Compared to full size ionic air purifiers, the filter from this purifier captures over 6 times more pollutants+. A powerful but quiet fan pulls air into the unit, circulating and filtering the air in your room up to 5 times each hour. The permanent filter is easily rinsed clean in water, requiring little maintenance and no expensive replacement filter costs. The sleek, compact tower design takes up little space, and can be used virtually anywhere - tabletops, counters, floor or nightstand. This model is most effective in small size rooms up to 62 square feet.