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22
OPTIONAL INSTALLATION:
REAR WALL VENTING
5″ round duct may be used on SHORT DUCT
runs of 3 feet or less, such as direct to outside
wall venting.
To convert blower exhaust direction, remove
four nuts behind the filter which hold blower
and wire finger guard.
Rotate blower and reinstall to vent chamber,
as shown above. Retighten nuts, but do not
overtighten.
INSTALLING THE DUCTWORK
Use galvanized or aluminum duct in 6″ round
or 3
1
⁄4″ x 10″ size, or a combination of both.
PVC duct should be used if installing under a
poured concrete slab.
NOTE: Local building code must be followed
in specifying approved type and schedule of
ALL duct used.
Always use an appropriate roof or wall cap
with damper. Laundry-type wall caps should
NEVER be used.
Install ductwork, making male-female
connections in the direction of airflow as
shown. Secure all joints with sheet metal
screws and duct tape to assure an airtight
seal.
Use the shortest and straightest duct run
possible. For satisfactory performance the
duct run should not exceed 100 feet
equivalent length. Refer to TABLE 1 of
equivalent lengths. Use TABLE 1 to calculate
the total equivalent length of the ductwork.
Through Cabinet Toe Space Between Floor Joist
Downward Venting
Duct Tape Over Seam
and Screw
Air Flow
Inside Wall to Roof Direct to Outside
Rear Wall Venting
Screw
6
Installation Instructions
DUCTWORK INSTALLATION
(Note: For planning purposes only.)
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