In this article: Vicks Filter-Free CoolRelief Cool Mist Ultrasonic Humidifier, PureGuardian Ultrasonic Warm & Cool Mist ...

There are two types of cool-mist humidifiers: ultrasonic and evaporative. They work in very different ways to produce water vapor and increase humidity in a room. Learning the differences makes it ...

Many modern humidifiers distribute fine mist moisture into the air with either ultrasonic waves or fan-driven evaporation. Both ultrasonic and evaporative humidifiers are highly reliable at ...