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DUCTWORK REQUIREMENTS
WARNING
TO REDUCE THE RISK OF FIRE, USE ONLY METAL DUCTWORK.
NOTE: Read the ductwork sections only if you do not have existing ductwork. If you have existing ductwork, skip
to the "Damage" section and proceed.
The venting system must exhaust to the outside.
This hood can be vented vertically through upper cabinets or horizontally through an outside wall. Ductwork is
not included.
Exhaust connection
This hood is designed to be vented vertically using a 7" round duct or a 3
horizontally using a 3
Duct length
The ducting from this fan to the outside of the building has a strong effect on the air flow, noise and energy use
of the fan. Use the shortest, straightest duct routing possible for best performance, and avoid installing the fan
with smaller ducts than recommended. Insulation around the ducts can reduce energy loss and inhibit mold
growth. Fans installed with existing ducts may not achieve their rated air flow.
INSULATION AND/OR CAULK AROUND THE DUCTS
Add tape to joint
8
Installation Preparation
1 4
" x 10" rectangular duct.
Add Insulation
and/or Caulk
Cabinet
Hood
1 4
" x 10" rectangular duct or
Roof Cap
Round or Rectangular Duct
Wall Cap
Add Insulation
and/or Caulk
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