Miele S 4000 - Manual (Page 30)

Replacing the exhaust filter
Depending on model, the vacuum
cleaner will be equipped with one of the
following exhaust filters:
a SUPER air clean filter
b ActiveAirClean Plus filter
c Active HEPA Plus filter
"SUPER air clean" filter
A "SUPER air clean" filter is supplied
with every box of Miele dustbags. It
should be replaced each time a new
box of bags is started.
"ActiveAirClean Plus" or the "Active
HEPA Plus" filter
An "ActiveAirClean Plus" or "Active
HEPA Plus" filter should be changed
approximately once a year. Change the
filter sooner if it is obviously soiled or no
longer effective.
It is helpful to note the date directly on
the filter as a reminder for when to next
change it. See "Optional Accessories"
for filter descriptions.
Maintenance and care
30