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SPECIFIC APPLIANCES, FIREPLACES AND SOLID FUEL-BURNING EQUIPMENT

dance with UL 1261. Pool and spa heat pump water heaters SECTION 920
shall comply with UL 1995 or CSA C22.2 No. 236. UNIT HEATERS
Exception: Portable residential spas and portable residen- 920.1 General. Unit heaters shall be installed in accordance
tial exercise spas shall comply with UL 1563 or CSA with the listing and the manufacturer’s instructions. Oil-fired
C22.2 No. 218.1. unit heaters shall be tested in accordance with UL 731.
920.2 Support. Suspended-type unit heaters shall be sup-
ported by elements that are designed and constructed to
SECTION 917
COOKING APPLIANCES accommodate the weight and dynamic loads. Hangers and
brackets shall be of noncombustible material. Suspended-
917.1 Cooking appliances. Cooking appliances that are type oil-fired unit heaters shall be installed in accordance
designed for permanent installation, including ranges, ovens, with NFPA 31.
stoves, broilers, grills, fryers, griddles and barbecues, shall be 920.3 Ductwork. A unit heater shall not be attached to a
listed, labeled and installed in accordance with the manufac- warm-air duct system unless listed for such installation.
turer’s instructions. Commercial electric cooking appliances
shall be listed and labeled in accordance with UL 197.
Household electric ranges shall be listed and labeled in accor- SECTION 921
dance with UL 858. Microwave cooking appliances shall be VENTED ROOM HEATERS
listed and labeled in accordance with UL 923. Oil-burning
stoves shall be listed and labeled in accordance with UL 896. 921.1 General. Vented room heaters shall be listed and
Solid-fuel-fired ovens shall be listed and labeled in accor- labeled and shall be installed in accordance with the condi-
dance with UL 2162. tions of the listing and the manufacturer’s instructions.
917.2 Domestic appliances. Cooking appliances installed
within dwelling units and within areas where domestic cook- SECTION 922
ing operations occur shall be listed and labeled as household- KEROSENE AND OIL-FIRED STOVES
type appliances for domestic use.
922.1 General. Kerosene and oil-fired stoves shall be listed
and labeled and shall be installed in accordance with the con-
SECTION 918 ditions of the listing and the manufacturer’s instructions. Ker-
FORCED-AIR WARM-AIR FURNACES osene and oil-fired stoves shall comply with NFPA 31 and
UL 896.
918.1 Forced-air furnaces. Oil-fired furnaces shall be tested
in accordance with UL 727. Electric furnaces shall be tested
in accordance with UL 1995. Solid fuel furnaces shall be SECTION 923
tested in accordance with UL 391. Forced-air furnaces shall SMALL CERAMIC KILNS
be installed in accordance with the listings and the manufac-
turer’s instructions. 923.1 General. Kilns shall be listed and labeled unless other-
wise approved in accordance with Section 105.2. Electric
918.2 Heat pumps. Electric heat pumps shall be tested in kilns shall comply with UL 499. The approval of unlisted
accordance with UL 1995.
appliances in accordance with Section 105.2 shall be based
918.3 Dampers. Volume dampers shall not be placed in the on approved engineering evaluation.
air inlet to a furnace in a manner that will reduce the required 923.1.1 Installation. Kilns shall be installed in accordance
air to the furnace.
with the manufacturer’s instructions and the provisions of
918.4 Circulating air ducts for forced-air warm-air fur- this code.
naces. Circulating air for fuel-burning, forced-air-type,
warm-air furnaces shall be conducted into the blower housing
from outside the furnace enclosure by continuous air-tight SECTION 924
ducts. STATIONARY FUEL CELL POWER SYSTEMS
918.5 Outdoor and return air openings. Outdoor intake 924.1 General. Stationary fuel cell power systems having a
openings shall be located in accordance with Section 401.4. power output not exceeding 10 MW shall be tested in accor-
Return air openings shall be located in accordance with Sec- dance with ANSI/CSA America FC 1 and shall be installed in
tion 601.5. accordance with the manufacturer’s instructions, NFPA 853,
the International Building Code and the International Fire
918.6 Outdoor opening protection. Outdoor air intake
openings shall be protected in accordance with Section 401.5. Code.

SECTION 919 SECTION 925
CONVERSION BURNERS MASONRY HEATERS
919.1 Conversion burners. The installation of conversion 925.1 General. Masonry heaters shall be constructed in
burners shall conform to ANSI Z21.8. accordance with the International Building Code.

92 2018 INTERNATIONAL MECHANICAL CODE 
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