The Honeywell InSight® Series Air Purifier delivers powerful HEPA filtration and 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.