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62D4036
12
BBV, SBV Series Natural Vent Gas Fireplaces
OUTSIDE COMBUSTION AIR
NOTE: The use of outside air for combus-
tion is optional unless required by building
codes. It is only necessary to supply outside
combustion air to one side of fireplace. Use
model OAC4 combustion air kit (refer to Page
17).
1. Avoid extremely long runs and numer-
ous turns in duct leading from fireplace
to combustion air assembly. These condi-
tions increase the resistance to free flow
of air through duct. Figures 9 and 10
2. Locate combustion air assembly at an
exterior location. 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 assem-
bly in garage or storage area where com-
bustible fumes (gasoline) might be drawn
into fireplace.
4. Combustion air may be drawn from crawl
space under house when adequate sup-
ply 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.
&0
/!BASEMENT
Duct Extend-
ed to Miss
Joist
To Outside
Wall
FP2021
Figure 9 -
Install Unit Above Basement or Crawl Space
&0
/!SOFFIT
Inlet Grille
in Soffit
(Overhang)
8” Maximum
Figure 10 -
Install Unit on Concrete Slab with Optional Outside Air Runs
FP2022