The FSP900 Portable True HEPA Air Cleaner by Five Seasons offers 5 in 1 air filtration and sterilization. This patent-pending combination uses HEPA, UVC Germicidal Light (non ozone producing) and Photo Catalytic Oxidation. It disinfects and deactivates allergens, lung damaging atmospheric dust, biological and chemical contaminants and odors, such as formaldehyde, toluene, benzene, cook.