HOOD DUCTING GUIDE
Here are some important points to consider when choosing and/or installing a range hood:
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An externally ducted range hood will generally outperform a recirculating range hood.
•
We discourage the use of flexible ducting as this has a significant negative impact on airflow and noise due to turbulence
•
caused by the ribs. Instead consider using semi-rigid or rigid duct.
•
Avoid using a narrower duct than specified as this will reduce airflow; the best performance is obtained when the range hood is
installed with a short duct with minimal bends.
•
To determine the required clearance between the cooktop and the range hood always consult the installation manual for both
the range hood and cooktop. The required clearance is the greater of the distance specified in either manual (and a minimum of
600mm between the highest point of the highest burner for gas cooktops).
•
Five metres is the recommended maximum length for ducting (see diagram 1.). When the ducting exceeds five metres in length
the installation of a TD500 or TD350 in-line motor is required, which must be placed one metre from the external vent (see
diagram 2.).
1.0m
1.0m
1.0m
90˚ Bend = 1.0m
1.0m
2.0m
1.0m
1.0m
90˚ Bend = 1.0m
3.0m
1.0m
In-line Motor - this needs to
run off a separate activation
switch to the range hood
External Vent
External Vent
Diagram 1.
Diagram 2.
