Miele KWL 4612 S Operating And Installation Instructions page 14

The active charcoal filter and the
dynamic cooling system work together
to ensure a good air flow is maintained
throughout the cabinet and thus
achieve optimum air quality.
The dynamic cooling system draws
fresh air with a humidity level of 60-70%
from outside the appliance, in through
the active charcoal filter and distributes
it evenly around the interior.
Filtering the incoming air through the
active charcoal filter ensures that all the
air entering the appliance is fresh and
free from dust. Because the
temperature is constant and evenly
distributed throughout the unit you have
the reassurance that all your wines are
being kept in the same condition.
Replace the active charcoal filter
with a new one once a year (see
"Cleaning and care"). These are
available from your dealer.
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