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Ducting:
The extractor can be used as a recirculation device or as a extraction
device, depending on your installation.
The hood is more eective when used in the extraction mode (ducted
to the outside). When the cooker hood is ducted to the outside,
charcoal filters are not required. The ducting used must be 150 mm
(6 Inches), rigid circular pipe and must be manufactured from fire
retardant material, produced to BS.476 or DIN 4102-B1.
Wherever possible utilise rigid circular pipe which has a smooth
interior, rather than the expanding concertina type ducting. The
maximum length of the ducting without performance being aected is
as follows:
• 4 metres with 1 x 90° bend.
• 3 metres with 2 x 90° bends.
• 2 metres with 3 x 90° bends.
Longer ducting can be used but the performance of the extractor will
be reduced.
Please note ducting components and ducting kits are optional
accessories and have to be ordered, they are not automatically
supplied with the chimney hood. Use of ducting less than 150mm in
diameter will aect performance and increase the noise produced by
the extractor.
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