It is no exaggeration to say that the quality of the filter can very well be used to judge the quality of the entire ventilation unit.

The Big Magic unit is supplied exclusively with F7 class filters. Compared to G4 class filters, they have a finer structure and capture significantly more dirt.

We also use a class F7 filter on the exhaust from the house. At first glance, when changing filters, it may seem that the exhaust filter is not as clogged as the filter on the fresh air supply to the house. In fact, the exhaust filter is more polluted with fine dust, which we all have at home to some extent, no matter how much we clean.

To qualify for a given class, a filter must capture at least 50% of particles.

The original Big Magic F7 class filters meet the ePM1 class even with a capture of more than 60% of the given particles. They are therefore much more suitable for ventilation units and also for your health.

Original Big Magic filters are also equipped with a collar that seals perfectly even if the filter is deformed due to impact clogging before the required replacement. So you don't have to worry about dust, pollen and other impurities getting into the heat recovery exchanger.