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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
6" (15.2 cm)
wall cap
3¹⁄₄" x 10" (8.3 cm x 25.4 cm)
to 6" (15.2 cm) transition
6" (15.2 cm) to 3¹⁄₄" x 10"
(8.3 cm x 25.4 cm) transition
3¹⁄₄" x 10" (8.3 cm x 25.4 cm)
to 6" (15.2 cm) 90° elbow
transition
6" (15.2 cm) to 3¹⁄₄" x 10"
(8.3 cm x 25.4 cm) 90° elbow
transition
Example Vent System
C
B
A
D
A. Blower motor
B. Transition
C. 90° elbows
D. 6" backdraft damper (supplied)
6" (15.2 cm) Round
2.5 ft
(0.8 m)
5.0 ft
(1.5 m)
0.0 ft
(0.0 m)
4.5 ft
(1.4 m)
1 ft
(0.3 m)
5.0 ft
(1.5 m)
5.0 ft
(1.5 m)
6 ft
(1.8 m)
2 ft (0.6 m)
The following example falls within the maximum vent length of
35 ft (8.9 m).
2 - 90° elbow
= 10.0 ft (3 m)
1 - wall cap
= 0.0 ft (0.0 m)
8 ft (2.4 m) straight
= 8.0 ft (2.4 m)
Transition
= 4.5 ft (1.4 cm)
Length of 6" (15.2 cm)
= 22.5 ft (6.8 m)
system
Install Vent System
WARNING
Excessive Weight Hazard
Use two or more people to move and install
downdraft vent.
Failure to do so can result in back or other injury.
1. Place cardboard or similar material on top of a flat surface
where you can easily assemble the downdraft vent system.
2. Remove parts packages, downdraft vent and blower box
from the carton.
3. Remove all shipping materials, tape and film from the
downdraft vent and blower box.
4. Remove screws from each side of the vent. Attach the left
and right side overcounter support brackets to the downdraft
vent and push up to align the screw holes. Use screws to
secure the brackets.
B
A. Overcounter support bracket
B. Blower motor box
C. Overcounter support bracket screw
A
C
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