Vornado provides Whole Room Humidification. By incorporating Vornado’s signature Vortex Technology, the Vornado Ultrasonic Humidifier moves large volumes of harsh, dry air through the unit and then pushes the moistened air further out into the room, providing complete and even humidification. It also recovers and circulates heat off of the ceiling for even room temperature. Delivers cool or warm mist and has user defined settings that allow you to choose your desired humidity level and fan speed. The Vornado Whole Room Ultrasonic Humidifier is the only technology that combines the proven reliability of ultrasonic humidification with Vornado's signature Vortex Whole Room Circulation, resulting in a uniquely effective means to create a comfortable living space. The humidity is evenly distributed throughout the room by Vornado's signature deep pitch blade circulator. The humidistat provides automatic humidity control and the large 2 gallon capacity makes for less refills. Provides coverage up to 1250 sq. ft. It also equips with mineral cartridge to prevent minerals and calcium from misting out with the water, and reduce lime and calcium buildup within the unit.