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4 English
General information
General information
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 reect
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
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 12.
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 reect
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 t, using the tin snips, in order to allow free
movement of the damper.
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