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6
VENTILATION REQUIREMENTS
■ Range hoods must be ventilated to the
outdoors, except for non-vented
(recirculating) installations.
■ Do not ventilate the range hood into an
attic or other enclosed areas.
■ Do not use 4" (10.2 cm) laundry-type wall
caps.
■ The length of the range hood and the
number of elbows should be kept to a
minimum to provide maximum performance.
For the most efficient and
quiet operation
■ Use no more than three 90° elbows.
■ Make sure there is a minimum of 24" (61
cm) of straight duct between the elbows if
more than one elbow is used.
■ Do not install two elbows together.
■ Use clamps to seal all joints in the vent
system.
■ The vent system must have a damper. If
the roof or wall cap has a damper, do not
use the damper supplied with the range
hood.
■ Use caulking to seal exterior walls or roof
openings around the cap.
■ The size of the vents should be uniform.
Cold Weather Installations
An additional back draft damper should be
installed to minimize backward cold air flow.
A thermal break should be installed to
minimize conduction of outside temper-
atures as part of the vent system. The
damper should be on the cold air side of the
thermal break.
The break should be as close as possible to
where the vent system enters the heated
portion of the house.
Makeup Air
Local building codes may require the use of
makeup air systems, when using ventilation
systems greater than specified CFM of air
movement. The specified CFM varies from
state to state. Consult your HVAC
professional for specific requirements in
your area.
Venting Method
This canopy hood is factory set for through
the roof or wall.
A 6" (15.2 cm) round vent system is needed
for installation. The hood exhaust opening is
6" (15.2 cm) round.
To vent through a wall, a 90° elbow is
needed.
If exhaust ducting with a diameter of less
than 5.91” (150 mm) or if flat ducting is used,
the noise level of the range hood will
increase and extraction will be less efficient.
Rear Discharge
A 90° elbow may be installed immediately
above the hood.
For Non-Vented (recirculating)
Installations
If it is not possible to vent cooking fumes
and vapors to the outside, the hood can be
used in the non-vented (recirculating)
version, fitting a carbon filter at the motor.
Fumes and vapors are then recycled
through the top grille. DO NOT block the
chimney holes.
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