•The national Standard on
•The air outlet must not be connected to chimney flues or combustion gas ducts. The air outlet must under no circumstances be connected to ventilation ducts for rooms in which
•The air outlet installation must comply with the regulations laid down by the relevant authorities.
•When the unit is used in its extractor version, a sufficiently large ventilation hole must be provided, with dimensions that are approxi- mately the same as the outlet hole.
•National and regional building regulations impose a number of restrictions on using hoods and
•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
•If you have any doubts, contact the relevant controlling authority or building inspector’s office.
•Since the rule for rooms with fuel burning appliances is “outlet hole of the same size as the ventilation hole”, a hole of
•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.
—keep the hose as large as possible (preferably the same diameter as the outlet hole).
—the length should be no more than:
3 metres with one 90° bend
2 metres with two 90° bends
Bends of more than 90° will reduce the efficiency of the hood and reduce the airflow.
•Failure to observe these basic instructions will drastically reduce the performance and increase the noise levels of the extractor hood.
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