Hearth and Home Technologies HST-48D - Manual (Page 22)

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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 7.4 Outside Combustion Air Placement
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3 ft min. from
top of uppermost
chimney section
to air inlet.
Heat & Glo • HST-48D US-CAN • 4012-040 • Rev F • 11/08
Figure 7.3 Possible Outside Air Inlet Locations
Note: Chimney air kit and
11-10 in./279 -25 4 mm
adapter are not shown, but
are required in Canada.