Venting Methods - KitchenAid KWCU380JSS1 Installation Instructions And Use And Care Manual

Venting methods
This canopy range hood is factory set for
vertical venting. For rear vent applications, the
blower must be turned inside the range hood so
that the blower vents to the rear as indicated.
The blower is turned by removing two screws
on each side of the blower, rotating the blower
with the exhaust opening facing the rear and
then replacing the screws. The exhaust cover(s)
must be moved to block the unused opening(s).
The blower must be converted before installing
the range hood.
Vent system needed for installation is not
included. The 30" (76.2 cm), 36" (91.4 cm) and
42" (106.7 cm) models have one exhaust
opening. 3-1/4" x 10" (8.3 cmx 25.4 cm)
rectangular, 7" (17.8cm) round, 8" (20.3 cm)
round, 9" (22.9 cm) round, or 10" (25.4 cm)
round vent may be used.The hood exhaust
opening is 3-1/4" x 10" (8.3 cmx 25.4 cm).
The 48" (121.9 cm) model has two 3-1/4" x 10"
(8.3 cm x 25.4 cm) exhaust openings. It is
recommended that VentTransition Kit No.
8284757 be used to transition the two openings
into one 10" (25.4 cm) round vent. (Cannot be
used with Chimney Extension Kit No. 8284754.)
Vent system can terminate either through the
roof or wall.
The vent system length should not exceed the
lengths shown in the chart.
Vertical venting
reef cap
3-1/4" × 10" __
(8.3cm × 25.4 cm}_1 ['_ _-_-_-.
vertical venting _ . -_._._
(roof or wall}
_ _
Horizontal venting
3-1/4" x 10"
(8.3 cm x 25.4 cm)
horizontal venting
wall cap
Vent size Maximum length
3-1/4" x 10" (8.3 cm x 25.4 cm) 35 ft. (10.7 m)
7" (17.8cm) round 40 ft. (12.2 m)
8" (20.3 cm) round 50 ft. (15.2 m)
9" (22.9 cm) round 60 ft. (18.3 m)
10" (25.4 cm) round 60 ft. (18.3 m)
Calculating the vent system length
To calculate the length of the system you need, add the equivalent feet (meters)
for each vent piece used in the system.
Vent Piece
45° elbow
90° elbow
90° flat elbow
transition to round
wall cap
3-1/4" x 10" (8.3 cm x 25.4 cm)
Rectangular
7.0feet
(2.1 m)
5.0 feet
(1.5 m)
12.0 feet
(3.7 m)
5.0 feet
(1.5 m)
0.0 feet
(0.0 m)
7" {17.8cm}, 8" (20.3 cm),
9" (22.9 cm), 10" (25.4 cm)
Round
2.5 feet
(0.8 m)
5.0 feet
(1.5 m)
Example for 3-1/4" x 10"
(8.3 cmx 25.4 cm} vent system
3-1/4" x 10" wamm
(8,3 cmx 25,4 cm) cap
(
Maximum length = 35 ft. (10.7 m}
1 -90 ° elbow = 5ft. (1.5m)
8 ft. (2.4 m) straight = 8 ft. (2.4 m)
1 -wallcap = 0ft. (0m)
Length of 3-1/4" x 10"
(8.3 cmx 25.4 cm)
system = 13 ft. (3.9 m)
Note: Flexible vent is Not
recommended.
Flexible vent creates back pressure
and air turbulence that greatly
reduces performance.