3 ft min. from
top of uppermost
chimney section
to air inlet.
Figure 7.3
Outside Air Inlet Locations
NO
Outlet blocked by
snow, leaves, etc.
YES
Clear area
outside
house or in
ventilated
crawl space
Figure 7.4
Outside Air Placement
22
Outside air installed
on both sides (right
side not shown)
NO
Garage or
NO
combustible
liquids storage
Attic space
Factory-built
fireplace
Heatilator • Birmingham BIR42 • 4059-308 Rev F • 11/08
NO
Outlet placed
higher than 3 ft
below the
termination cap