1204.1 Equipment and systems. Interior spaces intended for
human occupancy shall be provided with active or passive
space-heating systems capable of maintaining a minimum indoor
temperature of 68°F (20°C) at a point 3 feet (914 mm) above
the floor on the design heating day.
EXCEPTION:
1. Interior spaces where the primary purpose is not associated with human comfort.
2. Group R-1 Occupancies not more than 500 square feet.
1204.2.1Definitions. For the purposes of this section only,
the following definitions apply.
DESIGNATED AREAS are those areas designated by a county to be an
urban growth area in chapter 36.70A RCW and those areas
designated by the U.S. Environmental Protection Agency as
being in nonattainment for particulate matter.
SUBSTANTIALLY REMODELED means any alteration or restoration of a
building exceeding 60 percent of the appraised value of such
building within a 12-month period. For the purpose of this
section, the appraised value is the estimated cost to replace
the building and structure in-kind, based on current
replacement costs.
1204.2.2 Primary heating source. Primary heating sources in
all new and substantially remodeled buildings in designated
areas shall not be dependent upon wood stoves.
1204.2.3 Solid fuel burning devices. No used solid fuel
burning device shall be installed in new or existing buildings
unless such device is United States Environmental Protection
Agency certified or a pellet stove either certified or exempt
from certification by the United States Environmental
Protection Agency.
EXCEPTION:
Antique wood cook stoves and heaters manufactured prior to 1940.