Blueair 403 Air Purification System Air purification system for rooms up to 365 square feet Sleek, contemporary, Swedish design; steel housing; easy to use and maintain 2-stage HEPASilent technology captures 99.97-percent of 0.1 micron particles Ultra-quiet operation; energy efficient, pleasant SurroundAir system Measures 23 by 20 by 11 inches; 10-year warranty