars record

, the steady-state stack gas temperature (T

..... •).Measure

a samplo oC dry stack gasses Cor CO" (Xeo"s) in the plane oC measuroment used Cor measuringfiue gas tem- perature In accordanco with ANSI Z21-48-1976. section 2.1.2.}. Z21-49-1975 section 2.1.2.• Z21-11-1976 section 2.8. and ,,21-44-1973 section 2.1.1. Measure heat Input rate (Qlo) includlng the pilot Input and the e1ectrlcal power input lit steady-state condltlons and record.

The steady-state heat Input rate (Qlo) Includlng pilot gas shall be dotermined by muitlplying the m=red higher heating value oC the test gas by**~he** steady-state gas Input rato corrected to standard condltlons oC 60° F and30Inches oCmorcury. Measure gasinputtemperature and pressure at the meter and the barometric pressure. Correct themetered gas fiow rateto standard condltlons oC 60° F and 30 Inches mercury.

-

Measure tho steady-state electric power to the circulating air blowor (BE) and to the power burner (PE)
on units so equipped and record the data.

3.1.1.2 Fluo Oas Tomperature and CO. Measure- ments. ACter tho above test measurements have been completed on nults employing Integral draft-dlverters. the 5 to 5l-i Coot long bltick Iron pipe used In the steadv state test shall be removed. the draft dlverter relief opening shall be blocked and a 2 Coot leru;th of pipe Installed as described In section2.2.1. A singlebead-tyoe thermocouple not lnrJ(er than No. 24 AW0 shall be located In the center of tlio fiue pipe and 12 Inches from its top. After equilibrium condltions are again achieved.
as Indlcated by changes In the fiue gas temperature of notmore than 5° F (2.8' C) betweenreadlngs 15 minutes apart. the steady-state fiue gas temperature (Tp

... ) Shall be measured using this single thermocouple and a sample ofthe fiue gases shall betaken inthe same nlane of measurement. The sample of the fllle gases .shall bA analyzed Ul deterrulne the concentration by volume of CO. (Xeo•.p)**pres~nt** in the dry fiue gas. , ,

Onnultsnotemploying anintegral draft dlverter. the stcady-state fiue gas temperature shall be measured In the 2 Coot long fiue pipe as described In Section 2.6 and
a sample of the flue gas shall bo taken In the plane of measuroment. Tho sample offlue gases shallbeanalyzed to deterrulnetho concentrationofCO" (Xeo•. pl. present In tho dry flue gas.

-

3.1.2 Vonted Wall Furnaces with Direct Vent Sys- tems. Tho vented heater shaIl bo set up and adjusted as specified In sections 2.1. 2.2.4, 2.3. 2.4. 2.5 and 2.6. FIue temperaturo (Tp

... ) and CO. (X eo.,p) measurements shall bo performed at steady-state conditions as pre- scribed In 3.1.1. -with tho following exception:

Tomperature measurements shall be made at a locationWhich Is deterrulned bythe design provisions of the vented heater for preheating the InCllmlru: air as pre- scribed In section 2.6.3 for**tMrm~couple** location.

3.1.3 011 Fueled Vented Home**HC!\tin~** EqulDment (not Including direct vent**systE!m~).** The vented heater shalI bo set up and adjusted as specified In sections 2:1, 2.2.3 and 2.3.4. Begin the steady-stste**Derform~nce** 

### test by operating the burner and the circulatlnl!; air blower with the adjustments specified by 2.4.2 and 2Ji.1. When steady-itate temperature (T;

... ) Is attained In the flue gas, measUre theaverage fiue gas temoerature and mea"
uro C02 (Xeo••p) In a sample of the flue gas at the location described In figure 37.4 of UL Std. 896. There shall be no opeuing between the heater and.the oolnt Where the fiue gas sample Is to be measured. If a barometric draft regulator Is Incorporated In the heater. It shallbo sealed during alItests.

Measure and record the steady-state heat Input rate (Qto). Measure steady-state electrical power to the air blower (BE) and 

### to tho power burner (PE land record these data.

3.2 Flue Temperature lIfeMuremenU-CoolDown Tal. 3.2.1 Vented Home Heating Equipment (not IncludIng'direct vent dystems). After steady-state testing Is completed, all units shall have tho main burner turned oII and tho fiue gas temperature measured at 1.5 (Tp.OFFC'a» and 9.0 (Tp.OFFC"I) minutes after the bumer shuts 01I. Units employing stack dampers shall have tho damper control by-passed so that the damper remains open during the cool down test. During this olI-period theIndoor 

### air circulatingblower shalIbemade to operate during the first thrceminutes ofthe offperiod and shall then be turned off uniess tho vented heater employs a single motor to drive a power burner and an Indoor aircirculating blower In which case beth shalI be turned oII t6gether. Themainburner(s) shall remain oII until equilibrium condltions are attained. as Indleated bl,**tem~eraturo** changes In tho flue gas ofnotmore thall' 3 F (2.8 C) betwecnreadlngs 15 minutesapart. Foruuits employing a contlnuonsly burning piiot light, a third fluo gas temperaturameasurement shrut thenbemadeto detefmlno tho olI·period mlulmum fiue gas temperature (Tp. OFFC"'». For uuits not employing a continuously burning pilot light, Tp. OFFC"') IS assumed toequal.70'F (21.1°C). During this cool down test. the energy Input 

## PROPOSED RU[ES

ratetothepilotlight (Q.),Uthenultisso equipped, shall 

### also be measured to within an accuracy of ::3%. Record

# ~~~::~d'~~e Hcating Equipment with Direct Vent Systems. After steady-stato testing has becn com- pleted, turn the main burner oil and measure the fiue gas temperatureat 1.5 (Tp. OFFII:» and9.0 (Tp. OFFC,,» minutes after theburnerIs shutoffusing ninebead-type tnermocouples. notlarger than 24 AW0 ,In thelocations preocrlbed in section :1.6.3. During this off-period. the tndoor lUI' circulating blower shall bo made to operate dunngtheJlrst. 3 minutes ofthe off-period and shall then De shut off uuless the vented heater employs a single motor 

### to drive a power burner and an Indoor air circuisIng blower. In which case both shall be turned off. The miiln ourner(s) shall remain off until equilibrium con- ditions are attained. as Indleated by changes In the fiuo gas temperature of not morO' than 3°F (2.8'C) between rcadlngS 15 minutes apart. For uuits employing a con- tlnouslyburningpilotlight. a third Ilue gas temperature measurement shall'then be made 

### to detorrulne the offperiodminlImunfiuegastempcrature (Tp.OFF**~"'»'** For unlts'not employing a continuously burnin§ pilot IIllht (Tp.OFF. Co») Isassumed

### to equal70°F (21.1 C). Dunng this cool down test! the energy Input rate to tho pilot Ught (Q.) IftheurutIs so equipned, shall also be meas- ured to wiiwn anaccuracy of ::3%. Record allmeasured values. If a vented heater with a direet vent system employs an automatic stack damper. it shall be closed during this cool downtest.

3.3 Flue Gru Temperature MeMurement& Heal Up Tatfor Venud Home Heatlnu Equipment. After equlIlbrium condltlons are achieved following the cooldown teSt and the required measurements performed. the vented heater shall be turned on and the fiue gas tem- perature measured at the locations specified in section 3.:.l ofthisAppendix. at0.5 (Tp. ol«n) and2.5 (T,. ONC") minutes after the main burner(s) comes on. The Indoor air circulating fan shall remain ,off during the first 1.5 minutesofthIS warmuptest andshallthenbeturned on nuless the ventedheater employs a single motorto drive
a power burner and an Indoor atr circUlating blower, In wblch case both shall be started together. Record the measured temperatures. Vaporizing type 011 burners neednothavethistestperformed.

3.4 Jacket Lo&& MeMurement. A jacket loss test Is specified oniy for vented fioor furnaces. Measure the**jacke~** loss (Li) In accordance wlth'the ANSI standard Z21.48-1976 Section 2.12. and record the totaljacketloSS andtheambientroomtemperatureduringthe**~est.**

3.5 Mroaurement for Determining Ejfedu:ene&& of Automatic Stack Damper. The effectiveness of an auto- matic stack damper (D.). In ventedheaters so equipped! shall be determined by measuring tho cross sectiona
area of the stack (As). the net area of the damper plate (AD) (the area ofthe damper plate minus the area of any holes In the plate). and tho angle n which is the angle the damper plate makes when closed with a plane perpendlcular to the axis of tho stack. The equation In section4.2 Is thenemployed to calculate D •.

3.6 lIftlUurement for Determining Dp for SV61tm& Equipped with Power Burner&. Onpowerburner systems notemploying automaticstackdampersorpower burner systems with a stack damper and an Integral draft dlverter, tho fiue gas temperaturo during the off-period (Tp OFF) may be measured during the cool-down test desCribed In section 3.2. The procedures to be used for measuring (Tp. OFF) aredescribedbelow.

On systems equipped with both power burners and stack dampers, and not employing an Integral draft dlverter Dp (the ratio of the rate of fiue gas mass flow through'the vented heater during tho olI-period to the rate of fiue gas mass flow**throu~h** the vented heater duringtheon·perlod) shallbemensuredduringa separate cool-down test. This separate cool-down test shrut be conducted after the warm·up toot described In Section 3.3 f6r deterrulning the on-period fiue gas temperature. It shall be conducted by letting the unit run ruter the warm-up test Is completed until steady-state conditions
are reached as Indlcated by temperaturo changes In the fiue gas or 'not more than plus or minus 5' F (2.8' C) between readings 15 minutes apart, and then shutting the nult off with the stack damper controls by-passed or adjusted so that the stack damper remains open dnrlng theresulting cool-down period. Ifa draftwasmalntelned In the fiue during the steady state performance test described in Section 3.1 the SlIme draft (within :1:0.01 Inches of water gauge of the average valuo meausre duringthesteady-ststetests) shalIbemaintained during this cool-down period.

.

The fiuo gas mass flow rato dunng the off-period (mP'. OFF} may be measured at a specific off·perlod flue**~** temperature andthencorrectedto obtainIts value at
a fiue gas temperature at steady-state (Tp.ss), USing the procedure described below.

Within oneminute afterthenult Is shut01I to start the cool d()wn testfor determining DP'. beginfeedlng a tracer gas into the combustion chamber at a constant fiow**r~te** of 

### V r and at a point which will allow for the best pos- Sible 

## ID!x1ng with the air fiowing through the chamber. Onunits equipped with an 011 fueled power burner. the bestloeatlonfor Injecting this

### trar..er Ilas Is through a hole drilled In the airtube. The value ofVr shall be perlodl cally measured with an InstanteneOnsly readlng fiow meterhaving an accuracy of ::3 percent ofthe quantity measured and shall be less than 1 percent ofthe air flow rate through the vented heater. If a combustible tracer gas Is used. there should be a delay period between the tlmo'tbo nult Is shut oII and the time the

### trac~r gas

### I~ first injected to prevent Ignition ofthe trllC(lr gas,

Between 5 and 6 minutes after tho nult Is shut oil to start the cool-down test. the percent volumetrlo conelln. tration oC tracer gas, Cr, in tho flue gas andtho fluo gM temperature. Tp.o,,., shalI be mcasured In tho centor

### 01 thelIue plpoonthe ventedheater sideofthe draftrrguill. tor and not more than 121nchllS from tho heater flue-gas outlet. In addition, the barometric pressure, 

### P D, shall also ho determined. A single bead·type thermocouple, not larger than No. 24 AWO shall bo used to make tho temperaturemlllSurll1llent. Tho concentration of trac()r gas shall bo obtained using an instrument whloh will result In an accurllOY of ::2 peroont In the valuo ot 

### Ct measured andmay be either a batch or continuous rend. ngtypeInstrument. Ifthesampling arrangement for tho IInstrument results in a delay time betw('{ln the drawing of a samplo and Its analysis. this delay shOUld be taken Into account so that tho temperature**mcasurem~nt** lind the measurement of traccr gas concentraUon coincide.

Tho rate of tho fiue gas mass fiow through tho ventcd heater and tho factors Dp. D,. and Ds aro CalCUlated by the equations In sections 4.3.1. 4.3.2 and 4.3.3 of thl9

# A~~::mg~LCULATION OF DERIVED RESULTS FROM TEST MEASUREMENTS.

4.1 Ann'llat Fuel Utilization Efficlencv/or (fat or OU 

### Vented Home lIeatlng Equlpmtnl:'rho following ealUcl[\. tlons are to be performed to deterrulne tho anllual fuol utilization efficiency of gas or 011 vented home helltlng equipment. Figure 10 provldcs anlilnstratlon

## Or II work. slieet which may bo used to tabulato the resuits oC trot measurements and calculations.

4.1.1 Systom number. Determine tho systemnumbor for the**t~** ofvented heater being tested itlllCcordanco

## wll.i.ia~tfo°roI· combustlon air mass flow mto to stoichlometrlo air mass flow mte. Determlno the 'mtiD of combustion aIr mass flow mte to stelchiometrlo air, IIlllS3 flow mte. Rr.,.. from Figure 1 Cor the test fuel, by using tho value of dry fluo gas CO, concentration, Xeo•• p. deterrulned In accordanco with**~tlon** 3.1 

### 01 this Appendix,

4.1.3 Ratio of combustion and relief air mass How rate to stolehlometrlc air mass lIow rate. For sfstolUS 1. 2, 5. or 6, emploYIng an Integral draft dlvertcr. dnter. mlno tho mtio of tho sum of combustion and uit'ef air
mass flow rate to stoichiometric air mass flow mto Rl',s. from FIgure 1 for thotypo oftcst fuel, by using the value of dry stack gas CO. conoontmtlon. Xco •.8. detorrulntxl In accordance with section 3.1 of thIs Appondlx.

4.1.4 Average sensible heat loss at full·load stclldy stote**o~t1on.** For systems 1. 2. 5, or 0, emPloylngball Integral draft dlverter, detemilne tho average sensl 

### 10 heat loss at Cull-load steadY-Gtato opemtlon,**L~J1iJ.A,** expressed as a percent, from Flguro 2 using tile value of Rr.s deterrulned in 4.1.3. the typo of test fuel. alld <1 Ts.BS. whera


### il 

### T8,IJ8= T8, 88.

## x-70, where

Ts.BS x=measurcd stack gas tompemture at Cull·load

. steady·state operation deterralned III IItlo cordance with section 3.1 of this Appendlx, In degrees Fahrenheit 70 =assumed Indoor avemge condItioned air temperature in degrees FahrelUlolt For systems 3. 4, or. 7 through 12. dotermlno tho avorago sensible heat loss at fnlI·load stcadY-Gtete operation, Ls.BS A, expressed as a pereent: Crom l!'lguro 2 using tllo valuo of Rr.p deterrulned in 4.1.2. tho typo of test Cuol, and <1Tp.BS. whero 

### il 

## T,. 88= 

## T" 88-70 whero

T, S3",fluo gas tempemturo at full·load stMdy-stalo

• operationdeterrulnedInaccordancowlth scctiOIl 3.1 of this Appendix. In degrtllS Fahrenheit. 70 =as defined above 4.1.5 SteadY-Gtato efficiency. Calcuiato the stcadY· stato-efficlency (excluding Jacket loss). QS3, expressed In percent nnd defined as • 

## 'lss=100-LL,A-48. 88.

## A where '

Lr. A =average latent hellt loss 

## ot tho test Cuol doler·

. minedInaccordance with Tablo 3.111 poreollt. Ls.BS A "'as defined In 4.1.4. 4.1.6 •Avemgo mtio of stack gas mass flow mto to fluo gas mass flow rate at full·load stcady-stato operation. Determine the averago mtio of stack gas nIII.."3 fiow rate 

### to fiuegas mass /low mto at Cull·load steadY-Gtato operation. 

### Sf,. from Table 1 or 2 for tho system nwnber 

### to be tested.

.

4.1.7 Equivalent lleld stack gM temperaturo at Cull· load steady-state operation. Calculato tho equivalent field stack gas temperature at full·load stcadY-Gtato operation, Ts.BS. Qxprc-'SCd ill degrecs l!'lIhroullolt and defined as:

where 

### 1

- 

### T8, 

### 88=

## 8/, [T" 

### 88-70]+701

Tp; 85 as defined In 4.1.4 70 as defined In 4.1.4 SIp as defined In U.G 4.1.8 On-cyclo time constant. Calculato tho on-cycl**~** ·tlme constant, r••• exprcssed 

### In minutes and dollncd as·

FEDERAL REGISTER, VOL. 42, NO. 169-WEDNESDAY, AUGUST 31, 1977where

II =0.5minutes I, =2.5minutes Tp'. o'Cfl)=flue gas temperature measured at time (tl) from a cold start-up of the system burner determined in accordance with section 3.3 of thi$ Appendix, in degrees Fahrenhelt Tp', 

### o. (,.)=flue gas temperature measured atthe time (I,) from a cold start-up or the system burner determined in accordance with**~~~i** of thi$ Appendix. in degrees Tp',J;3 =asdellnedin4.1.4 For vaporizing type oil burners.Too= O.

4.1.9 Efiectivegastemperature dltrerence at start-up.

. Calculatethe etIectiveflue gas temperature dltrerence at

start-up or the system burner, 

### ap',o,x, expressed In ,degrees Fehrenheit and defined as: 

## ...!!.. 9.1". o. 

### z=[T,. ss-T,. Oll(tl)] 

### e To • where:

Tp', ss as defined in4.1.4 Tp'.o.Clt> as defined in4.1.8 It as defined In4.1.8
o. as defined in4.1.8 Forvaporizing type oilburner.;, ap'. 0, r=O.

4.1-10 OtI-eycle time constant. Calculatethe ofI-cycle tlnieconstant,Tolt, expressed In minutes and defineq as 

### l,-[a TOFF 

### [ TF. OFF (131- 

### TF •OFF ("')] 

## In T F•

# OFI!(,~)-T,. OFF(",)
where
1,=1.5minutes 1,=9.0minntes TF.OWC.,)=fiue gas temperature measured at time

, (I,) after shut-down from ste.?dy-sUlte

operation or the system burner determined in accordance with section 3.2 or this Appendix, in degree Fahrenhelt 

### TF. OPTc.,)=fiue gas temperature measured at timo

! (Ii) after shut-down from steady-stnte operation or the system burner determined in accordance with se<:tion 3.2 or this Appendix, in degree Fehrenhelt. 4.1.11 EtIective flue gas temperature dltrerence at shut-down. Calculate the efiective fiue gas temperature dltrerence at shut-down or the system burner, "'F. o.

### x. expressed In degrees Fehrenheltand defined as: 

## .lL

'1£'.1". O. 

### Z=TF. OFF(ta)

# -T,. OFF( 

### Q») 

### e TOF7

where

TF. OFFU,) as defuied in4.L10 TF. olt(=) 

### as defined In4.1-10 b 

### as defined In4.1;10
Toll as defined in4.1-10

4.1.12 MinImumfiuegastemperaturedltrerenceabove
room temperature. Calculate the minimum fluo gas temperature dltrerence above room temperature, 

# "'P.

=. :c, expressed in Fehrenheitand defined as:

where 

### '1£'.1". 

# =. Z=TF, OFF( 

### Q») 

### -70,

Tp'.ow('?) as definedln4.L10 70 

### as defined In4.1.4

4.1.13 MinImum stack: gas temperature dltrerence aboveroom temperature. Calculate the minimumstack: gas temperature dltrerence above room temperature, 

# "'s.
=.r expressed in degrees Fehrenheit and defined 

### ns:

For systemsnumbered 14

where 

### 'l£'s.",.z (D F ) 

### ('I£'F.co.Z) 

### (Sf,) (Ds)
Dp=otI-eycle flue gas draft factor selreted from Table I, for units with powerburner.; where Dp' is.measured. determined in accordance with section4.4.2 ofthisAppendix,lndegrees Fehrenheit. Ds=otI-eycle stack: gas draft factor selreted from Table I, or, for units with power burners where D p ismeasured, determinedin accord-

ance with section 4.4.3 of this Appendix, In degrees Fehrenheit. 

### S/p=as defined in4.1.6 ..,p.",.r=as defined in4.1.52 for systems**numbered~:** 

## PROPOSED RULES

whcro 

### 'l£'s.c>.x='I£".o.x

"'P.",.1r 113 dcDncd In U.12

4.1.14 EfIccUvo stllrk gas temperatura dlfr= at shut-down. Calculato tho dTctUvO sUcl;gas**ttm~turo** difference at shut-down. ';1I.o.r ap:=d In**d~** Fehrenhelt and defined 

### as: (or systemsnumbered 1-1: 

### (D,) 

### (-I", 

### o. x) 'l£'s. 

### o. x (Sir) (Ds)**,~here** IIp' 113 definOO In ·U.13 V'P'.o.r 113 dc1lncd In4.1.11 SIp' 113 defined In4.1.13 Ds 113 defined In4.1.13 (orsystemsnumbered li-8:

where 

### 'l£'s. 

## o. x

# ='1£',. o. x



# '1£',. o. x as defined 

### in 4.1.11

4.1.15 CorrecUon fnttors for cU=t 

### vcut 

### m'.ons. Calculnto n correction !It:tor whlch**co~1s** for lho**~** of outdoor air (or combusUon Instc:>d (if air nt room tempemture, Cs, definOO 113 

### (70-42)71SS Os=l+ 

### (T,. 

### ss-70) 100 where • : 42 "'nvcrogu outdoor tempcroturo rom'Sll'lllding to

• roJO de;:rca day**~Uon,1n ~**  Fahrenhdt flu 113 dellnCil.ln

## -u.s Tp' 113 defined In4.1.4. 70 asdefinedln4.1.4 The correcUon fuctor whlch rorrecls for tho dTcct 

### Cif outdoor air 

### =In!: thm1l&h thll hc:lt**l'X~scr** dwing the oft-period, C'II,-defined 113: • 

### O's=1.22

4.1.16 MulUpUc:lUon {odor for t.cnslblG hc:lt 1= duringburneron-cyclc. Caltubton mulUpUc:lt!on !It:tor (or sensible hc:lt lO!S dwing bumcr**on-cr~,** 

### KII..".' defined 113: 

## Ks• oll Where 

### 100 Op[l+(R T.,) 

### (AJ,)1 HHV",

01'",0.2-1 Btu**pcrpound~** Fnhrwhdt,f{lCclIlG hC3t 

### otair

### ns defined 

### m 4.1.2 Rr.r I 

### .A/p'cstolchlomctrlc air/iud mUo dctwnln.<'d In nccordnnca with 'l'llblG 3 HHV.&onvcrogu hls:hcr hc:lUng valua (it tho test 

### CUd determined In 

### ncco:dnnto 'IVIth TnblG 3, In Btu's per pound. 4.1.17 MultlpUe:lUon !w:tor !orumlblG 

### hot 

### 1=duro Ing burnerofI-cycla. Cokul:lto n mulUjlllesUon!lt:tor

### tar senslblohc:ltloSs duringburner(ift-crw,KII.OFF, dc!llw1
as: (or systems numbered 1-1: 

### (T,.**ss+460)1.1~** 

### (D,) 

### (Ks. 00) KS.OFF 

### (T,.ss-70)0.:.3

where 

### 4W c convcrslon !It:tor to 

### convert dC<;l'CO 

### FIlhrcn· heltto**d~** RnnJ.:!n!l Tp',ss 113 defined In4.1.4

;0 113 defined In4.1.4 Dp' 113 defined In4.1.13 

### KII,.. 113 dc1lncd In4.1.10 (or systems numberedlhS:



### K - (Ts. ss+460)I.n (Ds) (Sf,) (Ks. 

## col

S.OFF- 

### (Ts. ss-42)o.!) where



# TSi:**~=~ti:h**

SIp' 113 defined in4.1.0 

### .!i.3,.,. 113 defined In4.1.10

4GO 113 defined In4.1.17 42 113 defined In4.1.15 for systems numbered 9-12: 

### (Ts.**ss+460)1.1~** 

### (D,) 

### (Ks.o) KS.OFF 

### (Te, ss-42)o.!,

where



### Ts, &S 113 

### dc1lncd In4.L7 

### .D, 113 defined In4.1.13 

### KII, c. 113 dc1lncd In4.1.10 4GO 113 defined In4.1.17 42 113 dellned.ln4.1.15 

### 4.1.18 MultlpUe:lUon£lctor tarInWtmU!!n 

### 1=during burner on-cycli). Calculato n mulUpJlt:ltIan !It:tor (ar InWtmUon 

### loss dWing burner**on~,** 

### KI.**e~,** dcllIL.-d 113: {or systemsnumbc:cd 

### 1-18:'


## Kr. o,,=(il>)(S/,)(Ko. 0) 

## 43937

(loo/Toa)**~** 

### (toll/Toft)

lormtCI113 numbered 1-8: 

### 9,.0=9,.o.x

!ormtemsnmnbtred9-12:

\7hm 

# 9,. 0=

### (Os) (9,.o.z) (tOo/TOO)

# >(toll/ToU) ;
tars;skm:lnumbered 1-8:

( tolf) 

### 9,,0=9,.0.% 

### l-e Tolf

for 5YSt=nmnbcred 9-12: 

# ( 1011) 8'.0=(00) (9,.0. x 

### 1-e Tolf



### (to:;./Tc:» (loU/Toft)

for 5YStems ntmlbered 1-8:


### 'I£',..o='I£".O.x

!ors;stCI113 nwnbered9-12: 

# '1£',. 0=

### (O's)('l',. O. 

### x)

FEDERAL REGISTER, 

### VOL 42, 

### NO. 169-WEDNESDAY. AUGUST 31, 1977

I

## 43938

as defined In 4.1.20
as defined In4.1.21
as defined In 4.1.11
as defined In 4.1.15

4.1.24 Effective minimum flue gas temperature dif- terence above room temperature. corrected for burner cycling effect. Calculate the effective minimum flue gas tempereture difference above room tempemture

.....,."'. corrected for burner cycling effcet. expressed In degrees Fahrenheit and defined as:

.
tor systems numbered 1-8:


### 'lIF•

..

# = 'lIF,

... X

tor systems numbered 9-12:


### 'lIF

... =(Cs) ('lIF

....x)

where

C'8 

### as defined In4.1.15

, '1'1'

....% 

### as defined In4.1.12 4.1.25 Effectlvo stack gas tempemture difference at burner shut-down. corrected for burner cycling effect. Calculate tho effective stack gas temperature dilJerence atburner shut-down. corrected for burner cycling effect. "'s.o, expressed In drgrees Fahrenheit and defined 

### as:
when

for systems numbered 1-8:

• (to.) 

### 'lis. 0= 

### 'lis. o. X 

### l-e To. when 

### (tOn/rOD)**~** 

### (tolf/rolf)

For systems numbered 1-8:

when 

# ( to.)

- "'s. o="'s. o. X 

## 1-e To. 

### tOn/rOD> (tolf/rolf)

tor systemsnumbered 1-8: '

when 

### 'lis. 0= 

### 'lis. o. X

toJTo,," 

### as defined In4.1.20 toll/Toll 

### as defined In4.1.21 'lIs.a.% 

### as defined In 4.1.14 4.1.26 Off-cyclo sensible heat loss Integration factors. For systems numbered 1-4. determine off-eycle sensible heat loss Integration tactors. Fa and F4. from Figures 3 and4. respectfvely.usingvalues of

....l'.0 definedlnsection 4.2.23. and toll/ToffdefinedInsectlon4.1.21.

For systems numbered 5-12. determine off-eycle sensiblo heat loss Integration faCtors. F5 and FO. from Figures 5 and 0, respectively. using values of

....1'.0 defined In section 4.1.23. and toff/Toll defined in section 4.1.21.

4.1.27 Otr-eyele ln1lltmtlon heat loss integration 'factors. For systems numbered 1-8. determined offcycle infiltration heat loss Integration factors. Fl and FS. from Figures 7 and S. respectively. using values or 'lt8.a defined In section 4.1.25. and toff/Toff defined In section 4.1.21.

4.1.28 On-eycle sensible heat loss. Calculate the on- cycle sensible heat loss of the system, LI'.oN. expressed 

### In**perr~nt** and dellned:

- • for systemsnumbered 1-8:


### Ls. ON=Ls. 88

( 1 ) ( 

# _ton)

-(K s. ON) (ElF. 0)**~** 

## 1-e Too
, Op./TOD (or systemsnumbered9-12:


### Ls. ON='(CS) (Ls. SS.A)

-(KS.ON) (€IF. 0) 

# (_1_) (l-e**~;:.)** tOn/rOD

where

Cs as definedIn4.1.15 LS.83. A 

### as dellned In4.1.4 RS.oN as defined In4.1.10 

## e'lo as defined In 4.1.22 tooJT o. as doflned In4.1.20 4.1.29 Otr-eyclo sensible heat loss. Calculate tho off-eyclo sensible heat loss of the system. 

### Ls. OFF. ex- pressed Inpercentand defined 

### as:. • for systems numbered 1-4:



### LS.OFF=(Ks.OFF)

# G:~) (F3)

(orsystemsnumbered5-12: 

# +('lIF

...) (F4), 

## PROPOSED RULES

L8.0FF=(K 8•0FF)

# G:~) (F5) 

# +('lIF• .,) (F6), where

Ks.OFF 

# as defined In 4.1.17 

# toll
as defined In4.1.21 

### to. as defined In4.1.20 Fa. F4. F5. and F6 as defined In 4.1.26 

# of,...,
as defined In 4.1.24
, 4.1.30 On-eycle Inflltmtlon heat loss. Calculate the on-eycle Inflltmtlon heat loss of the system, LI,O"II. expressed In percent and defined as:
torsystems numbered 1-8:

where 

### Lr. oN=Kr. ON 

### (70-42),

Kr.ON 

### as defined In 4.1.18 70 

### as defined In 4.1.4 42 

### as defined In4.1.15

torsystemsnumbered 9-12:


### Lr.oN=O

4.1.31 Otr-cyclo Inflltratlon heat loss. Calculate tho off-eycle Inflltmtlon heat loss of the system LI. OFF. expressed in percent and defined 

### as:

torsystems numbered 1-8:


### Lr.

# o~F=Kr. OFF 

### (70-42} 

# G::') (F7)

where

KI. OFF as dellned In4.1.19 70 

### as defined In 4.1.4 ,42 

### as defined In 4.1.15 loll as defined In 4.1.21 

### to. as de1lned In4.1.27 Fl. F8 as defined In4.1.27 

## ....8

....% as defined In4.1.13

torsystemsnumbered 9-12: 

### +('lIs

. ... X) 

### (F8)



### Lr.oFF=O

4.1.32 Part-Ioad- fnel'utilizatlon efficiency. Calculate tho part-load fnel utilization efficiencY, expressed In percent and defined 

### as:
for Indoor units

### X [Ls. ON+L s

. oFF+Lr. oN+Lr. OFF],
for vented floor furnaces

.

where

CI Qp =3.3 (or vented floor furnaces =pilot flame fuel Input rate determined In

accordance with section 3.2 ofthis Appendix. In Btu's per hour ' QIN =full·load input rate (Including pilot flame fuel Inputrate) determinedinaccordancowlth section3.1 ofthisAppendix, InBtu'sperhour 

### Li =jllCket loss determined In IICcordance with section 3.4 of this Appendix, In perCMlt L£.A as defined In4.1.5 to. lIS dellned In4.1.20 

### toll 

### as dellned in4.1.21 Ls.ON as defined In4.1.28 Ls.OFF as defined In 4.1.29 LI.ON as defined In 4.1.30 LI.OFF as defined In 4.1.31 4.1.33 AnnualfuelutilizationefficiencY. Calculatothe annual fuel utilization efficiency. 

### EFFY". defined 

### as: where



### (118S) 

### (5200)t(2.5) (11u) 

# (2:a) (1.7) (4600)

where

5200=the average number of annual heating degree

, days for the United States 4OOO=tho averago number ofnon heating 

### season hours per year that the energy 

### to tho pllot light is assumed wasted 1.7 =average vented heater sizing factor
1733 =as defined In-4.1.5 17. =as defined In4.1.32 Qp =as defined In 4.1.32 QIN =as defined In4.1.32 4.2 AddU/onal Requirement, lor Venled lIome lIeal/nq Equipment {T/illzln/1 a Slack (or flue) DamrJtt. Cnlclllnto tho stack (or fiue) damper effectiveness. 

### Do, defined as: whenAD cos O>0.5!1 As: '



### _ 2.24 

# [1-AD cos

# flJ

D

_ As



# .-.J1-[ 1-

# AD**~~S**

# flT

whenAD cos OS 0.5!1 

### A3:

Do=I, where

As=eross sectional area ottho stack determined 

### In

### ne- cordanco with section 3.1> or thIs Appendix. In squaro InchCll AD=not area ot tho damper plato detcrmlncd In liecordance with section 3.5 ot this Appendix, In squaro InchCll Il=tlie angle tho damper plato makcs when closed

with a planeperpendiculartotho !lxls

### ot tho stack
4.3 Addillonal Requlremenl, lor Venltc/ lIome lIeallllp Equipment UIIZIzlnll Indoor Airlor Combu81/0n andDra/l Control. For units obtaining combllStlon IIlr lind droft • control air from Inside tho residence. the IIPpropriato factor describing tho ration of on-cyclo stark /low to on· cyclo fluo flow 

### (S/F>. tho ratio of off-cyc1o flllo flow to on-eyclo fluo flow at Idontlcal temperatures (Dp). and the ratio of off-cyclo stack flow to on-cYc]e stack flow lit ledntlcal tomperatllrC8 (Ds) shall bo determined from Tablo2.

4.3.1 Optional procedure for determInation of 

### DI' for vented homo heating equipment employing II power -burner. Calculate tho ration 

### CD,.; of thO rato of flllo CDS
mass flow throllgh tho ventcel hellter during tho oft period, mp,OIlF CTp.ss). to tho lato otflu, CDS m!l."3 flow during tho on·porlod. mp,ss

### (Tp~<3). ant! defined DS: 

## D _my; OFF 

### (Ty. 

### ss)

p- 

### my. 

### ss (T,.Lls)

, whero 

### mF,OFF (TF. S8)=my. 

### OFF (TF. 

### OFF) 

# x[ T,.ss-42**JO'~[TY.OFF+460JI.IU** 

# T,. OFF -42 

# T,. ss +460

whero Tp,83 as defined 

### In 4.1.4 Tr, 01l1l=fl1lO gDS temperoturo during tho olt. period**mCll3ur~d** In**1I~~ord!lnct>** wIth section 3.0 of this AppendllC, In dogrecs Flihronhelt 

### . ( ) 100VT 

# m,. OFF TF. 

### OFF**=~** 

### '1"

where •

Vr=flow rate of trnccr gllS through the vented**hellt~r** • measured In IICcor(lanco with section 

## a,o of this Appendix In cubic feot permlnuto Cr"'concontroilon by volume of troeer gas present In tho flue gas samplo measured In IIccordnnco with section 3.0 of this Appendix, In percent 1/1' = 1.325PB 460+Tp,OIlF where

T,.ollF 

### as defined IIbovo 

### P D 

## = barometrlo pressure measured In liecordanco with seotlon 3.0 of tills Ap. pendlx, In Inchcs ofmercury



### m,.ss(TF.8S)=[ (RT. 

### F) 

### ;+lJ

# lI~VA' whero



### Rr., lIS defined In 4.1.2 AIF lIS defined In4.1.16 Qto lIS dellncd In 4.1.32 •



### _ HHV A as defined In 4.1.10 4.3.2 Optional proctduro for determlnntlon 

### 01 olt-cyclo dmft factor for lluo gas flow (or vented home IIcallng equipment employing II power burnrr. Calculnto tho off-eyclo dmft factor forflue gllS flow, 

### Dr, defined DS:

for systems numbered 2. 4. or 10: Dp",(Dp)
for system number 

### 12: Dp=(Dp) (D.).

whero

Dp as dofined In 4.3.1 D.as defined In 4.2 4.3.3 Optional procedure tor**det~rmlnntlon** of olt-cyclo dmft (netor for steck gllS flow for vented homo Mallng equipment employIng 

### a power burnor. Cnlculato tho off-eyclo dmftfactor for staCk gas flow, Ds, dellned DS:

torsystem number 2: Ds=D p"'O.55
for systemnumber4: Ds=Dpd.40 forsystemnumberS: Ds=(Dp) (D.)

FEDERAL REGISTER, VOL. 42, NO. 169-WEDNESDAY, AUGUST 31, 1977where D p as definedin4.3.1 D. as defined in 4.2 4.4 Additional Requlr=enl8for Vented H= HcaUna Equipment UtiUzing a Dlred Vent SU!lem. For vented heaters utilizing a direct vent system or intended for ontdoor installation, the aoproprlate SIF !acwr and DI' !acror shall be determined from Table 2. If a unlt is equipped with a power burner, DI', may be calculated nsing the valne of Dp determIned in section4.3.1 ofthis section.

.

4.5 Additional R£qulr=enl8for Vented Home HcaUna Equipmentwhkh Mo1u1ate or Varu Fud Input wUhout ControUing Ezct88 C1mIbuttion Air. A vented heater**whi~ll** is -:qnipped with a 

### mecl1anlsm lor reduclng the rate offuelmpntbnt doe.onot provide a means for con· trolling 

### excess combustion aIr, shall be tested 

### at Its maximnm firing rate in

### accordance with 

### test prooodnres in section 3. These 

### test results shallbe

### US?4to calculate
a seasonal efIlciency and an annual operatirig 

### cost which isbased upon a single:fixed !uellnputrate.

4.6 National Acerll!1e Number oj Burner OperatinIJ Hour!. Calculatetheaveragennmberofburneroperating hours, BOH, defined as:

BOH=(A) (2080) (design heating requirement)-B, where

-

208O=ustional average annual heating load hours designheatingrequirement 

### (QID)(0.5) 

### 1000

0. 5 =approximate valne lor the raUo or steady state efficiency 

### to 100 

### Urnes the average heater sWng !actor. 1000=conversion !actor 

### to convert Btu's per hour 

### to kiJo.Btu's perhour 

### 'lIN =as defined in4.1.32 100,000 

### ..4. = (341,300) (PETuBE)+(ctI.-Qp)V. B =(0.006) (Qp) ('1.) (A) PE=power burner electrical energy Input rate nt full-,load steady..stete operation determined in 

### accordance with section 3.1 of this Appendix, inkilowatts.

. B'E=circulating.rur blower (or circulatingwater pump electrical energy Inpnt rate at tu1f-load steady· state operation detkI:mlned in 

### accordance with section 3.1 otthisAppendix, inkilowatts 11 =1.00 torvented heaters employing a singlemotor 

### to drive a power burner and air circulating !an
or blower, 

### (i.e., the raUo or average blower or pump on-time 

### to avexage burner on-time) and l.38for allotherventedheaters. 

### 'lIN =as defined in4.1.32



### _ 'lp =as defined in4.1.32

'1. =as definedin4.1.32 4.7 Aterll!1e Annual Fud Ena(JU Omrumplion for Vented H= Heating Equipment. Calcu1Bte the avemge annual fuel energy consumption for vented heaters, Ey, expressed in Btu's per year, and defined as: 

### E,= (Q- QINP) 

### (BOH)

# +(8760) (Qp),

where

_

Qm as definedin4.1.32 Qp as defined in4.1.32 BOHas defined in4.6 8706 as definedin4.1.33 4.8 Aterll!1e AnnualAIUil/aru Eledr/ctJl**E~** Cbnmmption for Vented H= HcaUng Equipment. Calcu1Bte the average annual auxiliary electrical energy consump- tion, EAB, expressed in kilowatt· hours per year GIld defined as:

where EAB=(PET!I BE) (BOB)

PE as defined in4.6 BE as defined in4.6 11 as defined in4.6 BaHas definedin4.6

4.9 Acerage Number of Burner OperatlnIJ HOUT8 in Different**Geograph~** Region! of the Unftcl statu. Calculatethe average number ofburner operating hour.; by geographic region ot the United States, BOHII. defiried as: 

## PROPOSED RULES

BOHRcoCA) CHLB) Cdcslgn hc:ltlng requlremmt)-B, where

A HLH ll3 

### dcIlnc-d In 

### .J.G

cohc:lting lrod hourn tilr

n**~** l:w.:mphlo 

### re<:fnn dctcrmlnoi

### In A-:- ccrd.:lnro with tho hc:ltlog lrod hour map in 

### F4:ur0G Designheating requlremcntCIl:! dcllned In 4.1l 

### B (2)(HLH)(A)(QI')(7I

..) 

### 100,000 '

where

100,000 ",Fnctorthnt llOOOunls for pcrtCllt and EJJTU. (2) eroUo 

### of nvero..."ll kllo'"1h 

### of hc:ltlng 

### r=n to hl.'3Ung lO:ld hours. HLH cllS defined 

### nboro A Il3 defined in4.!! Qp Il3 defined in4.1.32 U IlS defined In U.32 4.10 Arera:;e Annual Fud Enag'J CiJ:utlnpb!l f::r Vented Homl Hcatin,} .Eiltllpr.ud tl'l 

### acc:rapl: Rt;O!l ofthe Unftcl Statu. CalCu\:lto tha nvtrOC:o nnnU:ll fud energy consumpUonby gw.;rophlll re;:!on 

### Citthn Urilted Stetcs, EI',Il, cxpre:::::.."d Ii\.Dtu'speryc:lr,anddclln...<'!1113! 

### EF, n=(QIN-QI')**(BOHn)+(87G~)** 

### (Qp),

where

QJG Il3 defined in4.1.32 Qp Il3 deJlne-d in4.1.32 BOHll Il3 define-!! In 4.!) BiGO Il3 defined in4.1.33

4.11**Ac~e** Annt!cl AtuUCmt El!drfd El!uV; CbmumpUon for l'trJd**Hor::~** ](c:;!l!::J E;t:lfJ!:l!1:! III DIfJaem**Gco3TCP.~~** Rqbru 

### rl tbe Uc:!!(j S!:;!U. Cn!· cufute tho QVcro.go annU:ll nuxlllary**c!ectrl~ ~**  consumllUon tor dIl1crent sro;:roplllc re;:!= or**th~** United Stetcs, EAII.It,**~** in kiIoWlltt-hO!ll':l per yearand deJlne-d Q.S: 

### EAU • 

### n= (PE+yBE) (BOHn),

where

PE Il3 defined in4.G BE Il3 defined in4.G Y Il3 defined in4.G BOHll Q.S defined in4.9

4.12. Minimum Slar.4ardl:cd Dul]ll lIe:;!!!!'] 

### Rtquuc· mtnt. Calculate tho minimum 5tllIld:lrdl%Cd 

### cfui..'"11 heating requirement, DHR1.m:,**~** In Btu's per-hour for which Q 

### rCc:Ionnlllllllli3l opcmtlngcast could be computed, define-!! 1l3:


### DIlRMIN (7111) (Qla) 

### 200

U3 Marlmum Slan:brdl:cl DuC;m Hrolln, Rtqu1tc· 

### mtnt. CalculBte tha lIl!IXImum 5tllIld3rdItCd d!::!gn heating requirement, DHRuAX.**~;:d** in Btu'a pcr-hour, ror which n reglorml Il!1Ilti3l Opcnlting cast could be compurod, ddlned 1l3:


### DHRMA.'t (71

.. ) (Qla) 

### 110

4.14 Acaa:;, Num!:a 01 Burna Dwellr:, II;;uu trJ**atJJ3TCP.\~** Region ofthe CloUd SldUfar**tb~** Mlnfx:3!lc Slan4<iTd1u4 Dul1ll HcaUn,]**~1UCt:ltr.l.** cat."Ul3to the nverogo number Cif bumu opcrotlng how.;,tzr graphlo region or tho United State:! 

### tar tho um stendnrdlIOO design heaUng requirement, BOH

### 1I.!.sm, defined 1l3:



### BOHn.MlN=A(HLH) (DHR14Ir;)-B

where

A Il3 deJlne-d in4.0. HLH Il3 dcllne-!! in .uI DHRuIN IlS defined in4.12 B Il3 denlled in4.9 

# 43939

BOH**n.~ux=A(HLH) (DHR~ux}-B.**  

### 'I7hcro

A Q.S dc1ln.."d in 4.6 

## mH 113 d:illnOO in4.9**DHR~.sx** Il3 dc1ln.."d in4.l3 

### B 113 !bJln.."d in4.9



### En, r..Mn:=(Qln-Qp) (BOH ll

• 

### Mn;)

'I7hm1 

### +(8760) (Qp),

QI. 113 

### de.fIn:-d 

### In4.1.33 

### Qr 113!bJln.."dinU.32 BOHe-Ul:: II3!bJln.."d 

### In4.14 SW) 113 !bJln.."d in4.1.33 4.17 Arm:;: Arm!:31 Fcel E1!..'Tg'J Ommmz;ti0:3 fUT l'C'.l!d H:l!:'..:t HtcllT!] E1tl1pn..'1Zl f;;J CeCIlMP·\It;**~!f~** of

L'l! UfJ!!d St::!!:J fOT**L~~** JIa:rhr..!lO StmdmifrdDe3f1ll H!cllr:] Rez!lUtr:l..'1'.l. cat.'IIl3to th:l a.ergaa annt!3l f1cl o:ll!Z\!Y consmnpU!lI1 bygmgraphb reg{on ofth3 United States 

## tar th:l 

# numnnm de:Jlgn**h~tfII6** requf.remmt. 

### E"**.r::-~.u:** c:qm::::..."d in Btu's per year and dtiin..od 83: 

### E"I1.!JAX=(Qm-Qp) (BOH 

### e
.MAX)



### whuo 

### +(8760) (Qp).

Qm Il3 d:illIL"d in4.1;32 Qp ll3de.fln:din4.1;32 BOHI!-u.u: 8.3 d:illIL"d inUS Biro Il3**~"d** in4.l.33 4.l8**Acac;~**Al3l3calAtuUfuru El!drkt:l EI3erI17 Car

..... lCcfll:r.lfJrl'tI3l**HJr'~H!tZlir:g** E1tl!pr:J.I!:T'..tb:1 Ga;grapllk R!¢m oj**~** Minfx:3!..'!3 S!zr.!brdfrd Dufgrl H!ating R!7f.lUtr:l..'1'.l. C3l.'IIl3ta th:l 11V=;:!l annt!3l am:Ili:lIy**e!.~~** cru::gyconsumpUml**byg"ograpb!~re;:!ono!tha** United Stetc:3 for th3 m!nImnm st..and3rdlzed de:Jlgn hl!3ting

### requIro=t,**EAJr.2-m~:,** exp=dInkilowatth=per**y~** nnd !bJln.."d 8.3:



### EAll.n.Mm=(PE+UBE) (BOHe.ym),

whuo

P E 113 dclln..."din4.!l 

### Y Q.S**d~d** in4.6 BE 113 dclln..od in4.!!
, BOHz-Ul:1113 d:illILodln4.9

UG Amc;4Ar.l3c,uAtuUfuru El!drkt:l EP.ag'J CaIlnlofllmfJr VtI3lcl H!7C4 H!din,] :Ep.:.Ipm..om f;;J Ceo**grcJ:>.~1: R!~**  of**~** Uflftcl StaJe8 faT the**M~..t.m** S!=!ardl:td De3f;m Htdin,} Rqrsire=r>..t. CalcoI3te the
Q

### v=;:o I1I1Il!I3l IIUXIllary**cl.."Ctrl~** energy =p t!ml by**g~phll:** rcgI!lIl ottha United States !or the 

### IIl3X1mum st.and3:dlzed de:Jlgn heatfII6 requirement. EAZ.Z-Jt,u=CPETg BE) (BOHz-MAX), 

## wh=

PE 113 dclln..."d 

### In 4.!l 11 8.3 !bJln.."d in4.!l BE 8.3delln..<'!1ln4.!l**1I~1l1MUX** 8.3 dclln...od InU5



### FEDERAL REGISTER, VOL 42, NO. 169-WEDNESDAY, AUGUST 31; 1977

# 43940 PROPOSED RULES'

TABLE 

### 1.-Factors describing ajr/low rate for gas and oft·fueled vented home heatinfl eqmpmcnt-utilizing indoor air for

### C01ll1JIIS/OI~ and draft control

Un}ts without a stack damper but with Units with a stack damper and

Typo o( Burner Integral draft divcrter Barometric draft regulator Integral draft divcrter Barometrio drnlt regulator System SIF D, Ds Systom SIF D, Ds System SIF D, Ds System SIF D, DB

Vaporizing•••••••••••••••••••• Power

......................... No. No.

1 2 2.4 2.4 1.0 LO .3 .85 3 4 1.4 1.0 1.0 1.4 .30 .70 No.

5 6 2. 4 •••••••

_ D. 2.4 •••••••• D. No.

7 8 1.4 •••••••• D. 1.4

........ 0.30X

NOTE.-The abovefactors were developed bythe National BureauofStandards and are baseduponinformation Inthe publicliterature, laboratory and computer slmulatlon sludies conducted at NBS, andlaboratory and field 

### dataobtainedby several research firms under contractto NBS and FEA.

TABLE 

### 2.:"-Factors describing air 

### flow rates for Gas 

## or oil-fueled vCII!ed /loor furnaces


## or home heating equipment 10ith a direot vent 81Jstem

Type ofburner

Vaporizing

............... Power

................... Unitswithout

### a stack orflue damper

System DF

. No.

9 10 1.00
•30 Outdoor units with


### a flue damper or Indoor units with a

stackdamper
system DF

No• Type ofdrilt

11 D. None

__________••

__••

_ ............ 12 0.30zD. Barometric draftregulator

__ ._.... Integral draft divertcr..

__••

______• SIF

1 1.4 2.4

NOTE.-The above factors were developedby the National Bureau of Standards and are based upon Information In the puhllc literature, laboratory and computer simulation studies-eonductcd at NBS, Wid laboratory Bnd field data obtaIned by several research firms under contract to NBS and FEA. TABLE 

### S.-Valucs of higher hcallllU vallI{) (HHV ), Stoichiometrio air/fuel 'I'at/o (A/F), and latent heat loss (L , ) lor tupieal fuels

Fuels

No.loll •••••••••••••• No. 2011•••••

_ •••••••• Natural gas••••••••••• Manufactured gas

..... Propane

.............. Butane

............... IU1VA (British

. thermal AIF(

.. ) LL.A unit per (percedt) pound)

10,800 14.68 

### OM 19,500 14.51 0.60 21,800 10.!}! 0.01 18,500 

### 11.83 10.10 21,500 15. liD 8.00 20.890 15.33 7.JO

FEDERAL 'REGISTER, VOL. 42, NO. 169-WEDNESDAY, AUGUST 31, 1977

.

## PROPOSED RULES



## '"

. :::: (;l)SS':!lV 1ll SS'SlV 

# !

, 

# I

, 

# I

..J 

## , :r

# ~ e 

# ....

.... 0-



# - 

# j rt 

# , I 

# J

, I**~** 

## I

, 

# I 1l il f

# ~H I! J'I I

on

# '~**'~** I 

# I 

# I 

# J

.**~** II 

# IrtH-1 I

# dI I

# ~

# rn~tHffi**fm~ ~**  d

# ~I**~ ~**  I 

# I 

# IllI1l!lR',

# '*1**~** I

# ~~ . 1 

# I I

• , " :1 • 1 10 

# 'iii I •• '
, , 

## 1M I

# hJ~**II~** i I, t I ..1 

## tff{ I, 

## t,. I 1 I'. t 

### 1

# *~':'il!llIIiHI~~t'~ 

# ,**~ ~I~~BI:~'**  

# " ::,**I'~** 

# ll1H**l~** 

# ¥ f 

# n'

.", : I

# ~I

# II:**,~I** i

# I I 

# ! I 

# !;.! I II'**~'. ,~",** **'~I~~** 

# "''i1t.IIIlfrf!.m II Ii**"~'.,.~::: ';~:**  

# . lit

.**',,~':':** 

# ,,' "



# - 

# .**~., ~**  II) 

### V'SS'S] "'-

....,..,,! o 

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