US EPA "Incentivized Voluntary Program": In coordination with NESCAUM,
USEPA officials from RTP in North Carolina developed an "Incentivized Voluntary
Program" to encourage OWB manufacturers on a nationwide basis to reduce emissions
from newly manufactured OWBs. EPA involved stakeholders during meetings and
conference calls to develop emission "guidelines", a test method, labels
and an implementation time line. Stakeholders included hydronic heater (OWB)
manufacturers, the Hearth Patio and Barbecue Association (HPBA), state
regulators, NESCAUM and Environment Canada. USEPA has made clear that it
does not intend to adopt mandatory emission limits or other mandatory
requirements for OWBs in the foreseeable future.
EPA has more recently expanded its voluntary program to include wood
and other biomass pellet boilers and indoor boilers, renaming this endeavor
the EPA Hydronic Heater Program. Under this program, any manufacturer whose
hydronic heaters are tested and shown to be capable of meeting EPA's prescribed
voluntary emission guideline will be allowed to display a label on each heating
unit that it meets EPA's criteria.
The implementation of the voluntary program involves multiple phases
with increasingly more stringent particulate emission goals. For phase I
of the program, the voluntary particulate emission guideline selected by
USEPA was: 0.6 pounds per million BTUs (lbs/MMBTU) of heat input. This number
is in the same general range as the limit set by Vermont's Phase I rule (0.44
lbs/MMBTU of heat input). The US EPA Phase 2 guideline of 0.32 lb/mmBTU of
heat output was announced by EPA at a ceremony here in Vermont on October
23, 2008. The test method developed by EPA to measure the particulate emissions
from OWBs is: "Test Method 28 OWHH for Measurement of Particulate Emissions
and Heating Efficiency of Outdoor Wood-fired Hydronic Heating Appliances".
This test method is a modification of EPA Method 28 used for the laboratory
certification testing of indoor woodstoves.
Details of the EPA program, a list of EPA qualified Hydronic Heaters
and other information about wood-fired hydronic heaters can be found on this
- OWB/OWHH website || The EPA
Test Method 28 OWHH