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Figure 7
Ventilation Air From Outdoors
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 4.3, “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
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.
