External filter

Setting values
● External filter: no / yes
● Filter service life, external filter: 3 ... 6 ... 18 months
● Filter change, external filter: no / yes

External filter “yes” activates the filter change indicator for an outside air filter upstream of the ventilation unit. If the filter is changed prematurely, the filter change must be confirmed. This is done by selecting “yes” under Filter change, external filter. The filter service life is reset.