11
Before installation
Exhaust-air mode
The exhaust air is discharged upwards
through a ventilation shaft or directly
through the outside wall into the open.
Exhaust air must not be discharged via a
smoke or exhaust gas flue which is already
in use or via a shaft which is used for
ventilating rooms in which fireplaces are
located.
Discharge exhaust air in accordance
with official and statutory regulations
(e.g. national building regulations).
Discharge of air into smoke or exhaust air
flues which are not in use requires the
consent of a heating engineer.
If the extractor hood is operated in
exhaust-air mode at the same time
as a flue-type heater
(e.g. gas, oil or
solid-fuel heater, instantaneous water
heater, boiler),
ensure that there is an
adequate air supply
which the heater
requires for combustion.
Safe operation is possible provided that the
partial vacuum in the room in which the
heater is installed does not exceed 4 Pa
(0.04 mbar).
This can be achieved if the combustion air
is able to flow through non-lockable
openings, e.g. in doors, windows and in
conjunction with an air supply/air-intake
wall box or by other technical procedures
such as reciprocal interlocking.
If the air intake is inadequate, there is a
risk of poisoning from combustion
gases, which are drawn back into the
room.
An air-intake/exhaust-air wall box by itself
is no guarantee that the limiting value will no
be exceeded.
Note: When assessing the overall
requirement, the combined ventilation
system for the entire household must be
taken into consideration. This rule does not
apply to the use of cooking appliances,
such as hobs and gas cookers.
The extractor hood can be used without
restriction in circulating air mode – with an
activated carbon filter.
ṇ For exhaust air mode always cut out
the protective grid in the air connector.
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