Owner`s manual

Page 39
AIR FOR COMBUSTION AND
VENTILATION OUTDOORS
Provide extra fresh combustion and ventilation air by using ventilation grills or ducts.
You must provide two permanent openings: one within 12" of the ceiling and one within 12"
of the floor. Connect these items directly to the outdoors. These spaces include attics
and crawl spaces. Follow the 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 the attic will activate the power vent.
Figure 10
Ventilated Attic
Outlet Air
Inlet Air
Ventilated
Crawl Space
To
Crawl
Space
To Attic
Outlet Air
Inlet Air
WARNING
THIS HEATER MUST HAVE ADEQUATE AMOUNT OF AIR FOR PROPER
OPERATION. IF NOT, POOR FUEL COMBUSTION COULD RESULT. READ THE
FOLLOWING INSTRUCTIONS TO ENSURE PROPER AMOUNT OF AIR FOR THIS AND
OTHER FUEL-BURNING APPLIANCES IN YOUR HOME.