“WINDfried” filter fan unit improves air quality in schools and public spaces
The corona pandemic is still bothering us more than we would like. The community school in our municipality now had the idea of whether our high-performance filters could also contribute to improving the air quality in the school. Originally at home in the highly controlled world of cleanroom technology, we then designed a filter unit that moves on castors and can simply be plugged into any household plug to start operating. The filter box has a ULPA 15 filter that filters particles down to 0.12 µm from the air – the Covid-19 virus has a size of approx. 0.16 µm. However, the viruses do not occur in isolated particles anyway, but are bound to droplets in the form of aerosols and can therefore be captured by high-performance filters. As the ULPA 15 filters also work very quietly, noise pollution during lessons was not a problem. However, we were actually surprised by the results of the particle measurement, which we normally carry out to check the particle concentration in our qualified cleanrooms. This time, the measurement took place in normally equipped rooms and during ongoing operations with up to 23 students. The result was all the more pleasing: the virus load was reduced by a factor of 10 with the use of the filter box. Measurements at other schools confirmed the results and were so positive that we are now offering the filter box, which we have simply christened “WINDfried”, to other interested parties.
