Miele DDF 125 Manuale di istruzioni per l'installazione - Pagina 20
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Connection for air extraction
Use smooth pipes or flexible ducting
made from approved non-flammable
materials for exhaust ducting.
To achieve the most efficient air
extraction with the lowest noise
levels, please note the following:
– The cross-section of the exhaust
ducting must not be smaller than the
cross-section of the exhaust
connection (see "Appliance
dimensions").
– The exhaust ducting should be as
short and straight as possible.
– Only use wide radius bends.
– The exhaust ducting must not be
kinked or compressed.
– Ensure that all connections are
strong and airtight.
Remember that any constriction of
the air flow will reduce extraction
performance and increase operating
noise.
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If the exhaust air is to be ducted into
a flue, the ducting must be directed in
the flow direction of the flue.
Where ducting is horizontal, it must
be laid to slope away at at least 1 cm
per metre. This is to ensure that
condensate cannot drain back into
the cooker hood.
If the exhaust ducting is to run
through rooms, ceiling space etc.
where there may be great variations
in temperature between the different
areas. The problem of condensation
will need to be addressed. The
exhaust ducting will need to be
suitably insulated.