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9
4.0 CLEARANCE TO COMBUSTIBLES
WARNING
!
Install vent at clearances specifi ed by the vent manufacturer.
Observe clearance to combustibles between plenum / horizontal duct run and ceiling. Minimum clear-
ance between top of plenum / top of duct for a distance or 4 ft away from plenum is 6". Duct work
greater than 4 ft from plenum can have clearances to ceiling reduced to 1"
Minimum clearance to combustibles walls or panels from the
WALL
furnace assembly must be;
A = 12" (30 cm)
B
B = 12" (30 cm)
C = 12" (30 cm)
D = 48" (76 cm)
However, for easy access around the furnace and hopper, we
A
recommend B, C to be 24" wide to walk around and service.
Clearance from top of plenum/ horizontal duct to ceiling is
minimum 6" (15 cm) for the fi rst 4 feet of ducting away from the
furnace. Ducting runs greater than 4 feet from the unit can have
clearance to ceilings reduced to 1 inch.
DOOR
WALL
Flue exhaust pipe should continue as 6" up to the point it
connects to chimney. Chimney diameter to be 6" or larger, if
possible.
FURNACE PLACEMENT
TOP VIEW
Floor must be non-combustible (concrete, tile, etc.).
Ceiling
1 Inch
6 Inches
Horizontal
Duct
Plenum
4 feet
W415-0771 / B / 08.10.09
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