Hearth and Home Technologies I100 - Manual (Page 24)

24
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
Factory-built
fireplace
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).
Figure 7.18 Outside Combustion Air Placement
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3 ft min. from
top of uppermost
chimney section
to air inlet.
G. Install Outside Air Kits
• Refer to Figures 7.17 through 7.21.
• 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 both sides of
the fireplace.
• Locate the outside air hoods in a clear area, preferably
into prevailing wind during the heating season. Refer
to Figure 5.2 and Figure 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
as shown in Figure 7.17.
Figure 7.15 Slide Grate Retaining Bracket into Notch
• Slide grate retainers into notches in bottom of back
refractory on each side as shown in Figures 7.15 and
7.16. Place one on each side of back refractory.
Figure 7.16 Grate Retaining Bracket in Place
• Replace hearth stone.
• Place grate into fireplace and slide back legs into
brackets to hold grate in place.
• Repalce smoke shield and screen assemblies.
CAUTION! Risk of Fire or Asphyxiation! DO NOT draw out-
side 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.
Heatilator • I100 • 35144 • Rev AG 7/12
Figure 7.17 Possible Outside Air Inlet Locations