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Pre-Installation (continued)
FOLLOW THESE GUIDELINES WHEN INSTALLING DUCT WORK:
- 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) .
- Calculate the total effective length of the duct work 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 duct work 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 458 mm (18 in) of straight vent between each elbow. Install
first 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 102 mm (4 in) laundry-type wall caps. Use caulking to
seal exterior wall or roof opening around the cap .
- The venting system must have a damper . If the roof or wall cap has a damper, do not use the damper supplied with the range hood .
Horizontal Wall Venting
Fig .5
In an interior venting system air is not exhausted outdoors (Fig. 8). Instead, air passes through the aluminum and charcoal filters and is
recirculated indoors through the top vent of the range hood (17) . Please refer to the Installation Section for more details .
17
QR061SS
Horizontal Wall Venting
15
13
Fig .6
Fig . 8
15
13
Equivalent Length Chart
Type of duct
45° Elbow
90° Elbow
90° Flat elbow
2.74 m (9 ft) Straight duct
Wall cap
8
Vertical Roof Venting
16
14
Fig .7
Length added
0.91 m (3 ft)
1 .52 m (5 ft)
3 .66 m (12 ft)
2.74 m (9 ft)
0 m (0 ft)
Fig. 9
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