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VT Certified OWBS
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Vermont Department of Environmental Conservation

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Vermont Certified Outdoor Wood Boilers

The following table lists OWBs certified by Vermont to meet a particulate emissions standard of 0.44 lb/mmBTU of heat input.  OWB models are listed from lowest to highest emissions to the atmosphere based on lb/mmBTU heat input.

After March 31, 2008, OWBs are not allowed to be sold in Vermont or for installation in Vermont unless Vermont has certified that the particular model has been tested and complies with this standard.

Manufacturer

Model

8-hr. heat
Output Rating

(BTU/hr)

Average Emission Rate
(grams/hr)

Average Emission Rate
(lb/mmBTU heat input)

Vermont Emission Limit
(lb/mmBTU heat input)

Average
Emission Rate
(lbs/mmBTU heat output)

Greenwood Technologies

Aspen 175

66,290

8.4

0.18

0.44

0.27

Central Boiler

E-Classic 2300

160,001

6.4

0.20

0.44

0.31

Heatmor

200 SSR

71,923

20.3

0.35

0.44

0.76

Sequoyah
Paradise

E3400

101,020

20.1

0.37

0.44

1.48

Greenwood Technologies

100

18,248

13.64

0.42

0.44

1.36

Alternative Fuel Boilers

EBW 150

27,441

14.1

0.43

0.44

0.80

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Note: The emission rates in this table are annual averages, unless the unit was approved based on heating season emissions only.  Click on Manufacturer name above to view full certification letter.

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Vermont Department of Environmental Conservation
Air Pollution Control Division

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