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Makeup air
Local building codes may require the use of makeup air systems
when using ventilation systems with greater than specified CFM
of air movement. The specified CFM varies from locale to locale.
Consult your HVAC professional for specific requirements in your
area.
Venting Methods
The vent system needed for installation is not included.
A 3¹⁄₄" x 10" (8.3 cm x 25 cm) rectangular vent system is
recommended.
Calculate Vent System Length
The recommended vent system length is 3¹⁄₄" x 10" (8.3 cm x
25 cm) vent with maximum length of 26 ft (8 m) for vent system.
For the best performance, use no more than three 90° elbows.
To calculate the length of the system, add the equivalent feet
(meters) for each of the vent pieces used in the system.
Example vent system
3¹⁄₄"
x 10" (8.3 cm x 25 cm)
Recommended Standard Fittings
Recirculating Vent Through the Soffit/Cabinet
This vent hood is factory set for venting through the roof or wall.
For recirculating installations, Recirculation Kit Part Number
883140 is available from the dealer or an authorized parts
distributor. Damper installation is not required.
Roof Venting Wall Venting
A. 3¹⁄₄" x 10" (8.3 cm x 25 cm)
vent through the roof
B. Roof cap
A. 3¹⁄₄" x 10" (8.3 cm x 25 cm)
vent through the wall
B. Wall cap
Maximum Length = 26 ft (8 m)
1 - 90° elbow = 5 ft (1.5 m)
1 - wall cap = 0 ft (0 m)
9 ft (2.8 m) straight = 9 ft (2.8 m)
System length = 14 ft (4.3 m)
A
B
A
B
90˚ elbow
3 ft
(0.93 m)
6 ft (1.8 m)
Wall cap
Vent Piece 3¹⁄₄" x 10" (8.3 cm x 25 cm)
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)
A. 3¹⁄₄" x 10" (8.3 cm x 25 cm) vent
B. 3
¹⁄₄" x 10" (8.3 cm x 25 cm) elbow
C. Vent cover
D. Soffit
A. Hood
B. Vent system
C. Top of cabinet
D. Vent cover
E. Ceiling or soffit
A
B
C
D
A
B
C
D
E