Hunter 30067 Hepatech Air Purifier for Medium-Size Rooms Hepatech air purifier with whisper-quiet fan for medium-size rooms Removes 99.97-percent of dust, smoke, and pollen particles Changes the air up to 6 times an hour; odor-reducing carbon pre-filter Separate ionizer enhances air cleaning; LED filter-change indicator Measures approximately 19 by 18-3/5 by 12-8/9 inches; 5-year limited warranty