Unlike typical cool mist humidifiers, this model's key parts and wicks have built-in anti-microbial properties to inhibit the growth of bacteria, mold, and fungi that plague other units, ensuring reliable use with minimal maintenance. The 3.5-gallon tank can humidify a 1,600' sq. room, and the regulated release system maintains constant water flow, eliminating stagnant water that can breed bacteria. Unlike other units, the tank and base are dishwasher safe, making this one of the easiest humidifiers to clean, and the wicks rinse clean under cold running water, so they never have to be replaced. The system shuts off automatically in the event the tank becomes empty, reducing stress on the motor to promote long life. An adjustable digital humidistat allows precise humidity control, automatically stopping vapor dispersal when the room reaches the desired humidity level. The tank incorporates a softly glowing night light that reassures children and makes it easy to read the water level in a darkened room. 12" H x 16" W x 11" D. (10 lbs.)