The Vornado UH100 ultrasonic humidifier gives you comfort you can see and feel. Powerful whole room circulation evenly distributes humidity throughout the whole room up to 600 sq-ft. without pooling water on the floor. The built-in humidistat allows you to set your comfort level while the UH100 automatically maintains it. With the SimpleTank? system we made carrying, filling and cleaning the tank, well, simple 1 ga capacity and 2 ga output every 24 hr. Easy-to-use pushbutton controls, three fan settings (high, low and auto), simplistic design and the peace of mind of a 5 years satisfaction guarantee make the UH100 anything but ordinary.