The UV-C and True HEPA Air Cleansing System is a complete system that provides multiple levels of cleaning including both True HEPA and UV-C light technology to enhance germ killing. The levels of cleaning of the UV-C Tower Air purifier include: Charcoal filter; which removes odors and smoke particles, True HEPA; captures 99.99% of airborne particles such as dust mites, debris, mold spores, pollens and pet dander, PCO filter; which captures and dissolves airborne bacteria, molds, fungi and volatile organic compounds while the UV-C light bulb sanitizes and kills germs that can cause cold and flu. The powerful but quiet fan quickly circulates the air in the room and is ideal for large rooms.