Coway Airmega 250 Smart Air Purifier, True HEPA Air Purifier with Smart Technology, Covers 930 sq. ft.The Coway Airmega 250 air purifier efficiently filter harmful sources in your space and capture 99.999% of nano-sized particles down to 0.01 microns, which is smaller than most allergens, bacteria, mold, and viruses. With coverage of up to 930 square feet, Coways 3-stage HyperCaptive filtration system (with Green True HEPA filter) wraps any space in clean air, 24 hours a day. Features Coways IoCare App, filter change indicators, smart mode, and real-time air quality monitoring. Coway Airmega 250S cleans and maintains spaces up to 930 sq. ft in 30 minutes.