Say goodbye to the itchy, irritating discomfort that comes with dry air with the Air King 9915 portable humidifier. This 3 gallon unit maximizes efficiency with a unique water recirculation system that humidifies the air with cool mist. Enjoy atmospheric comfort that covers up to 1,500 square feet in any area of your home or office. Operates QuietlyThe Air King 9915 cool mist humidifier operates silently, so it won’t disturb you while you’re working, sleeping, or reading. Easy to Use, Fill, and CarryThis portable humidifier comes with manual controls and an easy to fill front water door as well as an on/off indicator light. Relieves Symptoms Caused by Dry AirThe Air King 9915 relieves allergy symptoms and discomfort caused by dry air.Large Coverage AreaThis 3 gallon humidifier covers areas up to 1500 square feet, making it ideal for larger rooms and even small apartments.