Whirlpool APR25530L Whispure 190-CADR Electronic Air Purifier with True HEPA Filter Filters Air 4.8 Times per Hour in a 307 sq ft Room Quiet and Easy to Use Electronic Controls True HEPA filter to capture 99.97% of particles as small as 0.3 Microns Clean Air Delivery Rate (CADR) 190 3 Fan Speeds, Sleep Mode, Timer, Remote Control