Ventilation unit filter replacement intervals can vary a lot. In some homes, the filters turn dark within a few weeks. In others, they can almost be forgotten for close to a year. The difference usually comes down to outdoor air pollution, where the home is located, ventilation intensity, whether the unit is correctly sized, the filter class, installation direction and the quality of the filter itself.

Properly maintained filters are essential to ensure you always breathe clean air at home. Changing the filters isn’t difficult – you just need to follow a few simple steps.