Exhaust-air mode
•
Installation accessories for exhaust air
mode.
Ventilation duct
AD280/281-016 for ceiling heights of
2.27–2.44 m
AD280/281-026 for ceiling heights of
2.44–2.76 m
AD280/281-036 for ceiling heights of
2.76–2.98 m.
16
Prior to installation
The exhaust air is discharged upwards through a
ventilation shaft or directly through the outside wall
into the open.
Exhaust air should neither be directed into a smoke
or exhaust flue that is currently used for other
purposes, nor into a shaft that is used for
ventilating rooms in which stoves or fireplaces are
also located.
Exhaust air may be discharged in accordance
with official and statutory regulations only (e.g.
national building regulations).
Local authority regulations must be observed when
discharging air into smoke or exhaust flues that are
not otherwise in use.
When the extractor hood is operated in exhaust-
air mode simultaneously with a different burner
which also makes use of the same chimney (such
as gas, oil or coal-fired heaters, continuous-flow
heaters, hot-water boilers) care must be taken to
ensure that there is an adequate supply of fresh
air which will be needed by the burner for
combustion.
Safe operation is possible provided that the
underpressure in the room where the burner is
installed does not exceed 4 Pa (0.04 mbar).
This can be achieved if combustion air can flow
through non-lockable openings, e.g. in doors,
windows and via the air-intake/exhaust-air wall box
or by other technical measures, such as reciprocal
interlocking, etc.
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 not 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 ovens.
Unrestricted operation is possible if the extractor
hood is used in recirculating mode – with activated
carbon filter.
If the exhaust air is going to be discharged into
the open, a telescopic wall box should be fitted into
the outside wall.
Exhaust-air
630-
1390
