10
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.
STEP 1 CONSTRUCT CEILING SUPPORT
Installation Instructions
Ceiling
Hood
Ducting
Centerline
42" Hood Side View
Align With
Center of
Cooktop
Cooktop
Countertop
31-1/2"
Front 15-3/4"
Top View – Ceiling Joists Parallel to Front of Hood
12-3/4” (42” Hood) 17”
(54” Hood) Install Cross-
Framing Symmetrically
About Duct/Cooktop
Centerline
16” Joist
Spacing
8 5/8”10” Duct
Front
of
Hood
2x4 Cross
Framing
Cooktop
Outline
Align duct
to center of
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.
EXAMPLE A