NlST Proposed Provisions for a Rulemaking on Test 

Procedures for Commercial Water Heaters, Boilers, 

Furnaces, Air Conditioners and Heat Pumps 

FILE Q:\dataiee40\ee-43\43w,mon~\ni~trg,\nidrept.wpd 

October 4 1998 (7:MPM) 

 EE-TP-98-101 COMMENT 08CC

NIST Proposed Provisions for a Rulemaking on Test 

Procedures for Commercial Water Heaters, Boilers, 

Furnaces, Air Conditioners and Heat Pumps 

FILE Q:'<lata\ee-40\ee-43\43common\nasseri\nistrep\nistreptwpd 

October 6, 1998 (7:04PM) 
Table of Contents 

1.0 Background ........................................................ 1 

2.0 Introduction ....................................................... 2 

2.1 April 1998 'tVorkshop .......................................... 2 

2.2 CuventReport ............................................... 2 

3.0 Key Issues and NIST Recommendations ................................. 3 

3.1 Commercial Equipment Sampling. Certification and Enforcement ......... 3 

3.2 Test Protocols for Commercial Water Heaters. Instantaneous Water Heater. 

and Vnfired I-Iot Water Storage Tanks ............................. 6 

3.3 Test Protocols for Commercial "Packaged" Boilers ................... 8 

3.4 Test Protocols for Wan Air Ftmaces ............................ 11 

3.5 Test Protocols for Commerciaf Air Conditioners and Heat Pumps ........ 12 

4.0 Discussions of Proposed Provisions .................................... 13 

3.1 Sampling Certification and Enforcement .......................... 13 

4.1. 1 General Discussions .................................... 13 

4.1.2 Certification Procedures ................................. 15 

4.1.3 Alters~ative Methods for Determining ERciency ................ 16 

3.7.4 Voluntary Independent Certification 13rogram ................. 16 

4.1.5 Enforcement Procedures ................................. 17 

4.1.6 Proposed Sampling Scheme for Enforcement Testing ........... 17 

4.2 Test Protocols for Commercial Water Heaters. and Unfired Hot Water 

StorageTanks .............................................. 18 

4.2.1 General Disc~~ssions .................................... 18 

4.2.2 Com.mercj a1 Water Heater Test Procedure ................... 16 

3.2'3, Commercial 'Ijnfired Storage 'rank 'I'est Procedure ............. 20 

4.2.4 Proposed Test Procedures for Commercial Water Heaters ........ 21 

4.3 Test Protocols for Commercial "Packaged" Boilers .................. 22 

4.3.1 General Discussions .................................... 22 

4.3.2 Test Procedures for Measurement of Energy Efficiency ......... 23 

4.3.3 Packaged Boiler Used As Hot Water Srlpply Boiler ............ 31 

4.3.4 Proposed Test Procedures for Cornmercjal "Packaged Boilers" .... 31 

4.4 Test Protocols for Commercial Furnaces .......................... 32 

4.4.1 General Discussions .................................... 32 

4.4.2 PI SI-RAE 90.3 Referenced Test Standards ................... 32 

4.4.3 Definition of Therrrial Efficiency ........................... 32 

4.4.4 Test Procedures for the Pvfeasurement of Energy Efficiency ....... 33 

4.4.5 Proposed Test Procedures for Commercial Furnaces ............ 33 

FILE Q:Llata\ee4O\ee-43\4bommm\nasseriLusSep\nistrepttwpd 

October 6. 1998 (7:MPM) 

 EE-TP-98-101 COMMENT 08CC

Table of Contents 

1.0 Background ............. ~ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 

2.0 Introduction ....................................................... 2 

2.1 April 1998 \Vorkshop .......................................... 2 

2.2 Current Report . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 

3.0 Key Issues and NIST Recommendations ................................. 3 

3.1 Commercial Equipment Sampling, Certification and Enforcement ......... 3 

3.2 Test Protocols for Commercial Water Heaters, Instantaneous Water Heater, 

and Unfired Hot \Vater Storage Tanks ............................. 6 

3.3 Test Protocols for Commercial "Packaged" Boilers ................... 8 

3.4 Test Protocols for Warm A...ir Furnaces ............................ 11 

3.5 Test Protocols for Commercial Air Conditioners and Heat Pumps ........ 12 

4.0 Discussions of Proposed Provisions .................................... 13 

4.1 Sampling, Certification and Enforcement .......................... 13 

4.1.1 General Discussions .................................... 13 

4.1.2 Certification Procedures ................................. 15 

4.1.3 Altemative Methods for Detennining Eftlciency ............... 16 

4.1.4 Voluntary Independent Certification Program ................. 16 

4.1.5 Enforcement Procedures ................................. 17 

4.1.6 Proposed Sampling Scheme for Enforcement Testing ........... 17 

4.2 Test Protocols for Commercial Water Heaters, and Unfired Hot \Vater 

Storage Tanks .............................................. 18 

4.2.1 General Discussions .................................... 18 

4.2.2 Commercial Water Heater Test Procedure ................... 18 

4.2.3" Commercial Untired Storage Tank Test Procedure ............. 20 

4.2.4 Proposed Test Procedures for Commercial Water Heaters ........ 21 

4.3 Test Protocols for Commercial "Packaged" Boilers .................. 22 

4.3.1 General Discussions .................................... 22 

4.3.2 Test Procedures for Measurement of Energy Efficiency ......... 27 

4.3.3 Packaged Boiler Used As Hot Water Supply Boi1er ............. 31 

4.3.4 Proposed Test Procedures for Commercial "Packaged Boilers" .... 31 

4.4 Test Protocols for Commercial Furnaces .......................... 32 

4.4.1 General Discussions .................................... 32 

4.4.2 ASHRAE 90.1 Referenced Test Standards ................... 32 

4.4.3 Definition of Thermal Efficiency ........................... 32 

4.4.4 Test Procedures for the Measurement of Energy Efficiency ....... 33 

4.4.5 Proposed Test Procedures for Commercial Furnaces ............ 33 

FILE Q:'datalee-40Iee-43143cornmon'nassen'nistrep'nistrept.wpd 

October 6,1998 (7:04PM) 
4.5 Test Protocols for Commercial Air Conditioners and Heat Pumps ........ 34 

4.5.1 General Discussions .................................... 34 

4.5.2 Heat purnps with heating-only function ...................... 34 

4.5.3 Computer room air conditioners ........................... 34 

4.5.4* Proposed Test Procedures for Commercial Air Conditioners and 

HeatRlmps .......................................... 36 

5.0 Milestoile Chart ................................................... 37 

Appendix A: Compliance Certification and Enforcement Sstnpling Proceduses ........ 39 

Appendix B: Sampling :Plan for Enforcement 'Testing ........................... 47 

Appendix C: Commercial Water Hea.ter Test Procedures ........................ 54 

Appendix D: Unfireb I-Iot Water Storage Tanks Test Procedures .................. 57 

Appendix E: Commercial "Packaged" Boiler Test Procedures ..................... 61. 

Appendix F: Commercial Furnace Test Procedures ............................. 63 

Appendix G: Comnlercial Air Conditioners and Heat Rrnlps Test Procedures ......... 65 

FILE Q:~ta\ee-40\ee-43\43comm~Ltiskep~ept.wpd 

October 6. 1998 (7:04PM) 

 EE-TP-98-101 COMMENT 08CC

4.5 Test Protocols for Commercial Air Conditioners and Heat Pumps ........ 34 

4.5.1 

4.5.2 

4.5.3 

4.5.4" 

General Discussions .................................... 34 

Heat pumps with heating-only function ...................... 34 

Computer room air conditioners ........................... 34 

Proposed Test Procedures for Commercial Air Conditioners and 

Heat Pumps .......................................... 36 

5.0 Milestone Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 

Appendix A: Compliance Certification and Enforcement Sampling Procedures ........ 39 

Appendix B: Sampling Plan for Enforcement Testing ........................... 47 

Appendix C: Commercial \Vater Heater Test Procedures ........................ 54 

Appendix D: Unfi.red Hot Water Storage Tanks Test Procedures .................. 57 

Appendix E: Commercial "Packaged" Boiler Test Procedures ..................... 61 

Appendix F: Commercial Furnace Test Procedures ............................. 63 

Appendix G: Commercial Air Conditioners and Heat Pumps Test Procedures ......... 65 

FILE Q:ldatalee-40Iee·43143common'nasseri'nistreplnistrept.wpd 

October 6, 1998 (7:04PM) 
1.0 Background 

Part B of Title flI of the Energy Policy and Conservation Act (TPCA) of 1975, Pub. L. 94-163, 

as amended. by the National Energy Conservation Policy Ad of 1978 (KECPA), Pub I.,. 95-619, 

the National Appliance Energy Consersatio~~ Act of 1987 (NAEC'A), Put?. L. 1 00- 12, the 

Kational Appliance Energy Consen;atioil Amendments of 1988 (NAECA 19881, Pub L. 100-3 57, 

and the Energ Prslicy Act of 1993 (EPAct); Pub L 102-486, established the Energy 

Conservation Program for Consumer Products other than Autornobiles. Pan 3 of Tjt3e liV of 

NECP.4 amei~ded EPGA to add "Energy EfEciency of Industrial Equipment," which includes 

cominercial package air conditioning and heating equipment, packaged terminal air conditioners 

and heat pumps, warm air furnaces, packaged boilers, storage water heaters, instantaneous water 

heaters, and unfired hot .\water storage tanks 

EPAct also amended EPCA -4th respect to these eqtlipment; providing definitions, test 

procedtires, labeling provisions, enerm conservation standards, and compliarlce certii'rcati on 

requirements in various sections. 

The Department of Energy "ns an energy conservatior~ program for consumer products, 

conducted pursuant @ Part B of Title III of EPCA, 32 U.S.C. 6291 - 6309. Under EPCA, the 

consumer appliance standards program essentially consists of three parts: Test Procedures; 

Federal energy conservation standards; certification and enforcement procedures. The program is 

codified in Title 10 of the Code of Federal l<egulatjons, part 430--Energy Conservation Program 

for Consumer Products. 

Since 10 CFR part 430 covers consumer products as disrfitlct from commercial and industrial 

equipment, the Department of Energy is creating a new pan 43 1 in the Code of Federal 

Readations (10 CFR part 43 I), Energy Conservation Program for Commercial and Industrial 

Equipment, to cover certain commercial and industrial eyuipme~tt covered under the Act These 

will include commercial heating and air-cmdirioning equipment atld water heaters This new 

commercial and industrial equipment program will consist of the same elements as the program 

covering consumer products: Test Procedures; Federal energy conservation standards, labeling; 

and certification and enfbrcement. 

FILE Q:~ta\ee-40\ee-43\43commonM\ruskep\nistrept.~d 

October 6,1998 (7:MPM) 

 EE-TP-98-101 COMMENT 08CC

1.0 Background 

Part B of Title III of the Energy Policy and Conservation Act (EpeA) of 1975, Pub. L. 94-163, 

as amended, by the National Energy Conservation Policy Act of 1978 (NECPA), Pub. L. 95-619, 

the National Appliance Energy Conservation Act of 1987 (NAECA), Pub. L. 100-12, the 

National Appliance Energy Conservation Amendments of 1988 (NAECA 1988), Pub. L. 100-357, 

and the Energy Policy Act of 1992 (EPAct), Pub. L. 102-486, established the Energy 

Conservation Program for Consumer Products other than Automobiles. Pari 3 of Title IV of 

NECPA amended EPCA to add' 'Energy Efficiency of Industrial Equipment," which includes 

commercial package air conditioning and heating equipment, packaged terminal air conditioners 

and heat pumps, warm air furnaces, packaged boilers, storage water heaters, instantaneous water 

heaters, and unfired hot water storage tanks. 

EPAct also an1ended EPCA. with respect to these equipment, providing definitions, test 

procedures, labeling provisions, energy conservation standards, and compliance certification 

requirements in various sections. 

The Department of Energy has an energy conservation program for consumer products, 

conducted pursuant to Part B of Title III of EPCA, 42 V.S.c. 6291- 6309. Under EPCA, the 

consumer appliance standards program essentially consists of three parts: Test Procedures; 

Federal energy conservation standards; certification and enforcement procedures. The program is 

codified in Title 10 of the Code of Federal Regulations, part 430--Energy Conservation Program 

for Consumer Products. 

Since 10 CFR part 430 covers consumer products as distinct from commercial and industrial 

equipment, the Department of Enerbl)' is creating a new part 431 in the Code of Federal 

Regulations (10 CFR part 431), Energy Conservation Program for Commercial and Industrial 

Equipment, to cover certain commercial and industrial equipment covered under the Act. These 

win include commercial heating and air-conditioning equipment and water heaters. This new 

commercial and industrial equipment program will consist of the same elements as the program 

covering consumer products: Test Procedures; Federal energy conservation standards; labeling; 

and certification and enforcement. 

1 FILE Q:\datalee-40Iee-43143commoolnasserilnistreplnistrept.wpd 

October 6,1998 (7:04PM) 
2.0 Introduction 

The Depament of Energy (DOE) is currently cfrafting proposed rules to implement the Energy 

Policy and Conservation Act (EPCA), 42 L1.S.C 63 14, provisior~s for energy eficiency test 

procedures and standard compliance concerning cominerciat water heaters, boilers, furnaces, air 

conditioilers and heat pun~ps. While EPCA calls for the adoption of American Sociev of Heating; 

Refrigerating and Air-Conditioning Engineers, hc. (ASHR,E) Standard 90.1, several issues need 

to be resolved concerning how the Standard should be interpreted and applied. 

2.1 April 1998 Workshop 

On April 14 and 15, 1998, DOE cor~veiled a public tvorkshop to solicit fiom interested parlies 

views and informati& that would aid in the deveiopment of these rules, and it requested 

comments on a number of specific issues, including the most appropriate interpretation of 

ASl3XA.E Standard 90.1 as it applies to the covered eyuiprnent, as well as the nlost cost- effective 

and reliable regimes for sampling, certification and enforcement Statements received during the 

public u7orkshop and witten comments afiertvasds have helped to refine the issues involved in 

this rulemaking and have provided useful information contributing to their resolution. 

2.2 Current Report 

Since the April 1998 workshop; DOE and the National Institute for Standards and Technology 

(NIST) have been working together to address the issues and to outline the test methods and 

other provisions that might constitute provisions of the proposed rules. The result is a set of 

recomnlendations by XIST, contained in this report. 

This report is expected to senre as a basis for discussions dtiriilg a second workshop to be held on 

October 13, 1998, in order to elicit fi~rther views and information from interested parties. DOE'S 

objective is to air NIST's recommendatjons, as they appear later in this repox-r, and to seek 

reactions from the pariicipai~ts that will aid in cmsidering whether and in what fom~ to include the 

recom~nendations in the corresponding notices of proposed ruleinaking. 

The discussed issuesoare listed and summarized within Section 3 and detailed discussions of 

individi~al issues appear in Section 4, Proposed Provisions. For each covered product category, 

NIST has developed a discussion of the related issues, followed by recommended uniform test 

methods that reflect staffthinkii~g OII how the issues should be resolved. A subsection also covers 

the compliance ceriification and ellforcement sampling procedures, wllich ~7~uld apply generally 

to all of the equipment categories. A milestone chart, summarizing the steps leading to the 

publication of the final rule and including the projected time line, appears in Section 5. 

The draft CFR language for the test procedures ar~d sampling provisions appear in the 

Appendices. 

FILE Q:\data\ee-lO\ee-43\4Xomon~Lustrep\m'rnept.wpd 

October 6,1998 (7:MPM) 

 EE-TP-98-101 COMMENT 08CC

2.0 Introduction 

The Department of Energy (DOE) is currently drafting proposed rules to implement the Energy 

Policy and Conservation Act (EPCA), 42 U.S.c. 6314, provisions for energy efficiency test 

procedures and standard compliance concerning commercial water heaters, boilers, furnaces, air 

conditioners and heat pumps. While EPCA calls for the adoption of American Society of Heating, 

Refrigerating and Air-Conditioning Engineers, Inc. (ASHRAE) Standard 90.1, several issues need 

to be resolved concerning how the Standard should be interpreted and applied. 

2.1 April 1998 WOI-kshop 

On April 14 and 15, 1998, DOE convened a public \vorkshop to solicit from interested parties 

views and infonnation that would aid in the development of these rules, and it requested 

comments on a number of specific issues, including the most appropriate interpretation of 

ASHRAE Standard 90.1 as it applies to the covered equipment, as well as the most cost- effective 

and reliable regimes for sampling, certification and enforcement. Statements received during the 

public workshop and \witten comments afterwards have helped to reHne the issues involved in 

this rulemaking and have provided useful information contributing to their resolution. 

2.2 Current Report 

Since the April 1998 workshop, DOE and the National Institute for Standards and Technology 

(NIST) have been working together to address the issues and to outline the test methods and 

other provisions that might constitute provisions of the proposed rules. The result is a set of 

recommendations by NIST, contained in this report. 

This report is expected to serve as a basis for discussions during a second workshop to be held on 

October 13, 1998, in order to elicit further views and information from interested panies. DOE's 

objective is to air NISI's recommendations, as they appear later in this report, and to seek 

reactions from the panicipants that will aid in considering whether and in what foml to include the 

recommendations in the corresponding notices of proposed rulemaking. 

The discussed issue&.are listed and summarized within Section 3 and detailed discussions of 

individual issues appear in Section 4, Proposed Provisions. For each covered product category, 

NIST has developed a discussion of the related issues, foHowed by recommended uniform test 

methods that retlect staff thinking on how the issues should be resolved. A subsection also covers 

the compliance certification and enforcement sampling procedures, which would apply generally 

to all of the equipment categories. A milestone chart, summarizing the steps leading to the 

publication of the final rule and including the projected time line, appears in Section 5. 

The draft CFR language for the test procedures and sampling provisions appear in the 

Appendices. 

2 FILE Q:ldata\ee-401ee-43143commonlnasserilnistreplnistrept.wpd 

Ocrober 6.1998 (7:04PM) 
3.0 Key Issues and NHST Recornmendati~ns 

This section contains a summary of key issues discussed during the April 1998 workshop or raised 

in the witten cornmen ts afterwards, along with NNlST recommendatj on concerning each issue. 

Individual issues an8 recommendatj ons are discussed at geater l ength ii~ the nuin bered secai ons 

that are referred. 

3.1 Commercial Equipment Sampling, Certification a13d Enforcensenit 

Co~npliance Certification 

FILE Q:bta\eiZO\ee-43\43comon~~s0epinimept.wpd 

October 6,1998 (7:04PM 

Issire I 

Where sllould testins be performed and by 

whon~? 

e What is the appropriate sample size for each 

product to be tested? 

8 How should sample units be selected? 

a 

KHST Recommendatiun 

* Due to the unique characteristics of 

con~mercial H\iAC &: water heating 

equipment, arr alternative approach to 

the current compliance testing procedure 

for consumer products, is being 

proposeci (See 4.1 1) 

e Adopr a certification plm which 

incorporates the determination of 

efficiency based on testing conducted by 

or for the manilfacturer and reported to 

DOE, either directly or through a 

designated industry organization See 

4.1.2) 

6 NST recommends incorporating a 

provi sj on for volunmry independent 

certification program of covered 

equipment, ilnpleinented at the 

discretion ol DOE. (See 4.1 4) 

* 'I'l~e number of units to be tested, and 

the metliod for determining the mean 

eaciency are left to the discretion of the 

manufacturer. However, alJ test results 

and related anafy sis used in the 

deternlination of the mean must be 

maintained by the manufacturer as a 

permanent record (See 4 1.2) 

* The individual units tested sllatl be 

representative of the basic model, and a 

sufficient number shall be tested to 

ensure &at an accurate estimate of the 

 EE-TP-98-101 COMMENT 08CC

3.0 Key Issues and NIST Recommendations 

This section contains a summary of key issues discussed during the April 1998 workshop or raised 

in the vvntten comments afterwards, along \\1th NIST recommendation concerning each issue. 

Individual issues and recommendations are discussed at greater length in the numbered sections 

that are referred. 

3.1 Commercial Equipment Sampling, Certification and Enforcement 

Compliance Certification 

Issue 

• Where should testing be perfonned and by • 

\vhom? 

• 

<i> 

• 

• What is the appropriate san1ple size for each • 

product to be tested? 

• How should sample units be selected? • <i> 

3 

NIST Recommendation 

Due to the unique characteristics of 

commercial HV AC & water heating 

equipment, an alternative approach to 

the current compliance testing procedure 

for consumer products, is being 

proposed. (See 4.1.1) 

Adopt a certification plan which 

incorporates the detennination of 

efficiency based on testing conducted by 

or for the manufacturer and reported to 

DOE, either directly or through a 

designated industry organization. (See 

4.1.2) 

NIST recommends incorporating a 

provision for voluntary independent 

certification program of covered 

equipment, implemented at the 

discretion of DOE. (See 4.1.4) 

The number of units to be tested, and 

the method for detennining the mean 

efficiency are left to the discretion of the 

manufacturer. However, aU test results 

and related analysis used in the 

determination of the mean must be 

maintained by the manufacturer as a 

pennanent record. (See 4.1.2) 

The individual units tested shall be 

representative of the basic modeL and a 

sufficient number shaH be tested to 

ensure that an accurate estimate of the 

FILE Q:ldata\ee-40Iee-43143common'rulsseri'nistrep'nislrept.wpd 

October 6, 1998 (7:04PM) 
Enforcement Sampling 

* E-Tow should compliance be determined 

from test results, e.g. by employing 

arithmetic averagng or statistical 

confidence intervals? 

* Should derating or other special adjusirnent 

factors be used'? 

* Is simulation testing a valid approach? 

Slt~ould limits be placed on its use'? 

mean efficiency of the basic rnodei can 

be determined. (See 4. I .2) 

* The value for ef3fid ency shall be that 

which the manufacturer detemirmes to be 

the mean for all of the units of that basic 

model, using any valid statistical 

method. and shall be based on the results 

of testing in accordance with the 

applicable test procedure (See 4.1.2) 

o No derating or special adjustments 

recoxnmended. except for the purpose pE 

verification testing. (See 4.1.4) 

* The ej'ficiency sf a basic rnodet could be 

determined using analyti cai procedures 

such as computer modeling or other 

approaches, as long as those grocedtlres 

have been verified and validated using 

testing results. (See 4.1 3) 

Written documentation demonstrating 

the validation of such analytical 

procedures must be maintained as a 

pelmanent record, and must be approved 

by a registered professional engineer. 

(See 4.1.3) 

FILE Q:Llata\ee-40\~ee-43\4k~mon~hskgi\nistrept.wpd 

Octobei 6,1998 (7:04PM) 

Issi~e . * Should the scheme applied in enforcement 

differ from that used for compliance? 

v 

I * Are special provisions needed for very f age 

capacity, site-assembled, or low production 

quantity units' 

Can equipment be grouped as rnjnor 

variations or1 a inore limited number of 

KIST Recommendation 

. Keep essel~tially the same enforcerner~t 

regulations for commercid HVAC & 

water heating equipment as are in place 

for other covered products. ?'he 

exceptions appear in the next issue. (See 

4. 1.5) 

* Allow special provisions for equipment 

which are manufactured in very small 

quantities, or which are very large in 

sj ze 

- If the total number of available units of a 

 EE-TP-98-101 COMMENT 08CC

• How should compliance be determined 

from test results, e.g. by employing 

arithmetic averaging or statistical 

confidence intervals? 

• Should derating or other special adjustment 

factors be used? 

• Is simulation te~ting a valid approach? 

Should limits be placed on its use? 

Enforcement Sampling 

Issue 

• Should the scheme applied in enforcement 

differ from that used for compliance? 

.. 

• Are special provisions needed for very large 

capacity, site-assembled, or low production 

quantity units? 

• Can equipment be grouped as minor 

variations on a more limited number of 

4 

mean efficiency of the basic model can 

be detennined. (See 4.1.2) 

• The value for et11ciency shall be that 

which the manufacturer detem1ines to be 

the mean for all of the units of that basic 

model, using any valid statistical 

method, and shall be based on the results 

of testing in accordance with the 

applicable test procedure. (See 4.1.2) 

• No derating or special adjustments 

recommended, except for the purpose pf 

verification testing. (See 4.1.4) 

• The efficiency of a basic model could be 

determined using analytical procedures 

such as computer modeling or other 

approaches, as long as those procedures 

have been verified and validated using 

testing results. (See 4.1.3) 

• Written documentation demonstrating 

the validation of such analytical 

procedures must be maintained as a 

permanent record, and must be approved 

by a registered. professional engineer. 

(See 4.1.3) 

NIST Recommendation 

• Keep essentially the same enforcement 

regulations for commercial HV AC & 

water heating equipment as are in place 

for other covered products. The 

exceptions appear in the next issue. (See 

4.1.5) 

• Allow special provisions for equipment 

which are manufactured in very small 

quantities, or which are very large in 

size. 

- If the total number of available units of a 

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October 6, 1998 (7:04PM) 
FILE Q:~tl\ee-4O\ee-43\43commm~seriLu~trep~s(rep~d 

October 6,1998 (7:04PM) 

basic models? lf' so, how many modeis need 

to be tested, and what is the best way to 

extrapolate the results to other equipment 

~4 thirr a group? 

Should the enfotcement sampling pl an be 

used to deternine the validity of labeling 

representations? 

basic mode[ involved in an eitlforcemei~t 

action is less than four, then all of the 

units shall be tested f See 4. l .S) 

- ian exception would be available for 

veiy large units on a case-by-case basis. 

such that only a single tlnit would be 

tested.(Sce 4 1.5) 

* Not an issue in the absence of a labeling 

rule. 

 EE-TP-98-101 COMMENT 08CC

basic models? If so, how many models need 

to be tested, and what is the best way to 

extrapolate the results to other equipment 

v,rithin a group? 

• Should the enfol-cement sampling plan be 

used to detem1ine the validity oflabeling 

representations? 

5 

basic model involved in an enforcement 

action is less than four, then all of the 

units shall be tested. (See 4.1.5) 

- A.n exception would be available for 

• 

very large units on a case-by-case basis, 

such that only a single unit would be 

tested.(See 4.1.5) 

Not an issue in the absence of a Jabeling 

rule. 

FILE Q:ldatalee-40Iee.43143connnon'nasserilnistreplnistreptwpd 

October 6,1998 (7:04PM) 
3.2 Test P rotoccels for Commercial Water Heaters, Instantaneous Water Heaters, and 

Unfired Hot Water Storage Tanks 

Clarific.ation of Coverage and Definitions 

6 FILE Q:\data\ee-40\ee-43\4Xommon~\nisaep~sfleptptwpd 

Octoba 6,1998 (7:04PM) 

issue 

e General: iVould it be beneficid to include a 

table similar in format to Table 7.2.2 of 

90 1 R in the proposed rule in order to 

clarify the categories of coverage for 

commercial water heaters'? 

* Ge~erat. ANSI 221.15 3-1990 has been 

revised The current version, 22 1 .10.3- 

1993, contains no modification of the test 

procedures for thennal efficiency and 

standby loss. Should the reference to this 

test procedure in Table 1 1 1 be updated to 

the 1993 version? 

Electric Storage Water Heaters: Ts there 

any reason why the ANSI: test procedure 

should not be applicable to electric storage 

water heaters with input ratings between 12 

and 22 kN1? 

* Gas-Fired Instantaneous Water Heaters. 

Should Table 1 1. 1 be clarified to indicate 

that on1 y gas-fired insxantaneous water 

heaters with input ratings greater than 

200,000 B&'h are EPAct-covered 

equipment3 

* Oil-Fired Instar~taneous Water Heaters: 

S11ould Table 1 1.1 be clarified to indicate 

that all oil-fired instantaneous water heaters 

with input ratings greater than 21 0,000 

Btu:'h are EPAct-covered equipment'? 0 

NIIST Recamrnendatisra 

e rZ table will be provided to shour EPActcovered product and requirements as is 

done in 10 CFR 430 subsection 32 

e ANSI 22 1.10.3- 1993 incorpora~e by 

reference as indicated by ASHRAE 

Standard 90.1-1 989 Addendum n. 

* No. 

Instantaneous u7ater heaters designed to 

heat water to temperatures of 180°F or 

higher may be subjecxed to Be energy 

consen~ation standards of conmitnercid 

equipment regardless of the input rating. 

(See 4.2 2) 

Ii~stantaneous water heaters designed to 

heat water to temperatures of 180°F or 

higher may be subjecxed to the energy 

cortsen~atioa startdards of comntercid 

equipment regardless of the input rating 

(See 4.2.2) 

 EE-TP-98-101 COMMENT 08CC

3.2 Test Protocols for Commercial Water IIeaters, Instantaneous Water Heaters, and 

Unfired Hot Water Storage Tanks 

.. 

Clarification of Coverage and Definitions 

Issue 

• General: \Vould it be beneficial to include a 

table similar in format to Table 7.2.2 of 

90.1 R in the proposed rule in order to 

clarify the categories of coverage for 

commercial water heaters? 

• General: ANSI Z21.1O.3-1990 has been 

revised. The current version, Z21.1 0.3-

1993, contains no modification of the test 

procedures for thermal efficiency and 

standby loss. Should the reference to this 

test procedure in Table 11.1 be updated to 

the 1993 version? 

• Electric Storage Water Heaters: Is there 

any reason why the ANSl test procedure 

should not be applicable to electric storage 

water heaters with input ratings between 12 

and 22 kW? 

• Gas-Fired Instantaneous Water Heaters: 

Should Table 11.1 be clarified to indicate 

that only gas-fired instantaneous water 

heaters with input ratings greater than 

200,000 BtuJh are EPAct..:covered 

equipment? 

• Oil-Fired Instantaneous Water Heaters: 

Should Table 11.1 be clarified to indicate 

that all oil-fired instantaneous water heaters 

vvith input ratings greater than 210,000 

Btu!h are EPAct-covered equipment? .. 

6 

• 

• 

• 

• 

• 

NIST Recommendation 

A table will be provided to show EPActcovered product and requirements as is 

done in 10 CFR 430 subsection 32 

ANSI Z21.10.3-1993 incorporate by 

reterence as indicated by ASHRAE 

Standard 90.1-1989 Addendum n. 

No. 

Instantaneous water heaters designed to 

heat water to temperatures of 180°F or 

higher may be subjected to the energy 

conservation standards of commercial 

equipment regardless of the input rating. 

(See 4.2.2) 

Instantaneous water heaters designed to 

heat water to temperatures of 180 OF or 

higher may be subjected to the energy 

conservation standards of commercial 

equipment regardless of the input rating. 

(See 4.2.2) 

FILE Q:\datalee-40Iee-43143<:onnnon'rulsserilnistreplnistrept.wpd 

October 6, 1~8 (7:04PM) 
Standby L.oss Testing 

8 Commercial Water Heater or Packaged 

Boiler: Which test procedure, if any, shoulrl 

be used to test boilers as commercial water 

heaters? 

Based on comments by CEC and 

GmW MST recomn~encfs that if a 

packaged boiler is used to supply service 

hot water, it should be tested and rated 

as a hot water heater for its thermal 

efficiency rating. If the same boiler is 

used for space heating purpose, it should 

be tested as a packaged boiler for its 

combustion efficiency rating. (See 4.2.2) 

Unfircd Storage Tanks 

Issue 

Should the R-value be considered to be an 

"effective" R-value which '~11ould account 

for heat losses through the insulation due to 

thermal bxidges? 

NIST Recommendation 

No ( See 4.2.3) 

FILE Q:brake4O\ee-43\43conrmon~~~~treptnirnept.wpd 

octoba 6, 1998 (7:04PM) 

Issue 

What test procedures are available for use 

in detenniniag Ole rate of heat 'loss per 

square foot of tank surface area? 

If procedures are available, which should 

DOE require? It' not, is a new procedure 

needed'! 

Nf ST Recommendatior~ 

e None were identified dul"ing the 

workshop. 

* MST is developing one based on ANSI 

221 10.3-1993. 

 EE-TP-98-101 COMMENT 08CC

• Commercial Water Heater or Packaged 

Boiler: Which test procedure, if any, should 

be used to test boilers as commercial water 

heaters? 

Standby Loss Testing 

Issue 

• Should the R-vmue be considered to be an 

"effective" R-value which would account 

for heat losses through the insulation due to 

thermal blidges? 

Unfired Storage Tanks 

Issue 

• What test procedures are available for use 

in detennining the rate of heat loss per 

square foot of tank surface area? 

• If procedures are available, which should 

DOE require? If not, is a new procedure 

needed? 

7 

• Based on comments by CEC and 

GMfA, NlST recommends that if a 

packaged boiler is used to supply service 

hot water, it should be tested and rated 

• 

• 

• 

. as a hot water heater for its thermal 

efficiency rating. If the same boiler is 

used for space heating purpose, it should 

be tested as a packaged boiler for its 

combustion efficiency rating. (See 4.2.2) 

NIST Recommendation 

No. (See 4.2.3) 

NIST Recommendation 

None were identified during the 

\vorkshop. 

NlST is developing one based on .A.l~SI 

Z21.10.3-1993. 

FILE Q:ldata\ee-40Iee·43143common'nasserilnistreplnistrept.wpd 

October 6, 1998 (7:04PM) 
3.3 Test Protocols for Commercial "Packaged" Boilers 

Definition 0f"Packa~ed Boilei' 

Combustion Efficiencv; Jacket Losses 

Issue 

* Is the EPACT's definition for packaged 

boiler clear enough? To what extent, if any, 

are custom-designed, field-assembled 

boilers excluded? Is a size limit implicit in 

the definition of "commercial packaged 

boiler." artd if so what is the lnaxin~~arn 

capaci tya7 

PU' EST Recon~mendation 

NST believes that the definition of a 

packaged boiler is clear enougf.~ to 

exclude custanl-desiga (for a specific 

installation), field-constructed (as 

opposed to a re-assembly of major 

sub-assemblies disassembled hr shipping 

purpose) boiler system While the size is 

not implicit, the rille should be confined 

to low-pressure boilers. (See 4.3.1) 

FILE Q:Llata\ee40\ee-43\4kommon~\nishep\nish.ept.wpd 

October 6,1998 (7:04PM) 

1 ss oe 

Efficiency: AS&E PTC4 f includes 

parasitic electric energy in its eMiciency 

calculation. Shout d parasitic electric enera 

be considered in cornbustion efficiency? 

* Jacket Loss: NSt all the ,4Sm 90.1- 

1989 referenced test standards include lest 

and calculatici~ methods fur jacket loss 

Only AShE PTC 4 1 provides a graph for 

jacket loss and a test method also. (1) If a 

jacket loss term is needed, should a single 

method be selected for jacket loss test' (2) 

Should laboratory test results be adjusted to 

(average ?) outdoor conditions? 

NIST Recommendation 

NST rec~infnends that parasitic electric 

energy be ignored as heat input in 

combustion et'ficiency calculation 

* Since the referenced test proceriures 

(ANSI 221 13 and 131 Std -1989) for 

low-pressure steam and hot water 

boilers do not include jacket loss test, 

and the calculation ofthe combustion 

eficiency does not require the term 

jacket loss, KIST reco~nmends that 

- jacket loss (radiation loss in ASME PTC 

4.1) test not be required in the test 

procedure 

 EE-TP-98-101 COMMENT 08CC

3.3 Test Protocols for Commercial "Packaged" Boilers 

Definition of "Packaged Boiler" 

Issue 

• Is the EPACT's definition for packaged 

boiler clear enough? To what extent, if any, 

are custom-desi~ned, field-assembled 

boilers excluded? Is a size limit implicit in 

the definition of "commercial packaged 

boiler," and if so \vhat is the maximum 

capacity? 

Combustion Efficiency; Jacket Losses 

Issue 

• Efficiency: ASIYfE PTC4.1 includes 

parasitic electric energy in its efficiency 

calculation. Should parasitic electric energy 

be considered in combustion efficiency? 

• Jacket Loss: NOt all the ASHRAE 90.1-

1989 referenced test standards include test 

and calculation methods for jacket loss. 

Only ASn.1E PTC 4.1 provides a graph for 

jacket loss and a test method also. (1) If a 

jacket loss tenn is needed, should a singJe 

method be selected for jacket loss test? (2) 

Should laboratory test results be adjusted to 

(average ?) outdoor conditions? 

8 

• 

• 

• 

NIST Recommendation 

NIST believes that the definition of a 

packaged boiler is clear enough to 

exclude custom-design (for a specific 

installation), Held-constructed (as 

opposed to a re-assembly of major 

sub-assemblies disassembled for shipping 

purpose) boiler system. While the size is 

not implicit, the rule should be confined 

to low-pressure boilers. (See 4.3.1) 

NIST Recommendation 

NIST recommends that parasitic electric 

energy be ignored as heat input in 

combustion efficiency calculation. 

Since the referenced test procedures 

(ANSI Z21.13 and HI Std.-1989) for 

low-pressure steam and hot water 

boilers do not include jacket loss test, 

and the calculation of the combustion 

efficiency does not require the tenn 

jacket loss, NIST recommends that 

jacket loss (radiation loss in ASIvfE PTC 

4.1) test not be required in the test 

procedure. 

FILE Q:\data\ee-40\ee-43\43common\nasseri'nistreplnistrept.wpd 

October 6,1998 (7:04PM) 
Uniformity of Test Conditions, Test Setup, and Procedures 

Issue 

8 There are differences among the various 

referenced test standards. In cases where 

more tfim one procedure is applical3le to 

the same product, do the different 

procedures yield the same result? If not, 

which procedure is the sounder it) each 

instance? 

N [;I;;$ Recon~mendation 

* NST recommends that the HI-1989 

standard be referenced as a single 

uniform DOE test standard for 

commercial, packaged, gas and oil fired, 

low-pressure steam and hot water 

boilers for space heating application, 

uiitfi the provision that the inlet wxer 

temperature for hot water boilers be 

specified at 80 ilO"F and the outlet 

water temperature for hot water boilers 

be set at 180 h2"F as specified in ANSI 

221.13-1993a. (See 4.3.2). 

* For flue gas temperature measurement, 

should a 9-them~ocoupte grid be an option 

instead of the single temperature sensor 

measured successively at 9 points? To 

obtain a more atcurate flue gas temperature 

for the flue loss method, should insulation 

of the flue pipe up to the temperature 

measurement plane be requiredf? 

NXST recommends that the T-31-1989 

standard be referenced as a single 

uniform DOE test standard for 

con~mercial, packaged, gas and oil fired, 

Iolv-pressure steam and hot water 

boilers for space heating applicarion 

which specifies the tllermocouple grid 

for flue gas temperature measurement 

and the insulation of the flue pipe. 

Provisions for Other Desim Features 

Issue 

* Should two test conditions with respect to 

water inlet and outlet temperatures be 

specified for hot water boilers for high 

temperature and low temperature 

applications? 

I None of the referenced test standards 

specify a test procedure for condensing 

boilers. Should a test procedure for flue 

condensate measurement be developed for 

condensing boilers? If so, should the 

NIST Recommendation 

* NIST agrees with the comments from 

the workshop attendees and does not 

recoinmend a different set of test inlet 

and outlet water temperatures for 

applications that require a low supply 

and return temperature setting. (See 

4.3.2) 

* NIST recommends that the test 1 

procedure (under steady-state condition) I 

for flue condensate measurement as 

specified in ASHiC4E 103- 1993 be 

offered as an optional test procedure for ] 

9 FILE Q:Idata\eedO\ee-43\4komm~\nisbep\nirne~.wpd 

October 6, 1998 (7:04PM) 

 EE-TP-98-101 COMMENT 08CC

Unifoffi1ity of Test Conditions, Test Setup, and Procedures 

Issue 

• There are differences among the various • 

referenced test standards. In cases where 

more than one procedure is applicable to 

the same product, do the different 

procedures yield the same result? If not, 

which procedure is the sounder in each . '] mstance. 

• For flue gas temperature measurement, • 

should a 9-themlOcouple grid be an option 

instead of the single temperature sensor 

measured suc.cessively at 9 points? To 

obtain a more accurate flue gas temperature 

for the flue loss method, should insulation 

of the flue pipe up to the temperature 

measurement plane be required? 

Provisions for Other Design Features 

Issue 

• Should two test conditions with respect to • 

water inlet and outlet temperatures be 

specified for hot water boilers for high 

temperature and low temperature 

applications? 

• None of the referenced test standards • 

specify a test procedure for condensing 

boilers. Should a test procedure for flue 

condensate measurement be developed for 

condensing boilers? If so, should the 

9 

NIST Recommendation 

NIST recommends that the HI -1989 

standard be referenced as a single 

uniform DOE test standard for 

commercial, packaged, gas and oil fired, 

low-pressure steam and hot water 

boilers for space heating application, 

with the provision that the inlet water 

temperature for hot water boilers be 

specified at 80 ±lO°F and the outlet 

water temperature for hot water boilers 

be set at 180 ±2 0 F as specified in ANSI 

Z21.13-1993a. (See 4.3.2). 

NIST recommends that the H]-1989 

standard be referenced as a single 

uniform DOE test standard for 

commercial, packaged, gas and oil fired, 

low-pressure stearn and hot water 

boilers for space heating application 

which specifies the thermocouple grid 

for flue gas temperature measurement 

and the insulation of the flue pipe. 

NIST Recommendation 

NIST agrees vvith the comments from 

the workshop attendees and does not 

recommend a different set of test inlet 

and outlet water temperatures for 

applications that require a low supply 

and return temperature setting. (See 

4.3.2) 

NIST recommends that the test 

procedure (under steady-state condition) 

for flue condensate measurement as 

specified in ASHRAE 103-1993 be 

offered as an optional test procedure for 

FILE Q:'datalee-40Iee-43143comrnonlnasseri'Jristrep'Jristrept.wpd 

October 6, 1998 (7:04PM) 
FILE Q:\data\ee-40\ee-43\43Comm~Lustrepinistrept.wpd 

October 6, 1998 (7:04PM) 

procedure in ASHiIAE 1 03- 1993 be 

considerediadopted? 

* Should DOE adopt the two rating 

conditions (at the maximum and the 

minimum input rates) for modulating boilers 

as specified in -4SHRAE 90 1 - f 989 

* Should a single boiler be tested for a 

modular boiler assernbfy? 

o 

* Should a hot water/steani boiler be tested 

on steam only3 

condensing boilers 

* It is NXST's understanding that DOE 

agrees with the comments from the 

workshop that since the statute only 

requires rating at the rated input, only 

testing at the rated input sftall be 

required 

* MST recommends that for tliose types 

of commercial packaged boiler 

installations, a single boiler from the 

assembly be tested and its efficiency be 

applied as the efficiency rdting of the 

boiXer assembly. (See 4.3.2) 

e NIST is proposing &at manufacturers be 

allowed the option of reporting the 

efiicier~cy rating of a steam and hot 

water boiler from the test result obtained 

by nesting the boiler as a steanl boiler. 

(See 4.3 2) 

 EE-TP-98-101 COMMENT 08CC

procedure in ASHRAE 103-1993 be 

considered/adopted? 

• Should DOE adopt the two rating • 

conditions (at the maximum and the 

minimum input rates) for modulating boilers 

as specified in ASHRAE 90.1-1989? 

• Should a single boiler be tested for a • 

modular boiler assembly? 

~ 

• Should a hot waterlsteanl boiler be tested • 

on steam only? 

10 

condensing boilers. 

It is NIST's understanding that DOE 

agrees with the comments from the 

workshop that since the statute only 

requires rating at the rated input, only 

testing at the rated input shall be 

required. 

NIST recommends that for those types 

of commercial packaged boiler 

installations, a single boiler from the 

assembly be tested and its efficiency be ~ - applied as the efficiency rating of the 

boiler assembly. (See 4.3.2) 

NIST is proposing that manufacturers be 

allowed the option of reporting the 

efficiency rating of a steam and hot 

water boiler from the test result obtained 

by testing the boiler as a steam boiler. 

(See 4.3.2) 

FILE Q:\data\ee-40\ee-43\43common\nasserilnistreplnistrept.wpd 

October 6. 1998 (7:04PM) 
3.4 Test Protocols for Commercial Warm Air Furnaces 

Themla1 vs. Coinbustion EfEciei~cy; Jacket Losses 

Provisions for 0the;~esian Features 

Iss tie 

0 Eficiencv: In cases where EP,it,CT 

specifies thermd efEciency and the 

referenced test procedures listed in 

ASHUE 90.1 measure combustion 

efficiency, should DOE repire a procedure 

to measrire thermal efficiency as 

OUTPUT!INPUT, or should it specify a 

method for correcting combustion 

efficiencies witti jacket losses to obtain 

themla1 eff~ciencies? Should the term 

"thermal eficiency" be taken in practice to 

mean the same thing as combustion 

efficiency, as prescribed by ANSI 221.47- 

19939 

o Jacket Loss: ANSI Z21.47 provides a test 

procedure to measure j acket loss. Should 

laboratory test results be adjusted to 

(average 7) outdoor con did ons? 

KIST Recommendation 

0 As per DOE, the statute defines the 

energ descriptor for a commercial 

tvam air furrtace as the thermal 

efiiciency and it should not be changed, 

therefore MST recolnmends that, DOE 

define the term thermal ef'ficiency for a 

commercial warm air f'urnace as 1000/6 

minus the percent flue loss, as prescribed 

in the referenced ANSI 22 1.17. (See 

4.4.3) 

Based on the comments fmm the 

workshop attendees, MST recomme~~ds 

that no adjustment to outdoor condition 

be rnade to the jacket loss test procedure 

as prescribed in ANSI 221.47 

11 FILE Q:Lkh\ee40\ee-43\4kom0n~hsb:ephstrept.wpd 

October 6,1998 (7:04PM) 

f ssue 

* Should DOE? adopt the two rating 

conditions (at the maximum and the 

ininin~urn input rates) for modulating 

furnaces as specified in ASHR,4E 90.1- 

1988? 

0 None of the referenced test standards 

specify test procedure for conden si ag 

hrnaces. Should a test procedure for flue 

condensate measurement be developed for 

condensing furnaces '? If so, should the 

procedure in ASHRAE 103- I 993 be 

considered/adopted'? 

NLST Recorninnendation 

It is NIST's understanding that DOE 

agrees with the comments from the 

worksl~op that since the statute only 

reyuires rating at the rated input, only 

testing at the rated input shall be 

required. 

0 NST recommends that the test 

procedtrre (under steady -state condition) 

for flue condensate measurement as 

specified in ASHR,@ 1103- 1993 be 

offered as an optional test procedure for 

condensing f'urnaces 

 EE-TP-98-101 COMMENT 08CC

3.4 Test Protocols for Commercial 'Varm Air Furnaces 

Thernlal vs. Combustion Efficiency; Jacket Losses 

Issue 

• Efficiency: In cases \vhere EPACT 

specifies thermal efliciency and the 

referenced test procedures listed in 

ASHRAE 90.1 measure combustion 

efficiency, should DOE require a procedure 

to measure thermal efficiency as 

OUTPUTIINPUT, or should it specify a 

method for correcting combustion 

efficiencies with jacket losses to obtain 

thermal efficiencies? Should the term 

"thermal efficiency" be taken in practice to 

mean the same thing as combusti on 

efficiency, as prescribed by ANSI Z21.47-

19937 

• Jacket Loss: ANSI Z21.47 provides a test 

procedure to measure jacket loss. Should 

laboratory test results be adjusted to 

(average 7) outdoor conditions? 

~ 

Provisions for Other Design Features 

Issue 

• Should DOE adopt the two rating 

conditions (at the maximum and the 

minimum input rates) for modulating 

furnaces as specified in ASHRAE 90.1-

19897 

• None of the referenced test standards 

specify test procedure for condensing 

furnaces. Should a test procedure for flue 

condensate measurement be developed for 

condensing furnaces 7 If so, should the 

procedure in ASHRAE 103-1993 be 

considered/adopted? 

11 

• 

• 

• 

• 

NIST Recommendation 

As per DOE, the statute defines the 

energy des('TIptor for a commercial 

\vrunl air fumace as the thermal 

efficiency and it should not be changed, 

therefore NlST recommends that, DOE 

define the term thermal efficiency for a 

commercial warm air furnace as 1 OO~·o 

minus the percent flue loss, as prescribed 

in the referenced ANSI Z21.47. (See 

4.4.3) 

Based on the comments from the 

workshop attendees, NIST recommends 

that no adjustment to outdoor condition 

be made to the jacket loss test procedure 

as prescribed in ANSI Z21.47. 

NIST Recommendation 

It is NISI's understanding that DOE 

agrees with the comments from the 

workshop that since the statute only 

requires rating at the rated input, only 

testing at the rated input shall be 

required. 

NIST recommends that the test 

procedure (under steady-state condition) 

for flue condensate measurement as 

specified in ASHRAE 103-1993 be 

offered as an optional test procedure for 

condensing furnaces. 

FILE Q:'datalee-40Iee-43143connnon'nasserilnistreplnistrept.wpd 

October 6, 1998 (7:04PM) 
3.5 Test Protocols f%r Commerciall Air Conditioners and Heat Pumps 

"Heating Onlv" Heat Pumps 

Issue 

8 Are "Heating Only" heat pumps covered 

equipment? 

NISI' Reconlmendstion 

NST observes that tho statute does not 

cover this equipment. This 

determination is of little practical 

consequence because heatjng-only heat 

pumps arc neither atrailable on the U.S. 

market a1 this time nor are expected any 

time soon. (See 4.5.2) 

Computer Room Aj r Conditioners 

I Essue 

Are computer room air conditiorlers 

covered equipment? 

NlST Recommendation 

NIST observes that these equipment are 

special purpose equipment with distinct I 

design features and are not covered, 

when used primarily for cooling 

computers (see 4.5.3) 

FILE Q:~ta\ee-40\ee-43\43commLtasSaiLtistr~\nistreptptwpd 

October 6, 1998 (7:04PM) 

 EE-TP-98-101 COMMENT 08CC

3.5 Test Protocols for Commercial Air Conditioners and Heat Pumps 

"Heating Only" Heat Pumps 

Issue 

• Are "Heating Only" heat pumps covered • 

equipment? 

Computer Room Air Conditioners 

Issue 

• Are computer room air conditioners • 

covered equipment? 

12 

NIST Recommendation 

NIST observes that the statute does not 

cover this equipment. This 

determination is oflittle practical 

consequence because heating-only heat 

pumps are neither available on the US. 

market at this time nor are expected any 

time soon. (See 4.5.2) 

NIST Recommendation 

NIST observes that these equipment are 

special purpose equipment with distinct 

design features and are not covered, 

when used primarily for cooling 

computers (see 4.5.3) 

FILE Q:ldatalee-40Iee-43143common'nasseri'nistrep'nistrept.wpd 

October6, 1998 (7:04PM) 
4.0 Discussion of Proposed Provisions 

4. P Sampling, Certification and Enforcement 

4.1.1 General Discussions 

The purpose of establishing regulations concerning certification and enforcement is to provide a 

basis for assuring that covered commercial EIVAC 8s water heating equipment which are certified 

as being in conformance with applicable energy conservation standards actually con~ply u.irh those 

standards. 

KIST recommends a set of provisio~~s concerning complianc,e certification and enforcement 

procedures for covered commercial equipment. Compliance with energy conservation stancfarcis 

would be assured in part by having each manufacturer certify thar its covered equipmsrlt compiiss 

with the applicable energy col~servation standards. In addition. enforcement procedures would be 

specified for use in 6solving any disputed performance claims for covered equipment. 

For consumer products, the test procedure for each class of equipment incorporates a sampling 

plan designed to give a reasonable assurance that the true mean perfomlance of the equipment 

being manufactured and sold meets or conforms to the DOE enerjg eficiency standard. The 

mean performance is selected as the critical performance characteristic of covered equipment 

because it deternlines the overall energy usage of a covered equipment population, and thus the 

impact of the equipment on national energy consumption. 

Individual units produced fion~ asingle design may vary in energy eficiency for a number of valid 

reasons, including variability in manufacturing and testing. The risk to the put>Bic or purchasing a 

non-complying unit, and the burden on tile manufacturer in conducting pe~for-mance testing, nlust 

be balanced to provide adequate protection for the public without imposing an excessive testing 

burden on the manufacturers. 

Given that perfomlance testing of every unit of a covered product would be prohibitively 

expensive and time-consuming, the average performance of the basic model must be estimated 

through evaluation ofa sample drawn from the population. 'The method by which estimation 

of equipment performance is derived from a small sample of a large population is called a 

sampling plan. 

Prior to the DOE workshop in April, NIST anticipated that compliance certification and 

enforcement sampling procedures fbr commercial equipment would be similar to those established 

in the past for consumer products. These require manufacturers to certify compliance based on 

testing under strictly prescribed statistical sampling schemes designed to assure, with reasonable 

probability, that the average efficiency of each product sold meets the applicable standard. 

Enforcement involves a similar, but not identical statistical sampling arrangement. The advantage 

of this approach is that mar~ufacturers can provide adequate assurance of compliance willlout 

having to incur the cost of testing every single unit they produce. 

When presented with the concept of applying a prescribed statistical sampling method to 

certifying commercial equipment, participants at the workshop made three general observations: 

FILE Q:bta\ee-40\ee-43\43comm~\nisrrep~strept.wpd 

October 6,1998 (7:MPM) 

 EE-TP-98-101 COMMENT 08CC

4.0 Discussion of Proposed Provisions 

4.1 Sampling, Certification and Enforcement 

4.1.1 General Discussions 

The purpose of establishing regulations concerning cenification and enforcement is to provide a 

basis for assuring that covered commercial HV AC & \vater heating equipment which are certified 

as being in conformance with applicable energy conservation standards actually comply with those 

standards. 

]\(lST recommends a set of provisions concerning compliance certification and enforcement 

procedures for covered commercial equipment. Compliance with energy conservation standards 

would be assured in part by having each manufacturer certify that its covered equipment complies 

with the applicable energy conservation standards. In addition, enforcement procedures would be 

specified for use in resolving any disputed performance claims for covered equipment. 

For consumer products, the test procedure for each class of equipment incorporates a sampling 

plan designed to give a reasonable assurance that the true mean performance of the equipment 

being manufactured and sold meets or conforms to the DOE energy efficiency standard. The 

mean performance is selected as the critical performance characteristic of covered equipment 

because it deternlines the overall energy usage of a covered equipment population, and thus the 

impact of the equipment on national energy consumption. 

Individual units produced from a single design may vary in energy efficiency for a number of valid 

reasons, including variability in manufacturing and testing. The risk to the public of purchasing a 

non-complying unit, and the burden on the manufacturer in conducting pelformance testing, must 

be balanced to provide adequate protection for the public without imposing an excessive testing 

burden on the manufacturers. 

Given that perfomlance testing of every unit of a covered product would be prohibitively 

expensive and time-consuming, the average performance of the basic model must be estimated 

through evaluation of a sample drawn from the population. The method by which an estimation 

of equipment performance is derived from a small sample of a large population is called a 

sampling plan. 

Prior to the DOE wockshop in April, NIST anticipated that compliance certification and 

enforcement sampling procedures for commercial equipment would be similar to those established 

in the past for consumer products. These require manufacturers to certify compliance based on 

testing under strictly prescribed statistical sampling schemes designed to assure, with reasonable 

probability, that the average efficiency of each product sold meets the applicable standard. 

Enforcement involves a similar, but not identical statistical sampling arrangement. The advantage 

of this approach is that manufacturers can provide adequate assurance of compliance without 

having to incur the cost of testing every single unit they produce. 

When presented with the concept of applying a prescribed statistical sampling method to 

certifying commercial equipment, participants at the \vorkshop made three general observations: 

13 FILE Q:ldata\ee-40\ee·43\43commonlnasseri\nistrep\nistrept.wpd 

October 6, 1998 (7:04PM) 
e A workable unifom san~pling method covering the uide variety of commerciai equipment 

woufd be diflicuft, if not impossible to formulate. This is due to the large number of design 

variations and small numbers of identical units for some equipment. 

a The State of California and several voluntarq. industql associations already have effective 

efficiency certification programs in place that leave the sample design to the manufacturer. 0 

a R7ith adequate independent verification and penalties for improper certification, 

prescribing the sampling scheme is unnecessary. since the manuiidctnrers will have an 

incentive to design one that limits the risk of being caught out ofcompljance. 

\Vilfi these observations in mind, N ST investigated the certification programs of the State of 

California, the Air Conditioning and Refrigeration Institute, the Gas Appliance Manuhcturers' 

Association, and the Hydro~lics Institute. All of these programs entail some form of independent 

verification or supervision of tests canied out by the manufacturer, and each contains pemlties 

that appear adequate for the purposes of assuring that testing would occur, and that certified 

eMiciencies would be reliable. On the other hand, some manufacturers do not participate in 

voluntary industry programs, and no progain exists at present for commercial iiu-naces, so DOE 

would need its own certification testing and verification arrangement, at least for equipment not 

otherwise covered 

NTST therefore recommends that DOE require manufacturers to certify compliance based on 

testing under a prescribed sampling scheme or on testing performed under DOE approved 

voluntary independei~t certification pro, arms. 

The operating procedures of three existing industry certification programs are summarized be1 ow: 

o For commercial air conditioners, the program is operated by the Air-Conditioning and 

Refrigeration" Institute (ARI). This is a vduntary program that all ows participating 

manufac~urers to certify the perfomance of their equipment. and which conducts periodic 

veiification testing of perlbrmai~ce claims. Equipment perfomance values are listed in a 

directory that is available to the public. The existence of this industrq. program increases 

the likelihood tkat energy efficiency representations of covered air conditioners are 

accurate, at least for participating manufacmrers ART claims that over ninety percent of 

the manufacturers of covered con~rnercial air conditioners participate in this voluntary 

certification prosram. Furthermore, the manufacturers maintain that the program is 

effectively policing the marketplace, and this additional testing and certification 

requirerr~ei~ts are unnecessary. 

a For cominercial boilers, the program is operated by the I-Iydronics Institute (HI) for the 

Gas Appliance Manufacturers Association. This is also a voluntq program which 

conducts certification testing of boilers at the manufacturer's test facility. Equipment 

performance values are listed in a directory that is availabie to the public The HI 

certification program does not include periodic vexif?carion tesring, but does have 

provisions for unannounced inspections of partici pati ng manufacturer's production 

facilities to Iook for changes in certified model design or construction. The existence of 

this industry program increases the likelihood that energy eficiency representations of 

covered boilqs are accurate. at least for participating manufacturers. I3 dkms that over 

14 FILE Q:~\eellO\ee-43\43~)mon~\~strep\nimept.Wpd 

October 6,1998 (7:04PM) 

 EE-TP-98-101 COMMENT 08CC

• A workable uniform sampling method covering the v.ride variety of commercial equipment 

would be difficult, if not impossible to formulate. This is due to the large number of design 

variations and sman numbers of identical units for some equipment. 

• The State of California and several voluntruy industry associations already have effective 

efficiency certification programs in place that leave the sample design to the manufacturer. ~ 

• \Vith adequate independent verification and penalties for improper certification, 

prescribing the sampling scheme is unnecessary, since the manufacturers will have an 

incentive to design one that limits the risk of being caught out of compliance. 

\Vith these observations in mind, NIST investigated the certification programs of the State of 

California, the Air Conditioning and Refrigeration Institute, the Gas Appliance Manufacturers' 

Association, and the Hydronics Institute. All of these programs entail some fonn of independent 

verification or supervision of tests carried out by the manufacturer, and each contains penalties 

that appear adequate for the purposes of assuring that testing would occur, and that certified 

efficiencies would be reliable. On the other hand, some mru1Ufacturers do not participate in 

voluntary industry programs, and no program exists at present for commercial il1rnaces, so DOE 

would need its own certification testing and veriflcation arrangement, at least for equipment not 

otherwise covered. 

NIST therefore recommends that DOE require manufacturers to certify compliance based on 

testing under a prescribed sampling scheme or on testing perfonned under DOE approved 

voluntary independent certification programs. 

The operating procedures ofthree existing industry certification programs are summarized belmv: 

• For commercial air conditioners, the program is operated by the Air-Conditioning and 

RefngeratiorrInstitute (ARI). This is a voluntary program that allows participating 

manufacturers to certify the perfonnance of their equipment, and which conducts periodic 

veIification testing of performance claims. Equipment perforn1ance values are listed in a 

directory that is available to the public. The existence of this industry program increases 

the likelihood that energy efficiency representations of covered air conditioners are 

accurate, at least for participating manufacturers. ARI claims that over ninety percent of 

the manufacturers of covered commercial air conditioners participate in this voluntary 

certification program. Furthennore, the mar1Ufacturers maintain that the ARI program is 

effectively policing the marketplace, and thus additional testing and certification 

requirements are unnecessary. 

• For commercial boilers, the program is operated by the Hydronics Institute (HI) for the 

Gas Appliance Manufacturers Association. This is also a voluntary program which 

conducts certification testing of boilers at the manufacturer's test facility. Equipment 

performance values are listed in a directory that is available to the public. The HI 

certification program does not include periodic verification testing, but does have 

provisions for unannounced inspections of participating manufacturer's production 

facilities to look for changes in certified model design or construction. The existence of 

this industry program increases the likelihood that energy efficiency representations of 

covered boil~rs are accurate, at least for participating manufacturers. HJ daims that over 

14 FILE Q:\data\ee-40\ee-43\43corrnnon\nasserilnistreplnistreptwpd 

October 6,1998 (7:04PM) 
ninety percent of the cast iron and copper fin boiler manufacturers participate in their 

certification program. The manufacturers of large steel boilers do not participate in the ED 

certification program, but rather test according to tile American Boiler Manufacturers 

Association (ABM-4) procedures. Furthermore, the manufacturers maintain that the N7 

program is effectively policing the marketplace, and thus any additional testing and 

certification requirements we unnecessary. 

e For commercial water heaters, the program is operated by the Gas Appliance 

Manufacturers Associati on (G.4,MA) 'I'hi s is a voluntary program that a1 l ours 

participating manufacturers to certify the performance of their equipment, and which 

conducts periodic verification testing of perfornlance claims. Equipment perfomlance 

values are listed in a directory that is available to the public. The existence of this industry 

program increases the likelihood that energy efficiency representations of covered water 

heaters are accurate, at least for participating manufacturers. GAMA claims that about 

two thirds of the con~mercial water heater nlanufactrirers participate in the voluntary 

certification program. 

e There is currently no industry certification program for furnaces 

Due to the above co~siderations, KIST recommends that DOE minimize additional testing 

burdens on manufacturers of commercial HV.4C and water heating equipment, while maintaining 

a certification procedure which is both fair to all manufacturers, and which will provide a 

reasonable assurance that the established minimum perfomlance standards are being met. The 

proposed procedures are described in the followjng sections, and include a basic certification 

program, a provision for voluntary independent certitication program, and an enforcement testing 

plan. This proposal would not require any additional testing not already being conducted by 

manufacturers who are participating in an industry certification program, and wouId involve a 

similar level of testing by manufacturers not participating in that or another equivalent jndus~ 

certification program. 

4.1.2 Certification Procedures 

NIST recommends that DOE adopt a certificatior~ plan for commercial equipment which 

incorporates the determination of efficiency based on testing conducted by or for the 

manufacturer and reported to DOE: either directly or through a designated industry organization. 

The value for efficiency shall be that which the manufacturer determines to be tfte mean for all of 

the units of that basic model, using any valid statistical method, and shall be based on die results 

of testing in accordance with the applicable test procedure. The individual units tested shall be 

representative of the basic model, and a st~fficient number shall be tested to ensure that an 

accurate estimate of &he mean efficiency of the basic model can be detemjned The number of 

units to be tested, and the method for determining the mean efficiency are left to the discretion of 

the manufacturer, however dl test results and related analysis used in the determination ofthe 

mean must be maintained by the manufacturer as a permanent record. A possible format for 

certifying the etXcjency to an authorized trade association or to DOE is included in Appendix PI.. 

 EE-TP-98-101 COMMENT 08CC

ninety percent of the cast iron and copper fin boiler manufacturers participate in their 

certification program. The manufacturers of large steel boilers do not participate in the .m 

certification program, but rather test according to the American Boiler Manufacturers 

Association (ABMA) procedures. Furthermore, the manufacturers maintain that the HI 

program is effectively policing the marketplace, and thus any additional testing and 

certification requirements are unnecessary. 

• For commercial water heaters, the program is operated by the Gas Appliance 

Manufacturers Association (GAMA). This is a voluntary program that allows 

participating manufacturers to certify the performance of their equipment, and ,vhich 

conducts periodic verification testing of perfom1ance claims. Equipment perforn1ance 

values are listed in a directory that is available to the public. The existence of this industry 

progTam increases the likelihood that energy efticiency representations of covered water 

heaters are accurate, at least for participating manufacturers. GAMA claims that about 

two thirds of the commercial water heater manufacturers participate in the voluntary 

certifi cation program. 

• There is currently no industry certification program for furnaces. 

Due to the above cOQsiderations, NIST recommends that DOE minimize additional testing 

burdens on manufacturers of commercial HVAC and water heating equipment, while maintaining 

a certification procedure which is both fair to all manufacturers, and which will provide a 

reasonable assurance that the established minimum perforn1ance standards are being met. The 

proposed procedures are described in the following sections, and include a basic certification 

program, a provision for voluntafj' independent certitication program, and an enforcement testing 

plan. This proposal would not require any additional testing not already being conducted by 

manufacturers who are participating in an industry certification program, and would involve a 

similar level of testing by manufacturers not participating in that or another equivalent industry 

certification program. 

4.1.2 Certification Procedures 

NIST recommends that DOE adopt a certification plan for commercial equipment which 

incorporates the detennination of efficiency based on testing conducted by or for the 

manufacturer and reported to DOE, either directly or through a designated industry organization. 

The value for efiiciency shall be that which the manufacturer determines to be the mean for all of 

the units of that ba..c;ic model, using any valid statistical method, and shall be based on the results 

of testing in accordance with the applicable test procedure. The individual units tested shall be 

representative ofthe basic model, and a sufficient number shall be tested to ensure that an 

accurate e~timate of the mean efficiency of the basic model can be determined. The number of 

units to be tested, and the method for determining the mean efficiency are left to the discretion of 

the manufacturer, however all test results and related analysis used in the detennination of the 

mean must be maintained by the manufacturer as a permanent record. A possible forn1at for 

certifying the efficiency to an authorized tTade association or to DOE is included in Appendix A. 

15 FILE Q:'data\ee-40\ee-43\43<:ommonlnasseri'nistrep'nistrept.wpd 

. October 6,1998 (7:04PM) 
4.1.3 Alternative Methods for Determining Efficiency 

NST recommends allowing the determination of efficiency based on testing results while not 

specif'icalfy requiring actual testing of every basic model. due to the potentidly large number of 

basic model variations and the subsequent large testing burden 'Thus, the eilkiency cf a basic 

model could be determined using analytical procedures such as computer simulation or other 

approaches, as long as those procedures have been verified and validated using testing results. 

\Vri tten docurnenta ti on demonstra~ing the validation of suck a~lalytical procedures must be 

maintained as a permanent record, and must be approved by a registered professional engineer, 

independent of the company. 

a 

4.1 ..I Voluntary Mependent Certificatioal T'rogram 

Manufacmrers who participate in industry rating and certification programs have their equipment 

subjected to periodic verification testing, which is conducted at independent laboratories, or by 

independent testing personnel. This provides a strong deterrent to f'alse performance claims. 

However, manufacturers who do not choose to participate in an industry rating program are not 

subject to verification testing. Thus, NIST recommends that manttfacturers participating in 

inctustry certification progams which meet the following requirements would be able to 

demonstrate coxrtpijance through their participation in the industry certification program. 

Ma~nufacturers not participating in voluntary induswy certification programs would have to have 

their covered products tested at an independent laboratory, or meet stricter compliance 

certificati~n criteria. 

Requirements for Approved Voluntaw Independent Certification Programs 

(1) Energy efficiency peifcrmance metrics must be based OII measurements. 

(2) Testing must be co~~ctucted at an independent laboratoiy, or under the supervision of 

independent personnel, in accordance with the prescribed DOE test procedures. 

(3) Periodic verification testing must be conducted on listed equipment, such that the performance 

of each basic moefel is checked at least every five years 

(3) Equipment which fkls verification testing must either be removed from production and sale, 

or be delisted. 

(5) Units selected for verification testing must be selected randomly from manufacturer's stock 

(6) The procedures for the operation of lhe certification program must be published in written 

form. 

Voluntary Independent Certification Programs which meet the above requirements can request 

DOE approval by submitting documentation substantiating their compliance directly to DOE. 

For man~~facturers of covered commercial WAC and water keating products who do not 

participate in a DOE approved Voluntary Independent Certification Program, the performance of 

covered products must be determined by measurements conducted at an independer~t laboratory, 

or under the supervision of independent persoiii~el, or the representations must be reviewed and 

certified by an independent state-registered professional engineer who is not an employee of the 

manufacturer. The registered professional engineer is to certify that the representation accurately 

16 FILE Q:Lkta\ee-4O\ee-43\43commonon~~strep\nistrept.wpd 

October 6,1998 (?WPM) 

 EE-TP-98-101 COMMENT 08CC

4.1.3 Alternative :Methods for Determining Efficiency 

"NiST recommends allo\\1ng the determination of efficiency based on testing results while not 

specifically requiring actual testing of every basic model, due to the potentially large number of 

basic model variations and the subsequent large testing burden. Thus, the eftlciency of a basic 

model could be detennined using analytical procedures such as computer simulation or other 

approaches, as long as those procedures have been verified and validated using testing results. 

Written documentation demonstrating the validation of such analytical procedures must be 

maintained as a permanent record, and must be approved by a registered professional engineer, 

independent of the company. 

4.1.4 Voluntary Independent Certification I)rogram 

Manufacturers who participate in industry rating and certification programs have their equipment 

subjected to periodic verification testing, which is conducted at independent laboratories, or by 

independent testing personnel. This provides a strong deten'ent to false perfonnance claims. 

However, manufacturers who do not choose to participate in an industry rating program are not 

subject to verification testing. Thus, NIST recommends that manufacturers participating in 

industry certification programs which meet the following requirements would be able to 

demonstrate compliance through their participation in the industry certification program. 

Manufacturers not participating in voluntary industry certification programs would have to have 

their covered products tested at an independent laboratory, or meet stricter compliance 

certification criteria. 

Requirements for Approved Voluntary Independent Certification Programs 

(1) Energy efficiency pelformance metrics must be based on measurements. 

(2) Testing must be conducted at an independent laboratOlY, or under the supervision of 

independent personnel, in accordance \\1th the prescribed DOE test procedures. 

(3) Periodic verification testing must be conducted on listed equipment, such that the performance 

of each basic mdtlel is checked at least every five years. 

(4) Equipment which fails verification testing must either be removed from production and sale, 

or be delisted. 

(5) Units selected for verification testing must be selected randomly from manufacturer's stock. 

(6) The procedures for the operation of the certification program must be published in written 

form. 

Voluntary Independent Certification Programs which meet the above requirements can request 

DOE approval by submitting documentation substantiating their compliance directly to DOE. 

For manufacturers of covered commercial HVAC and water heating products who do not 

participate in a DOE approved Voluntary Independent Certification Progranl, the performance of 

covered products must be determined by measurements conducted at an independent laboratory , 

or under the supervision of independent personnel, or the representations must be reviewed and 

certified by an independent state-registered professional engineer who is not an employee of the 

manufacturer. The registered professional engineer is to certify that the representation accurately 

16 FILE Q:\data\ee-40Iee-43\43common\nasseri\nistreplnistrept.wpd 

October 6, 1998 (7:04PM) 
reflects the energy efficiency of the covered product. The following sampling procedure must be 

followed: 

A sample of suft"Icient size shall be tested to ensure that 0 

any represented value of energy ef'ficiency shall be no greater than the lower of (A) the 

mean of the sample, or @) the lower 95 percent confidence limit ofthe true mean 

divided by 0.95, or, 

ar1j7 represented vatue of energy usage shall be no less than the greater of (A) the mean 

of the sample, or (B) the upper 95 percent confidence limit of the tnie mean divided by 

1.05. 

4.1.5 Enforcement Procedures 

R2ST recommends keeping essential1 y the same enforcement regulations for commercial FNAAC 

& water heating equipment as cw'lies~tly in place for the covered residential appliances. The only 

exceptions would be special provisio~~s fdr covered equipment which are manufactured in very 

small quantities, or which are verJI large in size. Curreilt enforcement reguiations require the 

testing of a minimum of four units, u7ith the potential for the testing of up to twenty units. This 

would be impossible for basic models malulactured in snxall quantities, and prohibitively 

expensive for extremely Large basic models. 'I'lius, N LS'T recommei~ds that if the total number of 

available units of a basic model involved in an enforcement action is less than four, then all ofthe 

rtnits shall be tested. *An exception could be made available for veq7 large units on a case-by-case 

basis, siich that on1 y a single unit would be tested. 

4.1.6 Proposed Sampling Scheme for Enforcement Testing 

KIST recommeilds a sampling scheme for the enforcement testing of conlmercial equipment, as 

outlined in Appendix B . 

FILE Q:Llata\ee-40iee-43\43comm0n~seri\nistrep\nistrepl.wpd 

October 6,1998 (7:04PM) 

 EE-TP-98-101 COMMENT 08CC

reflects the energy efficiency of the covered product. The fol1oV\~ng sampling procedure mllst be 

followed: 

A sample of sufticient siz.e shall be tested to ensure that ~ 

• any represented value of energy efliciency shall be no greater than the lower of (A) the 

mean oftbe sample, or (B) the lower 95 percent confidence limit of the true mean 

divided by 0.95, Of, 

• any represented value of energy usage shall be no less than the greater of (A) the mean 

of the sample, or (B) the upper 95 percent confidence limit of the tme mean divided by 

1.05. 

4.1.5 Enforcement Procedures 

:N1:ST recommends keeping essentially the same enforcement regulations for commercial HVAC 

& water heating equipment as cUlTentiy in place for the covered residential appl1ances. The only 

exceptions would be special provisions for covered equipment which are manufactmed in very 

small quantities, or which are very large in siz.e. Current enforcement regulations require the 

testing of a minimum of four units, with the potential for the testing of up to twenty units. This 

would be impossible for basic models manufactured in sman quantities, and prohibitively 

expensive for extremely iarge basic models. Thus, NIST recommends that if the total number of 

available units of a basic model involved in an enforcement action is less than four, then all of the 

units shall be tested. ~An exception could be made' available for very large units on a case-by -case 

basis, such that only a singJe unit would be tested. 

4.1.6 Proposed Sampling Scheme for Enforcement Testing 

J\i1:ST recommends a sampling scheme for the enforcement testing of commercial equipment, as 

outlined in Appendix B. 

17 FILE Q:ldata\ee-40\ee-43\43comrnon\nasseri\nistrep\nistrept.wpd 

October 6,1998 (7:04PM) 
4.2 Test Protocols for Commercial Water Heaters and Qn~fired Hot Water Storage 

Tanks 

4.2.1 General Discussions 

This subsection discusses the main issues identified for test procedures for con~mercid water 

heaters and con~mercial unfired hot ~~ater storage tanks 

4.2.2 Commercial Water Heater Test Procedure 

&?ST'S proposed amendments to the water heater test procedrlre include incorporation by 

reference portions of ANSI 221 3 O 3- 1993 that pertain to the measureme11 k of thenna't efficiency 

and standby loss. NTST also proposes modifications of the procedure to maintain consistency with 

the test procedure upon which federal energy consenration standards are based and to provide 

specifications for the measurement equipment to be used to perform the tests. 

EPAct indicates that 'yest procedures shall be those generally accepted inrtustry testing 

procedures or rating procedures developed or recognized by the Air-conditioning and 

Refrigeration Institute or by the American Society of Heating, Refrigerating and Air Conditioning 

Engineers, as referenced in ASKRAEIES Standard 90.1 and in effect on June 30, 

1992."ASHRAE/IES Standard 90.1-1989 with Addendum b was in effect on this date and the 

referenced test procedure for commercial water heaters was ANSI 221.10.3-1 990 Since then 

Addendum 90. In- f 997, which is related to commercial water heating equipment, was approved 

by AS-. Addendum 11 references ,kXSI 221.10.3-1993. Portions of ANSI 221.10.3-1993 

related to thermal efficiency and standby loss testing, as referenced within the test procedure 

being set forth in Appendix F, were unchanged from I990 to 1993. 

There are two other c~lrrently published test procedrlres that have been considered for 

irlcorporation by reference, ANSI 22 1.10.3-1 998 and AS£-RAE 1 18.1-1993. AXSB 221.10.3- 

I998 was published ii~ April 1998. This version contains changes in the R/lethod ofl'est sections 

of both the thermal efficiency and standby loss test procedures. These changes include differences 

in test setup procedures as well as reducing the test duration of the standby loss test from 48 to 

24 hours The .4ST3RAE test procedure also contains differences in test setup requjren~er~ts frorn 

those of AWSI 221.10.3-1990193 as well as the shortened 24 hour star~dt>y loss test duration. 

Although these test procedures are fundamentally similar to procedures contained in ANSI 

221.10.3-1993: they are not being incorporated by reference at this time because there is not 

sufficient evidence to indicate whether these changes will afTect energy conservation standards fbr 

covered equipment 

It is recommended that ANSL 221.10.3-1 993 be adopted as the test procedure for water heaters. 

KIST believes that incorporation of ANSI 221.10.3-1993 would not alter the energ standards 

for water heaters crlnently in place. Comments are requested on the impact of selecting this test 

procedure for incorporation by reference. Strong consideration was given by NIST to 

recommending the incorporation of ASHRAE Standard 118.1-1993. However, after carehlly 

reviewing the document, it was determined that modifications would have to be provided to bring 

certain portions of the test procedure in line with the test procedures contained in ANSI 

22 1 .10.3- 1 993 so as not to aff'ect energy standards. Cor~sideration was also given to the fact that 

18 FILE Q.'data\ee-40\ee-43\4~mhd'mishep~strept.wpd 

October 6,1998 (7:04PM) 

 EE-TP-98-101 COMMENT 08CC

4.2 Test Protocols for Commercial Water Heaters and Unfired Hot 'Vater Storage 

Tanks 

4.2.1 General Discussions 

This subsection discllsses the main issues identified for test procedures for commercial water 

heaters and commercial unfired hot water storage tanks. 

4,2.2 Comme.'cial Water Heater Test Procedure 

NiST's proposed amendments to the water heater test procedure include incorporation by 

reference portions of ANSI 221.10.3-1993 that pertain to the measurement of thennal efficiency 

and standby loss. N1ST also proposes modifications oftbe procedure to maintain consistency with 

the test procedure upon which federal energy conservation standards are based and to provide 

specifications for the measurement equipment to be used to perform the tests. 

EPAct indicates that "test procedures shall be those generally accepted industry testing 

procedures or rating procedures developed or recognized by the Air-conditioning and 

Refrigeration Institu~ or by the American Society of Heating, Refrigerating and Air Conditioning 

Engineers, as referenced in ASHRAElIES Standard 90.1 and in effect on June 30, 

1992." ASHRAEIIES Standard 90.1-1989 with Addendum b was in effect on this date and the 

referenced test procedure for commercial water heaters was ANSI 221.10.3-1990. Since then 

Addendum 90.1 n-1997, which is related to commercial water heating equipment, was approved 

by ASHRAE. Addendum n references .A...t'l"SI 221.10.3-1993. Portions of ANSI 221.10.3-1993 

related to thermal efficiency and standby loss testing, as referenced within the test procedure 

being set forth in Appendix F, were unchanged from 1990 to 1993. 

There are two other currently published test procedures that have been considered for 

incorporation by reference, ANSI 221.10.3-1998 and ASHRAE 118.l-1993. ANSI 221.10.3-

1998 was published in April 1998. This version contains changes in the Method of Test sections 

of both the tllermal efficiency and standby loss test procedures. These changes include differences 

in test setup procedures as well as reducing the test duration of the standby loss test from 48 to 

24 hours. The ASHRAE test procedure also contains differences in test setup requirements from 

those of ANSI Z21.1 0.3-1990/93 as well as the shortened 24 hour standby loss test duration. 

Although these test procedures are fundamentally similar to procedures contained in ANSI 

Z21.lO.3-1993, they are not being incorporated by reference at this time because there is not 

sutlicient evidence to indicate whether these changes will affect energy conservation standards for 

covered equipment. . ~ 

It is recomm ended that AN S [ 221. 1 0.3 -1993 be adopted as the test pi-ocedure for water heaters. 

]\(lST believes that incorporation of ANSI 221.10.3-1993 would not alter the enerblJ' standards 

for water heaters currently in place. Comments are requested on the impact of selecting this test 

procedure for incorporation by reference. Strong consideration was given by NIST to 

recommending the incorporation of ASHRAE Standard 118. I -1993. However, after carefully 

revievving the document, it was determined that modifications would have to be provided to bring 

certain portions of the test procedure in line with the test procedures contained in Al~SI 

221.10.3-1993 so as not to affect energy standards. Consideration was also given to the fact that 

18 FILE Q:\datalee-40Iee-43143comrnon'masseri'mistrep'mistrept.wpd 

October 6,1998 (7:04PM) 
AS- 1 18.1-1993 is currently undergoing revisions as is ASI3R.M Standard 90.1-1989 

When the revised Standard 90.1 is approved, the Department is required to review the impact on 

energy standards of the revised/amended standard. Upon amendment of Standard 90.1-1989, the 

Department can reconsider incorporatioil of the test procedure referenced by the revised Standard 

90.1. 

Measurement Eauipment Sfrecifications 

Specifications for measurement equipment to be used to conduct thermal efikiency and standby 

loss tests are not included in ANSI 221.10 3-1993 These specifications should be included to 

maintain consistertcqarnong test faci lities The specificatj ons that will be provided within 

Appendix F to Subpart B of Title 10 CFK Pair. 431 will be as contained in the Instrumentation 

subsection of Appendix E to Subpart B of 10 CFR Part 430 for temperature, pressure. higher 

heating value, weight, con~bustion products, energy consumption and rate of energy consumption 

Oil-fueled Water Heaters 

ANSI 221.10.3-1993 does not address the testing of oil-fueled water heaters (since it is limited to 

natural gas). Therefore, provisions are added to allow ANSI 221.10.3-1993 to directly address 

the testing of oil-fueled water heaters. These modifjcations are the same as those provided as a 

footnote to Table 1 I. 1 of A SHKAE Staldard 90.1 - 1 989 Addendum n. 

Electric Water Heaters 

ANSI 22 1 .10.3-1993 does not directly address the testing of electrjc water heaters. Therefore, 

provisions are added to allow the ANSI test procedure to directly address the testing of electric 

water heaters. These modifications are the same as those provided as a footnote to Table 1 1.1 of 

ASllRAE Standard 90 1-1989 Addendum n. 

Hot Water Supply Boilers 

Hot water supply boilers are designed and marketed to provide senrice water heating. Addendum 

n to ASHRAE Stanaard 90.1 - 1989 requires hot water supply boilers to meet the same energy 

efficiency requirements as water heaters. NTST recommends that the Department consider 

adoption of the ASHRLkE approach related to commercial hot water supply boilers, requiring hot 

water supply boilers to meet the energy efficiency standards for cominercial water heaters. 

Instantaneous Water Heater Definition 

The definition of commercial instantaneous water heaters contained ii~ EPAct ald the definition of 

consumer water heaters contained in NMCA do not specifically address devices that are 

designed to heat water to temperatures of 180°F or higher. -41 the Workshop on Commercial 

Appliances in April of 1998 GAMA stated that these devices are not designed or marketed to be 

used in consumer:'residential applications regardless of the input ratings of the devices and 

therefore should be subjected to the energy conservation standards of commercial equipment. 

This urould be consistent with the definitions of instantaneous water heaters presented in 

Appendix E to Subpart R of 10 CFR Part 430 which exclude water heaters designed to deliver 

water at a controlled temperature of 180" F or higher. Also, the Public Review Draft of AS HIUE 

19 FILE Q:&n\ee-40\ee-43\43comai~\nistrepinishept.~ 

October 6,1998 0:PM) 

 EE-TP-98-101 COMMENT 08CC

ASHRAE 118.1-1993 is currently undergoing revisions as is ASHRAE Standard 90.1-1989. 

When the revised Standard 90.1 is approved, the Department is required to review the impact on 

energy standards of the revisediamended standard. Upon amendment of Standard 90.1-1989, the 

Department can reconsider incorporation of the test procedure referenced by the revised Standard 

90.1. 

Measurement Equipment Specifications 

Specifications for measurement equipment to be used to conduct thermal etl1ciency and standby 

loss tests are not included in ANSI Z21.10.3-1993. These specifications should be included to 

maintain consistency~ among test facilities. The specifications that will be provided within 

Appendix F to Subpart B of Title 10 CFR Part 431 will be as contained in the Instrumentation 

subsection of Appendix E to Subpart B of 10 CFR Part 430 for temperature, pressure, higher 

heating value, weight, combustion products, energy consumption and rate of energy consumption. 

Oil-fueled Water Heaters 

ANSI Z21.lO.3-1993 does not address the testing of oil-fueled water heaters (since it is limited to 

natural gas). Therefore, provisions are added to allow ANSI Z21.1 0.3-1993 to directly address 

the testing of oil-fueled water heaters. These modifications are the same as those provided as a 

footnote to Table 11.1 of ASHRAE Standard 90.1-1989 Addendum n. 

Electric Water Heaters 

ANSI 221.10.3-1993 does not directly address the testing of electric water heaters. Therefore, 

provisions are added to allow the ANSI test procedure to directly address the testing of electl1c 

water heaters. These modifications are the same as those provided as a footnote to Table 11.1 of 

ASHRAE Standard 90.1-1989 Addendum n. 

Hot 'Vater Supply Boilers 

Hot water supply boilers are designed and marketed to provide service water heating. Addendum 

n to ASHRAE Stan4,ard 90.1-1989 requires hot water supply boilers to meet the same energy 

efficiency requirements as water heaters. NIST recommends that the Department consider 

adoption of the ASHRAE approach related to commercial hot water supply boiiers, requiring hot 

water supply boilers to meet the energy efficiency standards for commercial water heaters. 

Instantaneous Water Heater Definition 

The detlnition of commercial instantaneous water heaters contained in EPAct and the definition of 

consumer water heaters eontained in NAECA do not specifically address devices that are 

designed to heat water to temperatures of 180"F or higher. At the Workshop on Commercial 

Appliances in April of 1998 GAMA stated that these devices are not designed or marketed to be 

used in consumer/residential applications regardless of the input ratings of the devices and 

therefore should be subjected to the energy conservation standards of commercial equipment. 

This would be consistent with the definitions of instantaneous water heaters presented in 

Appendix E to Subpart B of 10 CFR Part 430 which exclude water heaters designed to deliver 

water at a controlled temperature of 180°.F or higher. Also, the Public Review Draft of ASHRAE 

19 FILE Q:'data\ee-40\ee.43\43connnonlnasseri'nislrep'nistrept.wpd 

October 6, 19!18 (7:04PM) 
Standard 90.1-1989R indicates that instantaneous water heaters designed to heat water to 

temperatures of 380°F or higher must meet coma~ercial product energy perfornlartce criteria 

regardless of input rating. 'The Departinent is considering whether instantaneous water heaters 

designed to heat water to temperatures of 180°F or higher shorild be subjected to the energy 

conservation standarcfs of commercial equipment regardless of input rating. The Depafiment is 

reviewing its statutory authority to determine whether products that are covered by the NAECA 

standards can be required to meet EPAct energy conser\iaPio~~ standards The rationaie is that 

product design and the intended use of such products may clearly indicate whetfier they are 

commercial or resiclentiaj products. 

Based on EPAct ciefinitions: the input rating for an EPAct-covered commercial water heater must 

lie above a minirnurn value, which corresponds to the upper limit for the NAEG.4-covered water 

heater input rating 'I'fiere are no size limits based on storage volume in either NAECA or EPitct 

However, the DOE test procedure for residential u7ater heaters (Appendix E to Subpart B of 10 

CFR Part 430) does not apply to instantaneous u7ater heaters with storage volilmes greater than 

or equal to 2 gallons. This causes a gap in test procedure coverage for instantaneous waler 

heaters which fail under NAECA coverage based on input rating but have storage s7olumes of 2 

gallons or more. At the Workshop on Conimercial Appliances in April of 1998, GL4kL4 and A. 0. 

Smith pointed out this gap in coverdge. They also stated that these equipment are not designed or 

marketed as consumer products. For the reasons given above, the Department is consideling 

whether instantanems water heaters having storage volumes of 2 gallolls or more should be 

srlbjected to the ener=qr consenration standards of commercial equipment regardless of inptrt 

rating. 9 

Exemption from Standby Loss Testing 

The exemption from standby loss testing may be claimed if the water heater has a storage capacity 

greater than 140 gallons, the tank surface area is insulated to R-13.5 and the water heater does 

not have a standing pilot tight. In order to clarify the requirements for ctaiming the exemption, the 

definitions of I<-value and tank surface area are presented in the test procedure. i<-value is 

defined as it relates to standard methods for its determination, and tank surface area is defined in 

terns of what portions shall be insulated to meet the exemption criterion. The Department is 

considering approaches that would strengthen building code inspection and verjtication of 

compliance with these provisions. 

4.2.3 Commercial Unfired Storage Tank Test Procedure 

Measurement of Heat Loss 

EPrlct sets forth requirements for a maximum heat toss rate of 6.5 Btu/h per square foot of rank 

surface area for certajn unfired storage tanks. EPAct indicates that "test procedures shall be those 

generally accepted industry testing procedures or rating procedures developed or recogi~ized by 

the Air-conditioning and Refrigeration Institute or by the An~erica~i Society of Heating, 

Refrigerating and *4ir Conditioning Engineers, as referenced in ASHRAEES Standard 90.1 and 

in effect on June 30.~1992." However. there is currently no test procedure referenced in ASEWE 

Standard 90.1-1989, including addenda, for this category of equipment. Therefore. NIS'I' has 

FILE Q:\data\ee-4O\ee-43\43commm~Lu.strepMstrept.wpd 

October 6,1998 (7:04PM) 

 EE-TP-98-101 COMMENT 08CC

Standard 90.1-1989R indicates that instantaneous water heaters designed to heat water to 

temperatures of 180c

F or higher must meet commercial product energy perfoIDlance criteria 

regardless of input rating. The Department is considering whether instantaneous water heaters 

designed to heat wafer to temperatures of 180°F or higher should be subjected to the energy 

conservation standards of commercial equipment regardless of input rating. The Department is 

reviewing its statutory authority to determine "\vhether products that are covered by the NAECA 

standards can be required to meet EP Act energy conservation standards. The rationale is that 

product design and the intended use of such products may clearly indicate whether they are 

commercial or residential products. 

Based on EPAct definitions, the input rating for an EPAct-covered commercial ,vater heater must 

lie above a minimum value, which corresponds to the upper limit for the NAECA-covered water 

heater input rating. There are no size limits based on storage volume in either N AECA or EP Act. 

However, the DOE test procedure for residential water heaters (Appendix E to Subpart B of 10 

CFR Part 430) does not apply to instantaneous water heaters with storage volumes greater than 

or equal to 2 gallons. This causes a gap in test procedure coverage for instantaneous water 

heaters which fall under NAECA coverage based on input rating but have storage volumes of 2 

gallons or more. At the \Vorkshop on Commercial Appliances in April of 1998, GAJ\..fA. and A. O. 

Smith pointed out this gap in coverage. They also stated that these equipment are not designed or 

marketed as consumer products. For the reasons given above, the Department is consideIing 

whether instantaneous water heaters having storage volumes of2 gallons or more should be 

subjected to the energy conservation standards of commercial equipment regardless of input 

rating. .. 

Exemption from Standbv Loss Testing 

The exemption from standby loss testing may be claimed if the water heater has a storage capacity 

greater than 140 gallons, the tank surface area is insulated to R-12.5 and the water heater does 

not have a standing pilot light. In order to clarify the requirements for claiming the exemption, the 

definitions of.R-value and tank surface area are presented in the test procedure. H.-value is 

defined as it relates to standard methods for its detem1ination, and tank surface area is defined in 

terms of what portions shall be insulated to meet the exemption criterion. The Department is 

considering approaches that would strengthen building code inspection and veritication of 

compliance with these provisions. 

4.2.3 Commercial Unfired Storage Tank Test Procedure 

Measurement of Heat Loss 

EPAct sets forth requirements for a maximum heat loss rate of 6.5 BtuIh per square foot of tank 

surface area for certain uniired storage tanks. EP Act indicates that "test procedures shall be those 

generally accepted industry testing procedures or rating procedures developed or recognized by 

the Air-conditioning and Refrigeration Institute or by the American Society of Heating, 

Refrigerating and Ail Conditioning Engineers, as referenced in ASHRAEIIES Standard 90.1 and 

in effect on June 30, 1992." However, there is currently no test procedure referenced in .AS~TRAE 

Standard 90.1-1989, including addenda, for this categOlY of equipment. Therefore, N1ST has 

20 FILE Q:\data\ee-40\ee-43\43commonlnasseri'cistreplnistrept.wpd 

October 6, 1998 (7:04PM) 
developed a procedt~re for testing unfired hot water storage tanks. This test procedure consists of 

two methods for determining the rate of heat loss per square foot of tank surface area The first 

method involves perfomling the standby loss test procedure on an electric storage water heater 

utilizing an identical tank wid1 identical illsulation and jacketing as that of the ullfired storage tank 

model and performing the necessary calculations to determine heat loss per syuartre foot of tank 

surface area. This procedure will enable the delemination of heat loss of an unfired storage tank 

as well as the standby loss of an electric storage water heater utilizing the same talk and 

insulation (having a thermal resistance no greater than that used oil the uilfired device) The 

second method is generally applicable to unfired hot water storage tanks It utilizes a separate 

water heater connected to the unfired siorage tank to charge the storage tank before and after a 

standby loss test period. 'The first method of testing is preferred aiad is meant to be less 

burdensome oil manufacturers by utilizing the test data of a storage water heater to determine the 

heat loss of the unfired storage tank and the standby loss of the storage water heater if the storage 

water heater is constructed the same way as the untjred storage tank. 

Exem~tion from I-Ieat T.,oss Testinrl, 

The exemption from heat loss testing may be claimed if an unfired hot water storage tank has a 

storage capacity greater than I40 gallons and the tank surface ares is insulated to R-12.5. In order 

to clarify the requirements for claiming the exemption, the definitions of R-value and tank surface 

area are presented in the test procedure. R-value is defined as it relates to standard methods for its 

determination, and tank surface area is defined in terms of 1vhrat portions shall be insulated to meet 

the exemption criterion. The Department j s considering approaches that ~7ould strengthen 

building code inspection and ve~ification of compliance with these provisions. 

4.2.4 Proposed Test Procedures for Commerciai Water Heaters 

KIST recommends s test procedure for rneasurenter~t of the energy consumption and energy 

efficiency of commercial water heaters, as outlined in Appendix C. The recornmended test 

procedure for unfired hot water storage tanks is [isted in Appendix D. 

FILE Q:\data\ee-40\ee-43\43comon~\nistI~~strept.wpd 

Octobs 6,1998 (704PM) 

 EE-TP-98-101 COMMENT 08CC

developed a procedure for testing unfired hot water storage tanks. This test procedure consists of 

two methods for determining the rate of heat loss per square foot of tank surface area. The first 

method involves perfoffi1ing the standby loss test procedure on an electric storage water heater 

utilizing an identical tank \\;],th identical insulation and jacketing as that of the unfired storage tank 

model and performing the necessary calculations to determine heat loss per square foot of tank 

surface area. This procedure v,111 enable the deteffi1ination of heat Joss of an unfired storage tank 

as well as the standby Joss of an electric storage water heater utilizing the same tank and 

insulation (having a thermal resistance no greater than that used on the unfired device). The 

second method is generally applicable to unfired hot water storage tanks. It utilizes a separate 

water heater connected to the unfired storage tank to charge the storage tank before and after a 

standby loss test period. The first method of testing is preferred and is meant to be less 

burdensome on manufacturers by utilizing the test data of a storage ,vater heater to determine the 

heat loss of the unfired storage tank and the standby loss of the storage water heater if the storage 

water heater is constructed the same way as the unfired storage tank. 

Exemption from Heat Loss Testing 

The exemption from heat loss testing may be claimed if an unfired hot water storage tank has a 

storage capacity greater than 140 gallons and the tank surface area is insulated to R-12.S. In order 

to clarity the requirements for claiming the exemption, the definitions of R-value and tank surface 

area are presented in the test procedure. R-value is defined as it relates to standard methods for its 

determination, and tank surface area is defined in terms of what portions shall be insulated to meet 

the exemption criterion. The Depattment is considering approaches that would strengthen 

building code inspection and vedfication of compliance with these provisions. 

4.2.4 Proposed Test Procedures for Commercial Water Heaters 

NIST recommends a test procedure for measurement of the energy consumption and energy 

efficiency of commercial water heaters, as outlined in Appendix C. The recommended test 

procedure for unfired hot water storage tanks is listed in Appendix D. 

21 FILE Q:ldatalee-40Iee-43143connnonlnasserilnistreplnistrept.wpd 

October 6, 1998 (7:04PM) 
4.3 Test Protocols for Commercial "Packaged7' Boilers 

4.3.1 General Discussions 

ASffRAE 90.1 Referenced Test Standards 

EPCA requires that the testing procedures for measuring the efficiency of commercial packaged 

boilers shall be those generally accepted industry testing procedures or rating procedures 

developed or recogxlized by the American Society ofv't--Ieating, Refrigerating and Air Conditioning: 

Engineers, as refereliced in ASHRAEIES Standard 90.1 aid in effect on June 30, 1992. If such 

an industry test procedure or rating procedure for commercial packaged boilers is amended; DOE 

shall adopt such revisions unless the Secretary determines that to do so would not produce test 

results which reflect energy efficiency, energy use, and estimated operating costs, and ~vould be 

burdensome to conduct. 

As referenced in ASI-ERAE 90.1 and in effect on June 30. 1992, there are five industry zest 

standards for gas and/or oil fired boilers. They are the t-h~erican National Standard hstitute ANSI 

221.13-1987 for gas fired boilers (,ANSI 221.13); the Hydronics Institute Testing and Rating 

Standard for Hedting Boilers-1989, sixth edition, for gas and oil fired boilers (abbreviated as HI 

Std.); the American Society of Mechanical Engineers Power Test Code 4.1-64 (reafimed 

R79/85/91) for Steam Generating Units for fossil fuel boilers (ASME P'I'C 4.1); the Ilnderwriters 

Laboratory Standard 795- 1973 for gas heating equipment OK 795); and Underwriters 

Laboratory Standard UL 726-1990 for oil fired boilers (UL 726) Of the five test standards. four 

are applicable to gas fired boilers and thee are applicable to oil fired boilers. 

Since the year 1989, three of the industry test standards have been revised. ANSI 22 1 13- 1987 

was first revised to '4NSII 221 13-1991, ai~d .4NS1221 13-1 991 was further revised via Addenda 

221 13a-1993 and 231 13b-1994. UL 795-1973 was revised to UL 795-1994, and LE 726-1990 

was revised to L. 726-1995 iZIscr, ASHRAE 90 1-1989 itself was revised via Addenda 90 lb, 

90 3 d, and 90 f e in b992, 90 t c, 90 Ig, and 90. li in 1993, and 90.lm-1995 and 90 111-3 997 

Currently, a revision to ASHIWE 90.1-1989, named ASHRAE 90 1-1989R, is going through the 

ASHELM? public review process 

Of the tllree industry test standards revised after June 30, 1992. there is no change in the energy 

performance test sections of UL 795 and 'CTL 726 from their prior versions. There are changes in 

the efficiency test section of W-SI 221.13 between the 221.13-1991 (and the early 1987 

versions) and the 22 1. I3 - 3 993a versiorls The major changes are (1) the title of the section 

(sec.2.11) for efficiency testing was changed from "Thermal Efficiency" to "EE ciency ", (2) the 

requirement for efficiency rating was changed from "not Less than that specified by the 

manuf.actt~rer" to "not less than 98% of that specified by the manufacturer", (3) the result 

efficiency rating (value) was changed from "rounded to the lower integer (dropping the fraction 

after the decimal point)" to "rounded to the nearest 0. I percent", (4) inlet water temperature for 

both steam boiler test and hot water boiler test was changed from "not specified" to "80 *1O9F", 

and (5) thermal efficiency test for steam boilers for outdoor installation was dropped in the 1993a 

version Of the five changes, i tern I eliminated the confusion j n efficiency terminology where the 

resulting combustion efficiency for indoor boilers was called thermal eEciency in the 1991 

22 FILE Q:Liata\ee-40\ee-43\43comm~Lus~ep\nirneptptwpd 

Octoba 6,1998 (7:WPM) 

 EE-TP-98-101 COMMENT 08CC

4.3 Test Protocols for Commercial "Packaged" Boilers 

4.3.1 General Discussions 

ASHRAE 90.1 Referenced Test Standards 

EPCA requires that the testing procedures for measuring the efficiency of commercial packaged 

boilers shall be those generally accepted industry testing procedures or rating procedures 

developed or recognized by the American Society of Heating, Refrigerating and Air Conditioning 

Engineers, as referel~ced in ASHRAEflES Standard 90.1 and in effect on June 30, 1992. If such 

an industry test procedure or rating procedure for commercial packaged boilers i"s amended, DOE 

shall adopt such revisions unless the Secretary detel1l1ines that to do so would not produce test 

results which reflect energy efficiency, energy use, and estimated operating costs, and vv'ould be 

burdensome to conduct. 

As referenced in ASHRAF 90.1 and in effect on June 30, 1992, there are five industry test 

standards for gas and/or oil fired boilers. They are the American National Standard Institute ANSI 

Z21.13-1987 for gas fired boilers (ANSI Z21.13); the Hydronics Institute Testing and Rating 

Standard for Heating Boilers-1989, sixth edition, for gas and oil tired boilers (abbreviated as HI 

Std.); the American Society of Mechanical Engineers Power Test Code 4.1-64 (reaftirmed 

R79/85/91) for Steam Generating Units for fossil fuel boilers (ASME PTC 4.1); the UnderwTiters 

Laboratory Standard 795-1973 for gas heating equipment CUL 795); and Underwriters 

Laboratory Standard UL 726-1990 for oil fired boilers (UL 726). Of the five test standards, four 

are applicable to gas fired boilers and three are applicable to oil fired boilers. 

Since the year 1989, three of the industry test standards have been revi sed. ANSI Z21.13- 1987 

was first revised to ANSI Z21.13-1991, and ANSI Z21.13-1991 was further revised via Addenda 

Z21.13a-1993 and Z21.13b-1994; UL 795-1973 was revised to UL 795-1994; and lJL 726-1990 

was revised to 1.JL 726-1995. Also, ASHRAE 90.1-1989 itself was revised via Addenda 90.1 b, 

90.ld, and 90.Ie in 4992, 90.1c, 90.1g, and 90.1i in 1993, and 90.1m-1995 and 90.1n-1997. 

Currently, a revision to ASHRAE 90.1-1989, named ASHRAE 90.1-1989R, is going through the 

ASHRAE public review process. 

Of the three industry test standards revised after June 30, 1992, there is no change in the energy 

performance test sections of UL 795 and lJL 726 from their prior versions. There are changes in 

the efficiency test section of ANSI Z2l.13 between the Z21.13-1991 (and the early 1987 

versions) and the Z21.13-1993a versions. The major changes are (1) the title of the section 

(sec.2.11) for efficiency testing was changed from "Thermal Efficiency" to "Efficiency", (2) the 

requirement for efficiency rating was changed from "not less than that specitled by the 

manufacturer" to "not less than 98% of that specified by the manufacturer", (3) the result 

efficiency rating (value) was changed from "rounded to the lower integer (dropping the fraction 

after the decimal point)" to "rounded to the nearest 0.1 percent", (4) inlet water temperature for 

both steam boiler test and hot water boilertest was changed from "not specified" to "80 ±10°F", 

and (5) thermal efficiency test for steam boilers for outdoor installation was dropped in the 1993a 

version. Of the five changes, item 1 eliminated the confusion in efficiency terminology where the 

resulting combustion efficiency for indoor boilers was called thermal efficiency in the 1991 

22 FILE Q:ldatalee-40Iee-43143common'nasserilnistreplnistrept.wpd 

October 6,1998 (7:04PM) 
version. Item 2 presumably was to provide a tolerance of 3% due to the variability of test results 

between of txvo independent tests fmanufacturer's and testing agency's). Item 3 was to give the 

test boiler a more accurate representation for the efficiency value (since the fractional value can 

get rounded down by as much as 0.9%). Item 4 was to provide a more repeatable test result by 

eliminating the ambiguity ofa un-specified test water inlet temperature. The reason for the change 

in item 5 is not clear. Of the five revisions, the specification of inlet water temperati.tre (itern 4) 

and the elimination of test for steam boilers for outdoor instaliation (item 5) are directly related to 

test procedure change. The inlet water temperature specification of 80 *lOGF would provide 

more repeatable test results and is in agreement with the requirement for "Combustion Test" 

specified in section 2.6.1 of both versions (1987 arld 1993a) of'tlle standard Since EPCA 

specifies combustion efjfici ency as the energy efflci ency descriptor for all cominercial packaged 

boilers, the test for tjlernlal efficiency for a steam boiler is not required by the statute at the 

present time. Based on the above discussion, NIST believes that the revisions contained in mSI 

221.13-1993a would not produce results that reflect on energy efficiency and would not be 

unduf y burdensome to conduct. 

Definition and Boiler Capacity 

EPAct defines a packaged boiler as "a boiler that is shipped complete with heating equipment. 

mechanical draft equipment, and automatic controls, usually shipped in one or more sections." 

EPAct, Sec. 122(a)11 I)@). Of the five test standards (procedures) for commercial heating boilers 

referenced by 90.1-1989 which in turn was referenced by EP.4ct; and in eRect on June 

30, 1 992, three provided similar definitions for packaged boilers, one irnplied that the boiler under 

its scope to be a packaged boiler by limiting the size of the boiler covered, and one provided no 

definition. Specifically, the Hydronics Institute's "Testing and rating Standard for Heating 

Boilers - 1989" (abbreviated as HI -1989) defines a packaged boiler as "a boiler-burner unit 

factory assembled and wired" 1-11 does not specifically Iirnit the test standard lo conlmercial 

packaged boilers. However, Hi limits the test star~dard to low-pressure heating boilers as defined 

in ASME Boiler and Pressure Vessel Code, Section IV, Heating Boilers. The Undenvnters 

Laboratory's UL 726 for "Oil-Fired Boiler Assemblies" defines an oil-fired boiler assembly as "A 

boiler assembly equipped with one or rnore oil burners, and all the necessary safety controls, 

electrical equipment as needed, and related equipment, manufactured for assembly as a unit" 'C!L 

795 for "Comn~erciaf-Industrial Gas Heating Equipment" includiilg gas-fired boilers defined a 

term "gas-fired device" as ".... each device shall be factory-built and shall include all essential 

comporlents necessary for its normal function as intended. and may be shipped as two or rnore 

major subassemblies" In addition, both UL 726 and lil, 795 specie fixat "...each subassembly 

shall be capable of being incorporated into the final assembly without requiring alteration, cutting; 

drilling, threading; welding or similar tasks by the installer. ..." Both hTL 736 and T_'L 795 limit the 

scope of coverage to a boiler assenlbly ANSl Standard 22 1.1 3 does not define a term for 

commercial packaged boilers, however, the standard limits its scope of coverage to gas-fired lowpressure steam and hot water boilers with input ratings of less than 13,500,000 Btw'h that likely 

would limit its coverage to commercial packaged boilers as defined in EPAct The fifth referenced 

standard, the ASME Power Testing Code for Steam Generating Units, ASM'E PTC 4 1, provides 

no definition for a packaged boiler 

FILE Q:idataiee-40\ee-43\43commm\n~\nisUepLustrept.wpd 

October 6,1998 (7:04PM) 

 EE-TP-98-101 COMMENT 08CC

version. Item 2 presumably was to provide a tolerance of 2%) due to the variability of test results 

bet\.veen oft"\vo independent tests (manufacturer's and testing agency·s). Hem 3 was to give the 

test boiler a more accurate representation for the efficiency value (since the fractional value can 

get rounded down by as much as 0.9%). Item 4 was to provide a more repeatable test result by 

eliminating the ambiguity of a un-specified test water inlet temperature. The reason for the change 

in item 5 is not clear. Of the five revisions, the specification of inlet water temperature (item 4) 

and the elimination of test for steam boilers for outdoor installation (item 5) are directly related to 

test procedure change. The inlet water temperature specification of 80 ±10c

F would provide 

more repeatable test results and is in agreement with the requirement for "Combustion Test" 

specified in section 2.6.1 of botb versions (1987 and 1993a) of the standard. Since EPCA 

specifies combustion efficiency as the energy efficiency descriptor for ail commercial packaged 

boilers, the test for thermal efficiency for a steam boiler is not required by the statute at the 

present time. Based on the above discussion, NIST believes that the revisions contained in ANSI 

Z21.13-1993a would not produce results that reflect on energy efficiency and would not be 

unduly burdensome to conduct. 

Definition and Boiler Capacity 

EPAct defines a packaged boiler as "a boiler that is shipped complete with heating equipment, 

mechanical draft equipment, and automatic controls; usually shipped in one or more sections.!l 

EPAct, Sec.122(a)(11)(B). Of the five test standards (procedures) for commercial heating boilers 

referenced by ASH.&AE 90.1-1989 which in tum was referenced by EPAct, and in effect on June 

30, 1992, three provided similar definitions for packaged boilers, one implied that the boiler under 

its scope to be a packaged boiler by limiting the size of the boiler covered, and one provided no 

definition. Specifically, the Hydronics Institute's "Testing and rating Standard for Heating 

Boilers - 1989" (abbreviated as HI -1989) defines a packaged boiler as "a boiler-burner unit 

factory assembled and wired". HI does not specifically limit the test standard to commercial 

packaged boilers. However, HI limits the test standard to low-pressure heating boilers as defined 

in AS1-1E Boiler and Pressure Vessel Code, Section IV, Heating Boilers. The Unden,vTIters 

Laboratory's UL 726 for "Oil-Fired Boiler Assemblies" defines an oil-fired boiler assembly as "A 

boiler assembly equipped with one or more oil burners, and all the necessary safety controls, 

electrical equipment as needed, and related equipment, manufactured for assembly as a unit". UL 

795 for "Commercial-Industrial Gas Heating Equipment" including gas-fired boilers defined a 

term "gas-fired device" as " .... each device shall be factory-built and shall include all essential 

components necessary for its normal function as intended, and may be shipped as two or more 

major subassemblies". In addition, both UL 726 and lJL 795 specify that" ... each subassembly 

shall be capable of being incorporated into the final assembly without requiring alteration, cutting, 

drilling, threading, welding or similar tasks by the installer .... " Both UL 726 and tTL 795 limit the 

scope of coverage to a boil er assembly. ANSI Standard Z21.13 does not define a term for 

commercia! packaged boilers, however, the standard limits its scope of coverage to gas-fired lowpressure steam and hot water boilers with input ratings of less than 12,500,000 Btulh that likely 

would limit its coverage to commercial packaged boilers as defined in EP Act. The fifth referenced 

standard, the ASME Power Testing Code for Steam Generating Units, ASM:E PTC 4.1, provides 

no definition for a packaged boiler. 

23 FILE Q:ldata\ee-40Iee-43143common'nasseri'nistrep'nistrept.wpd 

October 6, 1998 (7:04PM) 
Dt3ring the April 1998 DOE workshop, the meaning of a packaged boiler with respect to capacity 

(size), method of shipment and assembly, types (low-pressure steam and hot water heating 

boilers, high temperature hot water boilers, and high-pressure steam power boilers) and 

application (space heating, service water heating, industrial and utility applications) were 

discussed. The Gas Appliances hfanufacturers Association (GAhfA), the Anmican Boilers 

Manufacturers Association (ABMA) and Courlcit of Industrial Boiler Owners (GIBO) commented 

that even though there was no clear-cut criteria on what constitutes a packaged boiler, i1.a general 

a boiler will not be classified as a packaged boiler if field (at the site) welding, pressure parts, or 

fabricating the assembly at the site are required. The criterion of using the size or rated input 

anci:'or output capacity as a possjb'fe factor in he defirljtion for comalercial packaged boilers was 

discussed and suggested by some attendees as helphl in defining the scope of coverage in a DOE 

test procedure for commercial packaged boilers As described in the previous paragraph, ANSI 

221.23 limits its coverage of boilers to low-pressure steam and hot water boilers of less than 

12,500,000 Btuk in~ut A survey of the commercial boilers in the 1998 certified rating directory 

of the Hydronics institute showed the largest capacity (output) boiler to be a gas fired heating 

boiler uith approximately 14,000,000 Btu/h gross output Therefore, there is reason to believe 

that there is a current practice of producing, in quantities, packaged low-pressrjre steam md hot 

water heating boilers with output capacity of up to approxjmately 14 million Btu per hour. 

ffou7ever, the California Enesgy Commission (CEC) pointed out that the statute does not provide 

an upper linlit on capacity in its definition for comn~ercial packaged boilers. Tl~erefore CEC stated 

that one cannot specify an upper limit on capacity in a DOE test procedrtre for commercial 

packaged boilers. KIST agrees with CEC's comment that the statute does not specifically provide 

an upper limit to the capacity of a packaged boiler. 'Therefore, the setting of an upper limit on the 

capacity of a packaged boiler is not recommended in the proposed test procedure 

h2ST realizes that even though there are packaged lieating boilers, especially of the steel fire tube 

or water tube design, that have capacities greater than those covered by the ANSI 221.13 

standard of 12,500,000 R tui'h, the limited quantities produced and the method of marketing those 

boilers (such as custom made to order with provision for acceptance test to verify efficiency 

guarantee) may n.~ake the testing to c,onform to a DOE test procedure impractical or un-necessary. 

Therefore, input and comments are sought from all stakeholders on the appropriateness and 

practicality (with respect to appijcarion and quantity produced) on the setting of an upper limit on 

capacity, and if appropriate, on the vaiue ofthe upper limit. 0 

KIST believes that the definition of a packaged boiler is dear enough to exclude custorn-design 

(for a specific installation), field-constructed (as opposed to a re-assembly of major 

sub-assemblies disassembled for shipping purpose) boiler system, and no additional clarification is 

needed to the definition of commercial packaged boilers as stated in the statute. 

In its comment, CEC recommended that an "editorial" change be made to the EPAct definition of 

packaged boiler by deleting the word "usually" in the definition CEC suggested that the word 

"usudiy" in the definition could imply that a packaged boiler can be shipped in less than one 

package. XST believes that nothing urould be gained by deleting the word "usrrdly" even if it 

appears redundant. And, if "usually" refers to the word "sections", instead of the number of them, 

some meaning might be lost by deleting it. Therefore, NIST is not adopting for recomnlendation 

FILE Q:Llata\ee-40\ee-43!43comm\nasSeri\nisk~~sireptptwpd 

October 6,1998 (7:04PM) 

 EE-TP-98-101 COMMENT 08CC

During the Apri11998 DOE workshop, the meaning of a packaged boiler with respect to capacity 

(size), method of shipment and assembly, types (low-pressure steam and hot "vater heating 

boilers, high temperature hot water boilers, and high-pressure steam power boilers) and 

application (space heating, service water heating, industrial and utility applications) were 

discussed. The Gas Appliances Manufacturers Association (GAMA), the American Boilers 

Manufacturers Association (ABMA) and Council of Industrial Boiler Owners (CIBO) commented 

that even though there was no clear-cut criteria on what constitutes a packaged boiler, in general 

a boiler will not be classified as a packaged boiler if field (at the site) welding, pressure parts, or 

fabricating the assembly at the site are required. The criterion of using the size or rated input 

and/or output capacity as a possible factor in the definition for commercial packaged boilers was 

discussed and suggested by some attendees as helpful in defining the scope of coverage in a DOE 

test procedure for commercial packaged boilers. As described in the previous paragraph, Al'l"SI 

Z21.13 limits its coverage of boilers to low-pressure steam and hot water boilers of less than 

12,500,000 Btulh in~ut. A survey of the commercial boilers in the 1998 certified rating directory 

of the Hydronics Institute showed the largest capacity (output) boiler to be a gas fired heating 

boiler Vl,1.th approximately 14,000,000 Btu/h gross output. Therefore, there is reason to believe 

that there-is a current practice of producing, in quantities, packaged low-pressure steam and hot 

water heating boilers v.lth output capacity of up to approximately 14 million Btu per hour. 

However, the California Energy Commission (CEC) pointed out that the statute does not provide 

an upper limit on capacity in its definition for commercial packaged boilers. Therefore CEC stated 

that one cannot specify an upper limit on capacity in a DOE test procedure for commercial 

packaged boilers. NrST agrees with CEC's comment that the statute does not specifically provide 

an upper limit to the capacity of a packaged boiler. Therefore, the setting of an upper limit on the 

capacity of a packaged boiler is not recommended in the proposed test procedure. 

NIST realizes that even though there are packaged heating boilers, especially of the steel fire tube 

or water tube design, that have capacities greater than those covered by the ANSI Z21.13 

standard of 12,500,000 Btuih, the limited quantities produced and the method of marketing those 

boilers (such as custom made to order with provision for acceptance test to verify efficiency 

guarantee) may make the testing to confonn to a DOE test procedure impractical or un-necessary. 

Therefore, input and comments are sought from all stakeholders on the appropriateness and 

practicality (with respect to application and quantity produced) on the setting of an upper limit on 

capacity, and if appropriate, on the value of the upper limit. , NIST believes that the definition of a packaged boiler is clear enough to exclude custom-design 

(for a specific installation), field-constructed (as opposed to a fe-assembly of major 

sub-assemblies disassembled for shipping purpose) boiler system, and no additional clarification is 

needed to the definition of commercial packaged boilers as stated in the statute. 

In its comment, CEC recommended that an "editorial" change be made to the EPAct definition of 

packaged boiler by deleting the word "usually" in the definition. CEC suggested that the word 

"usually" in the definition could imply that a packaged boiler can be shipped in less than one 

package. NIST believes that nothing would be gained by deleting the word "usually" even if it 

appears redundant. A.lld, if "usually" refers to the word "sections", instead of the number of them, 

some meaning might be lost by deleting it. Therefore, NIST is not adopting for recommendation 

24 FILE Q:'datalee-40Iee-43143corrnnonlnasserilnistreplnistrept.wpd 

October 6,1998 (7:04PM) 
CEC's suggestion of deleting the word "usually" in the definition for commercial packaged boilers 

Scope of Coverage 

fil Addendum 90.1 n to ASHRAE Standard 90.1-1989, a boiler is defined as "a self-contained 

appliance for supplying steam or hot water". AKSI Standard 23 1.13 defines a gas-fired boiler in 

the same way as ASETRAE Addendum 90.1 n. The I-Iydronjcs Institute's Testing and Rating 

Standard for Heating Boilers &I Standard - 1989) defines a boiler as "a closed direct fired 

pressure vessel intended for use in heating water or generating steam to be used externar to itself' 

30th UL Standards 726 and 795 define a boiler as "a closed vessel in which water or some other 

liquid is heated or steam is generated or superheared, under pressure or vacuum, by direct 

application of heattf ASME PTC 4.1 defines "a steam generating unit (including the boiler, 

furnace, superheater, reheater . . and fuel-burning equipment) as conlbinations of apparatus for 

liberating and recovering heat, together with apparatus for transferring to a working fluid the heat 

thus made available". In all these definj tions, there is no expfici t language on the type of 

applications, that is, space heating, industrial process heating, power generation, etc. that the test 

boiler is to be used, except that in their Scope sections, mSf 221.13 and HI Standard - 1989 

limit the class of boilers to lotv-pressure steam and hot water heating boilers. 

During the April 1998 workshop, questions were raised as to the scope of coverage in a DOE test 

procedure with respect to the end use of a packaged boiler since the statute does not explicitly 

specie the type of applications where the term "packaged boiler" is involved. It was pointed out 

by CBO, and others that the hot water and steam produced by a packaged boiler can be used for 

process heating in industrial and manufacturing processes where, in addition to etriciency, other 

(design) considerations may be involved in the operation of a boiler. ABMA and CIBO also 

pointed out that there are packaged high-pressure steam and high temperature hot water boilers 

that are different from the low-pressure steam and hot water heating boilers (as classified by 

ASME) usualfy usedDin space heating and senrice water heating applications. Other attendees 

(GAMA, Lennox International) pointed out that EPAct invokes ASFERAE 90.1 for the test 

procedures in the energy efficiency testing of coinmercial equiptalent, and that historically 

AS- 90.1 specified the equipnlent covered in the standard to space conditioning and service 

water heating applications only. Lennox also stated that it believed that the intent of EPAct when 

it was developed was to have the equipment test standards to come forth from AST-IWAE 90.1, 

and those applications other than space conditioning and service water heating were not within 

the scope of ASHRAE 90.1. The above argmrne~lts are relevant in view of the fact that the EPAct 

eficiency standard levels also appear in ASHRAE 90.1. 

A review of the scope of ASHRAE 90.1 and the five test standards referenced by AS^^ 90.1 

for testing boilers showed the following: 

ASEER4E 90.1: By its title, "Energy Efficiency Design of New Buildings except Low-Rise 

Residential Buildings", the standard indicates that it is concerned with n~inirnizing the energy 

consumptiort in the operation and maintenance of the building itself (that is, energy consumpti on 

with respect to the function of the building and the comfort of the occupants). In ASHRAE 

90.1-1989, there was no specific language excluding the coverage of certain types of equipment 

that are installed in the building. However, in a revision in July 3, 1997 to the standard with 

25 FILE Q:\data\ee-40\ee-43\43~0mmon\nasseri\nishep~ept.wpd 

October 6,1998 (7:04PMj 

 EE-TP-98-101 COMMENT 08CC

CEC's suggestion of deleting the word "usually" in the definition for commercial packaged boilers. 

Scope of Coverage 

In Addendum 90.1n to ASHRAE Standard 90.1-1989, a boiler is defined as "a self-contained 

appliance for supplying steam or hot water". ANSI Standard Z21.13 defines a gas-fired boiler in 

the same way as ASHRAE Addendum 90.1n. The Hydronics Institute's Testing and Rating 

Standard for Heating Boilers (HI Standard - 1989) defines a boiler as "a closed direct fired 

pressure vessel intended for use in heating "vater or generating steam to be used external to itself'. 

Both UL Standards 726 and 795 define a boiler as "a closed vessel in which water or some other 

liquid is heated or steam is generated or superheated, under pressure or vacuum, by direct 

application of heat". ASME PTe 4.1 defines "a steam generating unit (including the boiler, 

furnace, superheater, reheater ... and fuel-burning equipment) as combinations of apparatus for 

liberating and recovering heat, together with apparatus for transferring to a working fluid the heat 

thus made available". In alJ these definitions, there is no explicit language on the type of 

applications, that is, space heating, industrial process heating, power generation, etc. that the test 

boiler is to be used, except that in their Scope sections, ANSI Z21.13 and HI Standard - 1989 

limit the class of boilers to low-pressure steam and hot water heating boilers. 

During the April 1998 workshop, questions were raised as to the scope of coverage in a DOE test 

procedure with respect to the end use of a packaged boiler since the statute does not explicitly 

specify the type of applications where the tenn "packaged boiler" is involved. It was pointed out 

by crno, and others that the hot water and steam produced by a packaged boiler can be used for 

process heating in industrial and manufacturing processes where, in addition to efficiency, other 

(design) considerations may be involved in the operation of a boiler. ABMA and ClBO also 

pointed out that there are packaged high-pressure steam and high temperature hot water boilers 

that are different from the low-pressure steam and hot water heating boilers (as classified by 

ASME) usually used-in space heating and service water heating applications. Other attendees 

(GA.MA, Lennox International) pointed out that EP Act invokes ASHRAE 90.1 for the test 

procedures in the energy efficiency testing of commercial equipment, and that historically 

ASHRAE 90.1 specified the equipment covered in the standard to space conditioning and service 

water heating applications only. Lennox also stated that it believed that the intent of EPAct when 

it was developed was to have the equipment test standards to come forth from ASHRAE 90.1, 

and those applications other than space conditioning and service \vater heating were not within 

the scope of ASHRAE 90.1. The above ar!,ruments are relevant in view of the fact that the EPAct 

efficiency standard levels also appear in ASHRAE 90.1. 

A review of the scope of ASHRAE 90.1 and the five test standards referenced by ASHRA.E 90.1 

for testing boilers showed the following: 

ASHR4..E 90.1: By its title, "Energy Efficiency Design of New Buildings except Low-Rise 

Residential Buildings", the standard indicates that it is concerned with minimizing the energy 

consumption in the operation and maintenance of the building itself (that is, energy consumption 

with respect to the function of the building and the comfort of the occupants). In ASHRAE 

90.1-1989, there was no specific language excluding the coverage of certain types of equipment 

that are installed in the building. However, in a revision in July 3, 1997 to the standard \\1th 

25 FILE Q:\data\ee-40\ee-43\43conunon'nasserilnistreplnistrept.wpd 

October 6, 1998 (7:04PM) 
respect to the Title; Purpose, and Scope (TPS) of the standard by the AS= Standing 

Standard Project Cohmittee 90.1 (SSPC 90. I), the scope was revised to exclude from coverage 

"equipment and portions of building systems that use energy prin~arify to provide for industrial, 

manufacturing or commercial processes". 

HI Standard (1989) (for oil or gas-fired boilers): Limits its scope to boilers conforming to 

ASME Boilers and Pressure Vessels Code; Section W; Heating Boilers. Therefore, the test 

standard is limited to 15 psig maximum steam pressure for steam heating boilers and to 160 psig, 

250°F water for hot water boilers. 

ANSI/AGA 221.13 (for gas -fired boilers): Limits its scope to boilers with 15 psig maximum 

steam pressure for steam heating boilers and 160 psig, water pressure, 250°F water temperature 

for hot water heating boilers with a input rating of less than 12300,000 Btulk. 

UL 726 (for oil-fired boilers): No limit is placed on steam pressure or on hot water temperatitre. 

The test standard is limited ro boiler assemblies as defined in the srandard. 

ZrL' 795 (for gas-fired boilers): No limit is placed on steam pressure or on hot water temperature. 

The test standard is limited to boiler assemblies defined in the standard. 

ASMX PTC 4.1 (for Fossil-fueled steam boilers): No limit is placed on stearn pressure or 

capacity. The test standard is limited to steam boilers (steam generating units) but also applicable 

to high temperature pabove 250" F water temperature) hot water boilers. 

In reviewing the above industry standards that are referenced by EPAct (or referenced by EPAct 

via ASE-IRAE 90.1), it is believed that the intent of ASI-TRBE 90 1, I37 Standard -1989 and ANSI 

221.13 is to cover Low-pressure steam and hot water heating boilers designed for space 

conditioning and senrice water heating purposes. The intent of the two Uk standards is testing for 

safety certification (with respect to constnlction and operation) where the performance tests are 

specifkd to insure that the test boiler will perform to some minintum level oC its intended function 

'fhe intent of ASME PTC 4 1 is mainly for the acceptance test of large steam generating units 

where a detailed account of dl energy expenditures is desired. This is evident by the detailed heat 

gain and heat loss measurement and calculation proceditres specified in the test codes for all 

components of the boiler system. Tlotvever, the standard does provide for an abbreviated 

(simplified) efficiency test for the acceptance test of small heating and industrial steam generators. 

A review of the relevant sections of EPAct indicated that even though the statute does not restrict 

the coverage of commercial packaged boilers to space conditioning and service water heating, the 

amendment to Sec.340 of EPCA (42. U.S.C.63 11) as contained in EPAct did put commercial 

packaged boilers and warm air furnaces (which is for space heating use only) into a single item 

(EPAct, see. 122(a)(l)jlB)iE)), and inserted the item into the midst of the definitions for oxher 

added:amended items (from small commercial packaged air conditioning and heating equipment to 

storage water heaterg, ...., all of which are equipment exclusively, for space conditioning and 

service water heating purposes). EPAct, sec. 122(a)(l)(B) fn addition, in EPCA (EPCA. 

sec.340(2)@), 42 U.S.C.63 1 1 ). an item for "steam boilers (clause ix)" xias included as a separate 

item, and has been retained in EPAct as a redesignated clause viii. EPAct, sec. 123(a)(2)@). 

h2ST believes that the intent of the statute is to designate the tern1 "packaged boifer" as an ASSE 

26 FILE Q:~bkedO\ee-43\43comm~\nishep\nish'ept.wpd 

October 6,1998 (7:04PM) 

 EE-TP-98-101 COMMENT 08CC

respect to the Title, furpose, and Scope (TPS) of the standard by the ASHRAE Standing 

Standard Project Committee 90.1 (SSPC 90.1), the scope was revised to exclude from coverage 

"equipment and portions of building systems that use energy primarily to provide for industrial, 

manufacturing or commercial processes". 

HI Standard (1989) (for oil or gas-fired boilers): Limits its scope to boilers confoffi1ing to 

ASME Boilers and Pressure Vessels Code, Section IV, Heating Boilers. Therefore, the test 

standard is limited to 15 psig maximum steam pressure for steam heating boilers and to 160 psig, 

250°F water for hot water boilers. 

ANSIIAGA Z21.13 (for gas -fired boilers): Limits its scope to boilers "lith 15 psig maximum 

stean1 pressure for steam heating boilers and 160 psig, water pressure, 250°F water temperature 

for hot water heating boilers with a input rating ofless than 12,500,000 Btu/h. 

UL 726 (for oil-fired boilers): No limit is placed on steam pressure or on hot water temperature. 

The test standard is limited to boiler assemblies as defined in the standard. 

UL 795 (for gas-fired boilers): No limit is placed on steam pressure or on hot water temperature. 

The test standard is limited to boiler assemblies defined in the standard. 

ASME PTe 4.1 (for Fossil-fueled steam boilers): No limit is placed on steam pressure or 

capacity. The test standard is limited to steam boilers (steam generating units) but also applicable 

to high temperature ~above 250°F water temperature) hot water boilers. 

In revieV'.ring the above industry standards that are referenced by EP Act (or referenced by EPAct 

via ASHRAE 90.1), it is believed that the intent of ASHRAE 90.1, Ell Standard -1989 and ANSI 

Z21.13 is to cover low-pressure steam and hot water heating boilers designed for space 

conditioning and service water heating purposes. The intent of the two UL standards is testing for 

safety certification (with respect to constmction and operation) where the performance tests are 

specified to insure that the test boiler will perform to some minimum level of its intended function. 

The intent of ASME PTC 4.1 is mainly for the acceptance test oflarge steam generating units 

where a detailed account of all energy expenditures is desired. This is evident by the detailed heat 

gain and heat loss measurement and calculation procedures specified in the test codes for all 

components of the boiler system. However, the standard does provide for an abbreviated 

(simplified) efficiency test for the acceptance test of small heating and industrial steam generators. 

A review of the relevant sections of EPAct indicated that even though the statute does not restrict 

the coverage of commercial packaged boilers to space conditioning and service water heating, the 

amendment to Sec.340 ofEPCA (42 US.C.6311) as contained in EPAct did put commercial 

packaged boilers and waffi1 air furnaces (which is for space heating use only) into a single item 

(EPAct, sec.122(a)(1)(B)(E), and inserted the item into the midst of the definitions for other 

added/amended items (from small commercial packaged air conditioning and heating equipment to 

storage water heaterS, .... , all of which are equipment exclusively, for space conditioning and 

service wa.ter heating purposes). EPAct, sec. 1 22(a)(1)(B). In addition, in EPCA (EPCA, 

sec.340(2)(B), 42 U.S.C.63 1 1), an item for "steam boilers (clause ix)" was included as a separate 

item, and has been retained in EPAct as a redesignated clause viii. EPAct, sec. 1 22(a)(2)(B). 

NiST believes that the intent of the statute is to designate the term "packaged boiler" as an ASi\1E 

26 FILE Q:'<iata\ee-40Iee-43143connnonlnasserilnistreplnistrept.wpd 

October 6, 1998 (7:04PM) 
heating boiler (a low-pressure stcam and hot water heating boiler) used for space conditioning 

(and service water heating) for the purpose of coverage, and designate the tenn "steam boilers" 

fbr more general applications such as industrial processes and power generation. It is noted that 

the statute does not provide a definition for steam boilers referred to in clause viii (EPAct, 

sec. 122(a)(2)@)(viii)) or establish an energy efficiency standarc! for steam boilers 

Based on the above discussion, NST agrees with the majority of the comments from the 

workshop that the coverage in a DOE test procedure for cornrnercial packaged boilers be limited 

to ASME heating boilers for space conditioning (and service water heating as in hot water supply 

boilers) only. Therefore, it is proposed that at the present time, tile scope of the DOE test 

procedure for commercial packaged boilers should be limited to low-pressure steam and hot water 

heating boilers only. Input and comments are requested on the appropriateness of this proposal 

from all interested stakeholders before a final decision is reached. 

For the purpose of di"scussion, it is also relevant to take note oTa decision made recently during an 

ASHRAE 90.1 September meeting in Chicago. url~ich resulted in the adoption of an 8,000,000 

Bhdllr limit on non-packaged boilers as equipment covered by the standards. The proposed 

wording states: 

These requirements apply to boilers with rated input of 8,000,900 Bttl/h or less that are 

not packaged boilers, and to all packaged boilers. h4inirnurn eficiency requirements for 

boilers cover all capacities of packaged boilers. 

The proposed definitions for boiler and packaged boiler for ASFIRAE 90 I- t 989R, u7ere also 

modified at the same ASHRAE meeting as follows: 

Packaged Boiler- a boiler that is shipped complete with lieating equipment, mechanical 

draft equipment, and automatic controls; shipped in one or more sections. Packaged 

boiler includes factory built boilers manufactured as a unit or system, disassembled for 

shipment and reassembled at the site. 

Boiler- a self contained low-pressure appliance for supplying stem or hot water. 

The proposed ASl3lUE wording may address some of the concerns raised by the ABMA during 

the April 1998 workshop. T-Iowever, it should be pointed out that the proposed limit on rated 

input of 8,000,000 f3szl1 or less does not apply to packaged boilers which will be covered by the 

proposed DOE test procedure. 

4.3.2 Test Procedures for Measarrement of' Energy Efficiency 

Uniformity in Test Setup and Test Conditions for a Uniform DOE Test Procedure 

As described and listed above, ASHRAE 90.1 referenced five industry test standards for rhe 

testing of gas and oil fired boilers. Four of the test standards can be applied to gas-fired boilers 

and three of them can be applied to oil fired boilers. Out of the five, two of them are for both gas 

fired and oil fired boilers. Specifically: 

FILE Q:'data\ee40\ee-43\4Xomm'~~strg,h&ept.~ 

October 6,1998 (7:04PM) 

 EE-TP-98-101 COMMENT 08CC

heating boiler (a low-pressure steam and hot water heating boiler) used for space conditioning 

(and service water heating) for the purpose of coverage, and designate the tenn "steam boilers" 

for more general applications such as industrial processes and power generation. It is noted that 

the statute does not provide a definition for steam boilers referred to in clause viii (EPAct, 

sec. 122(a)(2)(B)(viii)) or establish an energy efficiency standard for steam boilers. 

Based on the above discussion, NIST agrees w1th the majority of the comments from the 

workshop that the coverage in a DOE test procedure for commercial packaged boilers be limited 

to ASME heating boilers for space conditioning (and service water heating as in hot water supply 

boilers) only. Therefore, it is proposed that at the present time, the scope of the DOE test 

procedure for commercial packaged boilers should be limited to low-pressure steam and hot water 

heating boilers only. Input and comments are requested on the appropriateness of this proposal 

from all interested stakeholders before a final decision is reached. 

For the purpose of dtscussion, it is also relevant to take note of a decision made recently during an 

ASHRAE 90.1 September meeting in Chicago, which resulted in the adoption of an 8,000,000 

Btu/hr limit on non-packaged boilers as equipment covered by the standards. The proposed 

wording states: 

These requirements apply to boilers with rated input of 8,000,000 Btl.l/h or less that are 

not packaged boilers, and to all packaged boilers. :Minimum efficiency requirements for 

boilers cover all capacities of packaged boilers. 

The proposed definitions for boiler and packaged boiler for ASHRAE 90.1-1989R, were also 

modified at the same ASHRAE meeting as follows: 

Packaged Boiler- a boiler that is shipped complete with heating equipment, mechanical 

draft equipment, and automatic controls; shipped in one or more sections. Packaged 

boiler includes factory built boilers manufactured as a unit or system, disassembled for 

shipment and reassembled at the site. 

Boiler- a self contained low-pressure appliance for supplying steam or hot water. 

The proposed ASHRAE wording may address some of the concerns raised by the ABMA during 

the April 1998 workshop. However, it should be pointed out that the proposed limit on rated 

input of 8,000,000 Iltu!h or less does not apply to packaged boilers which will be covered by the 

proposed DOE test procedure. 

4.3.2 Test Procedures for :Measurement of Energy Efficiency 

UnifOlmity in Test Setup and Test Conditions for a Unifonn DOE Test Procedure 

As described and listed above, ASHRAE 90.1 referenced five industry test standards for the 

testing of gas and oil fired boilers. Four of the test standards can be applied to gas-fired boilers 

and three of them can be applied to oil fired boilers. Out of the five, two of them are for both gas 

fired and oil fired boilers. Specifically: 

27 FILE Q:\data\ee-40\ee.43143common'nasseri'nistrep'nistrept.wpd 

October 6.1998 (7:04PM) 
AVSUAGA 221.13 is for gas fired boiler and limits the size of the test boiler to 12,500,000 

Btu/f7. The 199 1 version of the standard set the outlet water temperature to 1 80 "F without 

specieing an inlet test temperature (a value of 80 ~zIO"F, however. is set in its Combustion 

Test section). A revision of the standard in 1993 221.13a) set the inlet temperature to 

80°F rt10"F. 

Ll 736 and LTL 795 do not provide a calculation procedure for the flue loss. They specify an 

inlet test temper&ure of 20°F below Ole outlet water temperature while limit the outlet 

temperature to no less than 200°F. 

ASME PTC 4.1 is for stearn and high temperature water boilers ody. 

* HI-I 989 is applicable to hot11 gas and oil fired boilers E-However- HI specifies a test condition 

that results in a wide range of test inlet water temperature, ranging from 35°F to 80°F With 

the outlet water temperature specified at 200°F, this could create a situation where, 

depending on test inlet temperature, two diff'erent efficiency values could be obtained and both 

would be valid. 

From the above list, it is seen that for gas-fired boilers, there are differences between the ANSI 

221. t 3 standard and the LJC, 795 and HI-1989 standards in the setting of both inlet and outlet 

water temperatures for hot water boilers 'I'he specification in the 1993 version of the ANSL 

231.13-1993a is more precise. In its comme~~ts, CEC recommended that the HI- 1989 test 

standard be adopted by DOE as the test standard for both gas-fired and oil-fired boilers. The 

revised ASERAE 90.1 under public review aiso specifies the t-11-1989 as the primary test standard 

for both gas and oil fired boilers, however, in a footnote, it listed as an option the ANSI 221 13 

for boilers with input of less than 2,500,000 Bb'h and AS-= PTC 4.1 for boilers with input 

greater than 5,000,000 Btu/h. 

As stated in the abo;e list, both gas and oil fired boilers are covered in the HI-1989 standard. 

However, in its Scope section. HI sliltes that for a gas-fired boiler, its coverage is based on test 

reports from the AGA and CGA Laboratories which complied ~4th ANSl Z21.13, which 

currently is the updated 221.13-1993a. Except the water inlet and outlet co~lditions for hot 

water boilers, the test setup, instrumentation, etc. in the HI- 1989 standard and Z2 1.13 are very 

similar. The one difference in the test setup is that the Efl-1989 standard requires insulation of rhe 

test stack to the point of flue gas temperature measurement while the 221.13 standard does not 

require any insulation. This wouId result in a higher combustion efficiency (lower calculated flue 

loss based on flue gas temperature) &on1 the ANSUAGA 221 13 procedure than the Hi- 1989 

procedure, if all other test conditions are the same. 

As stated before, the HT test standard allows a wide range of test inlet s7ater temperatures. The 

reason for this is thar in the certification program. the boilers are tested at the manufacturer's 

plant, not at the Hydronics Ir~stitute. Depending on the season and the manufacturer's 

geogaphical location, tlle inlet water ternperature from the water main (or other source) can vary 

widely. During the April 1998 workshop, GAMA stated that the difference in combustion 

efficiency due to the variation of inlet temperature might be small 

Based on the above discussion, it is seen that even though there might be some difference in the 

FILE Q:~taLe-lO\ee-43\4~on~\nishep\nimept.~ 

October 6,1998 (7:MPM) 

 EE-TP-98-101 COMMENT 08CC

• AJ.'fSI! AGA Z21.13 is for gas fired boiler and limits the size of the test boiler to 12,500,000 

Btu/h. The 1991 version of the standard set the outlet water temperature to 180°F without 

specifYing an inlet test temperature (a value of80 ±10°F, however, is set in its Combustion 

Test section). A revision of the standard in 1993 (ANSI Z21.13a) set the inlet temperature to 

80°F ±100F. 

• VL 726 and t..TL 795 do not provide a calculation procedure for the flue loss. They specify an 

inlet test temperature of 20°F below the outlet water temperature while limit the outlet 

temperature to no less than 200°F. 

• ASME PTC 4.1 is for steam and high temperature water boilers only. 

• HI-1989 is applicable to both gas and oil fired boilers. However, HI specifies a test condition 

that results in a wide range of test inlet water temperature, ranging from 35 OF to 80°F. With 

the outlet water temperature specified at 200°F, this could create a situation where, 

depending on test inlet temperature, two different efficiency values could be obtained and both 

would be valid. 

From the above list, it is seen that for gas-fired boilers, there are differences between the ANSI 

Z21.13 standard and the UL 795 and HI-1989 standards in the setting of both inlet and outlet 

water temperatures for hot water boilers. The specification in the 1993 version of the ANSI 

Z21.13-1993a is more precise. In its comments, CEC recommended that the HI-1989 test 

standard be adopted by DOE as the test standard for both gas-fired and oil-fired boilers. The 

revised ASHRAE 90.1 under public review also specifies the HI-1989 as the primary test standard 

for both gas and oil fired boilers, however, in a footnote, it listed as an option the ANSI Z21.13 

for boilers with input of less than 2,500,000 BtuJh and ASME PTC 4.1 for boilers with input 

greater than 5,000,000 Btulh. 

~ 

As stated in the above list, both gas and oil fired boilers are covered in the HI-1989 standard. 

However, in its Scope section, HI states that for a gas-fired boiler, its coverage is based on test 

reports from the AGA and CGA Laboratories which complied "with ANS[ Z21.13, which 

currently is the updated Z21.13-1993a. Except the water inlet and outlet conditions for hot 

water boilers, the test setup, instrumentation, etc. in the HI-1989 standard and Z21.13 are very 

similar. The one difference in the test setup is that the HI-1989 standard requires insulation of the 

test stack to the point of flue gas temperature measurement while the Z21.13 standard does not 

require any insulation. This would result in a higher combustion efficiency (lmver calculated flue 

loss based on flue gas temperature) from the ANSI! AGA Z21.13 procedure than the HI-1989 

procedure, if all other test conditions are the same. 

As stated before, the HI test standard allows a wide range of test inlet water temperatures. The 

reason for this is that in the certification program, the boilers are tested at the manufacturer's 

plant, not at the Hydronics Institute. Depending on the season and the manufacturer's 

geographical location, the inlet water temperature from the water main (or other source) can vary 

widely. During the April 1998 workshop, GAMA stated that the difference in combustion 

efficiency due to the vari.ation of inlet temperature might be small. 

Based on the above discussion, it is seen that even though there might be some difference in the 

28 FILE Q:'<lata\ee-40Iee-43143comm0ll\nasserilnistreplnistrept.wpd 

October 6,1998 (7:04PM) 
test conditions betwgen HI- 1989 and AZISI 221.13. the attendees of the April 1998 workshop 

suggested that the 131 test standard be used to cover both gas fired and oil fired boilers. NIST 

recommends that the HL-1989 standard be used for both gas and oil tired low-pressure steam and 

hot water boilers with a revised inlet and outlet water temperatures of SO ilO°F and 180 &2"F, 

respectively, conforming to the requirement of ANSI 22 1.13- 1993a. The practical problem of 

testing a large hot water boiler with a large required water flow rate at a conbolled inlet water 

temperature may need the pre-conditioning of the in[et water temperature in some regions of the 

country. Ho~.iever, it is observed that the procedure as specified in ANSI 231 13-1993a has been 

in practice since 1993, indicating that this may not be a major problem for a boiler of less than 

12.500,000 Rtuk rated input. The diflerence in the required outlet temperature for hot water 

boilers, of200"F by HI standard and 180°F by ANSI 221.13. may produce a slight increase in the 

combustion efficiency rating of a boiler currently rated using the HI standard due to a possibly 

lower flue gas temperature. However. it is believed that this increase is small and will have no 

effect on the minimum standard rating specified by EPAct. 

Of the other thee test standards referenced in ASI-IRA-E 90.1-1 989, the ASME PTC 4 1 standard 

is for (large) steam generating heating and power boifers requiring a detailed account of the 

energy expenditures of all components in the boiler system which ~iiould be burdensome to 

conduct for smaller capacity boilers. The Hf standard appears to he an adequate substitute for the 

ASME PTC 4.1 with respect to low-pressure stearn boilers since the test and calculation 

procedure in the HI standard is close to the simplified efficiency test (or the abbreviated efficiency 

test) of AShfE PTC 4.1. The mo UL staildards (LJL 726 and LJL795) are mainly test standards 

for safety certification testing of boilers. The test procednres in the LZ standards are similar to 

the 1-11-1989 standard except the 'efl., standards specifL an inlet water temperature of nominal 

200°F for hot water boilers. In addition, the fJL standards do not provide a calculation procedure 

for tl.le flue loss computatioi~. Ln h3ST7s opinion, the HX-1989 standard is an adequate substitute 

for the two LTL standards in the area of petfornlance testing for energy efficiency of Iow-pressure 

steam and hot water boilers. 

Based on the above discussion, NIST recommends that the H-1.989 standard be referenced as a 

single uniform DOE test standard for commercial, packaged, gas and oil fired, low-pressure steam 

and hot water boilers for space heating application, with the provision that the inlet water 

temperature for hot water boilers be specified at 80 ilOOf; and the outlet water temperature for 

hot water boilers be set at 180 k2"F. Comments are being sought from all stakeholders on this 

recommendation including the applicability ofthe specified setting of inlet water temperature for 

hot water boilers. 

For packaged high-pressure steam and high temperature hot water boilers, the only detailed test 

procedure for energy efficiency testing is ASME PTC 4.1. As discussed earlier, during an 

AS- 90. 1 h4ecRanical subcommittee meeting in Chicago (held September 9-12, 1998) the 

definitions of the terms t'or boiler and packaged boiler were modified so that a boiler was defined 

as a self contained low-pressure appliance for supplying steam or hot water. Therefore, N LS?' 

recommends that high-pressure packaged boilers not be coilsidered as covered equipment at this 

time. 

FILE Q:Lkta\ee40\ee-43\43comm~~~trep\nish'e@.wpd 

Wter 6, 1998 (7:04PM) 

 EE-TP-98-101 COMMENT 08CC

test conditions between HI-1989 and A:.'JSI Z21.13, the attendees of the April 1998 workshop 

suggested that the HI test standard be used to cover both gas fired and oil fired boilers. NIST 

recommends that the HI-1989 standard be used for both gas and oil fired low-pressure steam and 

hot water boilers with a revised inlet and outlet ,vater temperatures of 80 ±10°F and 180 ±2°F, 

respectively, conforming to the requirement of ANSI Z21.13-1993a. The practical problem of 

testing a large hot water boiler with a large required water flow rate at a controlled inlet water 

temperature may need the pre-conditioning of the inlet water temperature in some regions of the 

country. However, it is observed that the procedure as specified in ANSI Z21.13-1993a has been 

in practice since 1993, indicating that this may not be a major problem for a boiler of less than 

12,500,000 Btulh rated input. The difference in the required outlet temperature for hot water 

boilers, of 200"F by HI standard and 180°F by ANSI Z21.13, may produce a slight increase in the 

combustion efficiency rating of a boiler currently rated using the HI standard due to a possibly 

lower flue gas temperature. However, it is believed that this increase is small and will have no 

effect on the minimum standard rating specified by EPAct. 

Of the other three test standards referenced in ASHRAE 90.1-1989, the ASME PTe 4.1 standard 

is for (large) steam generating heating and power boilers requiring a detailed account of the 

energy expenditures of all components in the boiler system which would be burdensome to 

conduct for smaller capacity boilers. The HI standard appears to be an adequate substitute for the 

ASME PTC 4.1 with respect to low-pressure steam boilers since the test and calculation 

procedure in the HI standard is close to the simplified efficiency test (or the abbreviated efficiency 

test) of ASl\1E PTC 4.1. The two UL standards (IJL 726 and UL795) are mainly test standards 

for safety certification testing of boilers. The test procedures in the IJL standards are similar to 

the HI-1989 standard except the VL standards specifY an inlet water temperature of nominal 

200"F for hot water boilers. In addition, the tJL standards do not provide a calculation procedure 

for the flue loss computation. In NIST's opinion, the HI-1989 standard is an adequate substitute 

for the two u'L standards in the area of performance testing for energy efficiency of low-pressure 

steam and hot water boilers. 

Based on the above discussion, NlST recommends that the HI-1989 standard be referenced as a 

single uniform DOE test standard for commercial, packaged, gas and oil fired, lmv-pressure steam 

and hot water boilers for space heating application, with the provision that the inlet water 

temperature for hot water boilers be specified at 80 ±lOOF and the outlet water temperature for 

hot water boilers be set at 180 ±2 oF. Comments are being sought from all stakeholders on this 

recommendation., including the applicability of the specified setting of inlet water temperature for 

hot water boilers. 

For packaged high-pressure steam and high temperature hot water boilers, the only detailed test 

procedure for energy efficiency testing is ASME PTC 4.1. As discussed earlier, during an 

ASHRAE 90.1 Mechanical subcommittee meeting in Chicago (held September 9-12, 1998) the 

definitions of the terms for boiler and packaged boiler were modified so that a boiler was defined 

as a self contained low-pressure appliance for supplying steam or hot water. Therefore, NIST 

recommends that high-pressure packaged boilers not be considered as covered equipment at this 

time. 

29 FILE Q:ldatalee-401ee-43143common'nasseri'cistrep'cistrept.wpd 

October 6, 1998 (7:04PM) 
Provisions for Low Temperature A~plications 

The issue of a hot water boiler designed for low temperature applications (supply water of 140°F 

or return water temperature of 120°F, or below) was raised and discussed during the Apr-il 1998 

u7crkshop. ASHIWE 90.1 and the test standards referenced by ASHIXAE 90. I. do nor specifically 

provide test conditions tbr testing tliis type of application, since this type of boiler, which is 

designed to be used only in the low temperature range, may not be yet on the market the 

comments of the attendees to the workshop were that it was not necessary for DOE to develop 

another set of test conditions deviating from the test conditions specified in the ASHRAE 90.1 

referenced test standards at the present time. That is, special provisions to specifji a lower hot 

water or~tletemperature different from that specified in the referenced test standards (of 180°F 

or 200°F) are not needed. NTST agrees with the attendees' comments and does not recomnrer~d a 

different set of test iglet and outlet water temperatures for this type of applications that require a 

low supply and return temperature setting. 

Provision for Condensing Boilers 

The issue of testing a condensing boiler (a hot water boiler designed to condense part of the water 

vapor in the flue gases and equipped wit11 a means of collecting and draining this condensate) was 

raised and discussed during the DOE April 1998 workshop. AS- 90.1 and the test 

standards referenced by AST-ZRAE 90 1 do not specifically provide test conditions for testing a 

condensing boiler. Further, since commercial condensing boilers may not be on the market, the 

comments of the attendees to the workshop. u7ere that it was not necessary for DOE to develop a 

test procedure that is different from the test procedrxe specified in the ASlXkXE 90.1 referenced 

test standards at the present time NIST disagrees with the comments from the cvorkshop 

attendees on this issue. Since a condensing boiler =.ill provide a significantly higher eEciency, 

h'1:ST believes that even if there is no com~nercial condensing boiler on the market at the present 

time, a test procedure sho~~ld be provided for my future n~anufactrlrers of condensing boilers in 

order to give credit for their effort in providing users a product with a higher eEciency. In 

addition, a test procedure is needed for the future design option evaluation for the minirnun~ 

efficiency standard. It is noted that even though the AS- 90.1 referenced test standards do 

not specify a test procedure, there is an industry test procedure, the ASHRAE standard 103-1993, 

for measuring the insrased energy efficiency of a residential condensing boiler under- steady skte 

test condition. The test procedure has been in practice over the last decade. ?'l~erefore, NlST 

recommends adopting the test procedure as specified in section 9.2 and 11.3.7 of ASM 

Standard 103- 1993 as an optional test procedure for the determination of the increment in energy 

efficiency due to the condex~sing feature of a condensing boiler. 

Modular Boilers and %Ir~ftiple Boilers 

The issue of how to test a modular boiler assembly (consisting of a group of individual smaller 

boilers or modules installed as a unit i.4 th no intervening stop valves) or a mul tipl e boiler assembly 

(consisting of a group of individual boilers installed as a unit '~vid~ intenrening stop valves between 

the individual boilers) was raised during the DOE April 1998 workshop. Since a modular boiler 

assembly or a multiple boiler assembly usually consisted of individual boilers or modules of similar 

design and construction, KIST recommends that for those type of commercial packaged boilers, a 

30 FILE Q:Llataiee-lO\ee-43\4kommon~\nish~\ni~pt.wpd 

October 6,1998 (7:04PM) 

 EE-TP-98-101 COMMENT 08CC

Provisions for Low Temperature Applications 

The issue of a hot water boiler designed for low temperature applications (supply water of 140°F 

or return water temperature of 120°F, or below) was raised and discussed during the April 1998 

workshop. ASHRAE 90.1 and the test standards referenced by ASHRAE 90.1 do not specifically 

provide test conditions for testing tIus type of application, since this type of boiler, which is 

designed to be used only in the low temperature range, may not be yet on the market, the 

comments of the attendees to the workshop were that it was not necessary for DOE to develop 

another set oftest conditions deviating from the test conditions specified in the ASHRA.E 90.1 

referenced test standards at the present time. That is, special provisions to specify a lower hot 

water outlet temperature different from that specified in the referenced test standards (of 180"F 

or 200°F) are not needed. NIST agrees with the attendees' comments and does not recommend a 

different set of test iQ.let and outlet water temperatures for this type of applications that require a 

low supply and return temperature setting. 

Provision for Condensing Boilers 

The issue of testing a condensing boiler (a hot water boiler designed to condense part of the water 

vapor in the flue gases and equipped wi.th a means of collecting and draining this condensate) was 

raised and discussed during the DOE April 1998 workshop. ASHRAE 90.1 and the test 

standards referenced by ASHRAE 90.1 do not specifically provide test conditions for testing a 

condensing boiler. Further, since commercial condensing boilers may not be on the market, the 

comments of the attendees to the workshop, were that it was not necessary for DOE to develop a 

test procedure that is different from the test procedure specified in the ASHRAE 90.1 referenced 

test standards at the present time. NIST disagrees with the comments from the workshop 

attendees on this issue. Since a condensing boiler will provide a significantly higher efficiency, 

NiST believes that even if there is no commercial condensing boiler on the market at the present 

time, a test procedure should be provided for any future manufacturers of condensing boilers in 

order to give credit for their effort in providing users a product \vith a higher efficiency. In 

addition, a test procedure is needed for the future design option evaluation for the minimum 

efficiency standard. It is noted that even though the ASHRAE 90.1 referenced test standards do 

not specify a test procedure, there is an industry test procedure, the ASHRAE standard 103-1993, 

for measuring the in~reased energy efficiency of a residential condensing boiler under steady state 

test condition. The test procedure has been in practice over the last decade. Therefore, NJST 

recommends adopting the test procedure as specified in section 9.2 and 11.3.7 of ASHRAE 

Standard 103-1993 as an optional test procedure for the determination of the increment in energy 

efficiency due to the condensing feature of a condensing boiler. 

Modular Boilers and Multiple Boilers 

The issue of how to test a modular boiler assembly (consisting of a group of individual smaller 

boilers or modules installed as a unit ":'lith no intervening stop valves) or a multiple boiler assembly 

(consisting of a group of individual boilers installed as a unit with intervening stop valves between 

the individual boilers) was raised during tlle DOE April 1998 workshop. Since a modular boiler 

assembly or a multiple boiler assembly usually consisted of individual boilers or modules of similar 

design and construction, NIST recommends that for those type of commercial packaged boilers, a 

30 FILE Q:\data\ee-40\ee-43\43common\nasserilnistreplnistrept.wpd 

October 6, 1998 (7:04PM) 
single boiler from the assen~bly be tested and its efficiency be applied as the efliciency rating of the 

boiler assembly. 

Testing a Stem1 and Hot Water Boiler as a Stearn Boiler 

The current industry practice of testing a steam and hot water boiler as a steam boiler and 

reporting the eficierfcy sating as applicable to the boiler sold as a hot water boiler was discussed 

during the DOE April 1 998 workshop. Since the stem7 test will general1 y provide an efficiency 

rating lower than the rating obtained by a hot water test; the comments suggested that this 

practice should be allowed in a DOE test procedure. WST agrees with this and is proposing 

today that mar~ufacturers be allo\ved the option of repor-Gng the eficiency rating of'a steam and 

hot water boiler from the test result obtained Izy testing the boiler as a steam boiler. Additionally. 

at the option of the manufacturers, the water version of a steam and water boiler may be tested as 

a water boiler. 

4.3.3 Packaged Boiler Used tAas Hot Water Supply Boiler 

Hot water supply boilers are designed and marketed to provide service water heating. Addendum 

n to AS- Standard 90.1-1989 requires hot water supply boilers to meet the same energy 

efficiency requirements as water heaters. NIST recommends that the DepartJn~erit consider 

adoptioi~ of the .4SHlME approach related to con~mercial hot water supply boilers, requiring hot 

water supply boilers to meet the energy eEciency standards for comnlercial water heaters. 

During the April 1998 cvorkshop. the testing of a boiler that is used as a hot water supply boiler 

was discussed. The statute does not specifically list the term "hot water supply boiler" in the 

EPAct definitions for water heaters. EPAct, Sec. 122(a)(l)fB)(F) I-Iowever, the definition for an 

"unfired hot water swrage tank" was included. Sec. 122(a)(I)(B)(F), In certain installations, the 

hot water in an unfired hot water storage tank is supplied by a hot water supply boiler. As 

discussed in 4.2.2, the addendum n to AS^^ Standard 90.1-1989 requires hot water supply 

boiiers to meet the same energy eEciency requiremer~is as instantaneous water heaters. Avaiiab te 

evidence appears to indicate that this equipment meets the stamtory definition of water heaters 

EPCA fj340(12)(A). Therefore; NST recommends that the Department consider adoption of the 

ASHRAE approach related to commercial hot water supply boilers. 

4.3.4 Proposed 'I'est Procedures for Commercial "Packaged" Boiiers 

hTST reccrnlnlei~ds a test procedure for measurenleilt of the enersy cons~~mption ad energy 

efficiency of Commercial "Packaged" Boilers, as outlined in Appendix E. 

FILE Q:\data\ee4Ok-43\43commm~seri\nistrepWept wpd 

October 6,1998 (7:MPM) 

 EE-TP-98-101 COMMENT 08CC

single boiler from the assembly be tested and its efficiency be applied as the efliciency rating of the 

boiler assembly. 

Testing a Steam and Hot Water Boiler as a Steam Boiler 

The current industry practice of testing a steam and hot water boiler as a steam boiler and 

reporting the efficiettcy rating as applicable to the boiler sold as a hot water boiler ,vas discussed 

dUling the DOE April 1998 workshop. Since the steam test Vvill generally provide an efficiency 

rating lower than the rating obtained by a hot water test, the comments suggested that this 

practice should be allowed in a DOE test procedure. NIST agrees with this and is proposing 

today that manufacturers be allowed the option of reporting the efficiency rating of a steam and 

hot water boiler from the test result obtained by testing the hoiler as a steam boiler. Additionally, 

at the option of the manufacturers, the water version of a steam and water boiler may be tested as 

a water boil er. 

4.3.3 Packaged Boiler Used As Hot Water Supply Boiler 

Hot water supply boilers are designed and marketed to provide service water heating. Addendum 

n to ASHRAE Standard 90.1-1989 requires hot water supply boilers to meet the same energy 

efficiency requirements as water heaters. NIST recommends that the Departrnent consider 

adoption of the ASHRAE approach related to commercial hot water supply boilers, requiring hot 

water supply boilers to meet the energy efficiency standards for commercial water heaters. 

During the April 1998 workshop, the testing of a boiler that is used as a hot water supply boiler 

was discussed. The statute does not specifically list the tenn "hot water supply boiler" in the 

EPAct definitions for water heaters. EPAct, Sec. 122(a)(1)(B)(F). However, the definition for an 

"unfired hot water stcrage tank" was included. Sec.122(a)(1)(B)(F), In cel1ain instaHations, the 

hot water in an unfired hot ,\-vater storage tank is supplied by a hot water supply boiler. As 

discussed in 4.2.2, the addendum n to ASHR..A..E Standard 90.1-:1989 requires hot water supply 

boilers to meet the same energy efficiency requirements as instantaneous water heaters. Available 

evidence appears to indicate that this equipment meets the statutory detlnition of water heaters 

EPCA §340(12)(A). Therefore, NIST recommends that the Department consider adoption of the 

ASHRAE approach related to commercial hot water supply boilers. 

4.3.4 Proposed Test Procedures for Commercial "'Packaged" Boilers 

NiST recommends a test procedure for measurement of the eneq,1)' consumption and energy 

efficiency of Commercial "Packaged" Boilers, as outlined in Appendix E. 

31 FILE Q:\data\ee-40\ee-43\43connnon'nasserilnistreplnistrept.wpd 

October 6.1998 (7:04PM) 
4.4 Test Protocols for Commercial Furnaces 

4.4.1 General Discussions 

This subsection discusses the main issues identified for the commercial furnaces. The issues are 

categorized under ASW 90.1 referenced test standards, the definition of' thernd efficiency. 

and the test procedures for the measurement of energy efxciency . 

4.4.2 ASHKAE 90.1 Referenced Test Standards 

EPCA requires that the testing procedures for measuring the efficiency of commercial warn air 

furnaces shall be those gerleralfy accepted industry testing procedures or rating procedures 

developed or recognized by the American Society of Heating, Refrigera~ing and Air Conditioning 

Engineers, as referenced in AS-IIES Standard 90.1 and in effect on June 30. 1392. And if 

such an industry test procedure or rating procedure for warm air hrnaces is amended, the 

Secretary of Energy is required to adopt such revisions unless the Secretaq determines that to do 

so would not produce test results which reflect energy efficiency, energy use, and estimated 

operating costs, and would be burdensome to conduct. 

As referenced in ASHME 90.1 and in effect on June 30, 1992, there is one industry test standard 

for gas fired furnaces and one for oil fired furnaces. These include the American National 

Standard Institute ANSlZ21.47-1987 for gas-fired central furmaces (.ANSI 221.47) and the 

Undermi ters Laboratory Standard 727- 1986 for oil -fired central furnaces (UL 727:). Since the 

year 1989, both industry test standards have gone through multiple revisions. AXSI 221.47-1987 

was revised to AiYSI 22 1.47-1993, and UL, 727-1986 was revised to L;'f, 727-1994. Also, 

ASFiRAE 90.1-1989 itself 1tia.s revised via Addenda 90. Ib, 90. Id, and 90. le in 1992, 90.1.c, 

90.1% and 90.1 i in 1993, and 90.1rn-1995 and 90. In- 1997. Currently, a revision to ASHRM 

90.1-1989, named ASW 90.1-1989R, is going through the ASHRAE pt~biic review process. 

Of the two industry test standards revised after June 30. 'I 992, there is no change in tlie energy 

performance test sections of either test standards from their prior versions. Therefore, MST 

recommends that DOE incorporate by reference the latest versions of the two referenced test 

procedures. These test standards are ANSI 22 1.47- 1993 .for gas-fired central furnaces and UL 

727-1994 for oil-fired central &maces. 

4.4.3 Definition of Thermal EI'Eciency 

EPCA specifies the term thermal ef3;ciency for wm air furnaces The referenced test standards 

explicitly (ANSX 221.47) or implicitly (L1L 727) specified the calculation of the thermal efficiency 

(221.47) or efficiency (UL 727) as equal to (100 - percent flue loss), which is the customary 

definition of combustion efficiency for fossil-fueled equipment During the April 1998 workshop, 

the issue was raised as to whether the energy descriptor as defined in the statute should be 

renamed from thermal efficiency to colnbustion efficiency The consensus of the attendees to the 

urorkshop were that in a DOE test procedure, the term thermal efficiency should remain as 

specified in the statute Therefore, hTST recommends that DOE use the thermal efficiency as the 

energy descriptor for cornrnercial warm air h~aces and define it as equal to 100 mirlus the 

perceilt flue loss, consi ste~lt with industry practice. 

FILE Q:Lb.taiee-40\ee-43W3wmmm~\nistrep~e@.wpd 

Octoba 6,1998 (7:04PM) 

 EE-TP-98-101 COMMENT 08CC

4.4 Test Protocols for Commercial Furnaces 

4.4.1 General Discussions 

This subsection discusses the main issues identified for the commercial furnaces. The issues are 

categorized under ASHRAE 90.1 referenced test standards, the definition of thermal efficiency, 

and the test procedures for the measurement of energy efficiency. 

4.4.2 ASHR..<\E 90.1 Referenced Test Standards 

EPCA requires that the testing procedures for measuring the efficiency of commercial warm air 

furnaces shall be those generally accepted industry testing procedures or rating procedures 

developed or recognized by the American Society of Heating, Refrigerating and Air Conditioning 

Engineers, as referenced in ASHRAEIIES Standard 90.1 and in effect on June 30, 1992. And if 

such an industry test procedure or rating procedure for warm air furnaces is amended, the 

Secretary of Energy is required to adopt such revisions unless the Secretary determines that to do 

so would not produce test results which reflect energy efficiency, energy use, and estimated 

operating costs, and ""muld be burdensome to conduct. 

As referenced in ASHRAE 90.1 and in etrect on June 30, 1992, there is one industry test standard 

for gas fired furnaces and one for oil tired furnaces. These include the American National 

Standard Institute ANSI Z21.47-1987 for gas-fired central furnaces (ANSI Z21.47) and the 

Underwriters Laboratory Standard 727-1986 for oil-fired central furnaces (UL 727). Since the 

year 1989, both industry test standards have gone through multiple revisions. ANSI Z21.47-1987 

was revised to AJ.~SI Z21.47-1993, and UL 727-1986 was revised to tTL 727-1994. Also, 

ASHRAE 90.1-1989 itselhvas revised via Addenda 90.1b, 90.ld, and 90.Ie in 1992, 90.1c, 

90.1g, and 90.1i in 1993, and 90.1m-1995 and 90.1n-1997. Currently, a revision to ASHRAE 

90.1-1989, named ASHRAE 90.1-1989R, is going through the ASHRAE public review process. 

Of the two industry test standards revised after June 30, 1992, there is no change in the energy 

performance test sections of either test standards from their prior versions. Therefore, NIST 

recommends that DOE incorporate by reference the latest versions of the two referenced test 

procedures. These test standards are ANSI Z21. 47-1993 for gas-fired central furnaces and UL 

727-1994 for oil-tIred central furnaces. 

4.4.3 Definition of Thermal Efficiency 

EPCA specifies the term thermal eniciency for warm air furnaces. The referenced test standards 

explicitly (ANSI Z21.47) or implicitly (UL 727) specified the calculation of the thermal efficiency 

(Z21.47) or efficienc), (UL 727) as equal to (100 - percent flue loss), which is the customary 

definition of combustion efficiency for fossil-fueled equipment. During the April 1998 workshop, 

the issue was raised as to whether the energy descriptor as defined in the statute should be 

renamed from thermal efficiency to combustion efficiency. The consensus of the attendees to the 

workshop were that in a DOE test procedure, the term thermal efficiency should remain as 

specified in the statute. Therefore, Nl:ST recommends that DOE use the thermal efficiency as the 

energy descriptor for commercial warm air furnaces and define it as equal to 100 minus the 

percent flue loss, consi stent with indusny practice. 

32 FILE Q:\datalee-40\ee-43\43common\nasseri'cistreplnistrept.wpd 

October 6,1998 (7:04PM) 
4.4.4 Test Procedures bbr the Measurement of Energy Efficiency 

Flue Loss Calculation for Oil Fired Furnaces 

As stated above, the referenced test standard for oil fired furnaces, UL 727, does not provide a 

calculation procedure for the determination of flue loss. However; the value fur the percent loss is 

needed for determining the efficj ency To obtain a value for the il tle loss, the flue loss cdciilation 

as specified in the ASHRAE 90.1 referenced test standard for oil fired boilers - the 1989 edition 

of the Hydronics Institute Testing and Rating Standard for Heating Boilers, was suggested as the 

procedure for calculating the flue l oss of an oil fired furnace. There was no comment opposing 

that suggestion during he DOE April 1998 workshop. NIST is therefore proposing that the 

calculation procedure for flue loss as specified in the f 989 Hydronics Institute testing and rating 

standard for oil-fired9boiiers be adopted as the calculation procedure for flue loss for oii-fired 

furnaces. 

Condensing Furnaces 

The issue of testing a condensing furnace (a warm air furnace designed to condense part of the 

water vapor in the flue gases and is equipped with a means of collecting and draining this 

condensate) was raised and discussed during the DOE April. 1098 workshop ASI-RAE 90.1 and 

the two test standards referenced by ASHRAE 90 1 do not specifically provide test conditions for 

testing a condensing f~~mace. Attendees at the April 1998 worksliop from the furnace industry 

(GAFMA, York International, and Lennox) stated that there are very feu;, if any, commercial 

(unitary equipmenz or roofiop) condensirlg furnaces on the market, and jt is dif'ficult to include the 

provision required of a condensing furnace in a roof-top installation. Therefore. it is not necessary 

to have a provision in a DOE test procedure for testing the coildensing feature of a commercial 

&mace at the present time 

The Department of Energy disagrees with the comnlents from the workshop attendees on this 

issue. Since a condensing furnace will protide a significantiy higher effxciency, DOE believes that, 

even if there is no con~mercial conde~~sing furnace on the market at the pi-esei~t time, a test 

procedure should be provided for any future manufacturers of condensing fbrnaces in order to 

give credit for their effort in providing users a product with a higher efficiency. In addition, a test 

procedure is needed for the fiiture design optiorl evaluation for the minimum effxciency standard. 

It is noted that even though the ASHRM 90. I referenced test standards do not specify a test 

procedure. there is an industry test procedure, the ASHK4E standard 103-1993, for measuring 

the increased energy efficiency of a residential condensing furnaces under steady state test 

condition. Tbat test procedure has been in use for the evaluation of the energy efficiency of 

residential central &mace over the last decade. Therefore, NIS'T recommends adopting the test 

procedure as specified in section 9.2 and 1 1.3.7 of ASHEL4E Standard 103-1993 as an optional 

test procedure for the determination ofthe increment in energy eMiciency due to the condensing 

feature of a condensing furnace. 

4.4.5 Proposed Test Procedures for Commercial Furnaces 

XIST recommends a test procedure for measurement of the energy consumption and energy 

efficiency of commercial fuxnaces, as outlined in Appendix F. 

33 FILE Q:bta\ee-40\ee-43\4komm~~strep~ept.wpd 

October 6, 1998 (7:04PM) 

 EE-TP-98-101 COMMENT 08CC

4.4.4 Test Procedures for the Measurement of Energy Efficiency 

Flue Loss Calculation for Oil Fired Furnaces 

As stated above, the referenced test standard for oil fired furnaces, UL 727, does not provide a 

calculation procedure for the determination of flue loss. However, the value for the percent loss is 

needed for determining the efficiency. To obtain a value for the tlue loss, the flue loss calculation 

as specified in the ASHRAE 90.1 referenced test standard for oil fired boilers - the 1989 edition 

of the Hydronics Institute Testing and Rating Standard for Heating Boilers, was suggested as the 

procedure for calculating the flue loss of an oil fired furnace. There was no comment opposing 

that suggestion during the DOE April 1998 workshop. NISI' is therefore proposing that the 

calculation procedure for flue loss as specified in the 1989 Hydronics Institute testing and rating ~ 

standard for oil-fired boilers be adopted as the calculation procedure for flue loss for oil-fired 

furnaces. 

Condensing Furnaces 

The issue of testing a condensing furnace (a warn1 air fumace designed to condense part of the 

water vapor in the flue gases and is equipped with a means of collecting and draining this 

condensate) was raised and discussed during the DOE April 1998 workshop. ASHRAE 90.1 and 

the two test standards referenced by ASHRAE 90.1 do not specifically provide test conditions for 

testing a condensing furnace. Attendees at the April 1998 workshop from the furnace industry 

(GA..t\1A, York International, and Lennox) stated that there are very few, if any, commercial 

(unitary equipment or rootlop) condensing furnaces on the market, and it is diff'icult to include the 

provision required of a condensing furnace in a roof-top installation. Therefore, it is not necessary 

to have a provision in a DOE test procedure for testing the condensing feature of a commercial 

furnace at the present time. 

The Department of Energy disagrees with the comments from the workshop attendees on this 

issue. Since a condensing furnace will provide a significantly higher efficiency, DOE believes that, 

even if there is no commercial condensing fumace on the market at the present time, a test 

procedure should be provided for any future manufacturers of condensing furnaces in order to 

give credit for their ~'fort in providing users a product with a higher efficiency. In addition, a test 

procedure is needed for the thture design option evaluation for the minimum efficiency standard. 

It is noted that even though the ASHRAE 90.1 referenced test standards do not specify a test 

procedure, there is an industry test procedure, the ASHRAE standard 103-1993, for measuring 

the increased energy efficiency of a residential condensing furnaces under steady state test 

condition. That test procedure has been in use for the evaluation of the energy efficiency of 

residential central furnace over the last decade. Therefore, NIST recommends adopting the test 

procedure as specified in section 9.2 and 11.3.7 of ASHRAE Standard 103-1993 as an optional 

test procedure for the determination of the increment in energy efficiency due to the condensing 

feature of a condensing furnace. 

4.4.5 Proposed Test Procedures for Commercial Furnaces 

NiSI' recommends a test procedure for measurement of the energy consumption and energy 

efficiency of commercial furnaces, as outlined in Appendix F. 

33 FILE Q:'data\ee-40\ee-43\43connnonlnasserilnistreplnistrept.wpd 

October 6, 1998 (7:04PM) 
4.5 Test Protocols for Commercial Air Conditioners and Heat Pumps 

During the April 1998 public workshop, discussions were held with representatives from the ARI, 

its manufacturer members, and Federal and state agencies on issues related to the test proiocols 

for commercial air cgi~diti oners and heat pumps. Also, letters were subsequently received from 

Mr. William Keese, California Energy Con~mission. (dated May 28, 1998) and Mr. Lawrence R. 

N'ethj e, Air-Conditi oning and Refrigeration Institute, (dated May 3, 1 998 .) 

4.5.1 General Discussionls 

This subsection disc~isses the mail1 issues identified for the conlmerciai air co~lditioners and heat 

pumps. The issues are categorized under heat pumps with hedting-only filncxion and computer 

room air conditioners. 

4.5.2 Heat Pumps with Heating-only Function 

The heat pumps with heating-only functions do not appear to fall within the statutory definition 

for covered equipment (Title 12, Chapter 77, sec. 63 11 (8), (9j, f 10)). This obsewation is of little 

practical consequence because, based on the information obtained from five major I-ILiAC 

manufacturers and MU, heating-only heat pumps are neither available on the U.S. market at this 

time nor are expected any time soon. 

4.5.3 Computer Room Air Conditioners 

A short data collection effort was conducted to obtain information about the computer room air 

conditioners. The HVACIR Directory Source Guide published by the Air Conditioning, Heating 

(y: Refrigeration Ne~s (January 12. 1998) lists about thirty suppliers of air conditioners for data 

processing rooms. Over one half of the Listed manufacturers supply spot coders or "portable" 

cooling systems; which are used for backup cooling if the main cooling system either fails or falls 

short. Among the manufacturerslsuppliers of prirnaq cooling systems for computer rooms, there 

appear to be Gve or six key players including I.,iebert, Data Aire, Stulz, Air-Flow, artd 

Compu-Aire. 

Desis Differences 

While the basic design concept and vital components of computer room air conditioners are the 

same as those of human comfort. air conditioners, certain design features are indeed different. 

These rnacl~ines are typically designed to operate over a significantly smaller deadband around tlie 

set points, both for the temperature as well as for the humidity ratio. Accordingly, in addition to 

producing the desired cooling effect, these machines nlust also have the ability to 

hurnidifjddehumidify and reheat the air. The design latent capacity typically represents 15% of the 

total load, which is below that for comfort air conditioning. The ~rrost common settings for 

computer room air conditioner is a temperature of 72 "F and a relative humidity of 50%. In order 

to maintain a tighter corltrol over the humidity ratio, fieyuent dehumidification is required. This 

dehumidification may have to be acliieved by activating the unit to cod the air eveil under 

conditions when the temperature alone does not warrant it. This would push the temperature 

below the set point, which is then corrected by reheating the air. In order to accomplish all this, 

most computer room air conditioners irtcorporate sophisticated control systems, which add to the 

34 FILE Q:~ta\ee4O\ee-43\4komm~~nistrephstrept.wpd 

Octoba 6,1998 (7:04PM) 

 EE-TP-98-101 COMMENT 08CC

4.5 Test Protocols for Commercial Air Conditioners and Heat Pumps 

During the April 1998 public workshop, discussions were held with representatives from the ARl, 

its manufacturer members, and Federal and state agencies on issues related to the test protocols 

for commercial air c~nditioners and heat pumps. Also, letters \vere subsequently received from 

Mr. William Keese, California Energy Commission, (dated .May 28, 1998) and I\1r. LawTence R. 

\Vethje, Air-Conditioning and Refrigeration Institute, (dated I\1ay 4, 1998.) 

4.5.1 General Discussions 

This subsection discusses the main issues identified for the commercial air conditioners and heat 

pumps. The issues are categorized under heat pumps with heating-only function and computer 

room air conditioners. 

4.5.2 Heat Pumps with Heating-only Function 

The heat pumps with heating-only functions do not appear to fall within the statutory definition 

for covered equipment (Title 42, Chapter 77, sec. 6311 (8), (9), (10)). This observation is oflittle 

practical consequence because, based on the infonnation obtained from five major HVAC 

manufacturers and ARI, heating-only heat pumps are neither available on the U.S. market at this 

time nor are expected any time soon. 

4.5.3 Computer Room Air Conditioners 

A short data collection effort was conducted to obtain infonnation about the computer room air 

conditioners. The HV ACIR Directory Source Guide published by the Air Conditioning, Heating 

& Refrigeration Ne~s (January 12, 1998) lists about thirty suppliers of air conditioners for data 

processing rooms. Over one half of the listed manufacturers supply spot coolers or "portable" 

cooling systems, which are used for backup cooling if the main cooling system either fails or falls 

short. Among the manufacturers/suppliers of primary cooling systems for computer rooms, there 

appear to be five or six key players including Liebert, Data Aire, Stulz, Air-Flow, and 

Compu-Aire. 

Design Differences 

\Vhile the basic design concept and vital components of computer room air conditioners are the 

same as those of human comfort air conditioners, certain design features are indeed different. 

These machines are typically designed to operate over a significantly smaller deadband around the 

set points, both for the temperature as wen as for the humidity ratio. Accordingly, in addition to 

producing the desired cooling effect, these machines must also have the ability to 

humidify/dehumidify and reheat the air. The design latent capacity typically represents 15% of the 

total load, which is below that for comfort air conditioning. The most common settings for 

computer room air conditioner is a temperature of 72 OF and a relative humidity of 50%. In order 

to maintain a tighter control over the humidity ratio, frequent dehumidification is required. This 

dehumidification may have to be achieved by activating the unit to cool the air even under 

conditions when the temperature al<:>ne does not warr<:!cnt it. This would push the temperature 

below the set point, which is then corrected by reheating the air. In order to accomplish all this, 

most computer room air conditioners incorporate sophisticated control systems, which add to the 

34 FILE Q:\data\ee-40\ee·43\43comroonlrnsserimistrepmistrept.wpd 

October 6,1998 (7:04PM) 
The ability of the units to maintain sufficient cooling effect under extreme conditions (over a 

typical range of'O "I; to 105 "I;) is critical. The coits are usually larger and so is the air flow rate 

(typically 425-500 cfmiton as compared to 400 cfm/ton for comfort air conditioners). Another 

diEerence in design concerns sen7iceability- the units have to be designed so that they can be 

serviced under any weather conditions. Unlike a typicd comfort air conditioner, most of the 

controls and sen7ice-requiring coinporlents are located inside the building 

The reheat system may also be of a special design (low watt, finned tubular design) which would 

not- get red hot (in order to avoid the triggering of smoke detectors through the burning of dust 

particles). 

'The manufacturing quality of the computer room air conditioner components also needs to be 

superior to that of comfort air conditioner components, because the equipment needs to operate 

for longer hours each day, requiring a longer run life. 

Efficiency of Conlputer Room Air Conditioners 0 

Representatives of computer room air conditioner manufacturerslsuppiiers contended that, to 

their customers, the ability of the units to operate under severe conditions and to remain within 

the narrow tolerance lirnits is crucial, and the cost of consumed energy is not a major 

consideration. Accordingly, high energy efficiency may not always be their primary concern. Most 

of them have heard about the enerD efficiency regulations, but tend to relate these regulations to 

residential appliances. Veq few appeared to be aware of'the possibility that EPAc? provisions, 

now already in effect, could apply to their equipment At least one manufacturer is under the 

impressioi~ that their systems are exempt from regulations because they are designed for "process 

cooling environment" and not for "comfort cooling." 

When asked, most manufacturers/suppliers also did not appear to be intimidated by the EPAct 

efficiency levels (8.9 EER for small air-cooled comlnercial air conditioners and 8.5 EER for large 

air-cooled commercial air conditioners). With one exception, all representatives indicated that 

their units were already designed to operate close to the WBct Xerrels. This representative 

indicated an EER of 8.7 for most of their units. Based on conversations, it atso appeared that 

vvliile an EER of 9.0 is close to what is already available in the market, and is not considered a 

problem to meet, pushing the efficiency level up by one more point (i.e., an EER of 10.0) would 

definitely require significant changes in design and push up the equipment costs. 

California Energy C~mmission (CEC) established a certification program for computer room air 

conditioners. Under this program. manufacturers certifqi to CEC their equipment using 

mSLIASHRAE Standard 127, "hlethod of Testing for Rating Computer and Data Processing 

Room Unitary Air-Conditioners", rather than ARI Standard 2 10/240, which is stipulated by 

EPAct (via ASE-TRAE Standard 90.1). At the outset of the certif'ica~ion program. CEC tested a 

few computer room air conditioners accordins to both standards, determined equivalent levels of 

EER, and adopted EER levels for computer room air conditioners based on ASHlbE Standard 

f 27 that were equivalent to those obtained based on -4R.I Standard 3 101240. In April 1998,637 

certified computer room air conditioners were on CEC books. 

FILE Q:Lla~\ee4O\ee-43\43comm\nasseriSs~~Sstrept,wpd 

October 6,1998 (7:MPM) 

 EE-TP-98-101 COMMENT 08CC

cost. 

The ability of the units to maintain sufficient cooling effect under extreme conditions (over a 

typical range of 0 OF to 105 OF) is critical. The coils are usually larger and so is the air flow rate 

(typically 425-500 cfm/ton as compared to 400 cfm/ton for comfort air conditioners). Another 

difference in design concerns serviceability- the units have to be designed so that they can be 

serviced under any weather conditions. Unlike a typical comfort air conditioner, most of the 

controls and service-requiring components are located inside the building. 

The reheat system may also be of a special design (low watt, finned tubular design) \vhich would 

not get red hot (in order to avoid the triggering of smoke detectors through the burning of dust 

parti cI es). 

The manufacturing quality of the computer room aIr conditioner components also needs to be 

superior to that of comfort air conditioner components, because the equipment needs to operate 

for longer hours each day, requiring a longer run life. 

Efficiency of Computer Room Air Conditioners 

~ 

Representatives of computer room air conditioner manufacturers/suppliers contended that, to 

their customers, the ability of the units to operate under severe conditions and to remain within 

the narrow tolerance limits is crucial, and the cost of consumed energy is not a major 

consideration. Accordingly, high energy efficiency may 110t always be their primary concern. Most 

of them have heard about the energy efficiency regulations, but tend to relate these regulations to 

residential appliances. Very few appeared to be aware of the possibility that EPAc.:t provisions, 

now already in effect, could apply to their equipment. At least one manufacturer is under the 

impression that their systems are exempt from regulations because they are designed for "process 

cooling environment" and not for "comfort cooling." 

When asked, most manufacturers/suppliers also did not appear to be intimidated by the EPAct 

efficiency levels (8.9 EER for small air-cooled commercial air conditioners and 8.5 EER for large 

air-cooled commercial air conditioners). \Vith one exception, all representatives indicated that 

their units were already designed to operate close to the EPAct levels. This representative 

indicated an EER of 8.7 for most of their units. Based on conversations, it also appeared that 

while an EER of9.0 is close to what is already available in the market, and is not considered a 

problem to meet, pushing the efficiency level up by one more point (i.e., an EER of 10.0) would 

definitely require significant changes in design and push up the equipment costs. 

California Energy C\>mmission (CEC) established a certitkation program for computer room air 

conditioners. Under this program, manufacturers certify to CEC their equipment using 

ANSIIASHRAE Standard 127, "Method of Testing for Rating Computer and Data Processing 

Room Unitary Air-Conditioners", rather than ARI Standard 210/240, which is stipulated by 

EPAct (via ASHRAE Standard 90.1). At the outset of the certification program, CEC tested a 

few computer room air conditioners according to both standards, detennined equivalent levels of 

EER., and adopted EER levels for computer room air conditioners based on ASHRAE Standard 

127 that were equivalent to those obtained based on A.R.I Standard 210/240. In April 1998, 637 

certified computer room air conditioners were on CEC books. 

35 FILE Q:'datalee-40Iee-43143connnonlnasseri'nistrep'nistrept.wpd 

October 6, 1998 (7:04PM) 
While specific features of computer room air conditioners do not preclude them fiom achieving 

efficiency levels similar to ttlose of the majority of the air. conditioners offered on the market for 

different commercial applications, an opposing consideration comes fi-om the fact that the 

currently used procedure for testing these systems, ASHRAE Standard 127, is not stipulated by 

AS- Standard 90.1. During September 1998 ASmG 90.1 committee interim meeting 

held in Chicago, it was proposed that if computer room air conditj oners are used prin~arily for 

cooling computers, they should be outside the scope of the Standard, u711ereas if they are used 

primarily for comfort coding, they must be tested using the AN standards cited in the standard. 

Based on the above discussions, the NIST recominendatio~~ is not to illclude computer room air 

conditioners as covered equipment when used primarily for cooling con.puters. 

4.5.4 Proposed Test :Procedures for ComrnerciaI Air Conditioners and Heat Pumps 

h'IST recommends a test procedure for measurement of the energy consumption and eners~ 

efficiency of commercial Air Conditioners and Heat Pt~n~ps, as outlined in Appendix C. 

FILE Q:Lb.ta~-40\ee-43\43common~\niskep~strept.wpd 

October 6,1998 (7:MPM) 

 EE-TP-98-101 COMMENT 08CC

While specific features of computer room air conditioners do not preclude them from achieving 

efficiency levels similar to those of the majority of the air conditioners otTered on the market for 

different commercial applications, an opposing consideration comes from the fact that the 

currently used procedure for testing these systems, ASHRAE Standard 127, is not stipulated by 

ASHRAE Standard 90.1. During September 1998 ASHRAE 90.1 committee interim meeting 

held in Chicago, it was proposed that if computer room air conditioners are used primarily for 

cooling computers, they should be outside the scope of the Standard, whereas if they are used 

primarily for comfort cooling, they must be tested using the ARI standards cited in the standard. 

Based on the above siscussions, the NIST recommendation is not to include computer room air 

conditioners as covered equipment when used primarily for cooling computers. 

4.5.4 Proposed Test Procedures for Commercial Air Conditioners and Heat Pumps 

1'.ilST recommends a test procedure for measurement of the energy consumption and enerf,ry 

efficiency of commercial Air Conditioners and Heat Pumps, as outlined in Appendix G. 

36 FILE Q:\datalee-40Iee-43143common'nasserirustreprustrept.wpd 

October 6,1998 (7:04PM) 
FILE Q:~~\ee40\ee-43\4komm\nassai\nistrep~stiept.wpd 

Octoba 6,1998 (7:04PM) 

W 

-...J 

9 

t 

i 

i 

!rtf. 

oog 

0. 

Qtr 4.1997 I Qtr 1. 1998 I Qtr 2.1998 I Qtr 3.1998 I Qtr 4.1998 1 Qtr 1.1999 1 Qtr 2.1999 1 Qtr 3.1999 1 Qtr 4, 1999 

Task Name !!lay I Jun I Jul I Aug I Sep I Oct I Nov I D

I 1 I Test Procedure Preparation r ! 

14'1 Options andAltemati .... es 

Guidance Questions for DOE 

4 Response to GJidance Ouestions 

10 

11 

12 

Draft Proposed Rule language 

DOE Review 

label Options and Alternatives 

Public Participation 

stakeholder Consultation 

Wor1l:shops 

Options and Alternatives 

Draft Announcement 

13 ;:----t- Announcement Concurrence 

logistical Arrangements 

15 Workshop Session 

Transcript, DOE Response and Comments Mgmt. 

NIST Proposed Language 

--------------

191= 

Logistical Arrangements 

Announcement Concummce 

21 Workshop Session 22 I Transcript, DOE Response and Mgmt. 

f-ni Finat NOPR (optionat) 

Logistical Arrangements 

27 t- Wof1<shop Session 

__ IIIIIIo,NIST 

r 

1IIIIIIIIIIIIt-IIEnergettcs 

DOe1xs 

I 411· 

';IIIJOElt, 

-

... OE 

DOEIOCS .,1:0ElO<lS 

I'" 

DOEIOCS 

28 TranSCript, DOE Response and comp,ents Mgmt. 

II 

___ ____ 

"L 

__ 

"" 

__ "_ DOEIOCS __
FILE Q:\datake-40\ee-43\43comon~Lustiep~strept.wpd 

Octoba 6,1998 (7:04PM) 

w 

00 

1. 

I ,r 

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Sij 

\i:'l< ;{ 

10 

29 

30 

31 

32 33 

34 35 38 37 38 

39 

40 

41 

42 43 

44 

45 48 47 

48 

Qtr4,1997 Qtr 1,1998 Qt,2,1998 I Qtr 3,1998 

Task Name Oct I Nov I Dec Jan I Feb I Mar AprjMay I Jun I Jul I Aug I Sep 

Public Comment 

Regulatory Hearing 

Transcript and Comments Mgmt. 

Rule Preparation 

NOPR 

Initial Draft 

Preamble 

Rule 

DOE Concurrence 

OCS 

'U' 

EE-1 

Publication of NOPR 

Final Rule 

Revision 

DOE Concurrence 

oes 

Policy/Legal 

EE·1 

Publication of Final Rule 

Qtr4,1998 Qtr1,19j9 Qtr 2,1999 I Qtr3, 199

Oct I Nov I Dec Jan I Feb I Mar Apr I May I Jun I Jul I Aug I 

Public 

t1 9 n""",.", 

-- '" 

... 

"DC ElOCS&NIS 

.. DC E&NIST 

- ..... 

II R DO NI T 0 

-
APPENDIX A 

CORIPLL4NCE CERTIFICATION AND ENFORCE~NT SL%RIP&~G PRQCEDITQTRES 

5431.24 Units to be tested. 

For each Basic model of a commercial air conditioner, heat pump, water heater, boiler and 

furnace, any representation of energy efficiency shall be determined based on testing results such 

that: 

If the basic model is included in a DOE-approved voluntaq inclependent certification program (as 

described in paragraph (g) of $43 1.621, the represenhtion Is the mean energy efliciency of the 

basic model population, as determined using valid statistical procedures, or: 

If the basic model is not included in a DOE-approved voluntary independent certification program 

(as described in paragraph (g) of $43 1.62), a sanlple of suEcient size shall be tested to insure 

that- 

(i) any represented value of energy efficiency shall be no greater than the Iower of (A) the 

mean of the sample, or B) the Iower 95 percent coni?dence limit of the true mean divided 

by 0.95, or, 

(ii) any represented value of energy usage shall be no jess than the greater of (A) the mean of 

the sample, or (B) the upper 95 percent confidence limit of the true mean divided by 1.05. 

5431.62 Submission of data. 

(a) Compliance certification. (1) Each manufacturer or private labeler, before distributing in 

cornmerce any basic model of a covered equipment subject to the applicable energy conservation 

standard set forth inSubpan C of this part, shall certifq. to DOE (or to a DOE-approved voluntary 

independent certification program, as described in paragraph (g) of this section), by means of a 

compliance statement and a certification report, that each basic model meets the reyuirements of 

that standard on or before the effective date of the applicable energy consenfation standard as 

prescribed in section 342 of the Act. Any documentation sent to DOE by a manufacturer or 

private labeler (or his representative. such as a trade association), shall be sent by certified mail to: 

Department of Energy, OEce of Energy Efficiency and Renewable Energy, Office of Codes and 

Standards, Fonestal Building, 1000 Independence Avenue. SW, Washington, DC 20585-01 21. 

(2) The compliance statement. which shdl be sent to DOE using the fornlat set forth in this 

appe~~dix, shall certify that: 

(i) The basic model complies with the applicable energy conservation standards; 

(ii) AII required testing on which certification reports (which can be sent either directly to DOE 

or to a DOE-approved voluntary independent certification program) are based, is conducted in 

conformance with the applicable test requirements prescribed in 10 CFR Part 43 1 Subpart B, and 

all test data are reported in accordance with this subpart; 

FILE Q:idata\ee-40\ee-43\43common~\mstrep\nistrept.~ 

October 6,1998 (7:WPM) 

 EE-TP-98-101 COMMENT 08CC

APPENDIX A 

COMPLV\NCE CERTIFICATION AND ENFORCKMENT SAl\fPLING PROCEDURES 

§431.24 Units to be tested. 

For each basic model of a commercial air conditioner, heat pump, water heater, boiler and 

furnace, any represe1'ltation of energy efficiency shall be deternlined based 011 testing results such 

that: 

If the basic model is included in a DOE-approved voluntary independent certification program (as 

described in paragraph (g) of §43l.62), the representation is the mean energy efticiency of the 

basic model population, as detemlined using valid statistical procedures, or; 

If the basic model is not included in a DOE-approved voluntary independent certification program 

(as described in paragraph (g) of §431.62), a sanlple of sufficient size shall be tested to insure 

that-

(i) any represented value of energy efficiency shall be no greater than the lower of (A) the 

mean of the sanlple, or (B) the lower 95 percent contidence limit of the true mean divided 

by 0.95, or, 

(ii) any represented value of energy usage shall be no less than the greater of (A) the mean of 

the sample, or (B) the upper 95 percent confidence limit of the true mean divided by 1.05. 

§431.62 Submission of data. 

(a) Compliance certification. (1) Each manufacturer or private labeler, before distributing in 

commerce any basic model of a covered equipment subject to the applicable energy conservation 

standard set forth in tSubpart C of this part, shall certifY to DOE (or to a DOE-approved voluntary 

independent certification program, as described in paragraph (g) of this section), by means of a 

compliance statement and a certification report, that each basic model meets the requirements of 

that standard on or before the effective date of the applicable energy conservation standard as 

prescribed in section 342 of the Act. Any documentation sent to DOE by a manufacturer or 

private labeler (or his representative, such as a trade association), shall be sent by certitIed mail to: 

Department of Energy, Office of Energy Efficiency and Renewable Energy, Office of Codes and 

Standards, Forrestal Building, 1000 Independence Avenue, SW, Washington, DC 20585-012l. 

(2) The compliance statement, which shall be sent to DOE using the fomlat set forth in this 

appendix, shall certifY that: 

(i) The basic model complies ~i.th the applicable energy conservation standards; 

(ii) All required testing, on which certifi.cation reports (which can be sent either directly to DOE 

or to a DOE-approved voluntary independent certification program) are based, is conducted in 

conformance with the applicable test requirements prescribed in 10 CFR Part 431 Subpart B, and 

all test data are reported in accordance with this subpart; 

39 FILE Q:ldatalee-40lee-43143<:ommOll'nasseri\nistrep\nistrept.wpd 

October 6, 1998 (7:04PM) 
(iii) MI information reported in certification reports is true, accurate, and complete; and 0 

(iv) The manufacturer or private labeler is aware of the penalties associated with violations of the 

Act and the regulations thereunder, and 18 U.S.C. 1001 which prohibits knowingly making fdse 

statements to the Federal Government. 

(3) For each basic model of a covered equipment, the certificatiorl report. one possible fornlat for 

.cvhich is set f-brth in this appendix. shall be submitted to a DOE-approved voluntar); independent 

certification program; as described in paragraph (g) of this section, or to DOE. The certification 

report shall include the ecluipment type, equipment class (as denoted in 943 1.321, manufacturer's 

name, private labeler name(s), if applicable, the manuf'acturer's model nurnber(s), and tbr . 

(i) air-cooled three-phase electric central aj r conditioners and central air conditioning heat pumps 

less than 65,000 Btu per hour bcmling capacity), split systems or single package, the seasonal 

enera efficiency ratio and the heating seasonal performance factor. 

(iij air-cooled central air conditioners and central air conditioning heat pumps at or above 65,000 

Bt1.1 per hour (coolii~g capacity) and less than 135,000 Btu per hour (cooling capstcity), the energy 

efficiency ratio (at a temperature rating of 95 "F db) and the coeficient of perlomarice in the 

heating mode (at a high temperature rating of 47 OF db). 

(iii) water-cooled, evaporatively-cooled and water-source cer~tral air conditioners and central air 

conditioning heat pwps of less than 135.000 Btu per hour (cooling capacity), the energy 

efficiency ratio (at a standard rating of 95 "F db, for evaporatively cooled equipment, and 85 "F 

entering water temperature, for water-source and water-cooled ecluipment). 

(iv) water-source heat pumps less than 135.000 Btu per hour (cooling capacity), the coefficient of 

performance in the heating mode (at a standard rating of 70 "F entering water temperature). 

(v) air-cooled central air conditioners and central air conditioning heat pumps at or above 135,000 

Btu per hour (cooling capacity) and less than 240,000 Btu per hour (cooling capacity). the energy 

efficiency ratio (at a standard rating of 95 "F db) and the coefficient of performance in the heating 

mode (at a ligh temperature rating of47 "F db). 

(vi) water- and evaporatively-cooled central air conditioners and central air conditioning heat 

pumps at or above 135.000 Btu per hour (cooling capacity) and less than1 340,000 Btu per hour 

(cooling capacity), the energy efficiency ratio (according to AN Standard 3 00-86). 

(vii) packaged terminal air conditioners, the energy efijciency ratio (EER) in the cooling mode (at 

a temperature rating of 95 OF db). 

(viii) packaged terminal heat pumps, the energy efficiency ratio (EER) in the cooling mode (at a 

temperature rating of 95 "F db), and the coetxcient of pefiormance (COB) in the heating mode (at 

a standard rating of 47 "F db). 0 

(ix) gas- and oil-fired warm air %maces (with a capacity of 225,000 Btu per hour or more), the 

minimum thermal efficiency at the maximum rated capacity. 

(x) gas- and oil-fired con~merciai packaged boilers (with a capacity of 300,000 Btu per hour or 

40 FILE Q:\data\ee-lO\ee-43i43comon~Lu.sb'epLu.strept.wpd 

October 6,1998 (704PM) 

 EE-TP-98-101 COMMENT 08CC

(iii) All information reported in certification reports is true, accurate, and complete; and .. (iv) The manufacturer or private labeler is aware of the penalties associated with violations of the 

Act and the regulations thereunder, and 18 U.S.C. 1001 which prohibits knowingly making false 

statements to the Federal Government. 

(3) For each basic model of a covered equipment, the certification report, one possible format for 

which is set forth in this appendix, shall be submitted to a DOE-approved voluntary independent 

certification program, as described in paragraph (g) of this section, or to DOE. The certification 

report shall include the equipment type, equipment class (as denoted in §431.32), manufacturer's 

name, private labeler name(s), if applicable, the manufacturer's model number(s), and for: 

(i) air-cooled three-phase electric central air conditioners and central air conditioning heat pumps 

less than 65,000 Btu per hour (cooling capacity), split systems or single package, the seasonal 

energy efficiency ratio and the heating seasonal performance factor. 

(ii) air-cooled central air conditioners and central air conditioning heat pumps at or above 65,000 

Btu per hour (cooling capacity) and less than 135,000 Btu per hour (cooling capacity), the energy 

efficiency ratio (at a temperature rating of 95 OF db) and the coefficient of performance in the 

heating mode (at a high temperature rating of 47 OF db). 

(iii) water-cooled, evaporatively-cooled and water-source central air conditioners and central air 

conditioning heat PU{llpS ofless than 135,000 Btu per hour (cooling capacity), the energy 

efficiency ratio (at a standard rating of95 OF db, for evaporatively cooled equipment, and 85 OF 

entering water temperature, for water-source and water-cooled equipment). 

(iv) water-source heat pumps less than 135,000 Btu per hour (cooling capacity), the coefficient of 

performance in the heating mode (at a standard rating of 70 OF entering water temperature). 

(v) air-cooled central air conditioners and central air conditioning heat pumps at or above 135,000 

Btu per hour (cooling capacity) and less than 240,000 Btu per hour (cooling capacity), the energy 

efficiency ratio (at a standard rating of 95 OF db) and the coefficient of performance in the heating 

mode (at a high temperature rating of 47 OF db). 

(vi) water- and evaporatively-cooled central air conditioners and central air conditioning heat 

pumps at or above 135,000 Btu per hour (cooling capacity) and less than 240,000 Btu per hour 

(cooling capacity), the energy efficiency ratio (according to ARI Standard 360-86). 

(vii) packaged terminal air conditioners, the energy eftlciency ratio (EER) in the cooling mode (at 

a temperature rating of95 OF db). 

(viii) packaged terminal heat pumps, the energy efficiency ratio (EER) in the cooling mode (at a 

temperature rating of 95 ''F db), and the coefficient of performance (COP) in the heating mode (at 

a standard rating of 47 OF db) . .. (ix) gas- and oil-fired warm air furnaces (with a capacity of 225,000 Btu per hour or more), the 

minimum thermal efficiency at the maximum rated capacity. 

(x) gas- and oil-fired commercial packaged boilers (with a capacity of 300,000 Btu per hour or 

40 FILE Q:\data\ee-40\ee-43\43common\nasserilnistreplnistrept.wpd 

October 6, 1998 (i:04PM) 
more), the minimum combustion efficiency at the maximum rated capacity. 

(xi) electric storage water heaters, the maximum standby loss, in percent per hour, or a statement 

that the basic model has more than 140 gallon storage capacity and the tank area is fhermitllp 

insulated to R-12.5. 

(xii) gas- and oil-fired storage water heaters, the maximum standby loss, in percent per hour, or a 

statement that the basic model has more than 140 gallon storage capacity, does not include a 

standing pilot light, and the tank area is thermally insulated to R-12.5. 

(xiii) instantaneous water heaters with a storage volume of less than 10 gallons, the minimum 

thermal eEciency in percent. 

(xiv) instantaneous water heaters with a storage volume of 10 gallons or more, the minimrtm 

thermal eff'iciency in percent, and the maximun~ standby loss, in percent per hotlr, or a statement 

that the basic rnodel $as more than 140 gall on storage capad ty, does not include! a standing pilot 

light, and the tank area is thermally insulated to R-12.5. 

(XV) for unfired hot water storage tanks, the maximum heat loss (Bhr per hour per square foot of 

tank surface area), or a statement that the basic model has more than 140 gallon storage capacity, 

does not include a standing pilot light, and the tank area is thermally insulated to R-12 5. 

Cb) New models All infonxation required by paragraph (a) of this section must be submitted for 

new models prior to or concurrent with any distribution of such models. Any change to a basic 

model which affects energy consumption may constitute the addition of a new basic model subject 

to the requirements of $43 1.61 If such change does not alter compliance with the applicable 

energy consenration standard for the basic model, the new model shall he considered certified and 

not warrant additional testing. However, all information required by paragraph (a) of this section 

for the new model must be submitted either to the authorized trade association or to DOE (except 

for the compliance statement, which shall be submitted to DOE) Inforn~ation submiaed to DOE 

shall be sent, by certified mail, to: Department of Enerhy. Office of Energy Efficiency and 

Renewable Energy, Office of Codes and Standards, Forrestal Buil ding, 1000 Independence 

Avenue, SW. Washington, DC 20585-0121. 

(c) Discontinued model. A basic model is discontinued when its production has ceased and is no 

longer being distributed. Sucl~ models shall be reported to DOE, and sent by certified mail, to: 

Department of Enerjjq. Office of Enera Efficiency and Renewable Energy, OEce of Codes and 

Standards, Forrestal Building: f 000 Independence Avenue, S\V; Washington, DC 30585-012 1. 

For each basic model, this report shall include: equipment type, equipment class, the 

manufacturer's name, the private labeler name(s). if applicable, and the manufacturer's model 

number. 

(d) Maintenance of records. The manufacturer or private labeler of any covered equipn~ent 

subject to any of the energ performance standards, or procedures prescribed in this part shall 

establish, maintain, and retain the records of the underlying test data for all certification testing. 

Such records shall be organized and indexed in a fahion which rnakes them readily accessible for 

review by IIOE upon request. The records shdl include the supporting test data associated with 

4 1 FILE Q:'dat!\ee-40\ee-43\4~onM\nistrep~eptptWpd 

October 6,1998 (7:04PM) 

 EE-TP-98-101 COMMENT 08CC

more), the minimum combustion efficiency at the maximum rated capacity. 

(xi) electric storage water heaters, the maximum standby loss, in percent per hour, or a statement 

that the basic model has more than 140 gallon storage capacity and the tank area is thelmaUy 

insulated to R-12.S. 

(xii) gas- and oil-fired storage water heaters, the maximum standby loss, in percent per hour, or a 

statement that the basic model has more than 140 gallon storage capacity, does not include a 

standing pilot light, and the tank area is thennally insulated to R-12.S. 

(xiii) instantaneous water heaters with a storage volume of less than 10 gallons, the minimum 

thermal efficiency in percent. 

(xiv) instantaneous water heaters with a storage volume of 10 gallons or more, the minimum 

thermal efficiency in percent, and the maximum standby loss, in percent per hOllr, or a statement 

that the basic model J1as more than 140 gallon storage capacity, does not include a standing pilot 

light, and the tank area is thernlally insulated to R-12.S. 

(xv) for unfired hot water storage tanks, the maximum heat loss (Btu per hour per square foot of 

tank surface area), or a statement that the basic model has more than 140 gallon storage capacity, 

does not include a standing pilot light, and the tank area is thermally insulated to R-12.5. 

(b) New models. All infonnation required by paragraph (a) of this section must be submitted for 

new models prior to or concurrent with any distribution of such models. Any change to a basic 

model which affects energy consumption may constitute the addition of a new basic model subject 

to the requirements of §431.61. If such change does not alter compliance \vith the applicable 

energy conservation standard for the basic model, the neVil model shall be considered certified and 

not warrant additional testing. However, all information required by paragraph (a) of this section 

for the new model must be submitted either to the authorized trade association or to DOE (except 

for the compliance statement, which shall be submitted to DOE). Infoffilation submitted to DOE 

shall be sent, by certified mail, to: Department of Enerb:ry', Office of Energy Efficiency and 

Renewable Energy, Office of Codes and Standards, F orrestal Building, 1000 Independence 

Avenue, SW, Washington, DC 20585-0121. 

(c) Discontinued model. A basic model is discontinued when its production has ceased and is no 

longer being distributed. Such models shall be reported to DOE, and sent by certified mail, to: 

Department of Enerbf'y, Office of Energy Efficiency and Renewable Energy, Office of Codes and 

Standards, Forrestal Building, 1000 Independence Avenue, S\V, \Vashington, DC 20585-0121. 

For each basic model, this report shall include: equipment type, equipment class, the 

manufacture1.ls natne, the private labeler name(s), if applicable, and the manufacturer's model 

number. 

(d) Maintenance of records. The manufacturer or private labeler of any covered equipment 

subject to any of the energy performance standards, or procedures prescribed in this part shall 

establish, maintain, and retain the records of the underlying test data for all certification testirig. 

Such records shall be organized and indexed in a fashion which makes them readily accessible for 

review by DOE upon request. The records shall include the supporting test data associated with 

41 FILE Q:\data\ee-40\ee-43\43common\ru!sseri'cistreplnistrept.wpd 

October 6,1998 (7:04PM) 
tests performed on any test units to satisfj: the requirements of this subpart. The records shall be 

retained by the manufacturer or private labeler for a period of two years from the date that 

production of the applicable model has ceased. 

(el Third party representation. A manufacturer or private labeler may elect to use a third party to 

submit the ce&fication report to DOE (for example a trade association or other authorized 

representative). Such certification reports shall include all the information specified in paragraph 

(4(3) of this section? The certification report must be submitted with a compliance statement as 

specified in paragraph (a)i2) of this section. A third party representative may also sul~mit 

discontinued model information on behalf of an authorizing manufacturer or private labefer. 

(t3 Amendment of infom~ati on. If any compliance certification infornlati on on a statement or 

report previously submitted to DOE has changed, the manufacturer, private labeler or his 

representative must submit the re~ised information, by certified mail, either to the authorized trade 

association or to DOE at: Department of Energy, Office of Energy Efiiciency and Renewable 

Energy, Office of Codes and Standards, Fonestal Building, 1000 independence Avenue, SW, 

Washington, DC 20585-0 12 1. 

(g) Voluntary Independent certification Prosram. A DOE-approved program which meets the 

follouing criteria: 

(I) Energy efficiency perfomaizce metrics must be based on measurements. 

(2) Testing must be conducted at an independent laborator).., or under the supemision of 

independent personnel, in accordance with the prescribed DOE test procedures. 

(3) Periodic verification testing must be conducted on Iisted equipment, such that the performance 

of each basic model is checked at least every five years. 

(4) Equipment which fails verification testing must either be removed frorn production and sale, 

or be delisted. 

(5) Units selected for verification testing must be selected randomly frorn manufacnrrw's stock. 

(6) The procedures for the operation of the certification program rnrlst be published in written 

form. 

Voluntary independent certification progranx can seek DOE approval by submitting to DOE, in 

writing, information substantiating their conformance to the above criteria. 

$431.70 Enforcement. 

(a) Performance standard - (I) Test notice. Upon receiving information in writing concerning 

the energy performance of a panicular covered equipment sold by a parrjcular manufacturer or 

plivate labeler which indicates that the covered equipn~ent may not be in con~pliance with the 

applicable enerLT performance standard, according to $43 1.62, the Secretq may conduct testing 

of that covered equipment under this sr~bpart by means of a test notice addressed to the 

manufacturer or private labeler in accordance with the following requirements. 

FILE Q:'&ta\eelZO\ee-43\4Xommon~\rushephstrepttwpd 

October 6, 1998 (7:04PMf 

 EE-TP-98-101 COMMENT 08CC

tests performed on any test units to satisfY the requirements of this subpart. The records shall be 

retained by the manufacturer or private labeler for a period of two years from the date that 

production of the applicable model ha.'O ceased. 

(e) Third party representation. A manufacturer or private labeler may elect to use a third party to 

submit the certification report to DOE (for example a trade association or other authorized 

representative). Such certification reports shall include all the information specified in paragraph 

(a)(3) of this section, The certification report must be submitted with a compliance statement as 

specitied in paragraph (a)(2) of this section. A third party representative may also submit 

discontinued model information on behalf of an authorizing manufacturer or private labeler. 

(t) Amendment ofinfoffilation. [fany compliance certification information on a statement or 

report previously submitted to DOE has changed, the manufacturer, private labeler or his 

representative must submit the revised information, by certified mail, either to the authorized trade 

association or to DOE at: Department of Energy, Office of Energy Efficiency and Renewable 

Energy, Office of Codes and Standards, Forrestal Building, 1000 Independence Avenue, SW, 

Washington, DC 20585-0121. 

(g) Voluntary Independent certification Program. A DOE-approved program which meets the 

follovving criteria: 

(1) Energy efficiency performance metrics must be based on measurements. 

(2) Testing must be conducted at an independent laboratory, or under the supervision of 

independent personnel, in accordance with the prescribed DOE test procedures. 

(3) Periodic verification testing must be conducted on listed equipment, such that the perfonnance 

of each basic model is checked at least every five years. 

(4) Equipment which fails verification testing must either be removed from production and sale, 

or be delisted. 

(5) Units selected for verification testing must be selected randomly from manufacturer's stock. 

(6) The procedures for the operation of the certification program must be published in written 

fOIm. 

Voluntary independent certification programs can seek DOE approval by submitting to DOE, in 

writing, infOImation substantiating their conformance to the above criteria. 

§431.70 Enforcement. 

(a) Performance standard - (1) Test notice. Upon receiving information in writing concerning 

the energy perfomlance of a particular covered equipment sold by a paIticular manufacturer or 

plivate labeler which indicates that the covered equipment may not be in compliance with the 

applicable eneq,,}, performance standard, according to §431.62, the Secretary may conduct testing 

of that covered equipment under this subpart by means of a test notice addressed to the 

manufacturer or private labeler in accordance with the following requirements: 

42 FILE Q:lciata\ee-40Iee-43143common'nasserilnistreplnistrept.wpd 

October 6, 1998 (7:04PM) 
(2) Testing LaboratoPy. Whenever DOE conducts enforcement testing at a designated laboratory 

in accordance with a test notice under this section. the resulting test data shall constitute oficial 

test data for that basic model. Such test data will be used by DOE to make a detemiimtion of 

compliance or noncompliance if a sufficient number of tests have been conducted to satisfy the 

requirements of appendix I3 of this subpart. 

(3) Sampling. The determination that a manufacturer's basic model complies with the applicable 

energy performance standard shall be based 031 the testing conducted in accordance with the 

statistical sampling procedures set forth in this appendix atlid the test procedures set forth in 

Subpart B of this part. In the case of a basic model that has less than four units available for 

testing, all of the available units shall be tested, and the conlpliance determination based on the 

results of those measurements in a manner otherwise in accordance with appex~dix B of tfi s 

subpart. in the case of a basic model which is veiy large, the manufacturer can petition the 

Department for an exception to the nuinber of units to be tested, 'cvhicl~ if given sufficient 

justification; the Department can allow the testing of a single unit for enforcement. 

(4) Test unit selection. A DOE inspector shall select a batch, a batch sample, and test units from 

the batch sample in accordance with the provisions of this pardgraph arid the conditions spwified 

in the test notice. 

(i) The batch may basubdivided by DOE utilizing criteria specified in the test notice, e.g., date of 

manufacture, component-supplier, I ocation of manufacturing facility, or other criteria url~ich may 

differentiate one unit from another uithin a basic model. 

(ii) A batch sample of up to 20 units wiill then be randomly selected from oiie or more subdivided 

groups within the batch. The manufacturer shall keep on hand all units in the batch sample until 

such time as the basic model is determined to be in compliance or noncompliance. 

(iii) Individual test units comprising the test sample shall be randomly selected from the batch 

sample. 

(iv) ,411 random selection shall be achieved by sequentially numbering all of the units in a batch 

sample and then using a table of random numbers to select the units to be tested. 

(5) Test unit preparation. li) Prior to a.nd during testing. a test unit selected in accordance with 

paragraph (a)(4) of this section shall not be prepared, modified, or adjusted in any manner unless 

such preparation, modification, or adjustment is allowed by the applicable DOE test procedure. 

One test shall be conducted for each test unit in accordance with the applicable test procedures 

prescribed in subpart B. 

(ii) No quality control, testing or assembly procedures shall be performed on a test nnit, or any 

parts arid subassemblies thereof, that is not perfoxmed during the production and assembly of all 

other units included ?n the basic model. 

(iii) A test unit shall be considered defective if suck unit is inoperative or is found to be in 

noncompliance due to failure of the unit to operate according to the malrtfacturer's design ald 

operating instructions. Defective units, including those damaged due to shipping or handling, skall 

be reported immediately to DOE. DOE shall authorize testing of an additional unit on a 

43 FILE Q:\data\ee4O\ee-43\43comm~~shep\nistrept.wpd 

October 6,1998 (7:MPM) 

 EE-TP-98-101 COMMENT 08CC

(2) Testing Laborato'Y. Whenever DOE conducts enforcement testing at a designated laboratory 

in accordance \vith a test notice under this section, the resulting test data shall constitute offiCial 

test data for that basic model. Such test data will be used by DOE to make a detem1ination of 

compliance or noncompliance if a sufficient number of tests have been conducted to satisfy the 

requirements of appendix B of this subpart. 

(3) Sampling. The determination that a manufacturer's basic model complies with the applicable 

energy performance standard shall be based on the testing conducted in accordance with the 

statistical sampling procedures set forth in this appendix and the test procedures set forth in 

Subpart B of this part. In the case of a basic model that has less than four units available for 

testing, all of the available units shall be tested, and the compliance determination based on the 

results of those measurements in a manner otherv.1se in accordance \\tith appendix B of this 

subpart. In the case of a basic model which is velY large, the manufacturer can petition the 

Department for an exception to the number of units to be tested, which if given sufficient 

justification, the Department can allow the testing of a single unit for enforcement. 

(4) Test unit selection. A DOE inspector shall select a batch, a batch sample, and test units from 

the batch sample in accordance with the provisions of this paragraph and the conditions sp('''Cified 

in the test notice. 

(i) The batch may b&.subdivided by DOE utilizing criteria specified in the test notice, e.g., date of 

manufacture, component-supplier, location of manufacturing facility, or other criteria which may 

differentiate one unit from another \\rithin a basic model. 

(ii) A batch sample of up to 20 units will then be randomly selected from one or more subdivided 

groups within the batch. The manufacturer shall keep on hand an units in the batch sample until 

such time as the basic model is detennined to be in compliance or noncompliance. 

(iii) Individual test units comprising the test sample shall be randomly selected from the batch 

sample. 

(iv) All random selection shall be achieved by sequentially numbering all of the units in a batch 

sample and then using a table of random numbers to select the units to be tested. 

(5) Test unit preparation. (i) Prior to an.d during testing, a test llnit selected in accordance with 

paragraph (a)(4) of this section shall not be prepared, modified, or adjusted in any manner unless 

such preparation, modification, or adjustment is allowed by the applicable DOE test procedure. 

One test shall be conducted for each test unit in accordance vv'ith the applicable test procedures 

prescribed in subpart B. 

(ii) No quality control, testing or assembly procedures shall be performed on a test unit, or any 

parts and subassemblies thereof, that is not perf01med during the production and assembly of al.1 

other units included in the basic model. 

(iii) A test unit shall be considered defective if such unit is inoperative or is found to be in 

noncompliance due to failure of the unit to operate according to the manufacturer's design and 

operating instructions. Defective units, including those damaged due to shipping or handling, shall 

be reported immediately to DOE. DOE shall authorize testing of an additional unit on a 

43 FILE Q:\data\ee-40\ee-43\43common\nasserilnistreplnistrept.wpd 

October 6,1998 (7:04PM) 
case-by -case basis. 

(6) Testing at manufacturer's option. If a manufacturer's basic model is determined to be in 

noncompljance with the applicable energy perfonnar~ce star~dard at the ccmclusion of DOE testing 

in accordarice with the double sampling plan specified in appendix B of this subpart, the 

manufacturer may request that DOE conduct additional ~esting of the model accmding to 

procedures set forth in appendix B of this subpart. 

API'ENDIX C TO SUBPART F OF PART 43B--CO&fklLl[ANeE CElr;TIFI[CATTON 

Statement of ComHiance With Ex~ergg Conservation Standards for &'ornmercial 

Equipment 

Equipment: 

h4anufacturer's Name and Address 

This compliance statement and the attached certification report (or a certification report 

Reference No--l. Dated 7--p-..-.- _, filed with the DOE-approved 

voluntary independent certification program entiti ed 1 

are submitted pursuant to 10 CFR part 43 1 (Energy Conservation Program for Commercial 

Equipment) and Part C of the Energy Policy and Conservation .4ct (Pub. L. 94-163), and 

amendments thereto. It is signed by a responsible official of the above named company. The 

basic models listed i~ the attached certification report (or the certjticatioa report filed with a 

DOE-approved voluntary independent certification program and referenced above) comply with 

the applicable energ,, consenlation standard. -4ll testing on which the attached certification report 

(or the certification report filed with a DOE-approved voluntary independent certification 

program and referenced above) is based was conducted in confom~ance cvitfl applicable test 

requirements prescribed in subpart B of 10 CFR part 43 1. A1 information reported in the 

attached certification report (or the certification report filed w-ith a DOE-approved voluntary 

independent certification program and referenced above) is true, accurate, and con~plete The 

company is aw7are of the penalties associated with violations of ihe Act and the regrlations 

thereunder, and is also aware of the provisions contained in 18 U.S.C. 1001. w11ich prohibits 

knowingly making false statement to the Federal Govenunent. 

FILE Q:\da~~4O\ee-43\4~m~\niskep~strept.wpd 

Octoba 6, 2998 (7:04PM) 

 EE-TP-98-101 COMMENT 08CC

case-by-case basis. 

(6) Testing at manufacturer's option. If a manufacturer's basic model is determined to be in 

noncompliance with the applicable energy perfomlance standard at the conclusion of DOE testing 

in accordance with the double sampling plan specitled in appendix B of this subpart, the 

manufacturer may request that DOE conduct additional testing of the model according to 

procedures set forth in appendix B of this subpart. 

AP])ENO]X C TO SUBPART F OF PART 431--CUMPLIANCE CERTIFICATION 

Statement of Com~iance With Energy Conservation Standards for Commercial 

Equipment 

Equipment: 

Manufacturer's Name and Address 

This compliance statement and the attached certification report (or a certification report 

Reference No .. _" ____________________ Dated ___________ --' filed with the DOE-approved 

voluntary independent certification program entitled _______________ ---' 

are submitted pursuant to 10 CFR part 431 (Energy Conservation Program for Commercial 

Equipment) and Part C of the Energy Policy and Conservation Act (pub. L. 94-163), and 

amendments thereto. It is signed by a responsible official of the above named company. The 

basic models listed ig the attached certification report (or the certification report filed with a 

DOE-approved voluntary independent certification program and referenced above) comply with 

the applicable enerf,lJ' conservation standard. All testing on which the attached certification report 

(or the certification report filed v.1th a DOE-approved voluntary independent certification 

program and referenced above) is based was conducted in confomlance with applicable test 

requirements prescribed in subpart B of 10 CFR part 431. All information reported in the 

attached certification report (or the certification report filed with a DOE-approved voluntary 

independent certification program and referenced above) is true, accurate, and complete. The 

company is aware of the penalties associated with violations of the Act and the regulations 

thereunder, and is also aware of the provisions contained in 18 U.S.c. 1001, which prohibits 

knowingly making false statement to the Federal Government. 

44 FlLE Q:'datalee-40Iee-43143common\nasserilnistreplnistreptwpd 

Ootober 6,1998 (7:04PM) 
Title: 

Firm or Organization: 

Date: 

Name of Person to @ontact for Further Infbnnation: 

Kame: 

Address: 

Telephone 3rumber: 

Facsimile Number: 

'Third Party Representative: 

If any part of this Compliance Certification, including the attached certification report, was 

prepared by a third party orgailization under the provisions of 943 1.63 of 10 CFR 430, provide 

the following information fbr the company official who authorizeci third party representations: 

Name: 

Title: 

Address: 

'Telephone Number., . 

Facsimile Number: 

The third party organization oficially acting as representative: 

Third Party Organization: ---------------s---p-------------------------------------.------------------------- 

Name: 

Address: 

Telephone Number: 

Facsimile Number: 

Subrnit Compliance Certification in writing or on a cornputer diskette, by Certified Mail either to 

FILE Q:Lfata\ee-40\ee-43\43comon\nasMiW.shepW.strept.wpd 

Oaoba 6, 1998 (7:04PM) 

 EE-TP-98-101 COMMENT 08CC

Signature of Company Official: _______________________________________________________________________________ _ 

Name: 

Title: --------------------------------------------------------- Firm or Organization: _______________________________________ __ 

Date: 

Name of Person to Gontact for Further lnfonnation: 

Name: -------------------------------------------------------- Address: . ________________________________________________________________________________ " ________________________________________________________________________________________ _ 

Telephone Number: 

Facsimile Number: -----------------------------------------

Third Party Representative: 

If any part of this Compliance Certification, including the attached certification report, was 

prepared by a third party organization under the provisions of §431.62 of 10 CFR 430, provide 

the following information for the company official who authorized third party representations: 

Name: 

Title: 

Address: 

Telephone NumQer:,_~ ____________________ _ 

Facsimile Number: -------------------------------------------

The third party organization officially acting as representative: 

Third Party Organization: ____________________________________________________________________________________ _ 

Name: 

Address: 

Telephone Number: 

Facsimile Number: --------------------------------------------

Submit Compliance Certification in writing or on a computer diskette, by Certified Mail either to 

45 FILE Q:\data\ee-40Iee-43\43<:ommoolnasserilnisb:eplnistrept.wpd 

October 6, 1998 (7:04PM) 
the authorized trade association, or DOE at to: Department of Energy, Office of EnergyEficiency and Renewable Energy. Ofice of Codes and Star~dards, Forrestal Building, 1000 

Independence .Avenue, S W, Washington, DC' 20585-012 1. 

Certification Report for Basic Models 

(iittaciunent to Slatenlent of Conipliancz with Energy Consen.ation Standards for Coxitrnercial Equipnieiit) 

llate: 

Signature of Conipmy OK~cial or Third Pmy Representatwe: 

Equipment Type : 

.0- 

Equipment Class: 

h5mufkctltrer: 

Private Labeler (iC applicable): 

For Kelt' or Amended Models': 

For Discontinued Models': 

' Provide *cific equipment information including, for each basic modcl. the mmufactlmr's modcl numbcrs and 

the infomution required in 543 1.63. 

? Provide n~anufacturer's model nuniber 

46 FILE Q:~tl\ee40\ee-43\43common\nasseri\nish9p\nimepttwpd 

Octok 6,1998 (7:04PM) 

 EE-TP-98-101 COMMENT 08CC

the authorized trade association, or DOE at to: Department of Energy, Office of Energy 

Efficiency and Renewable Energy, Office of Codes and Standards, Forrestal Building, 1000 

Independence Avenue, SW, Washington, DC 20585-0121. 

Certification Report for Basic Models 

(Attachment to Statement of Compliance with Energy Conservation Standards for COllunercial Equipment) 

Date: 

Signature of Company Official or Third Party Representative: ________ _ 

EqillplnentType: _________________________ __ 

Equipment Class: _________________________ - _ 

~1anufacturer: ___________________________ _ 

Private Labeler (if applicable): ___________________ _ 

For New or Amended Modelsl

: 

For Discontinued Modelsz

: 

1 Provide specific equipment information including, for each basic model, the manufacturer's model numbers and 

the infonuation reqillred in §431.62. 

2 Provide manufacturer's model number. 

46 FILE Q:ldata\ee-40\ee-43\43commonlnasseri'cistrep'cistrept.wpd 

October 6, 1998 (7:04PM) 
APPENDIX B 

SAMPLING PLAN FOR ENFORCERENT TESTING 

APPENDIX B 'I'O SUBPART F OF PART 431--SAhXPLING PLAN FOR 

EN FOIXCE~IEN'I' TESTlNG 

Double Sampling 

Step I. The first san~ple size (n,) must be four or more units 

Step 2. Compute the mean (x,) of the measured energy perfornlrtnce of the n, units in the first 

sample as folfows: 

where (xi) is the measured energy efficiency or energy consumption of unit I. 

Step 3. Compute the standard deviation (s,) of the measured energy perfoxmance of the (13,) units 

in the first sample as follows: 

-.c 

Step 4. Compute the standard error ( sg ) of the measured energ performance ofthe n, units in .*- 

the first sample as follows: 

47 FILE Q:~~\ee-?O\ee-43\43commm~\nisfrq\nistrepr.~d 

October 6,1998 (7:04PM) 

 EE-TP-98-101 COMMENT 08CC

APPENDIXB 

SAMPLING PLAN FOR ENFORCEl\IENT TESTING 

APPENDIX B TO SUBPART F OF PART 431--SAl\lPLING PLAN FOR 

ENFORCKMENT TESTING 

Double Sampling 

Step 1. The first sample size (0\) must be four or more units. 

Step 2. Compute the mean (x 1) of the measured energy performance of the 01 units in the first 

sample as follows: 

(1) 

where (Xi) is the measured energy efficiency or energy consumption of unit I. 

Step 3. Compute the standard deviation (Sl) of the measured energy performance of the (Ill) units 

in the first sample as follows: 

nl 

L (Xi - x1

)2 

Sl = 

i=1 (2) 

n -1 1 

Step 4. Compute the standard error ( s- ) of the measured enerh'Y performance of the 01 units in . . ~ • XI 

the first sample as follows: 

= 

47 

(3) 

FILE Q:ldata\ee-40\ee-43\43corrunon\nasserilnistreplnistrept.wpd 

October 6,1998 (7:04PM) 
Step 5. Compute the upper control limit CUCL,) and lower control limit (ECL,) for the mean of 

the first sample using the applicable DOE energy performarlce staandard CEPS) as the desired mean 

and a probability level of95 percent (two-tailed test) as follrruis: 

LCL, = EPS - 

UCL, = EPS + ts- (5) xl 

.Owhere t is a statistic based on a 95 percent two-tailed probability level and a sample size of n,. 

Step G(a). For an Energy Efficiency Standard, compare dle mean of the first sample (=,)with the 

upper and lower control limits (UCE, and LCL,) to determine one of the following: 

(I j If the mean of the first sample is below the lower control. limit, then the basic model is in 

noncompliance and testing is at an end. @o not go on to any of the steps below.) 

(2) If the mean of the first sample is equal to or greater d~an the upper control limit, then the basic 

model is in compliance and testing is at an end. @o not go on to any of the steps belovi7.) 

(3 j If the sample meal is eq~nal to or greater than the lower control limit but less than the upper 

controf limit, then no determination of compliance or noncompliance can be made and a second 

sample size is determind by Step 7fa). 

-0- 

Step 6@). For an Ener~ Consumption Standard, compare the mean of the first sample G-.,) s+iith 

the upper and lower control limits (UCL, and LCL,) to deternine one of the following: 

(1) If the mean of the first sample is above the upper control limit, then the basic model is in 

noncompliance and testing is at an end. (Do not go on to any ofthe steps below.) 

(2) If the mean of the first sample is equal to or less than the Iower control Limit, then the basic 

model is in compliance and testing is at an end. (Do not go on to any of the steps below.) 

48 FILE Q:Lktake-40\ee-43\4Xommm~\nistrep\nistreptPtwpd 

Octoba 6,1998 (7:04PM) 

 EE-TP-98-101 COMMENT 08CC

Step 5. Compute the upper control limit (VCL]) and lower control limit (LCLI ) for the mean of 

the first sampJe using the applicable DOE energy performance standard (RPS) as the desired mean 

and a probability level 01'95 percent (two-tailed test) a<:> follows: 

= BPS (4) 

= BPS + (5) 

• 

where t is a stati stic based on a 95 percent two-tailed probability level and a sample size of n1. 

Step 6(a). For an Energy Efficiency Standard, compare the mean of the first sample (i[)with the 

upper and lower control limits (UCLI and LCL1) to determine one of the follovving: 

(1) If the mean of the first sample is below the lower control limit, then the basic model is in 

noncompliance and testing is at an end. (Do not go on to any of the steps below.) 

(2) If the mean of the first sample is equal to or greater than the upper control limit, then the basic 

model is in compliance and testing is at an end. (Do not go on to any of the steps below.) 

(3) If the sample mean is equal to or greater than the lower control limit but less than the upper 

control limit, then no determination of compliance or noncompliance can be made and a second 

sample size is detennined by Step 7(a). 

Step 6(b). For an Energy Consumption Standard, compare the mean of the first sample (x']) v,rith 

the upper and lower control limits (UCLI and LCLj ) to determine one of the following: 

(1) If the mean of the first sample is above the upper control limit, then the basic model is in 

noncompliance and testing is at an end. (Do not go on to any of the steps below.) 

(2) If the mean of the first sample is equal to or less than the lower control limit, then the basic 

model is in compliance and testing is at an end. (Do not go on to any of the steps below.) 

48 FILE Q:\data\ee-40Iee-43143eommonlnasserilnistreplnistrept.wpd 

October 6, 1998 (7:04PM) 
(3) If the sample mean is equal to or less than the upper control limit but greater than the Iower 

control limit, then no determination of compliance or rloncornpliarlce can be made and a second 

sample size is determined by Step 7@). 

0 

Step 7(a). For an Energy Efficiency Standard, deternine the second sample size (m,) as follows: 

where s, and t have the values used in Steps 4 and 5, respectively The lem "0.05 EPS" is the 

difference between the applicable energy efficiency standard and 95 percent of the standard, 

where 95 percent of the standard is taken as the tower control limit. This procedure yields a 

suff~cient combined sanlple size (n1+n2) to give an estimated 97.5 percent probability of obtaining 

a detem~ination of cornpIiance when the true mean efficiency is equal to the applicable standard. 

Given the solution value of n,, determine one of the following. 

(I) If the value of n, is less than or equal to zero and if the mean energy ef'ficiency of the first 

sample 6,) is either,equal to or greater than the lower control Iimit (LCL,) or equal to or greater 

than 95 percent of the applicable energy efficiency standard (EES), whichever is greaLer, i.e., if 

n, ( 0 and x, 2 max (I,CX,,. 0.95 EES), the basic model is in con~pliance and testing is at an end 

(2) If the value of n, is less than or equal to zero and the inem energy efficiency of the first 

sample (F3) is less than the lower control limit (LCL,) or less than 95 percent of the applicable 

enerm efficiency standard (EES), whichever is greater, i.e., if n2 5 O and x, < max (ZCL,, 

0.95 IEES), the basic model is in noncompliance and testing is at an end. 

(3) If the value of n, is greater than zero, then value of the second sample size is determined to be 

the smallest integer equal to or greater than the solution value of n, for equation (6a). If the value 

of n, so calculated is greater than 20-n,, set n, equal to 20-n, . 

Step 7@). For an Energy Consumptio~l Standard, determine the second sample size (n,) as 

follows: 

FILE Q:~ta\ee-40\ee-43\43comm\nasSenLustrep\nistreptt~ 

October 6, 1998 (7:04PM) 

 EE-TP-98-101 COMMENT 08CC

(3) If the sample mean is equal to or less than the upper control limit but greater than the lower 

contTollimit, then no detelmination of compliance or noncompliance can be made and a second 

sample size is determined by Step 7(b). 

, Step 7(a). For an Energy Efficiency Standard, determine the second sample size (n2) as follows: 

= (6a) 

where Sl and t have the values used in Steps 4 and 5, respectively. The term "0.05 EPS" is the 

difference between the applicable energy efficiency standard and 95 percent of the standard, 

where 95 percent of the standard is taken as the lower control limit. This procedure yields a 

sufficient combined sample size (n1+n2) to give an estimated 97.5 percent probability of obtaining 

a determination of compliance when the true mean efficiency is equal to the applicable standard. 

Ci1ven the solution value of n2, detelmine one of the following: 

(1) If the value of n2 is less than or equal to zero and if the mean energy efficiency of the first 

sample (x 1) is either,equal to or greater than the lower control limit (LCL]) or equal to or greater 

than 95 percent of the applicable energy efficiency standard (EES), whichever is greater, i.e., if 

"2.s 0 and x 1 ~ max (LCL1, 0.95 EES), the basic model is in compliance and testing is at an end. 

(2) If the value ofn2 is less than or equal to zero and the mean energy efficiency of the first 

sample (x l)is less than the lower control limit (LCL1) or less than 95 percent of the applicable 

energy efficiency standard (EES), whichever is greater, i.e., if n2 ::: 0 and Xl < max (LCL1, 

0.95 EES), the basic model is in noncompliance and testing is at an end. 

(3) If the value ofn2 is greater than zero, then value of the second sample size is determined to be 

the smallest integer equal to or greater than the solution value of n2 for equation (6a). If the value 

of n2 so calculated is greater than 20-n1> set n2 equal to 20-n1. 

Step 7(b). For an Energy Consumption Standard, determine the second sample size (n2) as 

follows: 

49 FILE Q:'<lata\ee-40\ee.43\43common\nasseri\nistrep\nistrept.wpd 

October 6, 1998 (7:04PM) 
where s, and t have the values used in Steps 4 and 5, respectively. The tern1 "0.05 EPS" is the 

difference between the applicable energy consumption standard and f 05 percent of the standard, 

where 105 percent of the standard is taken as zhe upper control Iimiz. This procedure yields a 

su+Xcjent combined sample size (n, + n2) to give an estimated 97.5 percent probability of 

obtaining a determination of compliance when the true mean consurnpti~i~s equai to the 

applicable standard. Given the solution value of n,, determine one of the following 

(I) If the vdue of n, is less than or equal to zero and if the mean energy consumption of the first 

sample (i,) is either equal to or less than the upper control limit JUCL,) or equal to or less than 

105 percent of the applicable energy performance standard (IEPS), whichever is less, i.e., if n, 5 O 

and x, s min /UCI,,, 1.05 EPS), the basic model is in compliance and testing is at an end. 8 

(2) If the value of n? is less than or eclual to zero and the mean energy consr1niption of the first 

sample (F,) is greater than the upper control Iirni t (UCL,) or. more than 105 percent of the 

applicable energy performance standard (EPS). whichever is less, i e., if@, 5 0 and TI > mi11 

(LCL,, 1.05 EPS), the basic model is in noncompliance and testing is at an end 

(3) If the value of n, is greater than zero, then the value of the second sample size is determined 

to be the smallest integer equal to or greater than the solution value of'a, for equation (6b). If zhe 

value ofn, so calculated is greater than 20-n,, set n2 equal to 20-11,. 

Step 8. Compute the combined mean (x-~) of the measured energy perfomlance of the n, and n, 

units of the combined first and second samples as follows: 

Step 9. Compute the standard error ( sg ) of the measured energy perfor~nanca of the n, and n2 

units in the combined first and second samples as follo-uis: 

5 0 FILE Q:idahk4O\ee-43\43comm~asserihshep~ept.wpd 

OaOtex 6,1998 (7:04PM) 

 EE-TP-98-101 COMMENT 08CC

= (6b) 

where S1 and t have the values used in Steps 4 and 5, respectively. The term HO.05 EPS" is the 

difference between the applicable energy consumption standard and 1 05 percent of the standard, 

where 105 percent of the standard is taken as the upper control limit. This procedure yields a 

sufJicient combined sample size (° 1 + 

°

2) to give an estimated 97.5 percent probability of 

obtaining a determination of compliance when the true mean consumption is equal to the 

applicable standard. Given the solution value of 

°

2, determine one of the following: 

(1) If the value ofn2 is less than or equal to zero and if the mean energy consumption of the first 

sample (x 1) is either equal to or less than the upper control limit (UCLI) or equal to or less than 

105 percent of the applicable energy performance standard (EPS), whichever is less, i.e., if n2 ::: 0 

and Xl ~ min (DCLl> 1.05 EPS), the basic model is in compliance and testing is at an end. ~ 

(2) If the value ofn2 is less than or equal to zero and the mean energy consumption of the first 

sample (x I) is greater than the upper control limit (UCLI) or more than 105 percent of the 

applicable energy perfom1ance standard (EPS), whichever is less, i.e., if 1)2 ~ 0 and Xl> min 

(LCL1, 1.05 EPS), the basic model is in noncompliance and testing is at an end. 

(3) If the value of"2 is greater than zero, then the value of the second sample size is determined 

to be the smallest integer equal to or greater than the solution value ofn2 for equation (6b). lfthe 

value ofn2 so calculated is greater than 20-nb set n2 equaJ to 20-° 1> 

Step 8. Compute the combined mean (i.-2) of the measured energy performance of the nJ and 8 2 

units of the combined first and second samples as follows: 

(7) 

Step 9. Compute the standard error ( SX2 ) of the measured enerf,'Y performance of the III and n2 

units in the combined first and second samples as follows: 

50 FILE Q:lclata\ee-40Iee-43143commonlnasseri\nistreplnisttept.wpd 

October 6, 1998 (7:04PM) 
'R'ote: s, is the value obtair~ed in Step 3. 

Step IO(a). For an Egergy Efficiency Standard; compute the lower control limit (LCL,) for the 

mean of the combined first and second samples using the DOE energy efficiency standard (EES) 

as the desired mean and a one-tailed probability level of 97.5 percent (equivalent to the hvo-tailed 

probability level of 95 percent used in Step 5) as follows: 

LCL, = EES - ts- (9a) '-3 

where the t-stati stic has the value obtained in Step 5 

Step 10Cb). For an Energy Consumption Standard; cornpute the upper control limit (UCL,) for 

the mean of the combined first and second samples using the DOE energy performance standard 

(EPS) as the desired mean and a one-tailed probability level of 102.5 percent (equivalent to the 

two-tailed probability level of 95 percent used in Step 5) as folo\vs: 

UCL, = EPS + 

6. 

where the t-statistic has the value obtained in Step 5. 

Step I l(a). For ail Energy Efficiencji Standard, compare the combined sample mean (x,) to the 

lower control limit (LCL,) to find one of the following: 

(I) If the mean of the combined sample (s,) is less than the lower co~>trol limit (LCL,) or 

95 percent of the applicable enerby efficiency standard (EES), whichever is greater, i e., if - 

x < max &CL,, 0.95 EES), the basic. model is in nonconlpfiance and testing is at an end. 

(2) If the mean of the conibined sample (6) is equal to or greater than the lower control limit 

5 1 FILE Q:\data\ee-40ke-43\4kommon~\nishep\niStrept.wpd 

October 6,1998 (7:04PW 

 EE-TP-98-101 COMMENT 08CC

s-Xz 

Note: Sl is the value obtained in Step 3. 

= (8) 

Step 10(a). For an E\lergy Efficiency Standard, compute the lower control limit (LCL2) for the 

mean of the combined first and second samples using the DOE energy efficiency standard (BES) 

as the desired mean and a one-tailed probability level of 97.5 percent (equivalent to the two-tailed 

probability level of 95 percent used in Step 5) as follows: 

= EES ts-Xz (9a) 

where the t-statistic has the value obtained in Step 5. 

Step 10(b). For an Energy Consumption Standard, compute the upper control limit (UCL2) for 

the mean of the combined first and second samples using the DOE energy pelionnance standard 

(EPS) as the desired mean and a one-tailed probability level of 102.5 percent (equivalent to the 

two-tailed probability level of 95 percent used in Step 5) as follows: 

= EPS + ts-Xz (9b) 

where the t-statistic has the value obtained in Step 5. 

Step 11 (a). For an Energy Efficiency Standard, compare the combined sample mean (i"z) to the 

lower control limit (LCLz) to find one of the follO\ving: 

(1) If the mean of the combined sample (x 2) is less than the lower control limit (LCL2) or 

95 percent of the applicable enerf,l)' efficiency standard (EES), whichever is greater, i.e., if 

X 2 < max (LCLz, 0.95 EES), the basic model is in noncompliance and testing is at an end. 

(2) If the mean of the combined sample (x 2) is equal to or greater than the lower control limit 

51 fILE Q:'data\ee-40lee-43143commonlnasseri'nistrep'nistrept.wpd 

October 6, J 998 (7:04PM) 
(LCL,) or 95 percent of the applicable energy efficiency standard (EES), whichever is greater: 

i.e., ifg2 2 max (LCL?, 0.95 EES), the basic model is in compliance and testing is at an end. 

Step 1 l(h). For an Energy Consumption Standard, compare the combined sainple mean (K) to 

the upper control Iinlit (UCL,) to find one of the followi~~g: 

(I) If the mean of the combined sample {x,) is greater than the upper- control limit (UCI,,) or 

105 percent of' the applicable energy performance standard (EPS), wl.~jchever is less, i e., if8, > 

min (Kt,, 1.05 E13S), the basic model is in noncompliai~ce and testing Is at an end. 

(2) If the mean of the combined sample (y2) is equal to or less than .the upper control limit (UCL,) 

or 105 percent of the'applicable energy perforn~ance standard (EPS). whichever is less, i.e. if F2 

- < min (UCI,,. 1 .a5 EPS), the basic model is in compliance and testing is at an end. 

Manufacturer-Option Testing 

If a determination of non-compliance is made in Steps 6, 7 or 11, the manufacturer may request 

that additional testing be conducted, in accordance with the following procedures. 

Step A. Tlle manufacturer requests that an additional number, m,, of units be tested, with ra5 

chosen such illat n,+n,+n, does not exceed 20 

Step B. Compute the mean energy performance, standard error, and lower or upper control limit 

of the new combined sample in accordance with the procedures prescribed in Steps 8, 9. and 10. 

above. 

Step C. Compare the mean perfo~mance of the new combined sample to the revised lower or 

upper control limit to determine one of the following: 

a. 1. For an Energy Eficierlcy Standard, if the new combined sample meall is equal to or greater 

than the lower control limit or 95 percent of the applicable energy efficiency standard, whichever 

is greater, the basic model is in compliance and testing is at an end. 

FILE Q:~ta\ee-40\ee-43\43comm~~strepinimept.wpd 

October 6,1998 (7:04PM) 

 EE-TP-98-101 COMMENT 08CC

(LCL2) or 95 percent of the applicable energy efficiency standard (BES), whichever is greater, 

i.e., ifx2 2: max (LCL2, 0.95 EES), the basic model is in compliance and testing is at an end. 

Step 11(b). For an Energy Consumption Standard, compare the combined sample mean (x 2) to 

the upper control limit (DCL2) to find one of the following: 

(1) If the mean of the combined sample (xz) is greater than the upper control limit (UCLJ or 

105 percent of the applicable energy performance standard (BPS), whichever is less, i.e., ifx2 > 

min (DeLz, 1.05 EPS), the basic model is in noncompliance and testing is at an end. 

(2) If the mean of the combined sample (x 2) is equal to or less than the upper control limit (UCLz) 

or 105 percent of the" applicable energy performance standard (EPS), whichever is less, i.e., if x 2 

~ min (DCLz, 1.05 EPS), the basic modeJ is in compliance and testing is at an end. 

Manufacturer -Opti on Testing 

If a determination of non-compliance is made in Steps 6, 7 or 11, the manufacturer may request 

that additional testing be conducted, in accordance with the fonowing procedures. 

Step A. The manufacturer requests that an additional number, 113, of units be tested, with Il3 

chosen such that n1+n2+n3 does not exceed 20. 

Step B. Compute the mean energy perfOImance, standard error, and lower or upper control1imit 

of the ne\v combined sample in accordance with the procedures prescribed in Steps 8, 9, and 10, 

above. 

Step C. Compare the mean perfOImance of the new combined sample to the revised lower or 

upper control limit to determine one of the following: 

a.I. For an Energy Efficiency Standard, if the new combined sample mean is equal to or greater 

than the lower control limit or 95 percent of the applicable energy efficiency standard, whichever 

is greater, the basic model is in compliance and testing is at an end. 

52 FILE Q:ldatalee-40Iee-43143connnonlnasseri\nistrep\nistreptwpd 

October 6. 1998 (7:04PM) 
a.2. For an Energy Consumption Standard, if the new combined sample mean is equal to or less 

than the upper con 11-01 Iirnit or 105 percent of the applicable energy consumption standard, 

whichever is less, the basic model is in con~pliance and testing is ar an end. 

b. 1 For an Energy EfXciency Standard, if the new combined sarnple mean is less than the tower 

control limit or 95 percent of the applicable energy efficiency standat-d. whichever, is geater, and 

the value of nr+n2+n, is less than 20, the manufacturer inay request that additional units be tested 

The total of all units tested may not exceed 20. Steps A, B. and C are then repeated. 

b.2. For an Eriergy Consuniption Standard. if the new combined sarnple mean is g~eater than the 

upper control limit or 105 percent of the applicable enerjg constimytion standard, whichever is 

less, and the value of n,+n,+n, is jess than 20, the man~Ifacturer may request that additional units 

be tested. The total of all units tested may not exceed 20. Steps A, B, and C are then repeated. b " 

c. Otherwise, the basic model is determined to be in noncompliance. 

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 EE-TP-98-101 COMMENT 08CC

a.2. For an Energy Consumption Standard, if the new combined sample mean is equal to or less 

than the upper control limit or 105 percent of the applicable energy consumption standard, 

whichever 1S less, the basic modells in compliance and testing is at an end. 

b.l. For an Energy Efllciency Standard, jf the ne\v combined sample mean is less than the lower 

control limit or 95 percent of the applicable energy efficiency standard, whichever, is greater, and 

the value of n1+n2+n3 is less than 20, the manufacturer may request that additional units be tested. 

The total of all units tested may not exceed 20. Steps A, B, and C are then repeated. 

b.2. For an Energy Consumption Standard, if the new combined sample mean is greater than the 

upper control limit or 105 percent of the applicable enerf,ry consumption standard, whichever is 

less, and the value ofn1+n2+n3 is less than 20, the manufacturer may request that additional units 

be tested. The total of all units tested may not exceed 20. Steps A, B, and C are then repeated . 

• 

c. Otherwise, the basic model is detemlined to be in noncompliance. 

53 FILE Q:'data\ee-40Iee.43143common'nasserilnistreplnistrept.wpd 

October 6, 1998 (7:04PM) 
Appendix C 

Commereiat Water Beater 'Test Procedures 

API'EYDIX F TO STWART IIB OF PART 431 - UNIFORM TEST METHOD FOR &IEASTJRI]L'C, THE 

1mRMAL EFFTCIENCY A&VD STA~XDBE- LOSS OF CO~RCI~~L WATER HEATERS Ahm HOT 

WATER SUPPLY BOILERS 

I. Scope: This appendix applies to the determination of thernlal efficiency and standby loss of 

storage water heate$, instantaneous water heaters and hot water s~~pply boilers as defined in this 

appertdix. 

2. Definitions 

2.1 Hot water supplv boiler means a boiler used to heat water for purposes other than space 

heating with an input rating of at least 300,000 Btu/h. 

2.2 irnstatttmtec~?~.~ water heater. means a water heater that has an input rating of at ieast 4000 Rtu 

per hour per gallon of stored water. Such term does not include gas instantaneous water heaters 

used to heat potable water with an input of 200,000 B~LI per hour or less, oil instantaneous water 

heaters used to heat potable water with an input of 210,000 Bm per hour or less, and electric 

instantaneous water heaters used to heat potable water with an input of 12 kilowatts or less unless 

such unit is designed to heat water to temperatures of 180°F or higher. 

2.3 R-value means the thermal resistance of insulating material as determined based on ASTM 

Standard Test Method C 177-85 or C5 18-91. 

2.4 Sta11dhj7 loss means the ratio of the heat loss per hour to the heat content of the stored water 

above room temperature, in percent per hour as determined by the fornula for S given in mSI 

231.10.3-1993. 0 

2.5 S'iurage wafer heater means a water heater that heats and stores water within the appliance at 

a thermostatically controlled temperature for delivery on demand. Such term does not include 

units with an input rating of4000 Btu per flour or more per gallon of stored water. Such tenn also 

does not include gas storage water heaters used to heat potal~le ~~ater with an input of 75,Ct00 Btu 

per hour or less, oil storage water heaters used to heat potable water with an input of 105,000 

Bhi per hour or less, and electric storage water heaters used to heat potable wdter with an input 

of 1 2 kilowatts or I ess. 

2.6 Tirnk surface area, for the purpose of determining portions of a tank requiring insulation, 

tank surface area means those areas of a storage tank, including access panels and hatches, in its 

uninsulated or preinsulated state that do not have pipe penetrations or tank supports attached. 

2.3 Ekermal <jf?cienc); means the ratio of the heat transferred to the water flowing through the 

water heater to the amount of energy consumed by the water heater as measured during the 

thermal efficiency test procedure presented in this appendix. 

3. Test Procedures 

FILE Q:idata\ee-40\ee-43\43comon~ri~sh~~ept..hpd 

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 EE-TP-98-101 COMMENT 08CC

Appendix C 

Commercial Water Heater Test Procedures 

ApPENDIX F To SUBPART B OF PART 431 - UNIFORM TEST METHOD FOR .MEASURING THE 

THERMAL EFFICIENCY AND STANDBY Loss OF COMMERCIAL WATER HEATERS Al'i""D HOT 

WATER SUPPLY BOILERS 

1. Scope: This appendix applies to the determination of thermal efficiency and standby loss of 

storage water heaters, instantaneous water heaters and hot water supply boilers as defined in this 

appendix. 

2. Definitions 

2.1 HOi water suppzv boiler means a boiler llsed to heat water for purposes other than space 

heati.ng with an input rating of at least 300,000 Btu/h. 

2.2 Instantalle01.lSwater healer means a water heater that has an input rating of at least 4000 Btu 

per hour per gallon of stored water. Such term does not include gas instantaneous water heaters 

used to heat potable water with an input of 200,000 Btu per hour or less, oil instantaneous water 

heaters used to heat potable water vv'ith an input of 210,000 Btu per hour or less, and electric 

instantaneous water heaters used to heat potable water with an input of 12 kilowatts or less unless 

such unit is designed to heat water to temperatures of 180°F or higher. 

2.3 R-value means the thermal resistance of insulating material as determined based on ASTh1 

Standard Test Method C177-85 or CS18-91. 

2.4 Standby loss means the ratio of the heat loss per hour to the heat content of the stored water 

above room temperature, in percent per hour as determined by the fonnula for S given in ANSI 

Z21.10.3-1993. 

.. 2.5 Storage 'water heater means a water heater that heats and stores water within the appliance at 

a thermostatically controlled temperature for delivery on demand. Such term does not include 

units v.~th an input rating of 4000 Btu per hour or more per gallon of stored water. Such terrn also 

does not include gas storage water heaters used to heat potable water with an input of 75,000 Btu 

per hour or less, oil storage water heaters used to heat potable water \vith an input of 105,000 

Btu per hour or less, and electric storage water heaters used to heat potable water with an input 

of 12 kilowatts or less. 

2.6 Tank surface area, for the purpose of detemlining portions of a tank requiring insulation, 

tank surface area means those areas of a storage tank, including access panels and hatches, in its 

uninsulated or preinsulated state that do not have pipe penetrations or tank supports attached. 

2.7 Thermal efficiency means the ratio of the heat transferred to the water flowing through the 

water heater to the amount of energy consumed by the water heater as measured during the 

thermal efficiency test procedure presented in this appendix. 

3. Test Procedures 

54 FILE Q:\data\ee-40\ee·43\43<oromon\nasseri\nistrep\nistrept.wpd 

October 6,1998 (7:04PM) 
3 

J. 1 Thermal Eficiency 

Measurement equipment specifications shall be as provided in the Instrumentation subsection of 

Appendix E to Subpart B of 10 CFR Part 430. 

3.1.2 Test Setzsp 

3. I .2.1 (7a.r-jieZed later heaters 

Test setup and ii~strun~entation shall conform to the subsection tided Method of Test of section 

2.8 in ANSI 221.10.3-1993. Hot water supply boilers shall be treated as instantaneous water 

heaters. 

3.1.2.2 OilTfileEed wafer heaters 

Test setup and instrumentation shafi conform to the subsection titled Method of Test of Section 

2.8 in ANSI 221. f 0.3-1993, except as noted. Hot water supply boilers shall be treated as 

instantaneous water heaters. When testing an oil-fueled water heater. a vertical length of flue pipe 

shall be connected to the flue gas outlet of sufficient height to establish the miniinurn draft 

specified in the manufacturer's installation instructions. The burner rate sfiall be adjusted to 

achieve an hourly Btrl input rate within +:'- 2% of the manufacturer's specified input rate with the 

CO, reading as specified by the manufacturer with srnoke no greater than 1 and fuel pump 

pressure within +/- of the manufacturer's specifications. 

3.1.2.3 1Tlectr.i~ water heaters 

The thernlal efficiency of electric water heaters with immersed heating dements is assurned to be 

98 percent. 

3 .1.3 Tesf ,+lethod 

Method of test shall conform to the subsection titled Method of Test of Section 2.5 in ANSI 

221.10.3-1993. 

3.2 Standby 120ss 

Measurement equipment specifications shall be as provided in the hstmmentation subsection of 

Appendix E to Subpart R of 10 CFR Part 430. 

3 22.1 GLIS-j~eled water he~rfers 

Test setup and instrumentation shall conforn~ to subsection titled Method of Test of Section 2.9 

in AXSI 221.10.3-1Q93, 

3.2.2.2 Oil-fieled w ~rfer heaters 

Test setup and instrumentation shall conform to Section 3.6 2.2 of this appendix. 

3 2.2.3 Electric water heaters 

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 EE-TP-98-101 COMMENT 08CC

3.1 Thermal Efficiency 

3 .1.1lv1easurement !jjquipment 

Measurement equipment specifications shall be as provided in the Instrumentation subsection of 

Appendix E to Subpart B of 10 CFR Pan 430. 

3.1.2 Test Setup 

3.1.2.1 Gas-fueled water heaters 

Test setup and instrumentation shall conform to the subsection titled Method of Test of section 

2.8 in ANSI Z21.lO.3-1993. Hot water supply boilers shall be treated as instantaneous \vater 

heaters. 

3.1.2.2 Oil-fueled water heaters 

Test setup and instrumentation shall conform to the subsection titled Method of Test of Section 

2.8 in ANSI Z21.10.3-1993, except as noted. Hot water supply boilers shall be treated as 

instantaneous water heaters. When testing an oil-fueled water heater, a vertical length of flue pipe 

shall be connected to the flue gas outlet of sufficient height to establish the minimum draft 

specified in the manufacturer's installation instructions. The burner rate shall be adjusted to 

achieve an hourly Btu input rate within +/- 2% of the manufacturer's specified input rate with the 

CO2 reading as specified by the manufacturer with smoke no greater than 1 and fuel pump 

pressure within +/- 1210 of the manufacturer's specifications. 

3.1.2.3 Electric water heaters 

The themlaJ efficiency of electric water heaters with immersed heating elementsis assumed to be 

98 percent. 

3.1.3 Test ,Method 

Method of test shall conform to the subsection titled Method of Test of Section 2.8 in ANSI 

Z21.10.3-1993. 

3.2 Standby Loss 

3.2.1 Aleasurement Equipment 

Measurement equipment specifications shall be as provided in the Instrumentation subsection of 

Appendix E to Subpart B of 10 CFR Part 430. 

3.2.2 Test Setup 

3.2.2.1 Gas-fueled water heaters 

Test setup and instrumentation shall confornl to subsection titled Method of Test of Section 2.9 

in ANSI Z21.10.3-1\/93. 

3.2.2.2 Oil-fUeled waler heaters 

Test setup and instrumentation shall conform to Section 3.1.2.2 of this appendix. 

3.2.2.3 Electric water heaters 

55 FILE Q:\data\ee-40Iee.43143<onnnonlnasserilnis1replnistreptwpd 

October 6,1998 (7:04PM) 
Test setup and instrumentation shall conform to the subsection titled Method of Test of Sectioi~ 

2.9 in ,LYSI 221.10.3-1993, except as noted below. When testing an electric water heater for 

standby loss. the electrical supply voltage shall be maintained \within -1.;- 1% of the center of the 

voltage range specified on the water heater nameplate. 

3.2.3 Test rkfethon' 

Method of testing sl.1~11 ~onfonn to the subsection titled Method o[ Test of Section 2.9 in ANSl 

221.10.3-1 993, except as noted. When testing electi-ic water heaters. the vaiue of E, required for 

calc~~lation of the standby loss (S) shall be 98 percent. 

FILE Q:Idatn\ee-40\ee-43\4Xomm\ndtnis&ep~m-ept.wpd 

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 EE-TP-98-101 COMMENT 08CC

Test setup and instrumentation shall conform to the subsection titled Method of Test of Section 

2.9 in Al""JSI 221.10.3-1993, except as noted below. When testing an electric water heater for 

standby loss, the electrical supply voltage shall be maintained v ... ithin +/- 1 % of the center of the 

voltage range specified on the water heater nameplate. 

3.2.3 Test A1ethod 

Method of testing shall Gonform to the subsection titled Method of Test of Section 2.9 in ANS] 

221.10.3-1993, except as noted. When testing electric water heaters, the value of Et required for 

calculation of the standby loss (S) shall be 98 percent. 

56 FILE Q:<latalee-lOlee.43143connnon'nasseri\nistrep\nistrept.wpd 

October 6,1998 (7:04PM) 
Appendix D 

tinfired Hot Water Storage Tank Test X~rocedures 

.APfEYDIX G TO SUBPART jB OF PART 431 - 'LTNTFORM TEST RfETHOD FOR DETERMINXNG THE 

 MAXIMUM HEAT LOSS OF COMMERCIAL UNFTIRED HOT WATER STOR~GE TA~WS 

I. Scope: This appendix applies to the determillation of the maximuin heat loss of comrnel-cial 

unfired hot water storage tanks. 

2.1 Rrominal tank surjfnce area means the area of the tank if it is uninsulated or the area of the 

jacket if it is a jacketed storage tank. This surface area will be determined by assunling that no 

holes or protrusions exist in or fiom the main body of the tank or jacket. 

2.2 R-valire means the thermal resistance of insulating material as determined based on ASTM 

Standard Test Method C 177-85 or C5 18-91. 

2.3 Tank ~w~:face area, for the purpose of determining portions of a tank requiring insulation, 

tank surface area mebs those areas of a storage tank, it~cluding access panels and hatches, in its 

uninsulated or preinsulated state that do not have pipe penetrations or tank supports attached 

during operation. For the purpose of calculating heat loss per square foot of tank surface area, the 

nominal tank surface area will be used. 

2.1 UnfireLZZtot water sforage tank- means a tank used to store water that is heated externally. 

3. Test Procedures 

'&is method can be used to determine the heat loss per square foot of tank surface area for 

ullfired hot water storage tanks by performing the standby loss test procedure on an electric 

storage water heater utilizing an identical tank with identical insulation and jacketing as that of the 

unfired storage tank rnodel. 

3.1.2 Test Eq?riprem 

3.1.3 Test Method 

Perfom1 the standby loss test procedure as provided in Appendix F to Subpart B of Part 43 1 0 

3.1.4 Calculntiu~a 

Determine the difference in internal energy of the volume of water in the tank at the begilltling and 

end of the test based on the mean tank temperature, QAfi in Btu as follows: 

where the terms on the right-hand-side of the equation are the same as those presented in Section 

57 FILE Q:Llata\ee-40\ee-43\4Xommatind\nishephmept.Wpd 

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 EE-TP-98-101 COMMENT 08CC

Appendix D 

Unfired Hot Water Storage Tank Test Procedures 

ApPENDIX G To SUBPART B OF PART 431 - UNIFORM TEST .METHOD FOR DETERMINING THE 

:MAXIMUM HEAT Loss OF COMMERCIAL UNFIRED HOT WATER STORAGE TANKS 

1. Scope: This appendix applies to the determination of the maximum heat loss of commercia! 

unfired hot water storage tanks. 

2. Definitions: 

2.1 Nominal tank surface area means the area of the tank if it is uninsulated or the area of the 

jacket if it isa jacketed storage tank. This surface area will be determined by assuming that no 

holes or protrusions exist in or from the main body of the tank or jacket 

2.2 R-value means the thermal resistance of insulating material as detenninedbased on ASTM 

Standard Test Method C 177-85 or C518-91. 

2.3 Tank sUl/ace area, for the purpose of determining portions of a tank requiring insulation, 

tank surface areame~ns those areas of a storage tank, including access panels and hatches, in its 

uninsu1ated or preinsulated state that do not have pipe penetrations or tank supports attached 

during operation. For the purpose of calculating heat loss per square foot of tank surface area, the 

nominal tank surface area will be used. 

2.4 U~fired hot water storage lank means a tank used to store water that is heated externally. 

3. Test Procedures 

3.1 Equivalent Electric /)'torage Tank A1ethod 

3.1.1 Scope 

This method can be used to determine the heat loss per square foot of tank surface area for 

unfired hot water storage tanks by performing the standby loss test procedure on an electric 

storage water heater utilizing an identical tank with identical insulation and jacketing as that of the 

unfi.red storage tank model. 

3.1.2 Test Equipment 

3.1.3 Test Method 

Perform the standby loss test procedure as provided in Appendix F to Subpart B of Part 431. 41> 

3.1. 4 Calculations 

Determine the difference in internal enerf,'Y of the volume of water in the tank at the beginning and 

end of the test based on the mean tank temperature, Q#J> in Btu as follows: 

QdifJ = K· ~ . 11 ~ 

where the terms on the right-hand-side of the equation are the san1e as those presented in Section 

57 FILE Q:ldata\ee-40lee-43\43conunon\nasserilnistreplnislIept.wpd 

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2.9 of ,ANSI 221.10.3-1993. 

Determine the rate of heat loss per square foot of tank surface area, Q,,,, in Btu/h.fiz as follours: 

where - o 

1 elecb-ical energy cor~sumption as presented in Section 2.9 of ANSI 22 1. I 0.3-1 993. 

A, = nominal surface area of the tank, ft2 (m", 

qt = C)SO/'o, the assumed recovery efficiency for electric water heaters with immersed heating 

elements, 

t = duration of standby loss test as defined in Section 2.9 of ANSI 221.10.3-1993. 

This method can be used to determine the heat loss per square foot of tank surface area. This is an 

alternate method to be used if the Equivalent Electric Storase Tank &fethod is not applicable. 

Measurement equipment specifications shall be as prosided in the Instrumentation subsection of 

Appendix E to Subpart £3 of 10 CFR Part 430. 

Measurement equipment shall be installed to measure electrical power and enerE cons~imption; 

internal tank storageotemperature. ambient temperature and storage volrln~e of the unfired storage 

tank as indicated in Appendix E to Subpart I3 of 10 CFR Part 430. 

Connect a u7ater heaterjs) of a type recommended by the storage tank n~anufacturer, with a 

known thermal et'ficiency rating and storage tank capacity as determined by Appendix F to 

Subpart B of CFR 43 1, to the storage tank according to the manufacturers instructions provide a 

recirculation loop between the water heater and storage tank and a pump to provide circulation. 

The circulation loop between the water heater and storage tank shall be of minimum len,&. 

Insulate all piping connected to the storage tank with a material hating a rhennal resistance (Rvalue) of not less than 4 "F.ft2.hr/lBtu (0.7 ~.m%%'). 

AMaintain ambient air temperature according to ANSI 22 I. 10.3- 1993 Section 2.8.i 

3.2.4 lest :Vfcthod 

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 EE-TP-98-101 COMMENT 08CC

2.9 of ANSI Z21.1 0.3-1993. 

Determine the rate of heat loss per square foot of tank surface area, Qlosp in Btu/h·fe as follows: 

where 

l~'c 

As 

T'lt 

= 

= 

electIical energy consumption as presented in Section 2.9 of ANSI Z21.lO.3-1993, 

nominal surface area of the tank, ft2 (m2), 

98%, the assumed recovery efficiency for electric water heaters with immersed heating 

elements, 

duration of standby loss test as defined in Section 2.9 of ANSI Z21.10.3-1993. 

3.2 Exlernal~y Heated WClter !viethod 

t = 

3.2.1 Scope 

This method can be used to determine the heat loss per square foot of tank surface area. This is an 

alternate method to be used if the Equivalent Electric Storage Tank :Method is not applicable. 

3.2.2. Aleasurement Equipment 

Measurement equipment specifications shall be as provided in the Instrumentation subsection of 

Appendix E to Subpart B of 10 CFR Part 430. 

Measurement equipment shall be installed to measure electrical power and enerbTJ' consumption, 

internal tankstorag~temperature, ambient temperature and storage volume of the unfired storage 

tank as indicated in Appendix E to Subpart B of 10 CFR Part 430. 

3.2.3 Test Setup 

Connect a water heater(s) of a type recommended by the storage tank manufacturer, with a 

known thermal efficiency rating and storage tank capacity as detennined by Appendix F to 

Subpart B of CFR 431, to the storage tank according to the manufacturers instructions provide a 

recirculation loop between the water heater and storage tank and a pump to provide circulation. 

The circulation loop between the water heater and storage tank shall be of minimum length. 

Insulate all piping connected to the storage tank with a material having a thermal resistance (Rvalue) of not less than 4 cF'fe-hr/Btu (0.7 K-m2

/\V). 

Maintain ambient air temperature according to ANSI Z21.1 0.3-1993 Section 2.8.i. 

3.2.4 Test Alethod 

58 FILE Q:\data\ee-40\ee-43\43commonlnasseri'nistrep'nistrept.wpd 

October 6, 1998 (7:04PM) 
Deternline capacity of unfired storage tank according to Section 2.30 of ANSI 

221.10.3-1993. 

Establish a maximum mean unfired storage tank tenlperature of 160 = 5 "F 

* Record ebect-c and he1 measurement instmment readings, tank temperatures and 

time. 

* Do not add heat to the unfired storage tank for the next 48 hours. 

After the 48 hour standby period has elapsed: 

--- Record the electric and &el measurement readings 

- Record the tank temperatures and time 

- Activate the water heater 

* Recovery - Establish a mean tank temperature of 160 :l: 55"F while circulating water 

between the water heater and the urlfired storage tank 

- Record the electric and fuel measureinent readings 

- Record tank temperatures and time 

Data required: -0- 

t'T,-@,, Volume of fuel consumed during recovery period 

(JF Correction factor for fuel 

H Heating value of fuel 

* T,.,, Mean tank temperature at beginning of the standby perid 

* Tkqf Mean tank temperature at the end of the recovery period 

* qL Thermal etrjciency of the hot water heater 

ts Standby loss period in hours 

V Storage capacity of unfired storage tank 

QPp, Heat loss rate of water from recirculation loop 

(optional - calcrrlated based on water temperature in pipe, pipe diinensions, and 

insril ation) 

Calculate the amount of energy required to heat the water during the recovery period, Q, as 

follo~~s: 

For gas, 

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Octoba 6,1998 (7:04PM) 

 EE-TP-98-101 COMMENT 08CC

• Detemline capacity ofuntlred storage tank according to Section 2.30 of ANSI 

Z21.10.3-1993. 

• Establish a maximum mean unfired storage tank temperature of 160 ± 5 oF. 

• Record electIjc and fuel measurement instrument readings, tank temperatures and 

time. 

• Do not add heat to the unfired storage tank for the next 48 hours. 

• After the 48 hour standby period has elapsed: 

... Record the electric and fuel measurement readings 

- Record the tank temperatures and time 

Activate the water heater 

• Recovery - Establish a mean tank temperature of 160 :r: 50 F while circulating water 

between the water heater and the unfired storage tank 

Record the electric and fuel measurement readings 

Record tank temperatures and time 

3.2.5 Calculations 

Data required: 

• 

• 

• 

• 

• 

• 

• 

• 

• 

• }~.fod Volume of fuel consumed during recovery period 

CF Correction factor for fuel 

H 

TS .. 11li 

T R_mf 

'Il! 

Is 

v~ 

Qpipe 

Heating value of fuel 

Mean tank temperature at beginning of the standby period 

Mean tank temperature at the end of the recovery period 

Thermal efficiency of the hot water heater 

Standby loss period in hours 

Storage capacity of unfired storage tank 

Heat loss rate of water from recirculation loop 

(optional - calculated based on water temperature in pipe, pipe dimensions, and 

insulation) 

Calculate the amount of energy required to heat the water during the recovery period, QR as 

follows: 

For gas, 

59 FILE Q:\data\ee-40\ee.43\43comroon'nasserilnistrep\nistrept.wpd 

October 6, 1998 (7:04PM) 
Determine the difference in internal energy of the ~~olume of water in the unfired storage tank 

at the beginning of the test standby toss period aid at the end of the recovery period based on 

the mean tank temperature, Qd@ in Btu as follows: 

Calculate the rate of heat loss per square foot of tank surface area during the test standby loss 

period, q,,,, based on the mount of heat required to reheat the water during the recovery 

period. 

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 EE-TP-98-101 COMMENT 08CC

QR = VRJuel' CF· H 

Detemline the difference in internal energy of the volume of water in the unfired storage tank 

at the beginning of the test standby loss period and at the end of the recovery period based on 

the mean tank temperature, Qdi/f in Btu as foHows: 

Calculate the rate of heat loss per square foot of tank surface area during the test standby loss 

period, qloss' based on the amount of heat required to reheat the water during the recovery 

period. 

q/oss = 

60 FILE Q:ldata\ee.40Iee·43143commonlnasseri'nistrep'nistrept.wpd 

October 6, 1998 (7:04PM) 
Appendix E 

Comnlercid "13ackaged" Boilers Test lDrocedures 

0 

APPENDIX E TO SUBPART B OF PART 4.31--UWFORMI TEST 8IETFxOD FOR MEAS~I:;RING Tm 

EAwxy EFFICIENCY OF PACKAGED CO~RCUL HEATING BOILERS 

1.0 Scope 

1 1 This Appendix covers the test procedures used to measure the steady state combustion 

efficiency of gas-fired or oil-fired, packaged commercial heating boilers having a rated capacity of 

300,000 Bna per hour or more. 

1.2 Packaged boiler covered by this Appendix is defined as "a boiler that is shipped complete 

with heating equipment, mechanical draft eyuiprnent, and aittomatic contrds; usually shipped in 

one or more sections". 

1.2.1 Packaged low-pressure steam and hot water boilers shall conform to the requirements of 

the current edition of the ASME Boiler and Pressure Vessel Code, Section IV, Heating Boilers. 

1 2.2 Packaged high-pressure steam and high temperature water boilers shall conform to the 

requirements of the ASME Boiler and Pressure Vessel Code, Section L. Power Boilers. 

2.0 Definitions 0 

2.1 Definitions include the definitions specified in section 3.0 of the B-Tydronics institute Testing 

and Rating Standard for Heating Boilers, sixth edition, June 1989, and the tbllox7ing additional 

definitions for condensing boilers: 

2.1.1 Condensing Boiler - a boiler which will, during the laboratory test, condense part of the 

water vapor in the flue gases and which is equipped with a means of collecting and draining this 

condensate. 

2.1.2 Flue Condensate - liquid formed by the condensation of moisture in the flue gases. 

3.0 Test Procedures 

3.1 Test Procedure for Packaged Low-Pressure Steam and Hot Water Boilers 

3.1.1 Cfassificatio~ls: 'T'he classificatioi~ of boilers shal I be as specified in sectioi~ 4.0 of the 1989 

Hydronics Institute Testing and Heating Standard for Heating Boilers 

3.1.2 Requirements: The requirements for the combustion efficieilcy test shall be conducted as 

' specifiedinsections5.1.2,5.2,5.4.1,5.4.3,5.4.4,5.4.5,and5.4.6ofthe19S9Hydronics 

institute Testing and Heating Standard for Heating Boilers. 

3.1.3 Instnln~ents apd Apparatus: The requirements for instruments and apparatus shall. be as 

specified in sections 6 and 7 of the 1989 Hydronics Institute Testing and Heating Standard for 

Heating Boilers. 

6 1 FILE Q:Llata\ee-40\ee-43\43common~k~trep~mept.wpd 

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 EE-TP-98-101 COMMENT 08CC

AppeudixE 

Commercial "I'ackaged" Boilers Test ]>rocedures 

ApPEl'o'DIX E TO SUBPART B OF PART 431--UNIFORM TEST lVIETHOD FOR MEASURING THE 

ENERGY EFFICIENCY OFPACK.,.'\.GED COMMERCIAL HEATING BOILERS 

1.0 Scope 

1.1 This Appendix covers the test procedures used to measure the steady state combustion 

efficiency of gas-fired or oil-fired, packaged commercial heating boilers having a rated capacity of 

300,000 Btu per hour or more. 

1.2 Packaged boiler covered by this Appendix is defined as "a boiler that is shipped complete 

with heating equipment, mechanical draft equipment, and automatic controls; usually shipped in 

one or more sections". 

1.2.1 Packaged low-pressure steam and hot water boilers shall conform to the requirements of 

the current edition of the AS:ME Boiler and Pressure Vessel Code, Section IV, Heating Boilers. 

1.2.2 Packaged high-pressure steam and high temperature water boilers shall conform to the 

requirements of the ASME Boiler and Pressure Vessel Code, Section 1, Pmver Boilers. 

2.0 Definitions 

2.1 Definitions include the definitions specified in section 3.0 of the Hydronics Institute Testing 

and Rating Standard for Heating Boilers, sixth edition, June 1989, and the following additional 

definitions for condensing boilers: 

2.1.1 Condensing B.oiler - a boiler which will, during the laboratory test, condense part of the 

water vapor in the flue gases and which is equipped with a means of collecting and draining this 

condensate. 

2.1.2 Flue Condensate - liquid formed by the condensation of moisture in the flue gases. 

3.0 Test Procedures 

3.1 Test Procedure for Packaged Low-Pressure Steam and Hot Water Boilers. 

3.1.1 Classit1cations: The classification of boilers shall be as specified in section 4.0 of the 1989 

Hydronics Institute Testing and Heating Standard for Heating Boilers 

3.1.2 Requirements: The requirements for the combustion efficiency test shall be conducte.d as 

specified in sections 5.1.2, 5.2, 5.4.1, 5.4.3, 5.4.4, 5.4.5, and 5.4.6 of the 1989 Hydronics 

Institute Testing and Heating Standard for Heating Boilers. 

3.1.3 Instmments alld Apparatus: The requirements for instruments and apparatus shall be as 

specified in sections 6 and 7 of the 1989 Hydronics Institute Testing and Heating Standard for 

Heating Boilers. 

61 FILE Q:ldatalee-40Iee-43143comrnonlnasserilnistreplnistrept.wpd 

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3. I .4 Test Conditions: Tlie test conditions shalt be as specified in section 8.0 of the 1989 

Hydronics Znstimte Testing and Heating Standard for Heating Boilers with the exception of 

subsection 8.5.1 (of the E-XI standard) which is rep1 aced with the follo.rving paragraph: 

3.1.4.1 Water Temperatures - for water- test, the boiler inlet temperature shall be at 80F i1OF 

and the boiler outlet tenlperature shall be at 180Fk2F. 

3.1.5 Test Procedure: 

3.1.5.1 The test procedure for the combustion efficiency test ~11311 be as specified in sections 9.2 

and 10.2 of the 1989 Hydronics institute Testing and Heating Standard for Heating Boilers. 

3.1.5.2 Optional Procedure for the Measuremenl of Condensate for a Condensing Boiler. The 

test procedure for the nleasureinent of the condensate from the flue gas under steady state 

operation shalt be conducted as specified in section 9.2 of ASEIRAE standard 103-1993 under the 

rated input conditions. This condensate measurement; if selected to be conducted, shall be for an 

additional 30 minutes of steady state operation after the completion of tbe steady state 

combustion efficiency test specified in sec. 2.6.1 of this appendix. 9 

3.1.5.3 Steam and Water Boilers. A steam and water boiler shall be tested as steam boiler. 

Optionally, the xiater version of a steam and water boiler may be tested as a water boiler. 

3.1.6 Calculatioi~ of Results: 

3.1.6.1 Combustion Efficiency. The calculation j;rocedure for the combustion efficiency test 

shall be as specified in section 11.2 of the 1989 Hydronics Institute Testing and Heating Standard 

for Heating Boilers. 

3.1.6.2 Procedure for the Calculation of the z4dditional Heat Gain and Heat loss, and Adjustment 

to the Con~bustion Efficiency for a Condensing Boiler 

3.1.6 2.1 If the optional procedure for the measurement of flue condensate of sec 3.6 2 of this 

Appendix is selected, the calculation of the latent heat gain from the condensation of the water 

vapor in the tlue gas and heat loss of due to the flue condensate down the drain shall be as 

specified in section 11.3 7.1 and 11.3.7.2 of AS- Standard 103-1993. 

3.1.6.2.2 Adjustment to the Combustion Efficiency for Condensing Boiler. The combustion 

efficiency as calculated in section 3.7.1 of this Appendix shall be adjusted by adding the fatent 

gain from the condensation of the water vapor in the flue gas and subtracting the heat loss (due to 

the flue condensate down the drain) to obtain the combustion efxciency of a cor~derlsir~g boiler 0 

FILE Q:Lkta\ee-10\ee-43\4komm~\nistrepkstrept.~ 

Dctobe~ 6,1998 (704PM) 

 EE-TP-98-101 COMMENT 08CC

3.1.4 Test Conditions: The test conditions shall be as specified in section 8.0 of the 1989 

Hydronics Institute Testing and Heating Standard for Heating Boilers \vith the exception of 

subsection 8.5.1 (of the Hl standard) which is replaced with the following paragraph: 

3.1.4.1 Water Temperatures - for water test, the boiler inlet temperature shall be at 80F :1: 1 OF 

and the boiler outlet temperature shall be at 180F±2F. 

3.1.5 Test Procedure: 

3.1.5.1 The test procedure for the combustion efficiency test shall be as specified in sections 9.2 

and 10.2 of the 1989 Hydronics Institute Testing and Heating Standard for Heating Boilers. 

3.1.5.2 Optional Procedure for the Measurement of Condensate for a Condensing Boiler. The 

test procedure for the measurement of the condensate from the flue gas under steady state 

operation shall be conducted as specified in section 9.2 of ASHRAE standard 103-1993 under the 

rated input conditions. This condensate measurement, if selected to be conducted, shaH be for an 

additional 30 minutes of steady state operation after the completion of the steady state 

combustion efficiency test specified in sec. 2.6.1 ofth1s appendix . 

.. 3.1.5.3 Stearn and Water Boilers. A steam and water boiler shall be tested as steam boiler. 

Optionally, the water version of a stearn and ,vater boiler may be tested as a water boiler. 

3.1.6 Calculati on of Results: 

3.1.6.1 Combustion Efficiency. The calculation procedure for the combustion efficiency test 

shall be as specified in section 11.2 of the 1989 Hydronics Institute Testing and Heating Standard 

for Heating Boilers. 

3.1.6.2 Procedure for the Calculation of the Additional Heat Gain and Heat loss, and Adjustment 

to the Combustion Efficiency for a Condensing Boiler 

3.1.6.2.1 If the optional procedure for the measurement of flue condensate of sec. 2.6.2 of this 

Appendix is selected, the calculation of the latent heat gain from the condensation of the water 

vapor in the nue gas and heat loss of due to the flue condensate down the drain shall be as 

specified in section 11.3.7.1 and 11.3.7.2 of ASHRAE Standard 103-1993. 

3.1.6.22 Adjustment to the Combustion Efficiency for Condensing Boiler. The combustion 

efficiency as calculated in section 2.7.1 of this Appendix shall be adjusted by adding the latent 

gain from the condensation of the water vapor in the flue gas and subtracting the heat loss (due to 

the flue condensate dmvn the drain) to obtain the combustion efficiency of a condensing boiler. ~ 

62 FILE Q:ldata\ee-40\ee-43\43connnon\nasserilnistreplnistreptwpd 

October 6. 1998 (7:04PM) 
Appendix F 

Commercial Furnace Test IDrrocedures 

APPENDIX TO SIBPART HZ OF PART 431: UNIFORM TEST PROC1EDILrRE FOR TWE 

h1EASI;;REMENT OF ENERGY EFFICIENCY OF COMMERCIAL WJ~RM AIR E%JIGWACES 

1.0 Scope: o 

1. I This appendix covers the test procedures used for the measuring of the steady state thermal 

efficiency of commercial warn air gas fired central fitrnaces and commercial warin air oil fired 

central furnaces with capacity of 225,000 Btrrffi or more. 

1.2 For purpose of this Appendix, the measured thermal efficiency is eqid to f 100 - percent flue 

loss). 

2.0 Definitions 

2.1 Gas Fired Central Furnaces. Definition ternls for gas fired central firrnaces shall be as specified 

in PART 13 - DEFINITIONS, of the American National Standards Institute (AkVSI) Standard 

ANSI 221.17-1993. 

2.2 Oil Fired Central Furnaces. Definition terms for oil fired central furnaces shall be 8s specified 

in section 3 - Glossary, of the Underwriters I,aboratories, Tnc. Standard for Oil-Fired Central 

Furnaces, IJL 727- 1994. 

3.0 Test Procedures 

3 I Gas Fired Central Furnaces The test setup, flue requirement, instr~jrnentation, test 

condition, and measurement for measuring the thermal efticiency of gas fired central furnaces 

with rated input of 35,000 BtuAl or more, shall be as specified in sections 2.1 through 2.11, 

section 2.37 (Them~al Efficiency), and section 4.2 of the American National Standards Institute 

(ANSI) Standard ibr Gas-Fired Central Ftirnaces. ANSI 21.47-1 993. 

3.2 Oil Fired Central Furnaces. The test setup, ilue requirement, instrumentation, test 

condition, and measurement for measuring the thernlal efficiency of oil fired central hl-naces with 

rated input of 225,000 Bm!% or more, shall be as specified in sections 3 1 through 4 1, section 42 

(Combustion Test - Burner and Furnace), and section 47 (Temperature Tests), of the 

Underwriters Laboratoxi es Standard for Oil-Fired Central Furxaces, UL, 727- 1994. 

3.2.1 Measurement of Flue CO, (Carbon Dioxide). In addition to the flue temperature 

measurement as specjiied in section 40 6 8 of LE, 727, one or two sampling tubes shall be located 

within six inches downstream from the flue temperature probe (as indicated on Figure 30.3 of IJL 

727). If an open end tube is used, it shall project into the flue one-third of the chimney connector 

diameter. If other methods of sampling are used, the sampling tube shall he placed so as to obtain 

an average sample. There shalt be no air leak between the temperature probe and the sarnpfing 

tube location. 'The flue gas sample shall be collected at the same time the flue gas temperamre is 

recorded. The CO, concentration of the flue gas shall be as specified by the manufacturer with a 

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Appendix F 

Commercial Furnace Test Procedures 

APPENDIX D TO SUBPART B OF PART 431: UNIFORM TEST PROCEDURE FOR THE 

MEASl}REMENT OF ENERGY EFFICIENCY OF COMJ\1ERCIAL WARM AJRFuR1"JACES 

1.0 Scope: 

1.1 This appendix covers the test procedures used for the measU1ing of the steady state thermal 

efficiency of commercial warm air gas tired central furnaces and commercial warm air oil fired 

central furnaces with capacity of 225,000 Btu/h or more. 

1.2 For purpose of this Appendix, the measured thermal efficiency is equal to (100 - percent flue 

loss). 

2.0 Definitions 

2.1 Gas Fired Central Furnaces. Definition ternlS for gas fired central furnaces shall be as specified 

in PART XI - DEFINITIONS, of the American National Standards Institute (.t\..i"JSI) Standard 

ANSI Z21.47-1993. 

2.2 Oil Fired Central Furnaces. Definition terms for oil fired central furnaces shall be as specified 

in section 3 ~ Glossary, of the Underwriters Laboratories, Inc. Standard for Oil-Fired Central 

Furnaces, UL 727-1994. 

3.0 Test Procedures 

3.1 Gas Fired Central Furnaces. The test setup, flue requirement, instrumentation, test 

condition, and measurement for measuring the thermal efticiency of gas fired central furnaces 

with rated input of 2~5,000 Btu/h or more, shall be as specified in sections 2.1 through 2.11, 

section 2.37 (Thernlal Efficiency), and section 4.2 of the .American National Standards Institute 

(ANSI) Standard for Gas-Fired Central Furnaces, ANSI 21.47-1993. 

3.2 Oil Fired Central Furnaces. The test setup, tlue requirement, instrumentation, test 

condition, and measurement for measuring the thermal efficiency of oil fired central furnaces with 

rated input of 225,000 Btu/h or more, shall be as specified in sections 31 through 41, section 42 

(Combustion Test - Burner and Furnace), and section 47 (Temperature Tests), of the 

Undenvriters Laboratories Standard for Oil-Fired Central Furnac.es, UL 727-1994. 

3.2.1 Measurement of Flue CO2 (Carbon Dioxide). In addition to the flue temperature 

measurement as spec.ified in section 40.6.8 oflJL 727, one or two sampling tubes shall be located 

within six inches downstream from the flue temperature probe (as indicated on Figure 40.3 ofUL 

727). If an open end tube is used, it shall project into the flue one-third of the chimney c.onnector 

dianleter. If other methods of sampling are used, the sampling tube shall be placed so as to obtain 

an average sample. There shall be no air leak between the temperatme probe and th.e sampling 

tube location. The flue gas sample shall be collected at the same time the flue gas temperature is 

recorded. The CO2 concentration of the flue gas shall be as specified by the manufacturer with a 

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tolerance of *O. 1%. The flue CO, shall be determined with an instrument providing a reading 

with an error no greater than *0.1%. 4 " 

3.3 Optional Procedure for the Measurement of Condensate for a Gas-Fired Condensing 

Furnace. The lest procedure for the measurement of the condensate from the the gas under 

steady state operation shall be conducted as specified in section 9.2 of ASHRAE stmdard 

103-1993 under the rated input conditions. This condensate measurenieiit, if selected to be 

conducted, shall be for an additional 30 minutes of steady state operation after the completion of 

the steady state combustion effr ciency test specified in sec 2.1 of this appendix. 

3.4 Calculation 

3.4.1 Gas Fired Central Furnaces. The calculation procedure shall be as specified in section 

2.37, Tf~ermal Efficiency, of ANSI 22 1.47-1 993. 

3.4.2 Oil Fired Central Furnaces. The caiilculation procedure for the percent flue loss and the 

steady state efficiency shall follow the procedure specified in section 11.2 (Cornbustion Eficiency 

Test) of the 1989 Hydronics Institute (H.1) Testing and Heating Standard for Heating Boilers. 

The thermal efficiency shall be calculated as: 

Thermal Efficiency = 100 percent - percent flue loss. 

3.4.3 Procedure for the Calculation of the Additional Heat Gain and Heat loss, and Adjustment 

to the Cornbustion Efficiency for a Condensing Furnace. 4 

3.4.3.1 If the optional procedure for the measurement of flue condensate of sec. 2.3 of this 

Appendix is selected, the calculation of the latent heat gain from the condensation of the water 

vapor in the flue gas and heat loss of dus to the flue condensate down the drain shall be as 

specified in section 11.3.7 1 and 11.3.7.2 of ASmE Stai~dard 183-1993. 

3.4.3.2 Adjustment to the comb us ti or^ Eficiency for Condensing Furnace. The combustion 

efficiency as calculated in sec. 3.1 of this Appendix shall be adjusted by adding the latent gain 

from the condensation of the water vapor in the flue gas and subtracting the heat loss (due to the 

flue condensate down the drain) to obtain the con~bustion efficiency of a condensing &mace. 

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tolerance of ±0.1 %. The flue CO2 shall be determined with an instrument providing a reading 

vv'ith an error no greater than ±O.l ~O. 

. . 

3.3 Optional Procedure for the Measurement of Condensate for a Gas-Fired Condensing 

Furnace. The test procedure for the measurement of the condensate from the t1ue gas under 

steady state operation shall be conducted as specified in section 9.2 of ASHRAE standard 

103-1993 under the rated input conditions. This condensate measurement, if selected to be 

conducted, shall be for an additional 30 minutes of steady state operation after the completion of 

the steady state combustion efficiency test specified in sec. 2.1 ofthis appendix. 

3.4 Calculation. 

3.4.1 Gas Fired Central Furnaces. The calculation procedure shall be as specified in section 

2.37, Thermal Efficiency, of ANSI Z21.47-1993. 

3.4.2 Oil Fired Central Furnaces. The calculation procedure for the percent Hue loss and the 

steady state efficiency shall follow the procedure specified in section 11.2 (Combustion Efficiency 

Test) of the 1989 Hydronics Institute (H.I) Testing and Heating Standard for Heating Boilers. 

The thermal efficiency shall be calculated as: 

Thermal Efficiency = 100 percent - percent flue loss. 

3.4.3 Procedure for the Calculation of the Additional Heat Gain and Heat loss, and Adjustment 

to the Combustion Efficiency for a Condensing Furnace . 

• 

3.4.3.1 If the optional procedure for the measurement of flue condensate of sec. 2.3 of this 

Appendix is selected, the calculation of the latent heat gain from the condensation of the water 

vapor in the flue gas and heat loss of due to the flue condensate down the drain shall be as 

specified in section 11.3.7.1 and 11.3.7.2 of ASHRAE Standard 103-1993. 

3.4.3.2 Adjustment to the Combustion Efficiency for Condensing Furnace. The combustion 

efficiency as calculated in sec. 3.1 of this Appendix shall be adjusted by adding the latent gain 

from the condensation of the water vapor in the flue gas and subtracting the heat loss (due to the 

flue condensate down the drain) to obtain the combustion efficiency of a condensing furnace. 

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Appendix F 

Commercial Air Conditioners and Heat Pumps 'Test Procedures 

APPEiVoIX C TO S'ETRPART BOF BART 431- U;WFORM TEST METHOD FOR MEASLX'XNG THE 

 el^^^^ EFFICIENCY OF EL Ah'D LARGE CO~RCIAL 1'ACKAGE .4IR COWITIO%TNG 

AW HEATING EQUIPMENT, PACKAGE TER~AL AIR CONDITIONERS .L!D HEAT Pu,~s. 

I. Scope: This appendix applies to the determination of energy eaciency of small and large 

commercial pac.kage air conditioning and heating equipment, package terminal air conditioners 

ax~d heat pumps as defined in this appendix. 

2.0 Definitions 9 

2.1 "ARI" means Air-Conditioning and Refrigeration Institute. 

2.2 "ARI Standard 210/240-94" means the test standard published in 1994 by the AIRI and titled 

"Unitary -Air-Conditioning and Air-Source Heat Pump Equipment." 

2.3 ",W Standard 3 10/380-93" means the test standard published in 1993 by the ARI and titled 

"Standard for Package Tenninal Air-Conditioners and Heat Pumps. " 

2.4 "ARI Standard 320-93" means the test standard published in 1993 by the .MU and titled 

"Water-source Heat Pumps. " 

2.5 "ARI Standard 3401360-93" means the test standard published in 1993 by the ARE and titled 

"Commercial and Industrial Unitary Air-Coi~ditioning and Air-Source Heat Pump Equipment." 

3.0 Test Procedures 

3.1 Testing Required and Test Conditions 

3.1.1 Testing required and test conditions for small commercial package air conditioning and 

headng equipment. 

3.1 .I .1 Air-cooled small commercial package unitary central air conditioners and air-conditioning 

heat pumps rated below 65 kBtu/h cooling capacity. The required tests and tests conditions are 

those specified in ARI Standard 210!'240-94 for obtaining the Seasonal Energy Esciency Ratio 

(SEER) and Heating Seasonal Performance Factor (HSPF) defined in this Akl standard. 

3.1.1.2 Air-cooled small conlmercial package unitary central air conditioners and air-conditioning 

heat primps rated at or above 65 kBtu/h and below 130 kBtrlih cooling capacity. In the cooling 

mode. the required tests and tests conditions are those specified in ART Standard 21 01'240-94 for 

obtaining the Energy Efficiency Ratio (EER) at the standard cooling rating conditions with 95 "F 

dry bulb entering air. III the heating mode for heat pumps, the required tests and tests conditions 

are those specified in BRI Standard 210240-94 for obtaining the Coefficient of Performance 

(COP) at the standard heating rating point with 47 OF; dr~~ bulb entering air 

3.1 .1.3 Water-cooled. evaporatjvely cooled and water-source sn~al t commercjtd air conditioners 

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Appendix F 

Commercial Air Conditioners and Heat Pumps Test Procedures 

ApPENDIX C TO SUBPAUT B OF PART 431- liNIFORM TEST METHOD FOR MEASlJ'1UNG THE 

ENERGY EFFICIENCY OF Sl\lALL Al'I1) LARGE CO"MMERCIAL ]> ACKAGE AIR CONDITIOl'HNG 

A.,."'ID HEATING EQUIPMENT, PACKAGE TERlVIINAL AIR CONDITIONERS Al"iD HEAT PUMPS. 

1. Scope: This appendix applies to the determination of energy efficiency of small and large 

commercial package air conditioning and heating equipment, package terminal air conditioners 

and heat pumps as defined in this appendix. 

2.0 Definitions .. 2.1 "ARl" means Air-Conditioning and Refrigeration Institute. 

2.2 "ARl Standard 210/240-94" means the test standard published in 1994 by the ARI and titled 

"Unitary Air-Conditioning and Air-Source Heat Pump Equipment." 

2.3 "ARI Standard 310/380-93" means the test standard published in 1993 by the AID and titled 

"Standard for Package Tenninal Air-Conditioners and Heat Pumps. II 

2.4 "ARl Standard 320-93" means the test standard published in 1993 by the ARI and titled 

"Water-source Heat Pumps. 1\ 

2.5 "ARI Standard 340/360-93" means the test standard published in 1993 by the ARI and titled 

"Commercial and Industrial Unitary Air-Conditioning and Air-Source Heat Pump Equipment." 

3.0 Test Procedures 

3.1 .Testing Required and Test Conditions 

3.1.1 Testing required and test conditions for small commercial package air conditioning and 

heating equipment. 

3.1.1.1 Air-cooled small commercial package unitary central air conditioners and air-conditioning 

heat pumps rated be)(}w.65 kBtu/h cooling capacity. The required tests and tests conditions are 

those specified in ARI Standard 210/240-94 for obtaining the Seasonal Energy Efficiency Ratio 

(SEER) and Heating Seasonal Performance Factor (HSPF) defined in this AID standard. 

3.1.1.2 Air-cooled small commercial package unitary central air conditioners and air-conditioning 

heat pumps rated at or above 65 kBtulh and below 130 kBtu/h cooling capacity. In the cooling 

mode, the required tests and tests conditions are those specified in ART Standard 210/240-94 for 

obtaining the Energy Efficiency Ratio (EER) at the standard cooling rating conditions with 95 OF 

dry bulb entering air. In the heating mode for heat pumps, the required tests and tests conditions 

are those specified in ARI Standard 210/240-94 for obtaining the Coefficient of Performance 

(COP) at the standard heating rating point 'with 47 OF dry bulb entering air. 

3.1.1.3 Water-cooled, evaporatively cooled and water-source smaH commercial air conditioners 

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,,~ 
and air-conditioning heat pumps. In the cooling mode, the required tests and test conditions are 

those specified in ARI Standard 210/240-94 for obtaining the Energy Eficiency Ratio (EER) at 

the standard cooling rating conditions tvith 95 OF dry bulb entering air for evaporatively cooled 

equipment and with 85 OF entering water temperature for water-cooled and water-source 

equipment. In the lleating mode for the water-source heat pumps, the required tests and tests 

conditions are those specified in ARI Standard 3263-93 for obtaining the Coefficient of 

Performance (COP) at the standard heating rating point with 70 entering water temperature. 0 

3.1.2 Testing required and test conditions for large commercial package air conditioning and 

heating equipment. 

3.1.2.1 Laxge commercial air-cooled air conditioners and air-conditioning heat pumps. In the 

cooling mode, the required tests and tests conditio~~s are tliose specified in ARI Standard 

340!360-93 for obtaining the Energy Efficiency Ratio (EER) at the standard coding rating 

conditions with 95 "F dry bulb entering air. In the heating mode for heat pumps, the required 

tests and tests conditions are those specified in ARI Standard 310!360-93 for obtaining the 

CoeEcier~t of Performance (COP) at the standard high temperature heating rating conditions with 

47 "F dry bulb entering air. 

3.1.3.2 Large commercial evaporatively cooled and water-cooled air conditioners and 

air-conditioning heat pumps. The required tests and tests conditions are those specified in ,4RI 

Standard 340/'360-93 for obtaining the Energy Eficiency Ratio (EER) at the standard cooling 

rating conditions with 95 "F dry bulb entering air for evaporatively cooled equipment and with 85 

OF entering water temperature for water-cooled systems. 

3.1.3 Package terminal air conditioner and package termillaf heat pumps. In the cooling mode, 

the required tests and tests conditions are those specified in ART Standard 3 101'380-93 for 

obtaining the Energy Efficiency Ratio (EER) at the standard cooling rating conditions with 95 "F 

dry bulb entering air? In the heating mode for heat pumps, the required tests and tests conditions 

are those specified in ARL Standard 3 15/380-93 for obtaining the Coefficient of Performance 

(COP) at the standard high-temperature heating rating conditions with 47 "F dry bulb entering air, 

3.2 Testing procedures 

3 .2. I. Testing procedures for small co~nmercial package air conditioning and heating equipment. 

3.2.1.1 Air-cooled small con~mercial package unitary central air conditioners and air-conditioning 

heat pumps rated below 65 kBtuih cooling capacity. The required tests shdl be performed 

according to ARI Standard 2 10!240-94. 

3.2.1 .S Air-cooled small conlmercial package unitary central air co~zditioners and air-conditioning 

heat pumps rated at or above 65 kBtu/fi and belour 130 kBtu/h cooling capacity. The required 

tests shall be performed according to ARI Standard 210/240-94. 

3.2.1.3 Water-cooled, evaporatively cooled and tvater-source small commercial air conditioners 

and air-conditioning heat pumps. In the cooling mode, the required tests shall be pelformed 

according to ARI Standard 210:'240-94. In the heating mode for water-source heat pumps, the 

required tests shall be performed according to ARI Standard 330-93. 

3.2.2 Testing procedures for Large coinmercial package air conditioning and heating equipment 

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and air-conditioning heat pumps. In the cooling mode, the required tests and test conditions are 

those specified in ARI Standard 210/240-94 for obtaining the Energy Efficiency Ratio (EER) at 

the standard cooling rating conditions with 95 of dty bulb entering air for evaporative1y cooled 

equipment and with 85 of entering water temperature for water-cooled and water-source 

equipment. In the heating mode for the water-source heat pumps, the required tests and tests 

conditions are those specified in ARI Standard 320-93 for obtaining the Coefficient of 

PerfOImance (COP) at the standard heating rating point with 70 of entering water temperature. ~ 

3.1.2 Testing required and test conditions for large commercial package air conditioning and 

heating equipment. 

3.1.2.1 Large commercial air-cooled air conditioners and air-conditioning heat pumps. ]n the 

cooling mode, the required tests and tests conditions are those specitied in ARt Standard 

340/360-93 for obtaining the Energy Efficiency Ratio (EER) at the standard cooling rating 

conditions with 95 of dry bulb entering air. In the heating mode for heat pumps, the required 

tests and tests conditions are those specified in ARI Stan.dard 340/360-93 for obtaining the 

Coefficient ofPerfonnance (COP) at the standard high temperature heating rating conditions with 

47°F dry bulb entering air. 

3.1.2.2 Large commercial evaporatively cooled and water-cooled air conditioners and 

air-conditioning heat pumps. The required tests and tests conditions are those specified in ARI 

Standard 340/360-93 for obtaining the Energy Efficiency Ratio (EER) at the standard cooling 

rating conditions with 95 OF dry bulb entering air for evaporatively cooled equipment and with 85 

OF entering water temperature for water-cooled systems. 

3.1.3 Package terminal air conditioner and package tenninal heat pumps. In the cooling mode, 

the required tests and tests conditions are those specified in ARI Standard 310/380-93 for 

obtaining the Energy Efficiency Ratio (EER) at the standard cooling rating conditions with 95 OF 

dry bulb entering air~ In the heating mode for heat pumps, the required tests and tests conditions 

are those specified in ARL Standard 310/380-93 for obtaining the Coefficient ofPerfonnance 

(COP) at the standard high-temperature heating rating conditions with 47 OF dry bulb entering air. 

3.2 Testing procedures 

3.2.1 Testing procedures for small commercial package air conditioning and heating equipment. 

3.2.1.1 Air-cooled small commercial package unitary central air conditioners and air-conditioning 

heat pumps rated below 65 kBtuih cooling capacity. The required tests shall be perfonned 

according to ARI Standard 210/240-94. 

3.2.1.2 Air-cooled small commercial package unitary central air conditioners and air-conditioning 

heat pumps rated at or above 65 kBtulh and below 130 kBtulh cooling capacity. The required 

tests shall be performed according to ARI Standard 210/240-94. 

3.2.1.3 Water-cooled, evaporative]y cooled and water-source small commercial air conditioners 

and air-conditioning heat pumps. In the cooling mode, the required tests shall be pelformed 

according to ARI Standard 210/240-94. In the heating mode for water-source heat pumps, the 

required tests shall be perfonned according to ARI Standard 320-93. 

3.2.2 Testing procedures for large commercial package air conditioning and heating equipment 

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3.2.2.1 Large commercial air-cooled air conditioners and air-conditioning heat pumps. The 

required tests shall be performed according Standard 340,/360-93. 

3.2.2.3 Large conlrnercial evaporatively cooled and water-cooled air conciitioners and 

air-conditioning heat pumps. The required tests shall be pertbnned according ARI: Standard 

3401360-93. 

3.2.3 Testing procedures tbr package terminal air conditioner and package terminal heat pumps. 

The required tests shall be performed according to ARI Standard 3 101380-93. 

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3.2.2.1 Large commercial air-cooled air conditioners and air-conditioning heat pumps. The 

required tests shall be performed according ARI Standard 340/360-93. 

3.2.2.2 Large commercial evaporatively cooled and water-cooled air conditioners and 

air-conditioning heat pumps. The required tests shall be pertonned according ARI Standard 

340/360-93. 

3.2.3 Testing procedures for package terminal air conditioner and package terminal heat pumps. 

The required tests shall be performed according to ARI Standard 310/380-93. 

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