Honeywell Top Fill Evaporative Cool Mist Humidifier runs quietly on three different power levels to give you just the right amount of humidity for your room. The cool mist is gentle and doesnt pose a burn risk if little ones get too close. The top fill feature makes it much easier to add more water without disassembling the unit or lugging it to the sink with you. The continuous water flow and illuminated water window also let you easily see when its time to refill. But possibly the best feature is that this room humidifier can run up to 48 hours without needing a refill, making it one of the easiest to manage on the market.