PRODUCT DESCRIPTION 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-gallon capacity and 2-gallon output every 24 hours. Easy-to-use push button controls, 3 fan settings (High, Low and Auto), simplistic design and the peace of mind of a 5-year satisfaction make the UH100 anything but ordinary. FROM THE MANUFACTURER IMPORTANT INTERNATIONAL DISCLAIMER: This item is built to meet U.S. voltage requirements and may not function properly when used in conjunction with external devices that alter or convert voltage or frequency of electricity. Improper use or shipping the product outside the U.S. will void all warranties.