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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.
Ducting and ventilation
For best performance and lowest noise output, we recommend the
use of 125mm ducting. Using ducting of a lesser diameter will reduce
performance.
Wherever possible utilise rigid circular pipe which has a smooth
interior, rather than the expanding concertina type ducting. The
lengths of ducting with minimal effect on performance 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.
The ducting used should be 125mm, rigid pipe of a constant diameter
and must be manufactured from fire retardant material, produced to
BS 476 or DIN 4102-B1.
Ducting kits are optional extras and are not provided with the
appliance.
