Archived List of Cleaner Hydronic Heaters

Phase 1 models are no longer considered "qualified" under the Program after March 31, 2010. Use of permanent labels and hang tags for these models must be discontinued on units manufactured after that date.

Below are 3 lists of cleaner burning hydronic heaters that qualified for the EPA voluntary program. The first table is for models that qualified for the Phase 1 orange tag for "year round" use (about 70 percent cleaner than unqualified models). Please note that although the tag is calculated for year round use, some jurisdictions may not allow "year round" use (i.e., not during summer for just hot water rather than heat). The second table is for models that qualified for the Phase 1 orange tag for "heating season use only." These emissions are calculated as if the model is only used during the heating season. Please note that some jurisdictions do not allow models that only qualify for "heating season use only" because their emissions would be greater if they are used year round. 

The third table is archived Phase 2 models that are no longer manufactured, the expiration date has expired, or no longer meet the current emissions level.

TABLE 1

Phase 1 Orange Tag "Year Round" Models

Manufacturer Model
Name &
Number		 Heat
Output
Rating (1)		 Annual
Average
Emission
Rate		 Heat
Input (2)
Annual
Average
Emission
Level		 Heat
Output
Annual
Average
Emission
Level		 Highest
Individual
Test Run
Pro-Fab Industries Inc.
 		 Empyre
Pro
Series
200		 66,290
BTU/hr

8.40 grams/hr

0.18 grams/hr/
10,000 BTU
heat output

 0.182
lbs/million BTU
heat input

0.27
lbs/million BTU
heat output

 18.023
grams/hr
Central Boiler E -
Classic
2300		 160,001
BTU/hr

6.4 grams/hr

0.06 grams/hr/
10,000 BTU
heat output

 0.20
lbs/million BTU
heat input

0.31
lbs/million BTU
heat output

 17.60
grams/hr
Piney
Manufacturing
Limited
(Portage and Main)
 		 Optimizer
250		 44,519
BTU/hr

5.33 grams/hr

0.18 grams/hr/
10,000 BTU
heat output

 0.199
lbs/million BTU
heat input

0.35
lbs/million BTU
heat output

 8.31
grams/hr
Sequoyah Paradise
 		 E3300B 109,528
BTU/hr

8.1 grams/hr

0.13 grams/hr/
10,000 BTU
heat output

 0.28
lbs/million BTU
heat input

0.56
lbs/million BTU
heat output

 19.1
grams/hr
Central Boiler E -
Classic
1200		 89,613
BTU/hr

7.5 grams/hr

0.15 grams/hr/
10,000 BTU
heat output

 0.33
lbs/million BTU
heat input

0.59
lbs/million BTU
heat output

 19.94
grams/hr
Wood Doctor Converter 87,858
BTU/hr

20.3 grams/hr

0.33 grams/hr/
10,000 BTU
heat output

 0.30
lbs/million BTU
heat input

0.66
lbs/million BTU
heat output

 41.5
grams/hr
Heatmor 400 SSR 157,784
BTU/hr

31.3 grams/hr

0.29 grams/hr/
10,000 BTU
heat output

 0.41
lbs/million BTU
heat input

0.68
lbs/million BTU
heat output

 47.6
grams/hr
Heatmor 200 SSR 71,923
BTU/hr

20.3 grams/hr

0.42 grams/hr/
10,000 BTU
heat output

 0.35
lbs/million BTU
heat input

0.76
lbs/million BTU
heat output

 33.4
grams/hr
Bioheat Resources
 		 BH500
Eco
Energy		 73,067
BTU/hr

19.07 grams/hr

0.323 grams/hr/
10,000 BTU
heat output

 0.402
lbs/million BTU
heat input

0.77
lbs/million BTU
heat output

 71.602
grams/hr
Hardy KB175 66,681
BTU/hr

16.3 grams/hr

0.31 grams/hr/
10,000 BTU
heat output

 0.54
lbs/million BTU
heat input

0.87
lbs/million BTU
heat output

 42.7
grams/hr
Greenwood Technologies (3) 100 18,248 BTU/hr

15.205 grams/hr

1.090 grams/hr/
10,000 BTU
heat output

 0.564
lbs/million BTU
heat input

2.046
lbs/million BTU
heat output

 17.80 grams/hr
Sequoyah Paradise
 		 E3400 101,020
BTU/hr

21.88 grams/hr

0.42 grams/hr/
10,000 BTU
heat output

 0.488
lbs/million BTU
heat input

2.37
lbs/million BTU
heat output

 34.77
grams/hr

1 - Based on 8-hour test for stick wood models and 4-hour test for continuous feed models.
2 - EPA Phase 1 level is 0.60 lbs/million BTU.  Emission levels are annual averages unless qualified for heating season use only.
3 - These data are via the "cordwood exception," i.e., according to the ASTM cordwood method in lieu of EPA Method 28 OWHH.

 

TABLE 2

Phase 1 Orange Tag "Heating Season Only" Models

Manufacturer Model
Name &
Number		 Heat
Output
Rating (1)		 Heating
Season
Average
Emission
Rate		 Heat
Input (2)
Heating
Season
Average
Emission
Level		 Heat
Output
Heating
Season
Average
Emission
Level		 Highest
Individual
Test Run
Pro-Fab Industries Inc. Empyre
Pro
Series
200		 66,290
BTU/hr

11.58 grams/hr

0.25 grams/hr/
10,000 BTU
heat output

 0.186
lbs/million BTU
heat input

0.28
lbs/million BTU
heat output

 18.023
grams/hr
Piney
Manufacturing Limited
(Portage and Main)
 		 Optimizer
250		 44,519
BTU/hr

6.59 grams/hr

0.21 grams/hr/
10,000 BTU
heat output

 0.201
lbs/million BTU
heat input

0.32
lbs/million BTU
heat output

 8.31
grams/hr
Central Boiler E -
Classic
2300		 160,001
BTU/hr

8.6 grams/hr

0.08 grams/hr/
10,000 BTU
heat output

 0.21
lbs/million BTU
heat input

0.32
lbs/million BTU
heat output

 17.60
grams/hr

Sequoyah Paradise
 

 E3300B 109,528
BTU/hr

8.5 grams/hr

0.13 grams/hr/
10,000 BTU
heat output

 0.20
lbs/million BTU
heat input

0.39
lbs/million BTU
heat output

 19.1
grams/hr
Central Boiler E -
Classic
1200		 89,613
BTU/hr

9.1 grams/hr

0.17 grams/hr/
10,000 BTU
heat output

 0.31
lbs/million BTU
heat input

0.51
lbs/million BTU
heat output

 19.94
grams/hr
Wood Doctor Converter 87,858
BTU/hr

26.8 grams/hr

0.43 grams/hr/
10,000 BTU
heat output

 0.30
lbs/million BTU
heat input

0.65
lbs/million BTU
heat output

 41.5
grams/hr
Alternative Fuel Boilers EBW150 27,441
BTU/hr

14.14 grams/hr

0.576 grams/hr/
10,000 BTU
heat output

 0.434
lbs/million BTU
heat input

0.80
lbs/million BTU
heat output

 24.05
grams/hr
Bioheat Resources
 		 BH500
Eco
Energy		 73,067
BTU/hr

28.54 grams/hr

0.478 grams/hr/
10,000 BTU
heat output

 0.479
lbs/million BTU
heat input

0.90
lbs/million BTU
heat output

 71.602
grams/hr
Aqua-Therm Omega
100		 63,807
BTU/hr

23.80 grams/hr

0.515 grams/hr/
10,000 BTU
heat output

 0.551
lbs/million BTU
heat input

1.17
lbs/million BTU
heat output

 26.988
grams/hr
Greenwood Technologies (3) 100 18,248 BTU/hr

13.643 grams/hr

0.863 grams/hr/
10,000 BTU
heat output

 0.418
lbs/million BTU
heat input

1.362
lbs/million BTU
heat output

 17.80 grams/hr
Sequoyah Paradise
 		 E3400 101,020
BTU/hr

20.10 grams/hr

0.31 grams/hr/
10,000 BTU
heat output

 0.37
lbs/million BTU
heat input

1.48
lbs/million BTU
heat output

 34.77
grams/hr

1 - Based on 8-hour test for stick wood models and 4-hour test for continuous feed models.
2 - EPA Phase 1 level is 0.60 lbs/million BTU.  Emission levels are annual averages unless qualified for heating season use only.
3 - These data are via the "cordwood exception," i.e., according to the ASTM cordwood method in lieu of EPA Method 28 OWHH.

 

TABLE 3

Phase 2 Archived Models

Manufacturer

Model

Fuel Type

Maximum Heat Output Rating (BTU/hr)

8-hour Output
Rating (BTU/hr)

Annual Average Efficiency (% HHV)

Annual Avg Emission Rate (grams/hr)

Annual Avg Emission Level (lbs/million BTU)

Aqua-Therm

Kunzel
PK-10

wood pellets;
continuous feed

45506

NA

0.7

0.21

Aqua-Therm

Kunzel
PK-20

wood pellets;
continuous feed

85969

NA

1.2

0.13

Central Boiler

E - Classic
1400

stick wood;
batch load

209316

107459

NA

5.5

0.27

Central Boiler

E - Classic
2300

stick wood;
batch load

172343

160001

NA

6.4

0.31

Central Boiler

E-Classic
2400

stick wood;
batch load

260486

186453

NA

3.3

0.12

Central Boiler

Maxim
M250

wood pellets;
continuous feed

212453

NA

1.6

0.06

Hardy

KBP 270

wood pellets;
continuous feed

120000

NA

2.96

0.20

Heatmor

200 SSR II

stick wood;
batch load

204934

66842

NA

3.7

0.18

HeatSource1

Earth
Energy
Series
190

stick wood;
batch load

189093

87577

NA

3.56

0.19

Northland Dist. & Mfg Inc.

Pristine Series 1000

stick wood;
batch load

82968

48721

NA

2.5

0.24

Northwest Manufacturing, Inc. (Woodmaster)

AFS 900

wood pellets;
continuous feed

107069

NA

2.49

0.24

Pro-Fab Industries

Empyre
Pro
Series
200

stick wood;
batch load

219278

66290

NA

8.4

0.27

Pro-Fab Industries

Empyre
Pro
Series
400

stick wood;
batch load

209119

177333

NA

6.1

0.31

Wood Doctor

WD-
HE8000

stick wood;
batch load

248411

112655

NA

6.1

0.26

Burn Wise

Contact Us about the Burn Wise Program
Contact Us to ask a question, provide feedback, or report a problem.
Last updated on March 19, 2025