Product Detail Air purifier designed for large rooms up to 17 by 19 feet 3-speed whisper-quiet fan; ionizer with separate on/off switch CADR of 208 for smoke, 220 for dust, and 230 for pollen HEPAtech filter; carbon prefilter; LED filter-change indicators Measures approximately 17 by 8-1/4 by 19-1/2 inches; 5-year limited warranty . The "Hunter 30212 HEPAtech Air Purifier with 3-Speed Fan" is best product for you. We recommended Hunter 30212 HEPAtech Air Purifier with 3-Speed Fan