Vermont DEC Air Pollution Control Division

Outdoor Wood-Fired Boilers
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Vermont Regulations

"Some outdoor boilers make so much smoke and air pollution that many neighbours complain. Numerous rural municipalities in Canada have either considered banning them or are proceeding to do so."
Canada Natural Resources
In response to complaints about outdoor wood boilers in the early 1990s the Vermont ANR adopted regulations (Section 5-204) that apply to OWBs installed after October 1, 1997. This regulation established set-back and stack height requirements for OWB installations but did not set an emission standard that would reduce the air pollution emissions from these units. Because complaints continued and OWBs have become increasingly popular causing greater impacts on Vermont's air quality, the ANR adopted a new rule in April, 2007 that established a "Phase I" particulate emissions standard for OWBs sold in Vermont. The ANR has now adopted a "Phase II" particulate emission standard for OWBs sold for installation in Vermont. This rule also regulates outdoor pellet-fired boilers for the first time in Vermont. The Phase II particulate standard, effective on March, 31, 2010, will promote the sale and installation of much more efficient and cleaner wood burning technologies in Vermont.

Links to the current Phase II regulation and the announcement letter to manufacturers are listed below.

CURRENT OWB REGULATION (PDF)  || ANNOUNCEMENT LETTER (pdf)

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Vermont Department of Environmental Conservation
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