Hunter 30895 Total Air Sanitizer is the only air cleanser combining HEPA filtration to trap 99.9-percent of allergens and electrical tips on the filter to actually KILL molds, germs, bacteria and other living particles. Total Air Sanitizer uses an electrified HEPA (High Efficiency Particle Arresting) filter of randomly arranged fibers tight enough to trap irritants, but allow air through. Captured particles as small as 0.3 microns are kept from recirculating, including allergens, bacteria, mold, germs and viruses. 9000-volt of safely-applied electrical currents running through the fibers kill living biological pollutants like germs, viruses, bacteria and molds. Total Air Sanitizer captures and kills pathogens like: Pseudomonas aeruginosa, Staphylococcus aereus, Klebsiella pheumonia and human influenza (H1N1). For maximum sanitation qualities change the filter about every six months, depending operating conditions. A filter Indicator light by the speed control knob flashes red after around 4,000-hour of use visibly reminding you of filter change. Independently certified for rooms up to 26 by 30 feet. Total Air Sanitizer is perfect for tucking next to a sofa, desk or bed. Having a Total Air Sanitizer in each room provides air sterilization 24/7. Total Air Sanitizer measures roughly 10 by10-inch wide by 25-inch tall - roughly the size of a speaker- and weighs only 14 -pound. Whisper quiet motor on the highest setting is quieter than normal conversation. Uses 40-watt on low setting, 53-watt on high speed. Average cost of operation 24-hour per day 365 days per year approximately $3 per month (based on a $0.10/kilowatt hour 2006 average). Oil rubbed bronze finish blends seamlessly with your decor. Comes with a detailed owner"s manual and 5 year limited warranty with option to purchase lifetime warranty. 1 year warranty on the cord, ionizer, and front grill if they fail due to defective material or workmanship.