DIMENSIONS
RANGE HOOD - 36" (91.4 CM) AND 48" (121.9 CM)
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Typical In-line Blower Motor System Venting Installations
Calculating 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
Equivalent Length
45
° elbow
2.5 ft (0.8 m)
90
° elbow
5.0 ft (1.5 m)
The maximum equivalent vent lengths are:
10" (25.4 cm) round vents - 60 ft (18.3 m)
Example vent system
The following example falls within the maximum recommended vent length.
F
G
D
A
A
B
C
D
A
A
H
E
A. 10" (25.4 cm) round vent
B. Mount on top of ceiling joists.
C. Roof caps
D. Plywood (optional for some installations)
E. Mount on underside of roof rafters.
F. Mount from cross-members tied to trusses.
G. Duct horizontal; mount to cross-members tied to trusses.
H. Wall cap
90 elbow
6 ft (1.8 m)
2 ft
(0.6 m)
Wall cap
1 - 90° elbow
= 5.0 ft (1.5 m)
1 - wall cap
= 0.0 ft (0.0 m)
8 ft (2.4 m) straight
= 8.0 ft (2.4 m)
Length of system
= 13.0 ft (3.9 m)