Air filter

When operating the ventilation unit without an air filter → Danger to health and risk of injury due to infections and respiratory diseases. The ventilation unit becomes dirty and unfiltered substances can enter the rooms.
Always operate the unit with two air filters (interior wall and exterior wall side).
Only use original air filters with the prescribed filter class.
Pay attention to the filter change indicator.
Change the air filters regularly, after six months at the latest.
Replace the air filters even if the ventilation unit has not been used for a longer period of time.