43930 

FEDERAL ENERGY 

ADMINISTRATION 

[ 10 CFR Part 430 ] 

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 testing must be conducted. The pro- dures for automatic and semi-automatio 

cedures merely establish 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 on May 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 the proposed 

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). 

Laurence J. 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. By notice 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 test procedures for PEA's use in prescrJbseparate 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 are described in a number of standing equipment. 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 wntten comment ,?n the n,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 

and has announced the holding of an ad- for oil fueled fioor furnaces, and UL 730-

ditional hearing. This heaiing. 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 of vented 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 formulated by NBS and proposed herein today, 

account-for these factors. 

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 Energy 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 contained in, 'authorized by, or required to be used by, a prQPOSed rule. 

Additionally, the Administrator must ascertain the extent to which the named 

organization is structured, in membership and in standards-development procedures, to aIlow for public 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 the Aet. ' 

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, American Society for 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 incorporated. 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 the meaning of section 32 (b). 

In this regard, the Administrator has determined that these organizations do not 

provide for the full range of public participation that section 32(b) sets forth. 

In this rulemsk1ng, FEA is providing 

interested persons an opportunity to 

comment on the appropriateness of these 

standards as used in the vented home 

heating equipment test procedure. Comments are SPecifically requested on any 

specific changes the person commenting 

believes are necessary to make the standards appropriate for the purposes of testing 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) some of which are applicable to the test procedures for 

vented home heating equipment. Comments on these definitions are timely as provided below. 

B. Measures oj Energy Consumption. 

The Act requires PEA to prescribe test 

procedures for the det€rmination of 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 based upon 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 nnnual fuel 

utllizatlon efIlclency, the heating load 

hours, the residence design heat loss, 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 cost by 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 

heating equipment: 

The proposed test procedures for'1'eglonal costs will Incorporate a. map of the 

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 temperature for each reglon. , 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 the ratio 

pf the heater's annual output of useful 

energy to the annual fuel energy Input 

.of the heater 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-cycle losses Include: 

(1) Energy contained in the combustion gases which are discharged outdoors 

·through thefiue; 

(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 of heated room air which 

escapes through the open heater stack 

pipe to the outdoors; 

(3) Fuel Input to a continuously burning gas pilot. 

:PEA recognizes that there may be additional useful measures of energy con- sumption for vented home heating equipment 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 

the un1!orm test methods proposed today 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. 

The proposed test procedures are based 

upon the heat loss method, in which 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 the weather profile, it is desirable to measure in the laboratory quantities which characterize the perform- ance of n. vented heater under standardIzed laboratory test conditions and then 

to calculate Its performance under typical field conditions. ThIs has the advantage or sImpli!y1n.g the amount of experimental laboratory data required and 

thereby reducing the costs of testing. 

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 accomplJshed by measurlngthe steadystate fiue gas temperature and the con- centration by volume of carbon dioxide 

in the fiue gas. For vented heaters utilizing 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 account for cyclic e1Iects by measuring fiue gas remperatures during warm-up from a cold start 

(for gas fueled heaters) and during cooldown from steady-state operation. As 

noted above, actual fiue gas temperature 

measurements on vented heaters with 

integral draft divert€rs are difficult to 

make. However. for purposes 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 the various 

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 simulate field con- tions having the 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 the gas 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 weighting factor, 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 presently employed 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 heating industry. 

The flue-gas and stack-gas tempera- ture-vs-time profiles 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. weather pattern 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 

data which relates to the size of the samples which the provision would require 

to be tested. Comments alleging that the 

sampling prOvision is burdensome should 

include a fUll discussion of the facts 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 addition to those proposed 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 

direct vent system. 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 willi respect 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 other relevant in1'ormnlon, will be con- Information available to PEA. At the 

sidered by FEA before finnl 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 in writing, and only make a rebuttal statement. The rebutone copy of the information need be 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 limiformation or data and treat it accord- tations. 

ing to its determination. Any Interested person may submit 

2. Public Hearings. (a) Request pro- questions to be asked of any person makcedure. The time and place of these pub- ing a statement at the hearings 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 the hearings may submit the 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. and 4:30 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 the entire record of each hear,... 

"Venter Home Heating Equipment--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 of persons that has such an Interest· 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 ~cOctober 26, 1977. Each person se1ectoo to tion at the FEA Freedom of Information 

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 letter re- Agency for his comments concerning the 

questing an oral presentation or by 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 the rIght to select the persOns to be heard 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 by the Agency for "major Federal 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 be used only to standheard. ardlze the measurement of energy usage 

An FEA officIal will be designated to and will not affect the quantity or dIspreside 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 statement is 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 impact as 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 by Pub. 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 Energy Administration. 

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 or permanent 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 in the casing. ' 

"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 shall be 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 the representative 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 or VENTF.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 tho f1uo 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 the Incrts 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 prior to the 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 "Flue losses" mcans tho sum 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 to mlllntain 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- bustion chamber_ 

elbow shall bo covered with Ir.oubUon h:lvlnc: an It ~ue 

of not less than 7 (OF-HR-Ft'JDtu) nod an outer b~'er 

of aluminum lolL 

Tho tests !or mrosurlng Ilu~ &OS tcmpcrot= durin<: 

warmup nod cooldawn, nod for tho tlCldy ctnto te::t ~f 

section3.1.1.3, shall bocondudtd 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.ttbycrofalumlnl101 ColL 

1.11 "l'ower burner" means a burner whlch suppUes either gas or air or both at pressures exceeding, fOr gas, 

the line pressure, and for air, atmospheric pressaro, or n burner whlch depends on the draft mduced by n fan for 

proper operation. • 1.12 "Vent limiter" means a device whlch limits the 

flow of air from the atmospheric diaphragm chamber of n gas pressure ~tor to the atmClSphere. A vent limiter 

may be a limiting orifice or other llinlting 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 of an air intake teriDlnal through whlch the 

air for combustian is taken from theilutside atmosphere, and a vent terminal from whlch fiue gases are discharged: . L14 "Indnced draft" means a method of drowing air into the combustion chamber by mechnnIcal 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 

the fnel. 

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 air and the water vapor formed during ccmbnstion is condensed. The higher heating valne is usually expressed in Btu's per coble foot for gaseons fuel, or Btu's per gallon for liquid fuel. 

L18 "IIitegml draft diverte'C" means a device which 

is an integral part 0[ a vent~.d heater. which is desllOled to n) provide for tb"e exhaust of thl' prodncts of com- bustion in the event of no draft. hack dmft. or stoJl~e 

beyond the draft diverter. (2) prevent a back droit from 

enter1n!r the ventl'd heater. (3) neutralize the elIect of 

stack action of the chimney or !!lIS vent upon the opera· tion of a vent heater. 

L19. "Vent damper" means a -device intended for 

installation in the exhaust system of a vented heater. nod 

whlch is desilOled to open the exhaust system when the 

vented heater is in operation and to close oII the exhAnst 

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 cbamber to the ontdoor elr. ~ 

1:21 - "Infiltration parameter" means that portion of 

unconditione4 ontside air drawn Into the hE'Sfed space as a consequence of loss of conditioned air through the 

exhaust system of a 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; the heat of combustion being used to vapOrize 

the fuel, with provision for admittiM air and mlxlng It 

with the oU vapor in combustible proDtlrtions. 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 

long insuIatoo plpent~hed to tho vcnlca1l)' 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 an R voluo n.;;t 10 than 7 fF-HR-FTJJBtu) nod an outer byer of aluminum foil. 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 vented room 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 bo re: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 

in the hl!3ter and tho CJ.hanstfnir intnko 5l1Stcm ruppUcd witb it. On unlts whlch !lIil not de!!i:IW1 to pr~hl!3t tho 

incoming alr, tho fllst 181nche3 of vent nlpo 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 byer or alumlnumfoll. 

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 all controls at 7 to 10 1nclie3 water column. '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, For n VCllted hl!3ter utl1Wnc: pr0-

pane gas, malntllin tho gas rurPlY to the unlt undO' Icst at 11 norrilallulet pr=ro 01 1 10 13 inehes \oiltercolumn 

and 11 speclllc gravity 01 LL:i. Tho RilUbtCir Gutl~t pro- sure at normal test pr=ro Wall be opproxlm.a!el~·lh:J.t. 

1"eOlmmended by thomnntW.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 used in tho test with an error no 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 tho obovo ANSI slnod:ird. 

2.3.4 011 Supply. For n vented hl!3ter uUIWn,; fnel 

oU, the fuel all typo used thnll be No.l!al1l 011 ror v:lpum. 

lng typo burners and as rpcctllcd by tho =nb:tlmr 

for meehanlcalotomldng t)~ bu:rncr.l. Tho No.1 fael 

oU viscosity shall bo as spCdllcd fn UL-Wl-llin, &~tll;n 

36.9. Tho FPeclIlI!3Uon 01 other fael oils fhall ba os dl!llntd 

in ANSI Zll.z03-1iJ10. 

The hlgher hl!3tlog voluo of tho to fuclllll th:lU 1:0 .measured with un 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 test unlt 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 of tho mmeplllto voltaso rtlDgtl. 

msde in sccordance with manufacturer's !nsI:rnctions. 2.2 Flue and Stack ~ufrtmenU. . 2.2.1 Gas fueled vented home heating equipment 

employ(ng integral draft diverters. 

For the steady state perlormanro test described below, 

gas fueled vented home heating equipment employing integral draft diverters with vertically dlschari;!ng out- lets shall have attached to and vertically above tho.outlet, a stack having a cllameterthe same size as the outlet 

and shall be covered with insulation having an R volue 

of not less than 7 C"F-HR-Ftt/Btu) and an outer layer of aluminum foU. The stack shall extend not less than 5 

feet nor more than five feet six inches above the hlghl'St point oUhe outlet. Vented heaters having a hortzontally ,. ilischarging outlet shall have attached an insulated DO 

degree elbow. the same size as the outlet, and sufficient 

vertical insulated black iron pips so that the pipe outlet 

is not less than five feet nor more than five feet six Inches 

" above the hlghest point of the heater outlet. A hortzonbl . section of pips may be used on the fioor furnace between 

the diverter and the elbow if necessary to clear any 

framing used in the installation. The length of thls section 

of pipe shall be the minimum needed. The stack and 

2.4 Bwnu MJutlt:ltTlu. 2.4.1 Gas Burner Adjustments. Bumcro o( gas rackd 

vented heaters Wall 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 

minutes olopcmUon stnrting with allr0rt5 or tho 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 

and 30 Inches mercury b:lromctric pr=. 

Un vent l!mlling = Is provided on n gas Jll'= 

regulutor, It shalllXl in pI= durlng alltcsts. "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 and n hourly Btu inpu.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 set up as specified In 

sections 2.1. 2.2. and 2.3. Begin the steady-state perform- ance test by operating the burner and the circulating air 

blower with the adjustments specified In 2.4 and 2.5 until a steady-state temperature Is attained in the stack gas 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 measuring fiue 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 

and 30 Inches oC morcury. Measure gas input temperature and pressure at the meter and the barometric pressure. Correct the metered gas fiow rate to 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 section 2.2.1. A single bead-tyoe thermocouple not lnrJ(er than No. 24 AW 0 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 not more than 5° F (2.8' C) between readlngs 15 minutes 

apart. the steady-state fiue gas temperature (Tp ... ) 

Shall be measured using this single thermocouple and a sample of the fiue gases shall be taken in the 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. , , 

On nults not employing an integral 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 of flue gases shall be analyzed to deterrulne tho concentration of CO" (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 location Which Is deterrulned by the 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 the average 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 

shall bo sealed during alI tests. 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-Cool Down 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 the Indoor air circulating blower shalI be made to operate during the first thrce minutes of the off period and shall then be turned off uniess tho vented heater 

employs a single motor to drive a power burner and an Indoor air circulating blower In which case beth shalI be 

turned oII t6gether. The main burner(s) shall remain oII 

until equilibrium condltions are attained. as Indleated 

bl, tem~eraturo changes In tho flue gas of not more thall' 

3 F (2.8 C) betwecn readlngs 15 minutes apart. Foruuits 

employing a contlnuonsly burning piiot light, a third 

fluo gas temperatura measurement shrut then be made to 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 

rate to the pilot light (Q.), Uthe nult is so 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 temperature at 1.5 (Tp. OFFII:» and 9.0 (Tp. OFFC,,» 

minutes after the burner Is shut off using nine bead-type 

tnermocouples. not larger than 24 AW 0 ,In the locations 

preocrlbed in section :1.6.3. During this off-period. the 

tndoor lUI' circulating blower shall bo made to operate 

dunng the Jlrst. 3 minutes of the 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- tlnously burning pilot light. 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») Is assumed to equal 70°F (21.1 C). Dunng this cool down test! the energy Input rate to tho pilot Ught (Q.) If the urut Is so equipned, shall also be meas- ured to wiiwn an accuracy of ::3%. Record all measured 

values. If a vented heater with a direet vent system employs an automatic stack damper. it shall be closed 

during this cool down test. 3.3 Flue Gru Temperature MeMurement& Heal Up 

Tat for 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 of this Appendix. at 0.5 (Tp. ol«n) and 2.5 (T,. ONC") 

minutes after the main burner(s) comes on. The Indoor 

air circulating fan shall remain ,off during the first 1.5 

minutes of thIS warm up test and shall then be turned on nuless the vented heater employs a single motor to 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 

need not have this test performed. 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 total jacket loSS 

and the ambient room temperature during the ~est. 

3.5 Mroaurement for Determining Ejfedu:ene&& of 

Automatic Stack Damper. The effectiveness of an auto- matic stack damper (D.). In vented heaters 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 of the 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 

section 4.2 Is then employed to calculate D •. 3.6 lIftlUurement for Determining D p for SV61tm& 

Equipped with Power Burner&. On power burner systems not employing automatic stack dampers or power 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) are described below. 

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 

during the on·perlod) shall be mensured during a 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 the resulting cool-down period. If a draft wasmalntelned 

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 during the steady-stste tests) shalI be maintained 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 and then corrected to obtain Its value at a fiue gas temperature at steady-state (Tp.ss), USing the 

procedure described below. 

Within one minute after the nult Is shut 01I to start the 

cool d()wn test for determining D P'. begin feedlng 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. 

On units equipped with an 011 fueled power burner. the 

best loeatlon for Injecting this trar..er Ilas Is through a hole 

drilled In the air tube. The value of Vr shall be perlodl cally measured with an InstanteneOnsly readlng fiow meter having an accuracy of ::3 percent of the quantity measured and shall be less than 1 percent of the 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 of the 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 and tho fluo gM 

temperature. Tp.o,,., shalI be mcasured In tho centor 01 

the lIue plpo on the vented heater side of the draft rrguill. 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 

temperature mlllSurll1llent. 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 and may be either a batch or continuous rend. 

ng type Instrument. If the sampling 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 D p. 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 system numbor 

for the t~ of vented 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 tho typo of tcst 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 • operation deterrulned In accordancowlth 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· . mined In accordance 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, 1977 
where 

II =0.5 minutes 

I, =2.5 minutes 

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 at the 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 Efiective gas temperature dltrerence at start-up. . Calculate the etIective flue 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 in 4.1.4 

Tp'.o.Clt> as defined in 4.1.8 

It as defined In 4.1.8 o. as defined in 4.1.8 

For vaporizing type oil burner.;, ap'. 0, r= O. 

4.1-10 OtI-eycle time constant. Calculate the 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,=1.5 minutes 

1,=9.0 minntes 

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 Fehrenhelt and defined as: 

.lL 

'1£'.1". O. Z=TF. OFF(ta) -T,. OFF( Q») eTOF7 

where 

TF. OFFU,) as defuied in 4.L10 

TF. olt( =) as defined In 4.1-10 

b as defined In 4.1;10 Toll as defined in 4.1-10 

4.1.12 MinImumfiuegastemperaturedltrerenceabove room temperature. Calculate the minimum fluo gas 

temperature dltrerence above room temperature, "'P. =. :c, expressed in Fehrenheit and defined as: 

where 

'1£'.1". =. Z=TF, OFF( Q») -70, 

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

70 as defined In 4.1.4 

4.1.13 MinImum stack: gas temperature dltrerence 

above room temperature. Calculate the minimum stack: 

gas temperature dltrerence above room temperature, "'s. =.r expressed in degrees Fehrenheit and defined ns: For systems numbered 14 

where 

'l£'s.",.z (DF ) ('I£'F.co.Z) 

(Sf,) (Ds) 

Dp=otI-eycle flue gas draft factor selreted from 

Table I, for units with power burner.; where 

Dp' is. measured. determined in accordance 

with section 4.4.2 of this Appendix,ln degrees 

Fehrenheit. 

Ds=otI-eycle stack: gas draft factor selreted from 

Table I, or, for units with power burners 

where D p is measured, determined in accord- ance with section 4.4.3 of this Appendix, In 

degrees Fehrenheit. 

S/p=as defined in 4.1.6 

..,p.",.r=as defined in 4.1.52 

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 systems numbered 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 In 4.1.11 

SIp' 113 defined In 4.1.13 

Ds 113 defined In 4.1.13 

(or systems numbered 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 In 4.1.4. 

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= 

during burner on-cyclc. Caltubto n mulUpUc:lt!on !It:tor 

(or sensible hc:lt lO!S dwing bumcr on-cr~, KII..".' 

defined 113: 

Ks• oll 

Where 

100 Op[l+(RT.,) (AJ,)1 

HHV", 

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

hC3t ot air 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 !or umlblG hot 1= duro 

Ing burner ofI-cycla. Cokul:lto n mulUjlllesUon!lt:tor tar 

senslblo hc:lt loSs during burner (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 

4Wc convcrslon !It:tor to convert dC<;l'CO FIlhrcn· 

helt to d~ RnnJ.:!n!l 

Tp',ss 113 defined In 4.1.4 

;0 113 defined In 4.1.4 

Dp' 113 defined In 4.1.13 

KII,.. 113 dc1lncd In 4.1.10 

(or systems numbered lhS: 

K - (Ts. ss+460)I.n (Ds) (Sf,) (Ks. col S.OFF- (Ts. ss-42)o.!) 

where 

TSi: ~=~ti:h SIp' 113 defined in 4.1.0 .!i.3,.,. 113 defined In 4.1.10 

4GO 113 defined In 4.1.17 

42 113 defined In 4.1.15 

for systems numbered 9-12: 

(Ts. ss+460)1.1~ (D,) (Ks.o) KS.OFF (Te, ss-42)o.!, 

where 

Ts, &S 113 dc1lncd In 4.L7 .D, 113 defined In 4.1.13 

KII, c. 113 dc1lncd In 4.1.10 

4GO 113 defined In 4.1.17 

42 113 dellned.ln 4.1.15 

4.1.18 MultlpUe:lUon £lctor tar InWtmU!!n 1= during burner on-cycli). Calculato n mulUpJlt:ltIan !It:tor (ar 

InWtmUon loss dWing burner on~, KI. e~, dcllIL.-d 

113: 

{or systems numbc:cd 1-18:' 

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

43937 

(loo/Toa) ~ (toll/Toft) 

lor mtCI113 numbered 1-8: 

9,.0=9,.o.x 

!or mtemsnmnbtred 9-12: 

\7hm 9,. 0= (Os) (9,.o.z) 

(tOo/TOO) > (toll/ToU) ; 

tar s;skm:l numbered 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 

!or s;stCI113 nwnbered 9-12: 

'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 In 4.1.21 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 In 4.1.15 , '1'1' .... % as defined In 4.1.12 

4.1.25 Effectlvo stack gas tempemture difference at burner shut-down. corrected for burner cycling effect. 

Calculate tho effective stack gas temperature dilJerence 

at burner 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 systems numbered 1-8: ' 

when 

'lis. 0= 'lis. o. X 

toJTo,," as defined In 4.1.20 toll/Toll as defined In 4.1.21 

'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 

and 4. respectfvely. using values of .... l'. 0 definedlnsection 

4.2.23. and toll/Toff defined In sectlon4.1.21. 

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 systems numbered 1-8: 

Ls. ON=Ls. 88 

( 

1 ) ( _ton) -(Ks. ON) (ElF. 0) ~ 1-e Too , 

Op./TOD 

(or systems numbered 9-12: 

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

-(KS.ON) (€IF. 0) (_1_) (l-e ~;:.) tOn/rOD 

where Cs as defined In 4.1.15 

LS.83. A as dellned In 4.1.4 

RS.oN as defined In 4.1.10 e'lo as defined In 4.1.22 tooJT o. as doflned In 4.1.20 

4.1.29 Otr-eyclo sensible heat loss. Calculate tho 

off-eyclo sensible heat loss of the system. Ls. OFF. ex- pressed In percent and defined as:. • 

for systems numbered 1-4: 

LS.OFF=(Ks.OFF) G:~) (F3) 

(or systems numbered 5-12: 

+ ('lIF ... ) (F4), 

PROPOSED RULES 

L8.0FF=(K8•0FF) G:~) (F5) 

+ ('lIF • .,) (F6), where 

Ks.OFF as defined In 4.1.17 toll as defined In 4.1.21 to. as defined In 4.1.20 

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: 

tor systems 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 In 4.1.15 

tor systems numbered 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: 

tor systems numbered 1-8: 

Lr. o~F=Kr. OFF (70-42} G::') (F7) 

where 

KI. OFF as dellned In 4.1.19 

70 as defined In 4.1.4 

,42 as defined In 4.1.15 loll as defined In 4.1.21 to. as de1lned In 4.1.27 

Fl. F8 as defined In 4.1.27 ....8 .... % as defined In 4.1.13 

tor systems numbered 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 unitsX [Ls. ON+Ls. 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 of this Appendix. 

In Btu's per hour ' 

QIN =full·load input rate (Including pilot flame 

fuel Input rate) determined in accordancowlth 

section 3.1 of this Appendix, In Btu's per hour 

Li =jllCket loss determined In IICcordance with 

section 3.4 of this Appendix, In perCMlt L£.A as defined In 4.1.5 to. lIS dellned In 4.1.20 

toll as dellned in 4.1.21 Ls.ON as defined In 4.1.28 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 Annual fuel utilization efficiencY. Calculato the 

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 of non 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 In 4.1.32 

Qp =as defined In 4.1.32 

QIN =as defined In 4.1.32 

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: 

when AD cos O>0.5!1 As: ' 

_ 2.24 [1-AD cos flJ 

D _ As 

.-.J1-[ 1-AD ~~S flT 

when AD cos OS 0.5!1 A3: 

Do=I, 

where 

As=eross sectional area ot tho 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 plane perpendicular to tho !lxls ot tho stack 

4.3 Addillonal Requlremenl, lor Venltc/ lIome lIeallllp 

Equipment UIIZIzlnll Indoor Air lor Combu81/0n and Dra/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 D I' 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 ot flu, 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 

m,. . ( ) 100VT 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 per mlnuto 

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 of mercury 

m,.ss(TF.8S)=[ (RT. F) ;+lJ lI~VA' whero 

Rr., lIS defined In 4.1.2 

AI F lIS defined In 4.1.16 

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 for flue 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: 

tor system number 2: Ds=D p"'O.55 

for system number 4: Ds=Dpd.40 

forsystemnumberS: Ds=(Dp) (D.) 

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

D p as defined in 4.3.1 

D. as defined in 4.2 4.4 Additional Requlr=enl8 for 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 D p determIned in section 4.3.1 of this 

section. . 4.5 Additional R£qulr=enl8 for 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 shall be US?4 to calculate a seasonal efIlciency and an annual operatirig cost which 

is based upon a single:fixed !uellnput rate. 4.6 National Acerll!1e Number oj Burner OperatinIJ Hour!. Calculate the average nnmber of burner operating hours, BOH, defined as: BOH=(A) (2080) (design heating requirement)-B, where - 208O=ustional average annual heating load hours 

design heating requirement 

(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 per hour 

'lIN =as defined in 4.1.32 

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

section 3.1 ot this Appendix, in kilowatts 

11 =1.00 tor vented heaters employing a single motor 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.38 for all other vented heaters. 

'lIN =as defined in 4.1.32 _ 'lp =as defined in 4.1.32 '1. =as defined in 4.1.32 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 defined in 4.1.32 

Qp as defined in 4.1.32 

BOHas defined in 4.6 

8706 as defined in 4.1.33 4.8 Aterll!1e Annual AIUil/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 in 4.6 

BE as defined in 4.6 

11 as defined in 4.6 

BaH as defined in 4.6 

4.9 Acerage Number of Burner OperatlnIJ HOUT8 in 

Different Geograph~ Region! of the Unftcl statu. 

Calculate the average number of burner 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 co hc: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 

Design heating requlremcntCIl:! dcllned In 4.1l 

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

100,000 ' 

where 

100,000 ",Fnctor thnt 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 in 4.1.32 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 

of the Unftcl Statu. CalCu\:lto tha nvtrOC:o nnnU:ll fud 

energy consumpUon by gw.;rophlll re;:!on Cit thn Urilted 

Stetcs, EI',Il, cxpre:::::.."d Ii\.Dtu'speryc:lr,and dclln...<'!1113! 

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

where 

QJG Il3 defined in 4.1.32 

Qp Il3 deJlne-d in 4.1.32 

BOHll Il3 define-!! In 4.!) 

BiGO Il3 defined in 4.1.33 

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 

consumllUon 

tho QVcro.go 

tor dIl1crent 

annU:ll 

sro;:roplllc 

nuxlllary c!ectrl~ 

re;:!= ~ or th~ 

United Stetcs, EAII.It, ~ in kiIoWlltt-hO!ll':l per 

year and deJlne-d Q.S: 

EAU• n= (PE+yBE) (BOHn), 

where 

PE Il3 defined in4.G 

BE Il3 defined in 4.G 

Y Il3 defined in 4.G 

BOHll Q.S defined in 4.9 

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 opcmtlng cast 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 of the CloUd SldU far 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 in 4.0. 

HLH Il3 dcllne-!! in .uI 

DHRuIN IlS defined in 4.12 

B Il3 denlled in 4.9 

43939 

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

'I7hcro 

A Q.S dc1ln.."d in 4.6 mH 113 d:illnOO in 4.9 DHR~.sx Il3 dc1ln.."d in 4.l3 

B 113 !bJln.."d in 4.9 

En, r..Mn:=(Qln-Qp) (BOHll•Mn;) 

'I7hm1 +(8760) (Qp), 

QI. 113 de.fIn:-d In 4.1.33 

Qr 113!bJln.."d in U.32 

BOHe-Ul:: II3!bJln.."d In 4.14 

SW) 113 !bJln.."d in 4.1.33 

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 Stmdmifrd De3f1ll 

H!cllr:] Rez!lUtr:l..'1'.l. cat.'IIl3to th:l a.ergaa annt!3l f1cl 

o:ll!Z\!Y consmnpU!lI1 by gmgraphb reg{on of th3 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) (BOHe.MAX ) 

whuo +(8760) (Qp). 

Qm Il3 d:illIL"d in 4.1;32 

Qp ll3de.fln:din4.1;32 

BOHI!-u.u: 8.3 d:illIL"d in US 

Biro Il3 ~"d in 4.l.33 

4.l8 Acac;~ Al3l3cal AtuUfuru 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 11 V=;:!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=d In kilowatth= per y~ nnd !bJln.."d 8.3: 

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

whuo 

P E 113 dclln..."d in 4.!l 

Y Q.S d~d in 4.6 

BE 113 dclln..od in 4.!! , 

BOHz-Ul:1113 d:illILodln 4.9 

UG Amc;4 Ar.l3c,u AtuUfuru El!drkt:l EP.ag'J CaIlnlofllm fJr VtI3lcl H!7C4 H!din,] :Ep.:.Ipm..om f;;J CeogrcJ:>.~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 ot tha 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 in 4.!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 above factors were developed by the National Bureau of Standards and are based upon information In the public literature, laboratory and computer slmulatlon 

sludies conducted at NBS, and laboratory and field data obtained by several research firms under contract to 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 of burner 

Vaporizing .............. . Power .................. . 

Units without a stack or flue damper 

System DF . No. 

9 

10 

1.00 

• 30 

Outdoor units with a flue damper or Indoor units with a stack damper 

system DF 

No • 

Type of drilt 

11 D. None __________ •• __ •• _ .......... .. 

12 0.30zD. Barometric draft regulator __ ._ ... . Integral draft divertcr.. __ •• ______ • 

SIF 

1 

1.4 

2.4 

NOTE.-The above factors were developed by 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 I rtH-1 I d I 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' II' ~'. ,~", '~I~~ . ", : I ~ I II: ,~I i I I ! I !;.! I "' ' i1t.IIIlfrf!. m II Ii lit . "~'.,.~::: ',,~':': ';~: ,,' " . - . ~., ~ 

II) V'SS'S] "'- .... ,..,,! 

o 

- I .., 

t- LL ." 

Ji ~ 

0 '" s ::;, 

en < 

Ji > < 

0 

.,. 

w 

Z 

0 

w 

.... 0-

~ <I -' 

6 

z 

.,. 

~ 

..i 

-0' 0 

> 

= w 

... 

." 

0 

IU 

II< 

-' 

< 

a:: 

... 

0 

III 

... 
48942 . 

.... 

rl 

rl 

PROPOSED RULES 

~;SS'~l V lD SS'Sl V 

iQ ~ o[il 51 

I 11 I HHHHIHH "1

1 

N;l-l+IHI+I"ttl 1111 III IN ~::~~"=~I"'"'''' iT I+H-t+lt+I+ I+H+-I+t+'I

H lr 

I \1 . I I 

tit 3Un!Ud 

... 

M 

o 

z 
PROPOSED RULES 

FEDERAL REGISTER, VOL. 42, NO. 169-WEDNESDAY, AUGUST 31, 1977 
48944 PROPOSED RULES 

~ &9 i 

mmmilmoomi¥ii ~~_I _ . 

. .. _7 

F,:RH#*'*H¥Hf:T!~H:'H-",;J~i-:i+l·-" ..... , 

m~liI~~~~@~~R~~/:jq:#:M .M 4 

•• 1 ,,,9 

• 

- ---_.'-' .6 

.. 

FEDERAL REGISTER, VOL 42, NO. 169-WEDNESDAY, AUGUST 31, 1977 
PROPOSED RULES 43945 

lo'lGUllli U • ::r , .1107.,1 

FEDERAL REGISTER, VOL 42, NO. 169-WEDNESOAY, AUGUST 31, 1977 
2500 

3500 

FIGURE 9 125 

FIGURE 10 . ,'IOr.K SHEEr FO:!. F1.1'JIACE/BOILER SYST£:I 126 

"MC3surcd QU01ntltlcs .1nd S:n.tc::l Ch3t'actcri:ltic ConstOlnts 

1 2 3 4 5 6 I. 7 8 

SYS~ , T!UEL KIN r B~~~hr. Qp P& , Il& XCg2'S (-) (-) ·Btu/l~.· Stu/hr. k'l k'J' 

I 

9 10 IV 12 13 14 15 16 

TS,SS.X . ~cc2,r Tr,SS TF,OlI(tl) . rF ,ON(t2) 'iF ,OFF(t3) l'r .OFf',t4J T't" a.-tte) F :: F F F F F ., ?t 

- 17 18 19 20 21 22 

~J s/F DF DS (~) , , " (-) (-) .(-) (-) (-) 

Derived System. PQ.ra~QtcrG 

23 24 I 25 26 27 28 2' - PF r-n-l Bt~~r~. , AlF' LL,A • it ~fF Ls,SS I ~Ss' • (-) (-) X T 

This map is reasonably accurate for most parts of the United States but is necessarily highly 

general~ed and consequently not too accurate in mountainous regions. particularly in UIO Rockies. t 

. 

31 

l'S,SS 

F 

_,J> 

C 5 

(-) 

J2 

~OU 

niniltC'fII 

40 

KS•O:1• 

C:>/r 

I 

I 33 34 

IO.·,o.x ~OFF 

F' n{nutl'~ 

I 

I 41 I 42 

'KS (~i/~'O,37 0-' '-rI (%i/~' ON 

I 

I 

35 36 I 3i I j3 

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Calculation of Systcp Losses and Annual Fuel Utl11:atlon S£flci.~ncy 

'44 I 4S I 46 47 4~ 49 I SO ~( ~1 

'0.\ tON I t OFF . tON/~o:: tOFF/TOFF 6F,o tpF,O I I YF F " ointltcs olnutl's • 1-' \ 1-' F F ' F 

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52 53 54 55 56 H ~~ r ,Q '~S,O ~S.CIC 1 I'J F4 fS t'6 F7 -, is F F R 0.37 &-0.63 a ll• 37 R-O. 63 R-O•63 ~-l,63 

, I 

I 6Q 61 I .2 63 f4 65 f& 67 

rs%o~ LS•OFF 1\0:1 L1,OFF "u DD HR EFF\'A 

::: % :: ·F-dolYS hours % 

I -, 

[FE Doc.77-24955 FUed 8-30-77;8:45 am] 

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

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