Surround Air S1000-Ultra Air Purifier With a Ti02 Filter HEPA filter stops 99.97% allergens, dirt and dander down to the 0.3 micron level UV lamp kills germs and bacteria quickly and effectively Carbon filter constantly traps odors and gasses for clean smelling air Ti02 filter proven to eliminate V.O.C?s for safer, cleaner air Runs quietly even on its highest settings