6
5. Installation Clearances
Before installing, check for the following:
Install in accordance with relevant building and mechanical codes, as well as any local, state or
national regulations, or in the absence of local and state codes, to the National Fuel Gas Code ANSI
Z223.1/NFPA 54 – latest edition. In Canada, see NSCNGPIC for detailed requirements.
WARNING
Item
Distance from combustibles
• Maintain the following clearances
from both combustible and
non-combustible materials.
• There must be a clearance of 24" or
more in front of the Flue terminal.
• This restriction will not be applied to an
area where an effective shield makes a
clearance of 24" or more in front of the
exhaust outlet.
Check Illustration
• If possible, leave 8" or more on either
side of the unit to facilitate inspection.
• If possible, leave 24" or more in front of
the unit to facilitate maintenance
and service if necessary.
• If possible, leave 3" or more above and
below the vent pipe to facilitate inspec-
tion and repair if necessary
Securing of space for
repair/inspection
24" or
more
8" or
more
8" or
more
Outdoor Clearances to Opening
into Any Building
Distance from
the side
12"
or
more
2" or
more
12"
or more
12" or
more
12" or
more
There must be no
building opening
within this area.
12" or
more
Flue terminal
3"
or more
3"
or more
4" or
more
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