In all enclosed spaces, air purifiers will be complementary to CO2 detectors. Indeed, while the CO2 sensor indicates the carbon dioxide level in a room, the air purifier directly acts on the indoor air pollutants to eliminate them. A professional model such as the EOLIS Air Manager, equipped with a medical-grade HEPA 13 filter, protects the occupants of the room (staff, public, etc.). In this period of pandemic, its efficacy has been proven against coronavirus, up to 99.6%. Finally, it also indicates, on its control screen, the concentration of VOCs and PM2.5 in the air in the room.