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9
Installation Preparation
Plan the Location of the Hood and Ductwork
• Use a plumb bob to check the location.
The countertop/cooktop below the hood
must be centered with the hood.
• The hood should extend beyond the front and rear
edge of the cooking appliance.
• The duct in the ceiling must be centered over
the cooktop.
CONSTRUCT CEILING SUPPORT
Top view – ceiling joists parallel to front of hood
16" Joist
spacing
8-3/4"
6" Duct
Front
of
hoo
d
2x4 Cross-framing
wood supports
Cooktop
outline
Align duct
to center
of cooktop
Ceiling Support Structure
• At the hood location, install cross-framing between
ceiling joists as shown. (2x4 wood supports
are required to support the weight of the hood.)
• Arrange cross-framing in the ceiling to suit
the existing structure.
• Your ceiling joists will be like one of the following
examples.
EXAMPLE A
Align with
center of
cooktop
Install cross-framing symmetrically over
duct/cooktop centerline
7-5/8"
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