Installation Guide

EQUI
VALENT
NUM
BER
EQUI
VALENT
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) x (1) = 12 Ft. (3.6 m)
12 Ft. (3.6 m) Straight
Duct (6"/15.2 cm Round)
5 Ft. (1.5 m) x (1) = 5 Ft. (1.5 m)Rectangular-to-Round
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. (12.5 m)
The
fo
l
lowing chart describes an example of one
possible ductwork installation.
OUTSIDE TOP EXHAUST (EXAMPLE
ONLY)
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.
* 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.
The following chart describes an example of one
possible ductwork installation.
Installation Instructions
OUTSIDE BACK EXHAUST (EXAMPLE ONLY)
EQUIVALENT NUM
BER
EQUI
VALENT
DUCT PIECES LENGTH* x USED = LENGTH
Wall Cap 40 Ft. (12.2 m) x (1) = 40 Ft. (12.2 m)
3 Ft. (0.9 m) x (1) = 3 Ft. (0.9 m)
90° Elbow 10 Ft. (3 m) x (2) = 20 Ft. (3 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. (19.2 m)
EXT
ERNA
L EXHAUST DUCTING
EN-15
3 Ft. Straight Duct
(3
1
⁄4
" x 10 "/8.2 x 25.4 cm
Rectangular)