Ultrasonic Humidifier

An ultrasonic humidifier is one that uses high-frequency sound vibrations to produce an extra fine water mist that is then expelled to add moisture to the room. It is often considered the quieter of both types of humidifiers. The ultrasonic generally has no filter factored into its design. That does save operation costs, but it does come with a trade-off.
You'll get more greyish dust around the room when operating an ultrasonic humidifier than with an evaporative because there's usually no filter to absorb mineral scale deposits. Some models, however, come with ceramic-type cartridges that can be refreshed, and these are effective to some degree. Another way to reduce the scale dust is to use demineralized water in the reservoir, though that can be pricey.
Some prefer this type of humidifier because it is considered safer in that there is no hot water present in the unit and therefore no risk of scalding since the unit does not heat the water in any way. As with any humidifier that does not boil the water to produce a mist, there is a risk of bacteria being present in it and being discharged to the room. Disinfecting the humidifier becomes even more important than with a warm mist humidifier that does boil the water. Click here to know more about #ultrasonic humidifiers.