Venting Requirements - Whirlpool Custom Series Installation Instructions Manual

Venting
requirements
Venting system must terminate to
the outside.
Do not terminate the vent in an
attic or other enclosed space.
Do not use four-inch laundry-type
wall caps.
Do not use plastic vent.
Vent system needed for
installation is not included.
Backdraft damper supplied with
product must be used. If roof or
wall cap has a damper, do not
use damper supplied with hood.
Use metal vent only. Rigid metal
vent is recommended.
Determine which outside venting
method you need to use.
The length of the vent and
number of elbows should be kept
to a minimum to provide efficient
performance. The size of the vent
should be uniform. Do Not install
two elbows together. Use duct
tape to seal all joints in the vent
system. Vent can terminate either
through the roof or wall. Use
caulking to seal exterior wall or
roof opening around exhaust
hood. For the most efficient and
quiet operation, it is
recommended that the range
hood be vented vertically
through the roof using 7" (17.8 cm)
round vent.
Figures 1-4 show common venting
methods and what types of
materials are needed.
Page 4
Vertical roof venting
7" (17.8 cm)
round
through roof
damper located
as far from hood
as possible
66"
(167.6 cm)
Figure 1
3-1/4" x 10"
(8.3 x 25.4 cm)
through the roof
66"
(167.6 cm)
Figure 2
Horizontal wall venting
3-1/4" x 10"
(8.3 x 25.4 cm)
through the wall
66"
(167.6 cm)
Figure 3
roof cap
7" (17.8 cm) min.
diameter round
vent
elbows
3-1/4" x 10"
(8.3 x 25.4 cm) to
round vent transition
Figure 4
Recommended vent length
roof cap
Use 3-1/4" x 10" (8.3 x 25.4 cm) or
7" (17.8 cm) vent with a maximum
length of 26 feet (7.9 m) for vent
system. For best performance, use
no more than three 90° elbows. To
calculate the length of system
you need, add the equivalent
feet for each vent piece used in
the system. See the following
3-1/4" x 10"
examples.
(8.3 x 25.4 cm)
to 7" (17.8 cm)
fitting required
for some
models
3-1/4" x 10" (8.3 x 25.4 cm)
vent system
3-1/4" x 10"
(8.3 x 25.4 cm)
elbow
roof cap
3-1/4" x 10"
(8.3 x 25.4 cm)
damper
Maximum length
1 - 90° elbow
8 ft. (2.4 m) straight = 8 ft. (2.4 m)
1 - wall cap
Length of 3-1/4" x
10" (8.3 x 25.4 cm)
system
Recommended standard
fittings
wall cap
wall cap
wall cap
6 ft. (1.8 m)
2 ft. (0.6 m)
= 26 ft. (7.9 m)
= 5 ft. (1.5 m)
= 0 ft. (0 m)
= 13 ft. (4 m)
3-1/4" x 10"
(8.3 x 25.4 cm) 90°
elbow = 5 ft. (1.5 m)
3-1/4" x 10"
(8.3 x 25.4 cm) flat
elbow = 12 ft. (3.7 m)
3-1/4" x 10"
(8.3 x 25.4 cm)
wall cap = 0 ft. (0 m)