SB38 / SB44 Series Woodburning Fireplace
87D0057 7
(continued)
1. Extremely long runs and numerous turns in the duct leading from the fireplace to the combustion
air assembly should be avoided. These conditions will increase the resistance to the free flow
of air through the duct. Refer to Figures 3, 4, 31 and 32 for methods of installing the outside air
for combustion assemblies.
. The combustion air assembly should be located at an exterior location, which is not likely to be
accidentally blocked in any manner. The assembly should be located above the snow line to
prevent blockage by snow accumulation.
3. The combustion air inlet assembly should never be mounted in a garage or storage area where
combustible fumes such as gasoline might be drawn into the fireplace.
4. Combustion air can be drawn form the crawl space under a house when an adequate supply of
air is provided by open ventilation.
5. Do not take combustion air from attic space or garage space.
Figure 32
Screw
Nail
Holes
Screws
AK4 Inlet Air Vent
Duct
Extending
3” min.
6” Diameter Hole
FP1904
Outside Air Control Lever
(Lift to Open Pull Down
to Close)
FP4
1 2 3
2“
App.
FP1906
Duct connector
8/08
Loop Disengaged
Clamp Around
Duct
Slip Band
Through
Housing
Snap Screw
Down and
Tighten
FP1906
1. Push the insulation back approximately ” from the end of each
duct.
. Slip each duct over the duct connector until an equal length of
the connector extends into each duct.
3. Place a duct clamp over the end of each duct and tighten down
snugly.
4. Push the insulation back into place and over the duct clamp.
FP1907
Duct connector
8/08
Approximately
2”
Insulation
Duct
Duct Clamp
Duct Connector
FP1907
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