Honeywell True HEPA Allergen Remover #1 brand recommended by allergists Helps capture certain airborne germs Circulates room air up to 5 times per hour & AHAM CADR Rated 100 - Room Size: 12' x 13' (155 sq. ft.) Activated Carbon Prefilter helps reduce unpleasant odors Manual Controls: 3 cleaning levels & electronic filter replacement reminders