To calculate the length of the system you need, add the equivalent feet (meters) for each vent piece used in the system.
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) | 0.0 ft |
wall cap | (0.0 m) |
|
|
3¹⁄₄" x 10" (8.3 cm x 25.4 cm) | 4.5 ft |
to 6" (15.2 cm) transition | (1.4 m) |
|
|
6" (15.2 cm) to 3¹⁄₄" x 10" | 1 ft |
(8.3 cm x 25.4 cm) transition | (0.3 m) |
|
|
3¹⁄₄" x 10" (8.3 cm x 25.4 cm) | 5.0 ft |
to 6" (15.2 cm) 90° elbow | (1.5 m) |
transition |
|
|
|
6" (15.2 cm) to 3¹⁄₄" x 10" | 5.0 ft |
(8.3 cm x 25.4 cm) 90° elbow | (1.5 m) |
transition |
|
Example Vent System
C
6 ft
(1.8 m) 
A B
2 ft (0.6 m)
D
A. Blower motor
B.Transition
C.90° elbows
D.6" backdraft damper (supplied)
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.
A
C
B
A. Overcounter support bracket
B. Blower motor box
C. Overcounter support bracket screw
8
