The 3 gallon Honeywell QuietCare humidifier uses cool moisture to quietly provide natural relief from dry air. It has manual controls for simple operation, an adjustable humidistat and 3 moisture control settings. Plus, your humidifier stays cleaner, longer with Protec Continuous Cleaning which includes a Protec Cleaning Cartridge to help provide fresher, cleaner mist and a Protec Antimicrobial treated filter to help prevent the growth of mold and bacteria on the filter. This humidifier is recommended for medium to large size rooms and is ideal for bedrooms and living rooms. It's compact, space saving design allows for placement anywhere in your home.