GE PV977NSS - Manual (Page 13)

49-80550-2
13
Plan the Location of the Hood and Ductwork
• Use a plumb bob to check the location.
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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
Installation Preparation
Top view – ceiling joists parallel to front of hood
16” Joist
spacing
µ
8” Duct
Front
of
hood
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
Ceiling
Hood
ducting
centerline
Cooktop
Countertop
µ
Side view
Align with
center of
cooktop
Install cross-framing symmetrically
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µ
µ
µ
Duct covers