Each individual filter has its life span. When filter is full, it needs to be replaced to ensure its optimal condition.

Philips air purifier is equipped with HealthyAirProtect Alert, it warns users when filter must be replaced. When one of the filters is almost full and has to be cleaned or replaced, the appropriate filter replacement light starts to flash to prompt user to replace concerned filter.

The information on this page applies to the following models: AC4012/70 .