SILENT OPERATION - Destroy airborne germs and odors without ambient noise IONIC PURIFICATION - Sanitize & remove 99.9% of airborne allergens, irritants, and pollutants in your home - plus destroy cold & flu viruses, mold spores, and staph and strep bacteria. 3X CLEAN - Purifies the air in medium to large size rooms (up to 500 square feet) up to three times in one hour. Perfect for the home or office. FOREVER FILTER - Easy to clean, washable filter will save you money and lasts for years. ENERGY EFFICIENT - Sophisticated tower design uses less energy than a compact fluorescent bulb