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● Hoods can only be used safely with appliances connected
to a chimney if the room and/or flat (air/environment
combination) is ventilated from outside using a suitable
ventilation hole approximately 500-600 cm
2
large to
avoid the possibility of a depression being created during
operation of the hood.
If you have any doubts, contact the relevant controlling
authority or building inspectors office.
● Since the rule for rooms with fuel burning appliances is
outlet hole of the same size as the ventilation hole, a
hole of 500-600 cm
2
, which is to say a larger hole, could
reduce the performance of the extractor hood.
● If the hood is used in its filtering function, it will operate
simply and safely in the above conditions without the
need for any of the aforementioned measures.
● When the hood is used in its extractor function, the
following rules must be followed to obtain optimal
operation:
short and straight outlet hose
keep bends in outlet hose to a minimum
never install the hoses with an acute angle, they must
always follow a gentle curve only
keep the hose as large as possible (120 mm Ø min.).
● Failure to observe these basic rules will drastically reduce
the performance and increase the noise levels of the
extractor hood.