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7
Venting Requirements
•
Vent system must terminate to the outdoors.
• Do not terminate the vent system in an attic or
other enclosed area.
• Do not use 4” (10.2 cm) laundry-type wall caps.
• Use metal vent only. Rigid metal vent is
recommended. Plastic or metal foil vent is not
recommended.
• The length of vent system and number of elbows
should be kept to a minimum to provide efcient
performance.
For the most efcient and quiet operation:
• Use no more than three 90° elbows.
• Make sure there is a minimum of 24” (61.0 cm) of
straight vent between the elbows if more than 1
elbow is used.
• Do not install 2 elbows together.
• Use clamps to seal all joints in the vent system
and use furnace duct tape to fully seal joint
connection.
• Use caulking to seal exterior wall or roof opening
around the cap.
• The size of the vent should be uniform.
Cold weather installations
An additional back draft damper should be installed
to minimize backward cold air ow as part of the vent
system.
A thermal break should be installed to minimize con-
duction of outside temperatures 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 specied CFM of air movement. The specied
CFM varies from locale to locale.
Consult your HVAC professional for specic require-
ments in your area.
Venting Requirements
Venting Methods
Vent Exhaust Option
The hood is designed for vertical or horizontal
discharge.
• Vertical discharge: Use a 3
1
⁄4” x 10” rectangular
duct.
• Horizontal discharge: Use a 3
1
⁄4” x 10” rectangular
duct.
NOTE: Flexible vent is not recommended.
Flexible vent creates back pressure and air
turbulence that greatly reduce performance.
Vent system can terminate either through the
roof or wall. To vent through the wall, a 90° elbow
is needed.
Vertical
Discharge
Horizontal
Discharge
Preparation
Do not cut a joist or stud unless absolutely necessary.
If a joist or stud must be cut, then a supporting frame
must be constructed.
Fittings material is provided to secure the hood to
most types of walls/ceilings.
However, a qualied technician must verify suitability
of the materials in accordance with the type of wall/
ceiling.
Before making cutouts, make sure there is proper
clearance within the ceiling or wall for exhaust vent.
Hood installation height above cooktop is the users
preference. The lower the hood is above the cooktop,
the more efcient the capturing of cooking odors,
grease and smoke.
CAUTION:
Mount this hood so that the bottom edge is at 30”
(76.2 cm) minimum or 36”(91.4 cm) maximum above
the cooking surface. Household use, please, read
installation manual for specic application.
Check your ceiling height and the hood height maxi-
mum before you select your hood.
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