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.)
