outdoor wood-fired boilers

Dealer Information

If you sell or plan to sell or lease outdoor wood boilers, this page provides much of the information you need to know to ensure that you are complying with Section 5-204 of Vermont's Air Pollution Control Regulations (APCR). Section 5-204 of the APCR, affects OWBs installed after October 1, 1997. Prior to that date OWBs in Vermont were subject only to a generic regulation regarding public nuisances or odors caused by air pollution sources.

Science and Testing

The science of air pollution is very complex and technical. Below is a "Technical Primer" giving the basics to help to interpret the research and technical documents.  See the links below for associated documents regarding the science and testing of OWBs.

Health And Environment

While all smoke is harmful, uncertified OWBs generate more particulate pollution than indoor wood stoves.  The units are designed to burn wood at lower combustion temperatures and generally have shorter stacks which emit smoke at house level. Wood smoke releases fine particulates ("soot"), carbon monoxide, and other toxic pollutants. While the new certified OWBs produce less smoke, wood yard with outdoor wood boilersmoke in any form is a potential human health problem.

Outdoor Wood Boilers

outdoor wood boiler and adjacent wood shedWith the high cost of heating oil, more Vermonters are looking to wood as a source of heat and hot water, but not all wood heat is the same. While indoor wood stoves have been tested and certified by the EPA for emissions since 1990, testing and certification of more efficient outdoor wood boilers (OWBs) is a more recent development.

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