Furnace Venting Installations
Th
e vent terminal should be located no fewer than 6 feet from an
inside corner formed by two exterior walls; a 10 foot distance is
recommended.
Recommended clearance from overhangs is a minimum of 1 foot
vertically for each foot horizontally up to 6 feet.
!
WARNING
READ AND FOLLOW ALL INSTRUCTIONS IN THIS
SECTION. FAILURE TO PROPERLY VENT THIS FUR-
NACE CAN CAUSE CARBON MONOXIDE POISON-
ING OR AN EXPLOSION OR FIRE RESULTING IN
PROPERTY DAMAGE, PERSONAL INJURY OR LOSS
OF LIFE.
Non-Direct Vent Installation (Using Indoor Combustion
Air)
Non-direct vent installations require only a vent pipe. Th is may be
desirable when using outdoor combustion air is not practical.
• Provisions are not made for routing of combustion air;
• Th
e outdoor environment may contain contaminants un-
desirable for combustion.
Direct Vent Installation (Using Outdoor Combustion Air)
Th
e direct vent confi guration is the preferred installation method.
Th
e primary advantages are:
• No special kit or modifi cations are required for direct vent
installations
• Dedicated combustion air and vent piping eliminates the
need to use already heated air for combustion purposes;
• Th
e probability of corrosive contaminants being present in
the combustion air is greatly reduced;
• Th
e direct vent confi guration is unaff ected by any other ap-
pliances, exhaust fans, or other devices that tend to create
negative pressure conditions while operating.
• No vents for combustion and ventilation air are required in
confi ned spaces
12 - VENTING GUIDELINES
Combustion Air
Th
is furnace is certifi ed as a Category IV Type FSP Non-Direct and
Direct Vent Furnace. When installed as a direct vent furnace, all
combustion air is supplied from the outdoors via the plastic piping
system. All components are fi eld supplied except for the adapter
used to connect the piping to the furnace.
Th
e combustion air piping, like the exhaust piping, must be air tight
throughout the system. Th
e adapter joining the combustion air to the
furnace is supplied with a gasket to maintain the seal.
NOTICE
IMPORTANT: Th
e supplied adapter is made of PVC. If
planning to use ABS pipe, use an all-purpose cleaner and
ABS to PVC transition cement. If planning to use CPVC
pipe, use an all-purpose cleaner, a clear or purple primer
and all-purpose cement approved for the purpose.
Additional information about cleaners, primers, solvents
and cements may be obtained from their manufacturers.
NOTICE
IMPORTANT: If the furnace is to be installed in the vicin-
ity of other fuel burning appliances, adequate combustion
air must be available for the non-direct vent appliances.
See Section 11 of this manual, “Determining Combustion
Air.”
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