This Air Innovations ultrasonic, cool mist, humidifier is one of the top rated and longest running humidifiers available for its size. It features a 1. 6 gallon tank that runs for a full 100 hrs. on low (almost 13 nights of sleep) and is completely silent. It’s powerful enough to add humidity to medium-large rooms up to 600 sq. ft. , with an easy-to-read digital LED display lets you choose from five mist settings, program the timer, and adjust the humidistat for customized room humidity. The tank and base are infused with an inhibitor to help prevent microbial growth on the surface of the tank and base. It also includes a permanent ceramic filter that never needs to be replaced. The convenient top-fill design allows you to easily add water to the tank without removing it from the base. It also has a 360 degree rotating mist nozzle helps direct the moisture. Unlike other humidifiers, it also features a 15 inch extension nozzle so it can convert from a table top unit to a floor humidifier in seconds and has a small foot print of only 10 inch across by 16 inch high. Perfect for kids and babies, this cool mist humidifier also rehydrates your skin to help you look younger, relieves dry eyes, scratchy throats, post nasal drip and helps reduce snoring so you sleep better. It also rehydrates wood furniture, cabinets, wood floors and wooden instruments.