In addition to the dustbag, the vacuum cleaner contains two filters; a central filter that protects the motor and an electrostatic, "Clean Air" filter that removes particles from the exhausted air.
The Clean Air filter should be changed every six months or whenever it becomes dirty.
The central filter should be changed or rinsed out whenever the Clean Air filter is replaced.
Eliminate dust re-entry from your Miele Powerhouse upright by keeping your exhaust air clean filter fresh. Miele recommends replacing this filter after 5 dust bag changes.