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TABLE 2. DUCTWORK INSTALLATION GUIDELINES
For safety reasons, ducting should vent directly outdoors (not into an attic, underneath the house, into the
garage or into any enclosed space).
Keep duct runs as short and straight as possible.
Duct fittings (elbows and transitions) reduce air flow efficiency.
Back to back elbows and „S“ turns give very poor delivery and are not recommended.
A short straight length of duct at the inlet of the remote blower gives the best delivery.
Transition to duct from the integral blower or remote duct transition as close to the downdraft as is pos-sible.
In order of preference, use
1st. 10" round duct
2nd. 8" round duct
3rd. 3-1/4" x 14" duct
4th. 7" round duct
5th. 3-1/4" x l0" duct
6th. 6" round duct
The use of flexible metal round duct should only be used when no other duct fitting exists. Limit use to short
lengths and do not crush when making corners.
12"
11"
3-9/16"
23-1/16"
1-7/8"
6-1/4"
12"
Hood Width
Rear
Wall
1-1/2" Dia. Holes
Vertical conduit
option
2-3/4"
Cabinet Front
10"
2-1/2"
4-15/16"
CL
Vertical
Discharge
Bottom of
Cabinet or
Soffit
1-7/8"
12"
Hood Width
Rear
Wall
1-1/2" Dia. Holes
Vertical conduit
option
2-3/4"
Cabinet Front
CL
Bottom of
Cabinet or
Soffit
Horizontal
Discharge
7/16"
7/16"
Ø 8 1/4"
Ø 8 1/4"
8 13/16"
Figure 3
Figure 1
Figure 2
•
After having choosen the vent option
:
1.
Prepare duct and conduit cut outs, see
Fig.1,2,3 as needed.
