GE ZV925SLSS - Manual (Page 11)

Ceiling
Joist
10-3/4
2x 4 Min.
Cross Framing
Height
Adjustment
Screw Holes
7-1/16"
11
CONSTRUCT CEILING SUPPORT
CONTINUED
Installation Preparation
Ductwork for Installations Vented to the Outdoors
• Use the shortest and straightest duct route possible.
For satisfactory performance, duct run should not
exceed 100 feet equivalent length for any duct
configuration.
• Refer to “Duct Fittings” chart to compute the
maximum permissible length for duct runs to the
outdoors.
• This vent hood must use 8" round rigid duct.
• Install the house ductwork to run horizontally
between ceiling joists or straight up through the
roof.
Finish the Ceiling
• Finish the ceiling surface. Be sure to mark location
of the ceiling joists and cross framing. Check to be
sure the ceiling is level; use shims if necessary.
Ceiling Joint
2x4
10"
Duct
Vent Straight Up
Through The Ceiling
• Secure each 2 x 4 block with at least four (4), #10
wood screws, 3" long (not supplied). Use 8 wood
screws total for the two supports.
• The cross framing must be accurately aligned to
assure correct positioning of the hood.
• The cross framing must be level in all directions.
Check with a spirit level and adjust if necessary.
IMPORTANT: The ceiling structure must be capable
of supporting the weight of the hood (approximately
200 pounds) and any inadvertent user contact loads.
The hood support frame will be supported by the
2 x 4 cross framing.
2 x 4 min.
cross framing
Ceiling
joist
7-1/16"
8"
Duct
Ceiling joist
2 x 4
Vent straight up
through the ceiling
10-1/16"
Height
adjustment
screws