Thanks for sharing this. Right now I know someone that is complaining of massive "white dust" thinking its coming from the ceiling (you know those fugly textured ceiling for soundproofing). While it COULD potentially generate dust, the level I have seen would make the ceiling dissapear within years, however due to nosebleed problems when dry, she uses humidifiers everywhere in the appartment. Since the heating dries up the place like crazy, she got ultrasonic humidifiers.
I never considered this but it would make sense, if you boil 1L of water out you end up with white stuff in the bottom once everything is dried out. Since nothing's left in the container when the ultrasonic is emptied, 1+1...
I don't know why this is flagged. People are way too rapid to dismiss stuff around here. Thanks for posting this!