3 ft. (91cm) min. from
top of uppermost
chimney section to
outside air inlet.
Locate outside air inlet
to prevent blockage
from leaves, snow/ice,
or other debris.
Attic insulation shield
must be used to keep
insulation away from
chimney.
Ceiling firestop
on floor of attic
Outlet blocked by
snow, leaves, etc.
NO
Garage or
combustible
liquids storage
NO
Attic space
NO
Outlet placed
higher than 3 ft
below the
termination cap
NO
UL181 Listed Class 0
or Class 1 metal flex or
rigid duct
Figure 3.11 Outside Air Installation
Figure 3.10 Outside Air Inlet Locations
17
Quadra-Fire • 7100 FP • 433-3610 Installation Manual • Rev G • 5/27/14
