49-80329 Rev. 5
9
Installation Preparation
CONSTRUCT CEILING SUPPORT
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.
Ceiling Support Structure
■ At the hood location, install 2 x 4 cross framing
between ceiling joists as shown. (2x4’s 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.
Ceiling
Hood ducting
centerline
Cooktop
Countertop
Front
27-9/16"
13-3/4"
Side view
Align with center
of cooktop
Top view – ceiling joists parallel to front of hood
10-1/16"
Install cross-framing
symmetrically over duct/
cooktop centerline
16" joist
spacing
7-1/16"
8” duct
Front
of
hood
2x4 cross
framing
Cooktop
outline
Align duct to
center of cooktop
EXAMPLE A
1” = 2.5 cm; 1’ = 0.3 m