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•The air outlet must not be connected to chimney flues or combustion
gas ducts. The air outlet must under no circumstances be connected
toventilationductsforroomsinwhichfuel-burningappliancesare
installed.
•Itisadvisabletoapplyforauthorizationfromtherelevantcontrolling
authority when connecting the outlet to an unused chimney flue or
combustion gas duct.
The air outlet installation must comply with the regulations laid down
bytherelevantauthorities.
•When the unit is used in its extractor version, a sufficiently large
ventilationholemustbeprovided,withdimensionsthatare
approximately the same as the outlet hole.
•Nationalandregionalbuildingregulationsimposeanumberof
restrictionsonusinghoodsandfuel-burningappliances connected to
a chimney, such as coal or oil room-heaters and gas fires, in the
sameroom.
•Hoods can only be used safely with appliances connected to a
chimneyiftheroomand/orflat(air/environmentcombination)is
ventilatedfromoutsideusingasuitableventilationholeapproximately
500-600cm2 largeto avoid the possibility ofadepression being
createdduringoperationofthehood.
•Ifyouhaveany doubts, contact the relevant controllingauthorityor
buildinginspector’soffice.
•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 cm2, 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
safelyin the above conditions without the need for any of the
aforementionedmeasures.
•When the hood is used in its extractor function, the following rules
mustbefollowedto 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 (preferably the same diameter
as the outlet hole).
•Failure to observe these basic instructions will drastically reduce the
performanceandincreasethenoiselevelsoftheextractorhood.