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Pre-Installation (continued)
GUIDELINES FOR INSTALLING DUCTWORK:
□ Your venting system must vent to the outdoors either horizontally through the back wall (13) or vertically through the roof (14) (refer to
Fig 5/Fig 6/ Fig 7).
□ Use round metal ductwork with a uniform diameter of 7 in. (177 mm). The total duct run in the venting system should not be more than
35 ft (10.7 m).
□ Calculate the total effective length of the ductwork by adding the equivalent lengths in the table shown (Fig 9). For each fitting used add
the length of the equivalent straight duct used in the system.
□ Fasten all connections between pieces of duct with sheet metal screws and tape all joints with certified duct tape.
□ If you must turn the path of the ductwork using elbows, keep the number of elbows to a minimum for effective performance and use no
more than three 90° elbows. Ensure that there is a minimum of 18 in. (458 mm) of straight vent between each elbow. Elbow as far away
from the range hood's exhaust opening as possible.
□ Cap the exterior of the duct with a wall cap (15) or roof cap (16). Never use 4 in. (102 mm) laundry-type wall caps. Use caulking to seal
exterior wall or roof opening around the cap.
□ The venting system must have a damper.
□ For this option, convert filter (see Charcoal / Grease Filter in the Care and Cleaning section).
Horizontal Wall Venting
Fig. 5
□ For interior venting system (air does not exhaust to outdoors) (Fig 8):
□ In interior vented installations, air is recirculated through a charcoal filter (included) and exhausted through the top of the range hood (17).
See the installation section for more details.
17
15
13
Fig. 8
Horizontal Wall Venting
15
13
Fig. 6
Type of duct
45° Elbow
90° Elbow
90° Flat elbow
9 ft (2.74 m) Straight duct
Wall cap
8
Vertical roof Venting
Fig. 7
Equivalent Length Chart
3 ft (0.91 m)
5 ft (1.52 m)
12 ft (3.66 m)
9 ft (2.74 m)
0 ft (0 m)
Fig. 9
16
14
Length added
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