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INSTALLING THE DUCTWORK:
INTERNAL BLOWER
NOTE: To reduce the risk of fire, use only
rigid metal ductwork.
1. Decide where the ductwork will run
between the hood and the outside.
2. A straight, short duct run using a minimum
6” round duct for single internal blower and
10” round duct for the dual internal blower
will allow the hood to perform most efficiently.
3. Long duct runs, elbows, and transitions will
reduce the performance of the hood. Use
as few of them as possible.
4. Install a roof cap. Connect round metal
ductwork to cap and work back towards
hood location. Use duct tape to seal the
joints between ductwork sections (Fig.4).
5. Choose blower outlet position desired. Blower
oulet options are from top, side or front of blower
housing. FIG. 5
FIG. 4
30” to 72”
above cooking
surface
ROOF CAP
6” or 10”
round duct *
* 6” : hood with single internal blower
* 10” : hood with dual internal blower
FIG. 6
30” to 72”
above cooking
surface
6” round duct
AIR
RETURN
VENT
Optional Recirculating Kit
Air return vent must be a minimum of 6 feet from hood
Recirculating Kit ZRC-01LX is only compatible
with single internal blower models CBI-600A and
CBI-290A.
FIG. 5
6. Non-ducted recirculating only. 6” round ducting
must be connected from a single internal blower
to the air return vent. FIG. 6
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