Hunter Fan Total Air 30408 Air Purifier 3 speeds for rooms up to 8' x 10'What makes the Hunter Total Air Sanitizer a revolutionary step forward in air purification is the design of the filter. It applies electricity not only to just the surface but all the way through the depth of the filter. Any of the germs and viruses that are caught inside of the filter - whether on the surface, in the middle, or towards the back of one of the layered pieces - are actually killed once they come in contact with the filter. Hepa filtration traps 99.9-percent of allergens while electrical filter tips kill living biological pollutants Lightweight and small for use in any room or office Certified for rooms up to 26 by 30-feet Whisper quiet operation