The 4 gallon Honeywell QuietCare™ humidifier provides invisible, cool moisture. The EasySet™ Electronic Controls are simple to use with individual controls for desired speed and humidity, making it easy to maintain your desired comfort level. The humidifieruses a Protec Antimicrobial treated filter to help prevent the growth of mold and bacteria on the filter. This humidifier is recommended for large size rooms and is ideal for bedrooms and living rooms. It's compact, space-saving design allows for placement anywhere in your home. For Large rooms up to 1400 sq. ft. (3 Year Warranity).