Cleans the air in 5 ways, an air-cleaning technology for virtually every airborne indoor pollutant. True HEPA air filter to capture dust &allergens; such as pollen, ragweed, dust mites & mold spores. Activated carbon filter to remove odors, chemical vapors & cigarette smoke with washable pre-filter. Ultraviolet lamp destroys viruses, germs, mold and bacteria making it a complete air cleaner system. Photocatalytic oxidation filter with powerful fan to neutralize odors, bacteria and VOC's.