5
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) laundry-type wall caps.
■ 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
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 non-vented (recirculating) installation is desired, follow
instructions in the “Make Electrical Connection” section.
Roof venting
Wall venting
7" (17.8 cm) round
or 3-1/4" x 10"
(8.3 x 25.4 cm)
through roof
roof cap
24" (61 cm) to
30" (76.2 cm)
above cooking
surface
Round vent:
Use 7" (17.8 cm)
round damper
(purchased
separately)
wall
cap
3-1/4" x 10"
(8.3 x 25.4 cm)
through the wall
7" (17.8 cm)
round
or 3-1/4" x 10"
(8.3 x 25.4 cm)
through the wall
24" (61 cm) to
30" (76.2 cm)
above cooking
surface
90° elbow
wall cap
1 — 90° elbow = 5 ft. (1.5 m)
1 — wall cap = 0 ft. (0 m)
8 ft. (2.4 m) straight = 8 ft. (2.4 m)
system length = 13 ft. (3.9 m)
6 ft. (1.8 m)
2 ft.
(0.6 m)
Example vent
system
Vent piece 7" (17.8 cm) round
45° elbow 2.5 feet
(0.8 m)
90° elbow 5.0 feet
(1.5 m)
7" (17.8 cm) 0 feet
wall cap (0 m)
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
7" (17.8 cm) vent system
Recommended standard fittings
Recommended standard fittings
Vent piece 7" (17.8 cm) round
3¹⁄₄" x 10"
4.5 feet
(8.3 x 25.4 cm)
(1.4 m)
to 7" (17.8 cm)
3¹⁄₄" x 10"
5 feet
(8.3 x 25.4 cm)
(1.5 m)
to 7" (17.8 cm)
90° elbow
3-1/4" x 10"
(8.3 x 25.4 cm)
elbow
wall cap
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 pages)
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