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Step 2
Install the Ductwork
Use minimum 26 gauge galvanized or 24 gauge
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.
DO NOT
use
flexible plastic ducting.
■Always use an appropriate roof or wall cap with
damper. Laundry type wall caps should never be
used.
■Use the straightest duct run possible.
■For satisfactory performance the duct run should
not exceed 150 ft. or its equivalent length if bends or
other various fittings are used. Refer to table of
equivalent lengths for various duct configurations.
■Install ductwork so that the piece of duct nearest
the downdraft unit slots INTO the next piece of the
duct. Secure the joints with self-tapping screws and
apply duct tape around the joints to ensure an
airtight seal.
21
Step 1
Install Downdraft Vent
Place the downdraft vent into the countertop cutout,
against the back side.
Place the downdraft vent into the countertop cutout,
against the back side.
■Secure the downdraft to the countertop supplied
brackets. See illustration.
–Fasten brackets to top screws on the front side of
the vent, secure to cabinet side wall just below the
countertop. Or,
–Fasten one bracket to vent side and secure to
cabinet back wall.
–Install two brackets on the bottom of the vent.
Attach brackets to slide screws on the vent and to
the floor using wood screws (not supplied).
■When installing in a tile countertop surface, it may
be necessary to apply a locally approved caulking to
cover any gaps.
Optional Method –
Secure to Cabinet
Side With Top
Screw on Case
Or Use 2nd Screw
Preferred Method –
Secure the Upper
Brackets With Screws
Located on the side of
Case and Attach to
Back Wall of Cabinet
Secure the Lower Brackets
to Blower Housing
Duct tape over seam and
screw
Screw
Air flow
(continued on next page)
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