The new Blueair 201 in-room air purifier is the only air purifier with its room capacity to use HEPASilent technology, a combination of the best features of electrostatic and mechanical filter technology that allows delivery of more clean air, at a faster rate, with less noise. The 201 is among the highest energy efficient and quietest operating air purifiers in its class, with a room capacity of 200 sq. ft (10 x 20 ft room). Blueair is the system for people living with allergies, asthma, or other respiratory conditions, or for anyone who wants cleaner, more breathable air. Features and Benefits: CADR 128 Smoke, 134 Dust, 140 Pollen 5 air changes per hour in a 200 sq. ft. room 82 to 141 CFM air flow Replacement Filters: Replacement HEPA Filters: Blueair Replacement HEPA Filter for 201 Series Dimensions and Weight: Size: 21"H x 17"W x 9.5"D Weight: 25 lbs.