Installation - extraction
Connection for extraction
Danger of toxic fumes.
Please heed the “Warning and
Safety instructions” to avoid the
danger of toxic fumes.
The cooker hood should be in-
stalled according to local building
regulations. Seek approval from the
building inspector where necessary.
Air extraction ducting
– All ducting, pipework and fittings
must be of non-flammable material.
– The extraction ducting should be as
short and straight as possible.
To ensure efficient air extraction the
diameter of the exhaust ducting
should not be less than 150 mm.
If exhaust ducting with a diameter
of less than 150 mm or flat ducting
were to be used the noise level of
the cooker hood would increase
and extraction would be less effi-
cient.
– Only reduce the diameter of the duct-
ing if absolutely necessary, e.g.
where narrower ducting has already
been installed.
– Only use wide radius bends. Tight
bends reduce the air throughput of
the cooker hood.
– Only use smooth pipes or flexible
hoses made from non-flammable ma-
terials for extraction connection.
– When ducting is horizontal it must be
laid to slope away at
1 cm per metre,
to ensure no condensate drains into
the appliance.
– If the exhaust air is to be ducted into
the open air the installation of a tele-
scopic wall vent is recommended.
– If the exhaust air is to be ducted into
a vent flue the ducting must be di-
rected in the flow direction of the flue.
Important
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 sweating or
condensation will need to be ad-
dressed.
The exhaust ducting will need to be
suitably insulated.
Installation - extraction
30
