The Honeywell InSight Series Air Purifier delivers powerful HEPA filtration & features a cutting-edge design that displays device setting information from a distance. The Air Quality Indicator is powered by a VOC sensor that will constantly monitor room air quality while providing real time, easy to understand color-coded feedback via the clear Insight Display Panel. When on Automatic Cleaning mode, the unit uses the air quality reading to automatically adjust to the optimal cleaning level for cleaner air. Air Cleaner Machine Type: HEPA; CADR: Smoke (325); Maximum Room Size (Square Footage): 500 sq ft; Maximum Room Size: 20 x 25.