T 31 air purifier from Tors & Olsson refreshed the air in your room by trapping harmful particles, which can cause health problems and contaminate your surroundings. With the purifier turned on, you can eliminate dust particles, pollen mould spores and pet dander. The HEPA filter is effective on contaminants that measure up to 0.3 microns or more. The carbon pre-filter minimizes bad odours and other harming elements in the room. It runs on 3 different speeds, has a sleep mode and timer setting to give your uninterrupted sleep.