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WARNING
THIS HEATER MUST HAVE ADEQUATE AMOUNT OF AIR FOR PROPER
OPERATION. IF NOT, POOR FUEL COMBUSTION COULD RESULT. READ THE
FOLLOWING INSTRUCTIONS TO INSURE PROPER FRESH AIR FOR THIS AND
OTHER FUEL-BURNING APPLIANCES IN YOUR HOME.
AIR FOR COMBUSTION AND VENTILATION
FROM OUTDOORS
Provide extra fresh air by using ventilation grills or ducts. You must provide two permanent
openings: one within 12" of ceiling and one within 12" of floor. Connect these items directly
to outdoors. These spaces include attics and crawl spaces. Follow National Fuel Gas Code
NFPA 54/ANSI Z223.1, Section 5.3, “Air For Combustion and Ventilation” for required size of
ventilation grills or ducts.
IMPORTANT: Do not provide openings for inlet air into attic if attic has a thermostat-
controlled power vent. Heated air entering attic will activate power unit.
Ventilated Attic
Outlet Air
Inlet Air
Outlet Air
To Attic
To Crawl
Space
Inlet Air
Ventilation
To Crawl Space
Figure 7
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