3-in-1 Air Purifier with True HEPA FilterBrand: Guardian Technologies Color: Grey Features: True HEPA Filter captures 99. 97% of dust and allergens as small as . 3 microns such as household dust, pet dander, mold spores and plant pollens. Charcoal filter reduces common odors from pets, smoking and cooking. Air Purifiers with UV C light technology work with Titanium Dioxide to kill airborne bacteria, viruses, germs and mold spores. 22 inch 3 speed tower is best used for medium sized rooms and