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 sqft without pooling water on the floor The builtin 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 Easytouse 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