Outside Air Kit - Heatilator C40 Installation Manual

H. Outside Air Kit
An outside air kit must be used for combustion. Hearth &
Home Technologies recommends you utilize the shortest
duct run to optimize the performance of the outside air
kit. The outside air 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 upper-
most chimney section to the outside air inlet hood.
Refer to Figures 3.10 and 3.11 when placing the outside
air inlet hood.
The outside air kit is installed on the right hand side of the
fireplace. See Figure 3.12 for handle location/operation.
• Cut a 6-1/2 in. (165 mm) hole in outside wall to
accommodate air piping.
• Use 6 in. (152 mm) metal flex or rigid piping (not supplied)
to directly connect outside air to fireplace intake.
Insulating the pipe isn't required but will help prevent
frost condensation.
• Use the supplied outside air inlet hood.
• Seal between the wall and the pipe with silicone to
prevent moisture penetration and air leaks.
• Seal between the outside air inlet hood 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 inlet hood close to exhaust
vents or chimneys. Fumes or odor could be drawn into
the room through the fireplace.
• Locate outside air inlet hood to prevent blockage from
leaves, snow/ice, or other debris. Blockages could cause
combustion air starvation.
CAUTION! Risk of Cuts/Abrasions. Wear protective
gloves and safety glasses during installation. Sheet metal
edges are sharp.
16 Heatilator • C40 Constitution • 480-2340 Installation Manual • Rev K • 8/24/15
Attic insulation shield
must be used to keep
insulation away from
chimney.
Ceiling firestop
on floor of attic.
Figure 3.10 Outside Air Inlet Locations
3 ft min. from top of
uppermost chimney
section to air inlet.