Outside Combustion Air - MHSC BVSTNSC Installation & Operating Instructions Manual

OUTSIDE COMBUSTION AIR PRECAUTIONS and RECOMMENDATIONS
NOTE: The use of outside air for combustion is op-
tional unless required by building codes. It is only
necessary to supply outside combustion air to one
side of fireplace. Use model 6AK combustion air kit
(refer to Page 17).
1. Avoid extremely long runs and numerous turns in duct
leading from fireplace to combustion air assembly.
These conditions increase the resistance to free flow
of air through duct. Figures 9 and 10
2. Locate combustion air assembly at an exterior loca-
tion. Make sure the location cannot be accidentally
blocked. Locate assembly above snow line to prevent
snow from blocking assembly.
3. Never mount combustion air inlet assembly in garage
or storage area where combustible fumes (gasoline)
might be drawn into fireplace.
4. Combustion air may be drawn from crawl space un-
der house when adequate supply of air is provided by
open ventilation. Figure 9
NOTE: Never take combustion air from attic space or
garage space.
NOTE: Install outside combustion air ONLY ON LEFT-
HAND SIDE of fireplace.
20301938
Duct Extended
to Miss Joist
8"
Maximum
Figure 10
FP2210a
outside air
B-Vent Specialty Gas Fireplaces
Installed above Basement or
Crawl Space
Figure 9
Inlet Grille
in Soffit
(Overhang)
Installed on Concrete Slab
FP2210a
FP2210a
outside air
11