4
General information
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 contains an example of one possible ductwork installation.
DUCT PIECES
EQUIVALENT
LENGTH
x
NUMBER
USED
=
EQUIVALENT
LENGTH
Roof Cap
24 ft.
x
(1)
=
24 ft.
12 Ft. Straight Duct
(6" Round)
12 ft.
x
(1)
=
12 ft.
Rectangular-to-
Round Transition
Adaptor*
5 ft.
x
(1)
=
5 ft.
Equivalent lengths of duct pieces are based on actual tests
and reflect requirements for good venting performance with
any vent hood.
Total Length
=
41 ft.
* 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 contains an example of one possible ductwork installation.
DUCT PIECES
EQUIVALENT
LENGTH
x
NUMBER
USED
=
EQUIVALENT
LENGTH
Wall Cap
40 ft.
x
(1)
=
40 ft.
3 Ft. Straight Duct (3 ¼"
x 10" Rectangular)
3 ft.
x
(1)
=
3 ft.
90 ° Elbow
10 ft.
x
(2)
=
20 ft.
Equivalent lengths of duct pieces are based on actual tests
and reflect requirements for good venting performance with
any vent hood.
Total Length
=
63 ft.
NOTE
: For back exhaust, care should be taken to align the exhaust with the space between studs, or the wall should
be prepared at the time it is constructed by leaving enough space between the wall studs to accommodate exhaust.
HOOD EXHAUST
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2019-03-06 4:25:16
