Ultrasonic Humidifiers produce cool, soothing mist that you can see and feel. A water purification filter traps impurities before releasing mist into the air.
Ultrasonic Water Purification Filters
Replace every 2-3 months. The filter is designed to remove the minerals that create "white dust" when the unit is in operation. If white dust is coming out pf the humidifier, the filter should be changed.