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D U C T I N G O P T I O N S
the external wall.
The method of ducting should be carefully considered before installing the extractor. The guide
below recommends the ducting components to use for all common ducting configuration -
through the top of the home (the roof and soffit) and through the external wall. Alternatively this
extractor can be operated in recirculation mode.
Top Ducting Through Roof
Side Ducting
Recirculating
NOTE: This product should be installed using 150mm ducting
(Use charcoal filtered
discs mounted either
side into the motor)
N OT E :
This product should be installed using 150mm ducting.
Extra lengths and/or bends may be required, depending on the length required and whether there
is any structural material in the run e.g. rafters.
Long duct runs, elbows, and transitions will reduce the performance of the hood. Use as few of
them as possible.
Some authorities require extractors to be vented outside. Ducted models should comply with this
requirement in every aspect.
R E C I R C U L AT I O N I N S TA L L AT I O N :
If you are unable to duct the extractor via an outlet to the outside, the exhaust pipe is only
required to help remove the air from the cabinet. We recommend this is done by ducting the air
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out of the top of the cabinet. The charcoal filters must be installed as shown on page 16.
Instruction manual BUCH75
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Please keep this instruction manual for future reference
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