Outside Combustion Air - MHSC SSTB11 Installation, Operation And Maintenance Manual

OUTSIDE COMBUSTION AIR PRECAUTIONS & RECOMMENDATIONS
NOTE: The use of outside air for combustion is optional unless required by building codes. It is
only necessary to supply outside combustion air to one side of the fireplace. Use the Model AK4
combustion air kit.
Figure 23
Insulation Ring
Insert Shortest Side of the
Tube through the Fireplace
Outer Wrap to Properly
Seal Against Firebox Wall
and Gasket
Step 1: Secure outside air starting collar to left side of fire-
place with four (4) sheet metal screws provided.
NOTE: The starting collar extends through the outer fireplace
jacket and will seal against the firebox wall when secured as
indicated.
Figure 24
Duct Extended
to Miss Joint
To Outside Wall
Installation Above Basement
or Crawl Space
87D0174
Secure Outside Air Starting Collar to Fireplace
Longer Length of the Tube
to Outside
FP1900
FP1900
OA start collar
8/08
Second Floor
Firestop Spacer
FP2186
SSTB11 Woodburning Fireplace
Step 2: Secure outside duct to starting
collar with duct clamp or screws
Fireplace Outer Wrap
Firebox Insulation Seal
Termination Cap
Figure 25
Inlet Grille in
8' Max.
Soffit
(Overhang)
Concrete Slab Installation
(Optional Outside Air Runs)
FP2187
OA soffit install
1/09
FP1901
.
AK4 Combustion Air
Kit (Shortest Toward
Firebox)
AK4 Mounting Plate
FP1901
secure outside duct
8/08
Firestop
Spacer
CAUTION: Do not take
combustion air from at-
tic space or garage.
FP2187
19