THIS FURNACE AND ANY OTHER
FUEL-BURNING APPLIANCE MUST
BE PROVIDED WITH ENOUGH
FRESH AIR FOR PROPER COMBUS-
TION AND VENTILATION OF THE
FLUE GASES. MOST HOMES WILL
REQUIRE THAT OUTSIDE AIR BE
SUPPLIED INTO THE FURNACE
AREA. FAILURE TO DO SO CAN
CAUSE DEATH FROM CARBON
MONOXIDE POISONING.
Adequate facilities for providing air for
combustion and ventilation must be
provided in accordance with section
5.3, Air for Combustion and Ventilation,
of the National Fuel Gas Code, ANSI,
Z223.1 latest edition or CSA B149.1
and .2 or, applicable provisions for the
local building codes, and not obstructed
so as to prevent the flow of air to the
furnace.
FIGURE 6
HORIZONTAL RETURN AIR DUCT
(LEFT-HAND AIRFLOW POSITION SHOWN)
FIGURE 7
AIR FROM HEATED SPACE
COMBUSTION AIR REQUIRE-
MENTS
IMPORTANT: Air for combustion and
ventilation must not come from a corro-
sive atmosphere. Any failure due to cor-
rosive elements in the atmosphere is
excluded from warranty coverage.
The following types of installation may
require OUTDOOR AIR for combustion,
due to chemical exposures:
• Commercial buildings
• Buildings with indoor pools
• Furnaces installed in laundry
rooms
• Furnaces in hobby or craft rooms
• Furnaces installed near chemical
storage areas.
Exposure to the following sub-
stances in the combustion air supply
may also require OUTDOOR AIR for
combustion:
• Permanent wave solutions
• Chlorinated waxes and cleaners
• Chlorine-based swimming pool
chemicals
• Water softening chemicals
• De-icing salts or chemicals
• Carbon tetrachloride
• Halogen type refrigerants
• Cleaning solvents (such as
perchloroethylene)
• Printing inks, paint removers,
varnishes, etc.
• Hydrochloric acid
• Cements and glues
• Antistatic fabric softeners for
clothes dryers
• Masonry acid washing materials
COMBUSTION AND VENTILATION AIR
WARNING
!
FOUR ANGLE BRACKETS ARE SHIPPED WITH EACH
UNIT THAT CAN BE USED TO SECURE THE RETURN
AIR DUCT TO A HORIZONTAL UNIT.
IMPORTANT: This is not a direct vent furnace. Review venting instructions
before installing.
RETURN
AIRFLOW
REAR VIEW
12
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