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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.
Example Vent System
The following example falls within the maximum vent length of
35 ft (8.9 m).
Install Vent System
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. Install the right and left undercounter mounting brackets to
the vent box. Slide the keyhole slots over the guide tabs and
push the brackets up to set them into place.
Vent Piece
3¹⁄₄" x 10" (8.3 cm x 25.4 cm)
Rectangular
3¹⁄₄" x 10" (8.3 cm x 25.4 cm)
90° elbow
5.0 ft
(1.5 m)
3¹⁄₄" x 10" (8.3 cm x 25.4 cm)
flat elbow
12.0 ft
(3.7 m)
3¹⁄₄" x 10" (8.3 cm x 25.4 cm)
wall cap
0.0 ft
(0.0 m)
Vent Piece 6" (15.2 cm) Round
45° elbow 2.5 ft
(0.8 m)
90° elbow 5.0 ft
(1.5 m)
6" (15.2 cm)
wall cap
0.0 ft
(0.0 m)
3¹⁄₄" x 10" (8.3 cm x 25.4 cm)
to 6" (15.2 cm) transition
4.5 ft
(1.4 m)
6" (15.2 cm) to 3¹⁄₄" x 10"
(8.3 cm x 25.4 cm) transition
1 ft
(0.3 m)
3¹⁄₄" x 10" (8.3 cm x 25.4 cm)
to 6" (15.2 cm) 90° elbow
transition
5.0 ft
(1.5 m)
6" (15.2 cm) to 3¹⁄₄" x 10"
(8.3 cm x 25.4 cm) 90° elbow
transition
5.0 ft
(1.5 m)
A.Blower motor
B. Transition
C. 90° elbows
D. Back draft damper
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) or 3¹⁄₄" x 10"
(8.3 cm x 25.4 cm) system
= 22.5 ft (6.8 m)
A. Vent box
B. Undercounter mounting bracket
C. Keyhole slots
D. Guide tabs
A
B
C
6 ft
(1.8 m)
2 ft (0.6 m)
D
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.
B
C
D
A