Warnings
Keep the area around a boiler clear of combustible materials, gasoline, and other
flammable vapors and liquids.
Ensure combustion air is not drawn from areas containing corrosive air such as
swimming pools or spas, including air directly next to outdoor pools and spas.
Ensure that a boiler is not exposed to water leaks from piping or components
located overhead, including condensation from uninsulated cold water lines
overhead.
Protect the gas ignition system components from water (dripping, spraying, rain,
etc.) during appliance operation and when servicing (pump replacement,
condensate trap servicing, control replacement, etc.).
Ensure that combustible materials do not make contact with exposed water
piping and associated components (relief valves, circulators, etc.). Check local
codes for required clearances and/or provide adequate insulation.
3.2.1 Factors to consider for best installation conditions
Install the boiler in areas where the combustion air source is not subject to chemical fouling
or agricultural vapors. Exposure to corrosive chemical fumes such as chlorinated and/or
fluorinated hydrocarbons can reduce the life of a boiler. See list of Known contaminants on
page 6. For this reason, do not use the indoor air venting option (using air surrounding the
boiler) in a laundry room. Similarly, ensure any direct vent air source is not near a clothes
dryer exhaust terminal. Avoid agricultural applications where the boiler and/or the intake air
source are affected by ammonia and/or dust.
Avoid installing a boiler where water leakage will cause damage; for example, above
carpeting. If unavoidable, install a suitable drain pan under the appliance.
Other factors to consider:
The minimum clearance requirements for combustible materials (see Table 3 ).
For adequate servicing, we recommend a minimum 30" clearance at the front and 12"
above the boiler. Check local codes for additional access and service clearance
requirements.
At a new construction site, or when renovating:
Protect the boiler from drywall dust or other construction related contaminants.
Ensure combustion air is drawn from a clean source (e.g., outdoors).
Isolate the boiler from interior dust sources.
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