Venting Requirements
■Vent system (if needed) for installation is not included.
■Vent system must terminate to the outside.
■Do not terminate the vent system in an attic or other enclosed area.
■Do not use 4" (10.2 cm)
■Use metal vent only. Rigid metal vent is recommended. Do not use plastic or metal foil vent.
For the most efficient and quiet operation:
■The length of the vent system and number of elbows should be kept to a minimum to provide efficient performance. The size of the vent system should be uniform.
■Do not install two elbows together.
■Vent system can terminate either through the roof or wall.
■For the most efficient and quiet operation, it is recommended that the range be vented vertically through the roof through 7" (17.8 cm) round vent system.
■Use duct tape to seal all joints in the vent system.
■Use caulking to seal exterior wall or roof opening around the cap.
Venting Methods
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.
Use 3¹⁄₄" x 10" (8.3 x 25.4 cm) or 7" (17.8 cm) round vent with a maximum length of 65 feet (19.8 m) for vent system. For best performance, use no more than three 90° elbows. To calculate the length of system you need, add the equivalent feet for each vent piece used in the system. See the examples below.
3-1/4" x 10" (8.3 x 25.4 cm) vent system
Recommended standard fittings
Vent piece | 3¹⁄₄" x 10" (8.3 x 25.4 cm) |
3¹⁄₄" x 10" | 5 feet |
(8.3 x 25.4 cm) | (1.5 m) |
90° elbow |
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3¹⁄₄" x 10" | 12 feet |
(8.3 x 25.4 cm) | (3.7 m) |
flat elbow |
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3¹⁄₄" x 10" | 0 feet |
(8.3 x 25.4 cm) | (0 m) |
wall cap |
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Determine which outside venting method needs to be used. It is recommended that the vent system be installed before installing the hood.
NOTE: If a
(8.3 x 25.4 cm) elbow 
wall cap |
6 ft. (1.8 m) |
Example vent |
system |
7" (17.8 cm) round
or
through roof
Round vent: Use 7" (17.8 cm) round damper (purchased separately)
7" (17.8 cm) |
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round |
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or |
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(8.3 x 25.4 cm) |
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through the wall |
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wall | ||
(8.3 x 25.4 cm) | ||
cap | ||
through the wall | ||
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2ft.
(0.6 m)
1 | — 90° elbow | = | 5 ft. | (1.5 m) |
8 ft. (2.4 m) straight | = | 8 ft. | (2.4 m) | |
1 | — wall cap | = | 0 ft. | (0 m) |
system length | = | 13 ft. | (3.9 m) | |
24" (61 cm) to 30" (76.2 cm) above cooking surface
24" | (61 cm) to |
30" | (76.2 cm) |
above cooking | |
surface | |
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7" (17.8 cm) vent system
Recommended standard fittings
Vent piece | 7" (17.8 cm) round | Vent piece | 7" (17.8 cm) round |
45° elbow | 2.5 feet | 3¹⁄₄" x 10" | 4.5 feet |
| (0.8 m) | (8.3 x 25.4 cm) | (1.4 m) |
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| to 7" (17.8 cm) |
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90° elbow | 5.0 feet |
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| (1.5 m) |
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Roof venting | Wall venting |
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| 3¹⁄₄" x 10" | 5 feet | |
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| (8.3 x 25.4 cm) | (1.5 m) | |
7" (17.8 cm) | 0 feet | |||||
to 7" (17.8 cm) |
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wall cap | (0 m) |
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90° elbow |
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90° elbow |
| 6 ft. (1.8 m) |
| wall cap |
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| Example vent | ||
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| system | |
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| 1 | — 90° elbow | = | 5 ft. | (1.5 m) | |
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2 | ft. |
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(0.6 m) |
| 1 | — wall cap | = | 0 ft. | (0 m) | |||
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| 8 ft. (2.4 m) straight | = | 8 ft. | (2.4 m) | ||
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| system length | = | 13 ft. | (3.9 m) | ||
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