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IN THE ABSENCE OF ANY INSTRUCTIONS SUPPLIED WITH THE GAS
HOB, THE MINIMUM DISTANCE BETWEEN THE HOB AND EXTRACTOR
MUST BE AT LEAST 760mm.
The width of any hob must not be greater than the width of the extractor
installed above it (Fig. 4).
Ducting and Ventilation
For best performance and lowest noise output, we recommend the
use of 125mm ducting. You can also use 100mm ducting but this will
reduce performance.
Wherever possible utilise rigid circular pipe which has a smooth
interior, rather than the expanding concertina type ducting. The
lengths of the ducting without performance being affected are 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
likely be reduced.
Please note: Ducting components and ducting kits are optional
accessories and have to be ordered, they are not automatically
supplied with the hood. Use of ducting less than 125mm in diameter
will affect performance and increase the noise produced by the
extractor.
