This is the air purifier that eliminates up to 99.9% of airborne bacteria, mold, viruses, pet dander, dust mite allergens, and pollen without making a sound. With no filter to replace or clean, the device uses natural convection to silently draw airborne impurities into its patented ceramic heating chamber that instantly destroys the microorganisms with 400º F heat and then releases the clean air into the room. An independent laboratory confirmed that the unit destroyed up to 99.99% of bacteria and mold regardless of the microorganism’s size or level of hazardousness. The sanitized air is cooled and recirculated into the room, providing a healthier breathing environment without producing ozone or requiring you to clean or replace a costly filter. It will quickly and efficiently replace the air in a standard room size in about four hours of use. The air purifier remains cool to the touch and the heat it produces will not affect room temperature. 10 1/2" H x 8 1/2" Diam. (3 1/3 lbs.)For Rooms Up To 550' sq. Gray.