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GENERAL INFORMATION
HOOD EXHAUST
Note
: Read the 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 6.
All ductwork must be metal. DO NOT use plastic duct. Check that
all connections are made securely.
OUTSIDE TOP EXHAUST
(EXAMPLE ONLY)
The following chart describes an example of one possible ductwork
installation.
DUCT PIECES
EQUIVALENT
LENGTH X
NUMBER USED
EQUIVALENT
LENGTH
Roof Cap
24 ft (7.3 m)
x 1
24 ft
(7.3 m)
12 ft.
Straight Duct
(6" Round)
12 ft (3.7 m)
x 1
12 ft
(3.7 m)
Rectangular-
to-Round
Transition
Adapter*
5 ft (1.5 m)
x 1
5 ft
(1.5 m)
Total Length 41 ft (12.5 m)
Equivalent lengths of duct pieces are based on actual tests and
reflect requirement for good venting performance with any vent
hood.
*IMPORTANT:
If a rectangular-to-round transition adapter 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 REAR EXHAUST
(EXAMPLE ONLY)
The following chart describes an example of one possible ductwork
installation.
DUCT PIECES
EQUIVALENT
LENGTH X
NUMBER USED
EQUIVALENT
LENGTH
Wall Cap
40 ft (12.2 m)
x 1
40 ft
(12.2 m)
3 Ft.
Straight Duct
(3¼" x 6" Round)
3 ft (91.4 cm) x 1
3 ft
(91.4 cm)
90˚ Elbow
10 ft (4 m)
x 2
20 ft
(6.1 m)
Total Length 63 ft (19.2 m)
Equivalent lengths of duct pieces are based on actual tests and
reflect requirement for good venting performance with any vent
hood.
Note:
Rear or horizontal exhaust is to be used. Care should be taken
to align the exhaust with the space between the studs or the wall
should be prepared at the time it is constructed by leaving enough
space between wall studs to accommodate exhaust.
