7
6.
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
Required Clearances
From Heater
• Maintain the following clearance from
both combustible and non-combustible
materials.
Check
Illustration
12" or more(Indoor)
36" or more(Outdoor)
4" or more(Indoor)
24" or more(Outdoor)
6" or more(Indoor)
24" or more(Outdoor)
• 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
3" or more
• If the unit will be installed in the vicinity of a
permanent kitchen range or stove that has
the possibility of generating steam that
contains fats or oils, use a dividing plate or
other measure to ensure that the unit is not
exposed to air containing such impurities.
* The dividing plate should be of noncombust-
ible material of a width greater than the
water heater.
Exhaust hood
Range
Dividing plate
Water
heater
(unit: inch)
Cooking Equipment
3" or more
