DESC: Dry indoor air is difficult to clean; every movement causes millions of particles to be stirred up and become airborne. However, humidification keeps a large number of airborne particles down on the floor; making the "two-in-one humidifier/purifier" more effective than air purifiers alone. The Venta Airwasher humidifies the air while simultaneously drawing in and removing dust, pollen and other contaminating particles down to 10µ (10/1000 mm) in size from the air.