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NOTE: If you need to install ducts, note that the total duct
length of 3 ¼" x 10" rectangular or 6" diameter round duct
should not exceed 140 equivalent feet.
Outside ventilation requires a HOOD EXHAUST DUCT.
Read the following carefully.
NOTE: It is important that venting be installed using the
most direct route and with as few elbows as possible.
This ensures clear venting of exhaust and helps prevent
blockages. Also, make sure dampers swing freely and
nothing is blocking the ducts.
Exhaust connection:
The hood exhaust has been designed to mate with a
standard 3 ¼" x 10" rectangular duct.
If a round duct is required, a rectangular-to-round
transition adaptor must be used. Do not use less than a 6"
diameter duct.
DUCT PIECES
Rectangular-to-Round
Transition Adaptor*
90 ° Elbow
45 ° Elbow
90 ° Elbow
45 ° Elbow
Straight Duct 6" Round or 3
¼" x 10" Rectangular
* IMPORTANT: If a rectangular-to-round
DE68-04108A-08_IM_ME18H704SFB_AA_EN.indd 5
DE68-04108A-08_IM_ME18H704SFB_AA_EN.indd 5
EQUIVALENT
LENGTH
Wall Cap
40 ft.
10 ft.
25 ft.
Roof Cap
24 ft.
transition adaptor is used, the bottom
corners of the damper will have to be
cut to fit, using tin snips, to allow free
movement of the damper.
Maximum duct length:
For satisfactory air movement, the total duct length of
3 ¼" x 10" rectangular or 6" diameter round duct should
not exceed 140 equivalent feet.
Elbows, transitions, wall and roof caps,
etc.
present additional resistance to airflow and are
equivalent to a section of straight duct which is longer
than their actual physical size. When calculating the total
duct length, add the equivalent lengths of all transitions
and adaptors plus the length of all straight duct sections.
The chart below shows you how to calculate total
equivalent ductwork length using the equivalent length
in feet of some typical ducts.
x
NUMBER USED
5 ft.
x
( )
x
( )
x
( )
5 ft.
x
( )
x
( )
5 ft.
x
( )
x
( )
1 ft.
x
( )
Total Ductwork =
Equivalent lengths of duct pieces are based
on actual tests and reflect the requirements
for good venting performance with any vent
hood.
5
General information
EQUIVALENT
=
LENGTH
=
=
=
=
=
=
=
=
2024-02-16 오전 9:30:33
2024-02-16 오전 9:30:33
ft.
ft.
ft.
ft.
ft.
ft.
ft.
ft.
ft.
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