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 the Natural Gas and Propane Installation
Code CSA B149.1 - latest edition for detailed requirements.
Item
Required Clearances
From Heater
• Maintain the following clearance from
both combustible and non-combustible
materials.
Check
Illustration
12" (300mm) or more(Indoor)
4" (100mm) or more(Indoor)
2" (50mm) or more(Indoor)
• If possible, leave 8" (200mm) or more on
either side of the unit to facilitate inspection.
• If possible, leave 24" (600mm) or more in
front of the unit to facilitate maintenance
and service if necessary.
• If possible, leave 3" (75mm) or more
above and below the vent pipe to facilitate
inspection and repair if necessary
Securing of space for
repair/inspection
• 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
noncombustible material of a width greater
than the water heater.
Exhaust hood
Range
Dividing plate
Water
heater
Cooking Equipment
WARNING
24" (600mm)
or more
3" (75mm) or more
3" (75mm) or more
8" (200mm)
or more
8" (200mm)
or more
