Airmega 100 Bundle! Compact but Powerful Air Purifier with 360° Air Intake The Airmega 100 is Coway’s first cylindrical air purifier and its most affordable model ever. Whether you want to reduce allergens, remove smoke or eliminate unpleasant odors, it efficiently filters harmful pollutants and purifies the air in your space with a 3-stage filtration system. This powerful system is able to capture nano-sized particles down to 0.01 microns, which is smaller than most allergens and mold.