Heatilator ST42A Owner's Manual page 14

3 ft min. from top of
uppermost chimney
section to air inlet.
Figure 4.2 Outside Air Inlet Locations
NO
Outlet blocked by
snow, leaves, etc.
YES
Clear area
outside
house or in
ventilated
crawl space
Figure 4.3 Outside Combustion Air Placement
14
Attic insulation shield
must be used to keep
insulation away from
chimney.
Ceiling firestop
on floor of attic.
11-10 in./279-254 mm
adaptor not shown.
NO
Garage or
combustible
liquids storage
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).
Heatilator • ST42A US-CAN • 4012-039 Rev D • 11/07
NO
Attic space
NO
Outlet placed
higher than 3 ft
below the
termination cap
(Push slider to open.)
Figure 4.4 Locating the Outside Air Control
Note: Chimney air kit and 11-10 in. (279-
254 mm) adapter required in Canada.