In nature, UV-C radiation is absorbed by the ozone layer. As a result, humans, animals and microorganisms alike did not develop protective mechanisms against this radiation in the course of their evolution. Our Air Cleaner turns this principle to its advantage. Permanent UV-C irradiation of the air sucked into the housing inactivates 99.999% of all viruses, bacteria and microorganisms. This considerably minimises the risk of infection by COVID-19 and other infectious diseases.