Vornado AQS15 True HEPA 3-Speed Air Purifier 3-speed air purifier for rooms up to 230 square feet Changes the air in a room up to 6 times per hour; whisper-quiet operation Top-mounted controls; upward clean-air delivery; flat back; built-in handles 1 True HEPA filter and 3 PreSorb carbon prefilters included Measures 9-2/3 by 13-4/5 by 14-5/8 inches; 5-year limited warranty