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EQUIVALENT NUM BER EQUIVALENT
DUCT PIECES LENGTH x USED = LENGTH
Roof Cap 24 Ft. (7.3 m) x (1) = 24 Ft. (7.3 m)
12 Ft. (3.6 m) Straight Duct 12 Ft. (3.6 m) x (1) = 12 Ft. (3.6 m)
(6” /15.2 cm Round)
Rectangular-to-Round 5 Ft. (1.5 m) x (1) = 5 Ft. (1.5 m)
Transition Adaptor*
Equivalent lengths of duct pieces are based on actual tests and
reflect requirements for good venting performance with any vent hood.
Total Length = 41 Ft. (12.4 m)
Th e following chart describes an example of on e possible
ductwork in stallation.
OUTSIDE TOP EXHAUST (EXAM PLE ONLY)
NOTE: For back exhaust, care should be taken to align exhaust with space between studs, or wall should be prepared
at th e time it is con structed by leaving enough space between the wall studs to accommodate exh aust.
* IMPORTANT: If a rectan gular-to-roun d transition adaptor is used, th e bottom corn ers of th e damper
will have to be cut to fit, using th e tin snips, in order to allow free movemen t of the damper.
Th e following chart describes an example of on e possible
ductwork in stallation.
Installation Instructions
OUTSIDE BACK EXHAUST (EXAM PLE ONLY)
EQUIVALENT NUM BER EQUIVALENT
DUCT PIECES LENGTH* x USED = LENGTH
Wall Cap 40 Ft. (12.2 m) x (1) = 40 Ft. (12.2 m)
3 Ft. Straight Duct 3 Ft. (0.9 m) x (1) = 3 Ft. (0.9 m)
(3
1
⁄4” x 10” / 8.2 x 25.4 cm
Rectangular)
90° Elbow 10 Ft. (3 m) x (2) = 20 Ft. (6 m)
Equivalent lengths of duct pieces are based on actual tests and
reflect requirements for good venting performance with any vent hood.
Total Length = 63 Ft. (19.1 m)
EXTERNAL EXHAUST DUCTING
EN-11
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