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Outlet placed
higher than 3 ft
below the
termination cap
Attic space
Garage or
combustible
liquids storage
Outlet blocked by
snow, leaves, etc.
Clear area
outside
house or in
ventilated
crawl space
YES
NO
NO
NO
NO
Use only duct materials specified
by manufacturer (preferably with
short run or mainly straight duct,
except small dip for cold air trap
which will help prevent flow of cold air).
Factory-built
fireplace
Figure 7.17 Outside Combustion Air Placement
Outside Air
Hood
Outside Air
Plate
Assembly
2 Wire Ties
Flexible Duct
(not supplied)
Figure 7.18 Outside Air Installation
I. Install Outside Air Kit
CAUTION! Risk of Fire or Asphyxiation! DO NOT draw
outside combustion air from wall, fl oor 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 fi replace.
• Locate outside air inlet to prevent blockage from
leaves, snow/ice, or other debris. Blockages could
cause combustion air starvation.
• Keep duct runs short and straight to minimize restriction.
A small dip is acceptable for a cold air trap.
• The outside air kit must be installed on the left hand side
of the fi replace.
• Locate the outside air hood in a clear area, preferably
into prevailing wind during the heating season. Refer to
Figure 5.2.
• Install as shown in Figures 7.16, 7.17 and 7.18.
• The air duct may be run vertically.
• The outside air hood must be at least 3 ft (.91 m) below
the top of the uppermost chimney section.
Heat & Glo • EXCLAIM-36, EXCLAIM-42 • 4013-251 Rev C • 11/08