[Plough_Jogger]

I believe these are evaporative and are mentioned:

>Just use an evaporative or steam humidifier, which seem to create almost no particles.

[randomsquared]

this article talks about this more:

https://molekule.science/should-you-choose-an-ultrasonic-hum...

quite interesting

[mrkeen]

It was interesting right until it became an ad.