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EXTERNAL EXHAUST DUCTING
OUTSIDE TOP EXHAUST (EXAMPLE ONLY)
The following chart describes an example of one possible
ductwork installation.
DUCT PIECES
Equivalent lengths of duct pieces are based on actual tests and
reflect requirements for good venting performance with any vent hood.
* 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 describes an example of one possible
ductwork installation.
DUCT PIECES
Equivalent lengths of duct pieces are based on actual tests and
reflect requirements for good venting performance with any vent hood.
NOTE: For back exhaust, care should be taken to align exhaust with space between studs, or wall should be prepared
at the time it is constructed by leaving enough space between the wall studs to accommodate exhaust.
Installation Instructions
Roof Cap
12 Ft. (3.6 m) Straight Duct 12 Ft. (3.6 m)
(6"/15.2 cm Round)
Rectangular-to-Round
Transition Adaptor*
Wall Cap
3 Ft. Straight Duct
(3
1
⁄
" x 10"/8.2 x 25.4 cm
4
Rectangular)
90° Elbow
EQUIVALENT
LENGTH
x
24 Ft. (7.3 m)
x
x
5 Ft. (1.5 m)
x
EQUIVALENT
LENGTH*
x
40 Ft. (12.2 m)
x
3 Ft. (0.9 m)
x
10 Ft. (3 m)
x
EN-11
NUMBER
USED
=
(1)
=
(1)
=
(1)
=
Total Length
=
NUMBER
USED
=
(1)
=
(1)
=
(2)
=
Total Length
=
EQUIVALENT
LENGTH
24 Ft. (7.3 m)
12 Ft. (3.6 m)
5 Ft. (1.5 m)
41 Ft. (12.5 m)
EQUIVALENT
LENGTH
40 Ft. (12.2 m)
3 Ft. (0.9 m)
20 Ft. (3 m)
63 Ft. (19.2 m)
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