Vent Piece 3-1/4" x 10" (8.3 cm x 25.4 cm) 7" (17.8 cm),8" (20.3 cm),
Rectangular 9" (22.9 cm), 10" (25.4 cm)
Round
45° elbow 7.0 feet 2.5 feet
(2.1 m) (0.8 m)
90° elbow 5.0 feet 5.0 feet
(1.5 m) (1.5 m)
90° flat elbow 12.0 feet
(3.7 m)
transition to round 5.0 feet
(1.5 m)
wall cap 0.0 feet
(0.0 m)
4
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 cm x 25.4 cm)
rectangular, 7" (17.8 cm) 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 cm x 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 Vent Transition 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.
Vent size Maximum length
3-1/4" x 10" (8.3 cm x 25.4 cm) 35 ft. (10.7 m)
7" (17.8 cm) 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)
3-1/4" x 10”
(8.3 cm x 25.4 cm)
elbow
wall
cap
Maximum length = 35 ft. (10.7 m)
1 — 90° elbow = 5 ft. (1.5 m)
8 ft. (2.4 m) straight = 8 ft. (2.4 m)
1 — wall cap = 0 ft. (0 m)
Length of 3-1/4" x 10"
(8.3 cm x 25.4 cm)
system = 13 ft. (3.9 m)
6 ft.(1.8 m)
2 ft.
(0.6 m)
Example for 3-1/4" x 10"
(8.3 cm x 25.4 cm) v
ent system
To calculate the length of the system you need, add the equivalent feet (meters)
for each vent piece used in the system.
Note: Flexible vent is Not
recommended.
Flexible vent creates back pressure
and air turbulence that greatly
reduces performance.
Calculating the vent system length
3-1/4" x 10"
(8.3 cm x 25.4 cm)
vertical venting
(roof or wall)
roof cap

Horizontal venting

3-1/4" x 10"
(8.3 cm x 25.4 cm)
horizontal venting
wall cap

Vertical venting