In this filtration process, the HEPA-13 HEPA filter filters 99.95% of all particles in a size range between 0.1-0.3 micrometers. This means that, for example, coronaviruses (0.12 - 0.16 micrometers), many other influenza viruses and a large number of other allergens, germs and other pathogens can be effectively removed from the air.