All wood stoves and pellet stoves sold in the state of Washington must meet Washington emission standards (WAC
173-433). The particulate emissions must be less than or equal
to 2.5 grams per hour for catalytic wood stoves and 4.5 grams per
hour for non-catalytic wood stoves. Even if a particular unit is EPA-certified, it may not necessarily be Washington-certified.
The Washington Department of Ecology maintains a list of Washington-certified solid fuel burning devices online here.
Any new wood burning device sold, offered for sale, or given away to Washington residents must meet Washington’s standards. Even devices that are exempt from EPA certification must meet Washington standards. Wood burning devices include:
- wood stoves
- pellet stoves
- wood furnaces
- manufactured fireplaces
stoves are not exempt from Washington emission standards. All
pellet stoves for sale in the state of Washington are subject
to AAA testing to prove compliance with state law.
additional information on certification in SWCAA's region (Clark,
Lewis, Skamania and Wahkiakum counties in Washington state) call
1-800-633-0709. If you live outside SWCAA's region, please call
your local air agency.