The Honeywell HWM440WC top-fill warm mist humidifier provides warm mist in less than a minute to the air in your home to prevent dryness. It has two moisture output settings and auto shut-off. 1.5-gallon (5.7-litre) tank capacity features a wide opening that's easy to fill & clean. An ideal fit for large sized room, it can run up to 24 uninterrupted hours per filling. The float, mist dome, mist chimney and top cover are top rack dishwasher safe. Many find that a humidifier for the home, bedroom or nursery is an essential part of a good night’s sleep when the air is dry, in allergy season, or when sick