Don Vandervort, Head Homeboy, has written more than 30 DIY home improvement books, been a segment host on HGTV, served as MSN.com's home improvement expert and written countless magazine articles.
A cool-mist impeller humidifier spins tiny droplets of moisture into the air. Available primarily as tabletop units, these hold from two to three gallons of water, are filled manually, and are easy to move around.
Cool-mist impeller humidifiers don’t have the problem with white dust that ultrasonic units have because the droplets produced are larger. And unlike steam humidifiers, cool-mist units use electricity only to propel the air, not to provide heat. This means they consume far less power.