Jump to main content or area navigation.

Contact Us

Burn Wise

Partners -
Program Participation -
List of Cleaner Hydronic Heaters

 Burn Wise Logo
Learn Before You Burn Video Contest   Subscribe to BurnWise    

Breathe Easier with Cleaner Outdoor Wood-Fired Heaters (PDF) (1pg, 451k, About PDF)

Below is the Phase 2 list of cleaner burning hydronic heaters that qualify for EPA's Hydronic Heater program*. Phase 2 units have a white tag and are about 90 percent cleaner than unqualified units. EPA's 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. You can find Phase 1 archived here.

* The wood-burning appliances that are "qualified" under the EPA's Voluntary Hydronic Heater and Fireplace Programs are not "certified" per EPA's Wood Heater New Source Performance Standard. Contact your state or local air quality agency for clarification on the type of wood-burning appliances, if any, that may legally be installed in your area

Please Note Energy efficiency numbers that have been calculated using the current test procedure are generating numbers that do not represent actual efficiencies. As such, we have taken down the efficiency column from this web site. Please bear with us while we review this issue.

Phase 2 Qualified White Tag Models*
Manufacturer Model Name & Number Heat Output Rating (1)
(BTU/hr) 		Annual Average Emission Rate
(grams/hr)		 Heat Output (2)Annual Average Emission Level
(lbs/million BTU output)		 Fuel Type
Northwest Manufacturing, Inc. (Woodmaster)
Exit EPA Disclaimer		 Flex-Fuel
30 KW
indoor/
outdoor		 117022 1.5 0.04 stick wood;
batch load
Northwest Manufacturing, Inc. (Woodmaster)
Exit EPA Disclaimer		 Flex-Fuel
30 KW
indoor/
outdoor		 110167 1.3 0.04 wood pellets;
continuous feed
Northwest Manufacturing, Inc. (Woodmaster)
Exit EPA Disclaimer		 Flex-Fuel
60 KW
indoor/
outdoor		 219831 2.6 0.04 stick wood;
batch load
Central Boiler
Exit EPA Disclaimer		 Maxim
M250		 212453 1.6 0.06 wood pellets;
continuous feed
Heatmor
Exit EPA Disclaimer		 200 SSP 162793 1.1 0.07 wood pellets; continuous feed
Polar Furnace
Exit EPA Disclaimer		 G3 142533 1.96 0.08 stick wood;
batch load
Central Boiler
Exit EPA Disclaimer		 E-Classic
3200		 261506 3.3 0.08 stick wood;
batch load
Central Boiler
Exit EPA Disclaimer		 E-Classic
2400		 186453 3.3 0.12 stick wood;
batch load
Aqua-Therm
Exit EPA Disclaimer		 Kunzel
PK-20		 85969 1.2 0.13 wood pellets;
continuous feed
Hawken Energy
Exit EPA Disclaimer		 GX-10 76887 2.2 0.14 stick wood;
batch load
LEI Products
Exit EPA Disclaimer		 MBB-100 91300 1.99 0.15 wood pellets;
continuous feed
Northwest Manufacturing, Inc. (Woodmaster)
Exit EPA Disclaimer		 Flex-Fuel
60 KW
indoor/
outdoor		 179458 2.3 0.16 wood pellets;
continuous feed
Central Boiler
Exit EPA Disclaimer		 E-Classic 1450 120529 4.7 0.18 stick wood;
batch load
Heatmor
Exit EPA Disclaimer		 200 SSR II 66842 3.7 0.18 stick wood;
batch load
Mahoning Outdoor Furnace, Inc.
Exit EPA Disclaimer 		Sky Series V 82594 2.44 0.18 stick wood;
batch load
HeatSource1
Exit EPA Disclaimer		 Earth
Energy
Series
190		 87577 3.56 0.19 stick wood;
batch load
Polar Furnace
Exit EPA Disclaimer		 G2 66897 3.53 0.19 stick wood;
batch load
Hardy Manufacturing
Company
Exit EPA Disclaimer		 KBP
270		 120000 2.96 0.20 wood pellets;
continuous feed
Aqua-Therm
Exit EPA Disclaimer		 Kunzel
PK-10		 45506 0.7 0.21 wood pellets;
continuous feed
Nature's Comfort, LLC
Exit EPA Disclaimer		 GT-6000 100959 5.7 0.22 stick wood;
batch load
Piney Manufacturing Limited
Exit EPA Disclaimer		 Optimizer
250		 78252 4.7 0.23 stick wood;
batch load
Greentech Manufacturing
Exit EPA Disclaimer		 RS7400-E 116597 8.04 0.23 stick wood;
batch load
Northwest Manufacturing, Inc. (Woodmaster)
Exit EPA Disclaimer		 AFS
900		 107069 2.49 0.24 wood pellets;
continuous feed
Pro-Fab Industries, Inc.
Exit EPA Disclaimer
Northland Dist. & Mfg Inc.
Exit EPA Disclaimer

Empyre Elite 100

Empyre Elite XT100

Pristine Series 1000

 48721 2.5 0.24 stick wood;
batch load
Wood Boiler
Exit EPA Disclaimer		 E4 77308 4.5 0.25 stick wood;
batch load
Marway Welding
 Phase 2-200 65336 3.75 0.26 stick wood;
batch load
Wood Doctor
Exit EPA Disclaimer		 WD-
HE8000		 112655 6.1 0.26 stick wood;
batch load
Steel Tech Inc. (Heatmaster SS)
Exit EPA Disclaimer		 G200 80368 5.6 0.27 stick wood;
batch load
Pro-Fab Industries Inc.
Exit EPA Disclaimer		 Empyre
Pro
Series
200		 66290 8.4 0.27 stick wood;
batch load
Central Boiler
Exit EPA Disclaimer		 E - Classic
1400		 107459 5.5 0.27 stick wood;
batch load
Heatmor
Exit EPA Disclaimer		 400 4S 160599 10.7 0.28 stick wood;
batch load
Earth Manufacturing
Exit EPA Disclaimer		 Klear Sky 400 45786 5.1 0.29 stick wood;
batch load
Piney Manufacturing Limited
Exit EPA Disclaimer 		Optimizer 350 160421 7.3 0.30 stick wood;
batch load
Hardy
Manufacturing
Company
Exit EPA Disclaimer		 KB165 73573 3.9 0.31 stick wood;
batch load
Hardy
Manufacturing
Company
Exit EPA Disclaimer		 KB220 77135 4.5 0.31 stick wood;
batch load
Central Boiler
Exit EPA Disclaimer		 E - Classic
2300		 160001 6.4 0.31 stick wood;
batch load
Pro-Fab Industries Inc.
Exit EPA Disclaimer

Empyre Elite 200

Empyre Elite XT 200

 64047 5.96 0.31 stick wood;
batch load
Pro-Fab Industries Inc.
Exit EPA Disclaimer		 Empyre
Pro
Series
400		 177333 6.1 0.31 stick wood;
batch load
Wood Doctor
Exit EPA Disclaimer		 HE-5000 44502 4.2 0.32 stick wood;
batch load

1 - Based on 8-hour test for stick wood models and 4-hour test for continuous feed models.
2 - EPA Phase 2 qualified level is 0.32 pounds of fine particles per million BTU of heat output (weighted average representing the range of burn rates expected in a year) and a maximum individual test run of 18.0 grams per hour. Typically, the maximum individual test run is the maximum heat output burn rate.

Jump to main content.