5
Ducting
Hy-Ex Ventilator - Exterior Venting
NOTES
1. It is recommended to have the range
hood on site before determining the ter-
minal position of the duct ‘stub’. Before
measuring, attach backdraft damper to
exhaust outlet.
2. In
cold climates, insulate the ductwork
in cold spaces to prevent moisture con-
densation in the winter, which can run
down the ductwork, into the hood below.
A thermal break may be required.
Ceiling
Liner
Liner
Exhaust Outlet
Hy-Ex Remote Ventilator
Use proper size round ducting.
1000 CFM requires 8” (50 sq. in.)
1400 CFM requires 10” (78 sq. in.)
Duct ‘Stub’
From Ceiling
Hood Shell
1”
Top View
Duct Positioning
Wall Side
Duct Location
Wall Side
Wall hoods with stack
against wall
Wall hoods with
stack centered
(Luna and Quantum models)
Duct Location
Duct Location
Island Hoods
Duct centered front to rear
Backdraft
Damper
Proper ductwork installation will al-
low ventilator to efficiently move air from
hood to outside the building. Use smooth
galvanized ductwork with a minimum num-
ber of elbows and bends. All joints must be
sealed and run upstream. Ceiling ductwork
should “stub down”, cut to length, to mate
with backdraft damper of installed liner (see
illustration).
Ductwork is not provided with hood.
