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NOTE: If you need to install ducts, note that the total
" x 10" rectangular or 6" diameter
duct length of 3
⁄
1
4
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
" x 10" rectangular duct.
standard 3
⁄
1
4
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*
Wall Cap
90° Elbow
45° Elbow
90° Elbow
45° Elbow
Roof Cap
Straight Duct 6" Round or
" x 10" Rectangular
3
1
⁄
4
* 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.
Installation Instructions
EQUIVALENT
LENGTH
5 Ft.
40 Ft.
10 Ft.
5 Ft.
25 Ft.
5 Ft.
24 Ft.
1 Ft.
Maximum duct length:
For satisfactory air movement, the total duct length of
" x 10" rectangular or 6" diameter round duct should
3
⁄
1
4
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
approximate feet of equivalent length of some typical
ducts.
NUMBER
x
USED
x
( )
x
( )
x
( )
x
( )
x
( )
x
( )
x
( )
x
( )
Total Ductwork
Equivalent lengths of duct pieces are based on actual tests
and reflect requirements for good venting performance with
any vent hood.
5
EQUIVALENT
=
LENGTH
=
Ft.
=
Ft.
=
Ft.
=
Ft.
=
Ft.
=
Ft.
=
Ft.
=
Ft.
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Ft.
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