Study: Commercially available air purifiers can remove 90% of the aerosols in school classes

An experimental study found that installing four commercial air purifiers in a classroom reduces aerosol concentrations by 90%. The team around Joachim Curtius of the Experimental Atmospheric Research Group of the Goethe University Frankfurt used one H13 filter in each of the devices, which can filter particles in a size of 0.1 particles in a size of 0.1 µm to 0.3 µm from the air.

Respiratory viruses such as SARS-CoV2 are transmitted by droplet infection, touch and aerosols. Air filters can serve as a protective measure against aerosols that are incompletely retained by masks.