What is white dust, and should I be concerned about it?
White dust is a byproduct of minerals found naturally in water, which can sometimes be released into the air during the humidification process. White dust, which can be a nuisance but is not harmful, may settle on surfaces and furniture near the humidifier. It is easily cleaned just as you would normally dust. Warm moisture (steam vaporizers) and evaporative cool moisture humidifiers do not release any white dust into the air. The only types of humidifiers that can potentially release white dust are ultrasonic humidifiers and cool mist impeller humidifiers. Many ultrasonic humidifiers come with an optional demineralization cartridge designed to trap minerals before they can become airborne, thus reducing white dust. You can also use ultrasonic humidifier water treatment to reduce white dust. The amount of white dust you may experience will vary depending on the mineral content of your water supply. If white dust is a concern, you can use distilled water in your humidifier instead of regular tap water. Distilled water has very low mineral content and will not produce white dust. For other types of humidifiers, using distilled water will also reduce the amount of time you will need to clean your humidifier, and will help prolong filter life.
