Bosch BSG 8 Série Notice D'utilisation page 33

Changing the dust bags and filters
If you have used the vacuum cleaner for fine dust particles (such as plaster
or cement), clean the motor protection filter by tapping it and, if necessary,
replace the motor protection filter and the micro-hygiene filter.
Replacing the HEPA filter
The HEPA filter should be replaced once a year.
Press the locking tab in the direction of the arrow
to unlatch the exhaust grille and open it.
Release the Hepa filter by moving the locking lever
in the direction of the arrow and remove it from
the vacuum cleaner.
Insert the new Hepa filter and clip into place.
Close the exhaust grille.
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