Studies on air cleaning

Pretty compelling list.

The combination ventilation and air cleaning should change the air 6 times per hour (6 Air Changes per Hour, ACH) according to e.g. The Harvard T. Chan School of Public Health and the Deutsche Aerosolgesellschaft. Another approach is to change/clean at least 50 (preferably 80) m3/hour per person, see Supreme Health Council (HGR NR 9616, February 2021).