Honeywell HPA104 True HEPA Allergen Remover Recommended for Medium Rooms (155 sq. ft.) 4 air cleaning levels: Germ, General Clean, Allergen and Turbo Automatic shut-off  2, 4, or 8 hours. Control panel light dimmer Electronic filter replacement reminders To ensure stated product performance, use only Certified Honeywell Replacement Filters. #1 brand recommended by allergists Helps capture certain airborne germs Circulates room air up to 5 times per hour & AHAM CADR 100 - Room Size: 12' x 13' (155 sq ft) Activated Carbon Prefilter helps reduce unpleasant odors Easy tap electronic controls w/ 3 air cleaning levels plus Turbo Clean setting & 2, 4 & 8 hour timer