BIONAIRE CP2550 Warm Mist Humidifier Bionaire has been a leader in designing and developing air treatment devices and this humidifier effectively restores humidity in a large room in your home Effectively and comfortably moistens the air in a 14-foot x 20-foot room but can also cover larger areas The warm mist effectively destroys pathogens to provide a clean health-promoting mist (doesn't leave annoying white-dust like the cool-mist models) Up to 2.2 gallon output per day Strong enough to accommodate areas up to 500 square feet