Outside Combustion Air Precautions And Recommendations; Combustion Air - Monessen Hearth BWB400A Installation And Operating Instructions Manual

OUTSIDE COMBUSTION AIR PRECAUTIONS AND RECOMMENDATIONS

COMBUSTION AIR

1. Locate combustion air assembly at an exterior location which is not likely to be accidentally blocked in any manner.
Locate assembly above the snow line to prevent blockage by snow accumulation.
2. Never mount the combustion air inlet assemblyin a garage or storage area where combustible fumes such as gasoline
might be drawn into the fireplace.
3. Combustion air can be drawn from the crawl space under a house when an adequate supply of air is provided by open
ventilation.
4. Do not take combustion air from attic space or garage space.
5. Avoid extremely long runs and numerous turns in the duct leading from the fireplace to the combustion air assembly.
These conditions increase the resistance to the free flow of air through the duct. See Figures 28 through 31 for methods
of installing the outside air for combustion assemblies.
Above
Snow
Level
Ground
Level
Figure 28 - Basement Installation
Do not take combustion
air from attic space or
garage.
61D0006
Plate
Basement
Wall
Termination Cap
Inlet Grill
8'max. in Soffit
(Overhang)
Figure 29 - Concrete Slab Installation
(Optional Outside Air Runs)
Continued
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