Fast air purification in rooms of 20 m² – 40 m²: the compact AF 20 air purifier with H13 filtration and activated carbon reliably removes pathogens, fine dust, allergens and odors Perfect air purification for small rooms, children's rooms and individual workplaces - the air purifier AF 20 cleans the indoor air from allergens, pollutants and pathogens with the help of its multilayer filter system. Other functions include the filling of activated carbon, as well as a display for to alphanumerically indicate the air quality in PM2.5 particles in µg/m³ and the air quality via a color code The air purifier is also an excellent choice due to its timer function, child safety lock, night mode and ultra-quiet operation, as well as a filter efficiency of 99.95% for 0.3 µm particles and a high quality laser sensor for the automatic mode. This means that the automatic mode and performance level automatically adapts to the level of air pollution. Furthermore, the filter has a lifetime of about one year, depending on the level of air pollution and the intensity of use.