The Vornado EVDC300 Evaporative Humidifier provides efficient, whole-room humidification and it will help you save money on your energy bills at the same time—its DC motor utilizes 90% less energy versus comparable Vornado AC humidifiers. When it is operating in Energy Smart™ mode, the humidifier will automatically adjust its speed and provide the right amount of power to achieve the most efficient performance. The EVDC300 has a minimalistic design and features a SimpleTank™ system with a clear, easy-to-fill, 1-gallon water tank. The clear tank also make it easy for users to visually see how much water is in the tank and when it is time to refill. The EVDC300 Evaporative Humidifier provides a natural, comfortable living environment in your home, plus you'll have peace of mind since it is backed by a manufacturer's 5-year warranty.