18 - EN
EN- 19
5.8 Extractor hood (optional)
Example extractor hood
It is possible to fit the ventilation system with a non-
powered extractor hood. The extractor hood is part
of the ducting of the ventilation system, and does
not form part of the unit. The unit can therefore not
turn a non-powered extractor hood on and off. We
recommend that the ventilation system is fitted with
a non-powered extractor hood made by Zehnder.
A powered extractor hood may never be
connected to the same ducting as the unit.
To protect the heat exchanger from the dirt removed
with the non-powered extractor hood the ducting
between the non-powered extractor hood and unit
must be at least 3m.
5.9 External filter (optional)
Example external filter
It is possible to fit the ventilation
system with an external filter, for
instance the FilterBox from
Zehnder. The external filter is
part of the ducting of the
ventilation system, and does not
form part of the unit. The unit can therefore not
provide an filter error for the external filter.
5.10 Unregulated sub-soil heat
exchanger (optional)
Example unregulated
sub-soil heat
exchanger inlet
It is possible to fit the ventilation
system with an unregulated
sub-soil heat exchanger. The
sub-soil heat exchanger is part of
the ducting of the ventilation
system, and does not form part
of the unit. It is therefore not
possible to control a sub-soil
heat exchanger from the unit.
