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
This range hood is factory set for venting through the roof or through the wall.
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.
Roof Venting | Wall Venting |
B
Example vent system
3¹⁄₄" x 10" (8.3 cm x 25 cm)
Wall cap
90˚ elbow
6 ft (1.8 m)
3ft
(0.93 m)
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) | |
A
A
B
System length | = 14 ft (4.3 m) |
If it is not possible to vent cooking fumes and vapors to the outside, the range hood can be used in the
A B C
D
A. 3¹⁄₄" x 10" (8.3 cm x 25 cm) | A. 3¹⁄₄" x 10" (8.3 cm x 25 cm) |
vent through the roof | vent through the wall |
B. Roof cap | B. Wall cap |
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.
Vent Piece | 3¹⁄₄" x 10" (8.3 cm x 25 cm) |
3¹⁄₄" x 10" (8.3 cm x 25.4 cm) | 5.0 ft |
90° elbow | (1.5 m) |
|
|
3¹⁄₄" x 10" (8.3 cm x 25.4 cm) | 12.0 ft |
flat elbow | (3.7 m) |
|
|
3¹⁄₄" x 10" (8.3 cm x 25.4 cm) | 0.0 ft |
wall cap | (0.0 m) |
|
|
A. 3¹⁄₄" x 10" (8.3 cm x 25 cm) vent B. 3¹⁄₄" x 10" (8.3 cm x 25 cm) elbow C. Vent cover
D. Soffit
D | E |
C |
|
B |
|
A |
|
A. Range hood | D. Vent cover |
B. Vent system | E. Ceiling or soffit |
C. Top of cabinet |
|
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