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NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
15
Figure 20
Figure 19
OUTSIDE AIR KIT
During operation, the fireplace requires fresh
air for combustion and draws air from outside
the house. It may starve other fuel burning
appliances such as gas or oil furnaces. As
well, exhaust fans may compete for air, caus-
ing negative pressure in the house, resulting in
smoke entering the house from the fireplace.
This situation is aggravated in modern airtight
houses. To overcome this potential problem,
we require the installation of an outside air
assembly.
The outside air assembly must be installed ac-
cording to the following requirements :
1. Duct length should be kept to a minimum.
The maximum length of a 4" I.D. (100mm)
insulated flexible duct is 20 feet (6.1 m).
The duct can be extended to a maximum
of 40 feet (12 m) using a 6" I.D. (150mm)
insulated flexible duct.
2. The air intake register must not be installed
more than 7 feet (2135 mm) above the base
of the fireplace.
3. The fresh air must come from outside the
house. The air intake must not draw air from
the attic, from the basement or garage.
4. The air intake register should be installed
where it is not likely to be blocked by snow
or exposed to extreme wind and well away
from automobile exhaust fumes, gas meters
and other vents.
5. The duct and register may be installed above
or below floor level.
Outside Air Installation
Make a 4-1/4" (110 mm) hole in the outside
wall of the house at the chosen location. From
outside, place the outside air register in the
hole (open side down) and fasten the register
to the wall, with screws as shown (see Figure
19). Slip the pipe into the insulated sleeve.
Place the insulated pipe over the register tube
and over the fireplace’s outside air connector
(see Figure 20). At each end, carefully pull
back the insulation and plastic cover exposing
the flexible pipe.
Using the aluminium tape provided, wrap the
tape around the joint between the flexible pipe
and the air inlets. Carefully push the insulation
and plastic cover back over the pipe. Using
aluminium tape, fasten the plastic cover in
place.
FIREPLACE CONNECTION
ALUMINUM TAPE
PLASTIC
COVER
INSULATION
FLEXIBLE PIPE
ALUMINUM TAPE
FIREPLACE
OUTSIDE AIR CONNECTION TO THE FIREPLACE
INSULATION
WALL
OPENING FACING
DOWN
SCREW
FLEXIBLE PIPE
PLASTIC COVER
ALUMINIUM TAPE
OUTSIDE
INTAKE
OUTSIDE AIR CONNECTION