Outside Air Kit (Optional) - Heatilator A36C Installation Manual

H. Outside Air Kit (optional)
If you install an outside air kit, Hearth & Home Technolo-
gies recommends you utilize the shortest duct run to op-
timize the performance of the outside air kit. The outside
air kit inlet hood should be positioned in a manner that
will not allow snow, leaves, etc. to block the inlet. In some
installations the air duct may need to be run vertically.
In such an installation, a 3 ft (914 mm) height difference
must be maintained from the top of the uppermost chim-
ney section to the outside air inlet hood.
Refer to Figures 3.8 and 3.9 when placing the outside air
inlet hood.
The outside air kit is installed on the left hand side of the
fireplace.
• Cut a 4 in. (102 mm) hole in outside wall to accommodate
air piping.
• Use 4 in. (102 mm) flex (not supplied) to directly connect
outside air to fireplace intake. Insulate the pipe to prevent
frost condensation.
• Use the supplied termination cap.
• Seal between the wall and the pipe with silicone to
prevent moisture penetration and air leaks.
• Seal between the termination cap and the house with
silicone to prevent air infiltration.
CAUTION! Risk of Fire or Asphyxiation! DO NOT draw
outside combustion air from wall, floor or ceiling cavity, or
enclosed spaces such as an attic or garage.
• DO NOT place outside air hood close to exhaust vents or
chimneys. Fumes or odor could be drawn into the room
through the fireplace.
• Locate outside air inlet to prevent blockage from leaves,
snow/ice, or other debris. Blockages could cause
combustion air starvation.
YES
Figure 3.9
Heatilator • A36/42C, A36/42CH • Installers Manual • 4017-262 • Rev D • 10/07/13
14
NO
Outlet blocked by
snow, leaves, etc.
Clear area
outside
house or in
ventilated
• Use UL181 Class 0 or Class 1 rigid or flexible ducting.
crawl space
• Install with short run or mainly straight duct, except small
dip for cold air trap which will help prevent flow of cold air.
• Secure flex duct with metal tape, screws or wire ties.
Outside Air Installation
CAUTION! Risk of Cuts/Abrasions.
gloves and safety glasses during installation. Sheet metal
edges are sharp.
3 ft min. from
top of uppermost
chimney section
to air inlet.
Figure 3.8
NO
Garage or
NO
combustible
liquids storage Attic space
Factory-built
fireplace
Outside Air Inlet Locations
NO
Outlet placed
higher than 3 ft
below the
termination cap
Wear protective