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OUTSIDE COMBUSTION AIR PRECAUTIONS & RECOMMENDATIONS
21
CONCRETE SLAB INSTALLATION
(OPTIONAL OUTSIDE AIR RUNS)
INLET GRILLE
IN SOFFIT
(OVERHANG)
8' MAX.
FIRESTOP SPACER
CAUTION: DO NOT TAKE
COMBUSTION AIR FROM
ATTIC SPACE OR GARAGE.
TERMINATION CAP
INSTALLATION ABOVE BASEMENT
INSTALLATION ABOVE BASEMENT
OR CRAWL SPACE
OR CRAWL SPACE
FIRESTOP SPACER
TO OUTSIDE WALL
DUCT EXTENDED
TO MISS JOIST
SECOND FLOOR
LONGER LENGTH OF THE TUBE
TO OUTSIDE.
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 FIREPLACE WITH
FOUR 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.
SECURING OUTSIDE AIR STARTING COLLAR TO FIREPLACE
STEP 2: SECURE OUTSIDE
DUCT TO STARTING COLLAR
WITH DUCT CLAMP OR SCREWS.
AK4 COMBUSTION
AIR KIT (SHORTEST
TOWARD FIREBOX)
AK4 MOUNTING PLATE
FIREBOX INSULATION SEAL
FIREPLACE OUTER WRAP
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
53D9028. Rev 1 03/03