Honeywell 50150 True HEPA Air Purifier: * Dimensions (in inches): 16.2 x 16.2 x 13.4 * Weight (in pounds): 21.1 * Filter efficiency of 99.97 percent for particles up to 0.3 microns in size * 5-year limited warranty * Certification on Clean Air Delivery Ratings from the Association of Home Appliance Manufacturers (AHAM)