Introducing the Coway Airmega 250 (AP-1720H) The sleek, advanced Airmega 250 air purifier efficiently filters harmful sources in your space and captures fine airborne particles and contaminants down to 0.01 microns, smaller than most bacteria and viruses. With a three-stage filtration system featuring custom Coway technology, this air purifier can help keep your air free of contaminants. The Coway Airmega 250 includes filter change indicators, easy-to-clean filters, Smart Mode (that adapts the air purifier to its surroundings), Rapid Mode and real-time air quality monitoring. Maintain pure air in spaces up to 930 square feet.