Table of Contents
Advertisement
,
Important: To avoid the danger
of toxic fumes, please observe the
Warning and Safety instructions.
This is especially crucial when using
the rangehood at the same time as
another heating appliance which
relies on air from the same room.
The rangehood should be installed
according to local and national
building regulations. Seek approval
from the building inspector where
necessary.
– All ducting, pipework and fittings
must be of non-flammable materials.
– The exhaust ducting should be as
short and straight as possible.
– Only use rigid ducting fixed into
place.
– To ensure efficient air extraction, the
diameter of the exhaust ducting
should not be less than 200 mm.
If exhaust ducting with a diameter of
less than 200 mm, or if flat ducting is
used, the noise level of the
rangehood will increase and
extraction will be less efficient.
– Only reduce the diameter of the
ducting 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 rangehood.
– Only use smooth pipes or flexible
hoses made from non-flammable
materials for extraction connection.
Connection for air extraction
If the exhaust ducting is secured to
the exhaust stub by a hose clip,
ensure that it is fitted correctly and is
not askew. Do not overtighten.
Otherwise the exhaust stub could
buckle and the non-return flap could
become jammed.
– When ducting is horizontal, it must
be laid to slope away at at least 1 cm
per metre to ensure no condensate
drains into the appliance.
– If the exhaust air is to be ducted into
a vent flue, the ducting must be
directed 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 condensation will need to
be addressed. The exhaust ducting will
need to be suitably insulated.
31
Advertisement
Table of Contents
