Dia 2.4 Gallon Output Ultrasonic Home Aroma Humidifier Air Diffuser Purifier Lonizer Atomizer Cool Mist Humidifier holds 0.8 gallon of water and produces up to 2.1 gallon moisture output per day Provides relief from cough, cold and flu symptoms Increases air moisture for easier breathing and a good night's sleep Beauty salon, SPA, Yoga, Bedroom, Living room, Conference room, Office, Reception center etc.