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HOOD EXHAUST
NOTE: Read these next two pages only if you plan to vent your exhaust to the outside. If you plan to recirculate the air back
into the room,
proceed to page 11.
OUTSIDE TOP EXHAUST (EXAMPLE ONLY)
The following chart describes an example of one possible
ductwork installation.
DUCT PIECES
Equivalent lengths of duct pieces are based on actual tests and
reflect requirements for good venting performance with any vent hood.
* IMPORTANT: If a rectangular-to-round transition adaptor is used, the bottom corners of the damper
will have to be cut to fit, using the tin snips, in order to allow free movement of the damper.
OUTSIDE BACK EXHAUST (EXAMPLE ONLY)
The following chart describes an example of one possible
ductwork installation.
DUCT PIECES
Equivalent lengths of duct pieces are based on actual tests and
reflect requirements for good venting performance with any vent hood.
NOTE: For back exhaust, care should be taken to align exhaust with space between studs, or wall
should be prepared at the time it is constructed by leaving enough space between the wall studs to
accommodate exhaust.
31-7000092 Rev. 2
Installation Instructions
EQUIVALENT
LENGTH
Roof Cap
24 Ft.
12 Ft. Straight Duct
12 Ft.
Rectangular-to-Round 5 Ft.
Transition Adaptor*
Wall Cap
3 Ft. Straight Duct
(3
1 4
90° Elbow
NUMBER
x
USED
x
(1)
x
(1)
x
(1)
Total Length
EQUIVALENT
NUMBER
LENGTH*
x
USED
40 Ft.
x
(1)
3 Ft.
x
(1)
10 Ft.
x
(2)
Total Length
=
LENGTH
=
24 Ft.
=
12 Ft.
=
5 Ft.
=
41 Ft.
=
LENGTH
=
40 Ft.
=
3 Ft.
=
20 Ft.
=
63 Ft.
3
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