First, they start out with the wrong premise. The propose of a humidifier must be to make your homes relative humidity what would be considered healthy other why humify at all? I quote them " The Everlasting Comfort Ultrasonic Cool Mist Humidifier boasts an impressive 1.6-gallon capacity that can run for 50 continuous hours. In our testing, a whopping 49% of the water remained in the tank after eight hours." How does water in the tank help? My apartment is 160 SQ FT and it takes 3 gallons of water to keep it at 40% (RH). They include, "Best Stylish Humidifier" all show no go! Please note I am rating their performance in rating these humidifiers as best of and if they were honest they would say do not buy any of them, and I will not!