7-D-i

APPENDIX 7-D. REDUCED SET OF BOILER MODELS AND CHARACTERISTICS

TABLE OF CONTENTS

7-D.1 INTRODUCTION ................................................................................................ 7-D-1

7-D.2 REDUCED SET OF BOILER MODELS DATABASE ...................................... 7-D-1

7-D.2.1 Purpose.................................................................................................................. 7-D-1

7-D.3 REDUCED BOILER MODEL CHARACTERISTICS........................................ 7-D-4

7-D.3.1 Boiler Input Capacity by Product Class................................................................ 7-D-5

7-D.3.2 Boiler AFUE by Product Class............................................................................. 7-D-7

LIST OF TABLES

Table 7-D.2.1 Boiler Manufacturers...........................................................................7-D-2

Table 7-D.2.2 Boiler Model Count in Reduced Set by Product Class........................7-D-4

LIST OF FIGURES

Figure 7-D.3.1 Number of Gas-Fired Hot Water Boiler Models by Input Capacity....7-D-5

Figure 7-D.3.2 Number of Gas-Fired Steam Boiler Models by Input Capacity ..........7-D-5

Figure 7-D.3.3 Number of Oil-Fired Hot Water Boiler Models by Input Capacity.....7-D-6

Figure 7-D.3.4 Number of Oil-Fired Steam Boiler Models by Input Capacity............7-D-6

Figure 7-D.3.5 Number of Gas-Fired Hot Water Boiler Models by AFUE.................7-D-7

Figure 7-D.3.6 Number of Gas-Fired Steam Boiler Models by AFUE........................7-D-7

Figure 7-D.3.7 Number of Oil-Fired Hot Water Boiler Models by AFUE..................7-D-8

Figure 7-D.3.8 Number of Oil-Fired Steam Boiler Models by AFUE.........................7-D-8
7-D-1

APPENDIX 7-D. REDUCED SET OF BOILER MODELS AND CHARACTERISTICS

7-D.1 INTRODUCTION

This appendix presents the approach for developing a reduced set of boiler models and 

the resulting boiler characteristics.

7-D.2 REDUCED SET OF BOILER MODELS DATABASE

7-D.2.1 Purpose 

The reduced set of boiler models was developed to identify actual unique boiler models 

which represent units with different design characteristics. This reduced data set was then 

expanded by adding information provided in the manufacturers' product literature.

The September 2013 Air-Conditioning, Heating, and Refrigeration Institute (AHRI) 

Directory1 provided the basis for the reduced set of models, since it is frequently updated and 

includes useful data for each model. Not all boiler manufacturers are part of AHRI, however, so 

DOE also looked at other model directories, including the California Energy Commission 

(CEC),

2 Energy Star,3 and Natural Resources Canada (NRCAN).4

The September 2013 AHRI Directory1 lists more than 2652 boiler models. The set of 

boiler models was then expanded with data from CEC (5464 models), Energy Star (940 models 

and groups of models), and NRCAN (1475 models). Many models represent essentially identical 

units that differ only in brand name. The database of gas hot water boiler models described here 

(referred to as the reduced set of boiler models or simply the reduced set) represents nonrepetitive boiler models only. After examining the AHRI Directory database, the Department 

determined that about 1331 models (654 hot water gas boilers, 83 steam gas boilers, 501 hot 

water oil boilers, and 93 steam oil boilers) may be considered sufficiently different to be listed 

as unique models. See the LCC spreadsheet (“Models Directory” worksheet) for a complete 

listing of models used for each boiler product class.

Once the reduced set was identified, DOE examined the manufacturer’s product literature 

and added additional data. DOE identified the main boiler manufacturers, shown in Table 7-

D.2.1, and the trade names of their boiler lines. Table 7-D.2.2 shows the parent companies and 

number of models by product class in the reduced data set.
7-D-2

Table 7-D.2.1 Boiler Manufacturers

Parent Company Brand Name (Distributor) AHRI CEC Energy 

Star

NRCAN

A.O. Smith Corporation Lochinvar Corporation Yes Yes Yes Yes

ACV Manufacturing Triangle Tube Yes Yes Yes Yes

Axeman-Anderson Company Axeman-Anderson Yes Yes Yes No

BDR Thermea Baxi No Yes Yes Yes

Biasi Group Biasi (Quincy Hydronic Technology) No No Yes Yes

Bosch Group Bosch Yes Yes Yes Yes

Buderus Yes Yes Yes Yes

Bradford White Corporation Bradford White Corporation Yes Yes Yes No

Laars Heating Systems Yes Yes Yes Yes

Burnham Holdings Burnham Commercial Yes Yes Yes Yes

Crown Boiler Company Yes Yes Yes Yes

New Yorker Boiler Company Yes Yes Yes Yes

PurePro Advantage (F.W. Webb 

Company)

Yes No No No

U.S. Boiler Company Yes Yes Yes No

Camus Hydronics Ltd. Camus Hydronics Yes Yes Yes Yes

Clean Burn Inc. Clean Burn No No Yes No

Conematic Heating Systems Inc. Conematic Heating Systems No No Yes Yes

De Dietrich Thermique Group De Dietrich Boilers Yes Yes Yes Yes

Dennison Holdings Ltd. NY Thermal Inc. (NTI) Yes Yes Yes Yes

Eco Heating Systems BV Hamilton Engineering No Yes Yes Yes

Propak (Huron Valley Sales) No Yes No Yes

ECR International Bryant Yes No Yes No

Carrier Yes Yes Yes Yes

Dunkirk Boilers Yes Yes Yes No

Kenmore (Sears) Yes Yes Yes No

Lennox Yes Yes Yes Yes

Olsen Division Yes No Yes Yes

Pennco Yes Yes Yes No

Ultimate Engineering No Yes Yes No

Utica Boilers Yes Yes Yes No

Energy Kinetics Energy Kinetics No No Yes No

E-Z-Rect Manufaturing Ltd. Allied Engineering Company No No Yes Yes

Firebird Heating Solutions Firebird (Quincy Hydronic 

Technology)

No No Yes No

Granby Industries PNA, Inc. / Pensotti Yes No Yes Yes

Heat Transfer Products, Inc. HTP Yes Yes Yes Yes

IBC Technologies, Inc. IBC Technologies Yes Yes Yes Yes

Kyung Dong Navien Co., Ltd. Navien No Yes Yes Yes

Mestek, Inc. Embassy Industries Yes Yes Yes No

Hydrotherm Yes Yes Yes Yes

RBI Water Heater Yes Yes Yes No

Smith Cast Iron Boilers Yes Yes Yes No

Spacepak Yes Yes Yes No
7-D-3

Monitor Products, Inc. Monitor Products No No Yes No

Newmac Manufacturing Newmac Manufacturing No Yes Yes Yes

Noritz Corporation Noritz America Corporation No Yes No No

Paloma Industries Raypak Yes Yes Yes Yes

Propak (Huron Valley Sales) No Yes No Yes

PB Heat, LLC. National HVAC Manufacturing 

Company, LLC

Yes No No No

Peerless Boilers Yes Yes Yes Yes

Quietside Corporation Quietside No Yes Yes No

Rinnai Corporation Rinnai Yes Yes Yes Yes

Sime SIME North America (Thermal 

Hydronic Supply Ltd.)

Yes Yes Yes Yes

Slant/Fin Corporation Slant/Fin Yes Yes Yes Yes

SPX Corporation Weil-McLain Yes Yes Yes Yes

Williamson-Thermoflo Yes Yes Yes No

TDC Manufacturing, Inc. Boyertown Furnace Company Yes Yes Yes No

Columbia Boiler Company of 

Pottstown

No Yes Yes No

PurePro Trio Boiler (F.W. Webb 

Company)

Yes Yes Yes No

Thermo-Dynamics Boiler Company No Yes Yes No

EFM No No Yes No

Toyotomi Co., Ltd. Toyotomi No No Yes No

Viessmann Group Viessmann Yes Yes Yes Yes
7-D-4

Table 7-D.2.2 Boiler Model Count in Reduced Set by Product Class

Parent Company HWGB SGB HWOB SOB

A.O. Smith 30 0 0 0

ACV Manufacturing 12 0 0 0

Axeman-Anderson Company 2 0 18 0

BDR Thermea 9 0 0 0

Biasi Group 20 0 12 0

Bosch Group 29 0 13 0

Bradford White Corporation 22 0 0 0

Burnham Holdings 106 30 88 34

Camus Hydronics Ltd. 40 0 0 0

Clean Burn Inc. 0 0 1 0

Conematic Heating Systems Inc. 3 0 0 0

De Dietrich Thermique Group 0 0 7 0

Dennison Holdings Ltd. 23 0 17 0

Eco Heating Systems BV 20 0 0 0

ECR International 42 16 52 14

Energy Kinetics, Inc. 13 0 15 0

E-Z-Rect Manufacturing Ltd. 10 0 0 0

Firebird Heating Solutions 0 0 8 0

Granby Industries 12 0 6 0

Heat Transfer Products, Inc. 16 0 0 0

IBC Technologies, Inc. 5 0 0 0

Kyung Dong Navien Co., Ltd. 3 0 0 0

Mestek, Inc. 10 0 8 12

Monitor Products, Inc. 0 0 2 0

Newmac Manufacturing, Inc. 0 0 46 0

Noritz Corporation 4 0 0 0

Paloma Group 23 0 0 0

PB Heat, LLC. 39 7 23 12

Quietside Corporation 3 0 0 0

Rinnai Corporation 9 0 0 0

Sime 4 0 0 0

Slant/Fin Corporation 57 14 77 12

SPX Corporation 64 16 44 9

TDC Manufacturing, Inc. 5 0 56 0

Toyotomi Co., Ltd. 0 0 1 0

Viessmann Group 19 0 7 0

Total 654 83 501 93

7-D.3 REDUCED BOILER MODEL CHARACTERISTICS

Input capacity and AFUE distributions for boilers are an essential component in the LCC 

analysis. Figure 7-D.3.1 to Figure 7-D.3.4 show the input capacity distribution for each boiler 

product class. Figure 7-D.3.5 to Figure 7-D.3.8 show the AFUE distribution for each boiler 

product class.
7-D-5

7-D.3.1 Boiler Input Capacity by Product Class

Figure 7-D.3.1 Number of Gas-Fired Hot Water Boiler Models by 

Input Capacity

Figure 7-D.3.2 Number of Gas-Fired Steam Boiler Models by Input 

Capacity

0%

1%

2%

3%

4%

5%

6%

7%

8%

9%

30 50 70 90 110 130 150 170 190 210 230 250 270 290

Fraction of Units

Input Capacity (kBtu/h)

0%

1%

2%

3%

4%

5%

6%

7%

8%

9%

60 80 100 120 140 160 180 200 220 240 260 280 300

Fraction of Units

Input Capacity (kBtu/h)
7-D-6

Figure 7-D.3.3 Number of Oil-Fired Hot Water Boiler Models by 

Input Capacity

Figure 7-D.3.4 Number of Oil-Fired Steam Boiler Models by Input 

Capacity

0%

2%

4%

6%

8%

10%

12%

14%

16%

8090

100110120130140150160170180190200210220230240250260270280290300

Fraction of Units

Input Capacity (kBtu/h)

0%

2%

4%

6%

8%

10%

12%

90

100110120130140150160170180190200210220230240250260270280290300

Fraction of Units

Input Capacity (kBtu/h)
7-D-7

7-D.3.2 Boiler AFUE by Product Class

Figure 7-D.3.5 Number of Gas-Fired Hot Water Boiler Models by 

AFUE

Figure 7-D.3.6 Number of Gas-Fired Steam Boiler Models by 

AFUE

0%

5%

10%

15%

20%

25%

82 83 84 85 86 87 88 89 90 91 92 93 94 95 96

Fraction of Units

AFUE

0%

10%

20%

30%

40%

50%

60%

70%

80 81 82 83

Fraction of Units

AFUE
7-D-8

Figure 7-D.3.7 Number of Oil-Fired Hot Water Boiler Models by 

AFUE

Figure 7-D.3.8 Number of Oil-Fired Steam Boiler Models by AFUE

0%

5%

10%

15%

20%

25%

30%

35%

84 85 86 87 88 89 90 91 92 93

Fraction of Units

AFUE

0%

5%

10%

15%

20%

25%

30%

35%

82 83 84 85 86

Fraction of Units

AFUE
7-D-9

REFERENCES

1. Air Conditioning Heating and Refrigeration Institute, Consumer's Directory of Certified 

Efficiency Ratings for Heating and Water Heating Equipment (AHRI Directory 

September 2013), 2013. (Posted September 2013) (Last accessed September, 2013.) 

<http://www.ahridirectory.org/ahridirectory/pages/home.aspx>

2. California Energy Commission, California Energy Commission Appliance Efficiency 

Database, 2013. (Last accessed September, 2013.) 

<http://www.appliances.energy.ca.gov/Default.aspx>

3. Environmental Protection Agency, Energy Star Certified Boiler Directory, 2013. (Last

accessed September, 2013.) <http://www.energystar.gov/>

4. Natural Resources Canada, Compare Product Models' Energy Efficiency, 2013. (Last

accessed September, 2013.) <http://oee.nrcan.gc.ca/pmllmp/index.cfm?action=app.welcome-bienvenue>