alt Hacker News> If you’re willing to use distilled water, ultrasonic humidifiers have their own advantages over evaporative.
Unless you are anally retentive about cleaning it, ultrasonic humidifiers vaporize microbes into the air. There have been loads of studies about this.
The only real way to avoid this is to use the humidifiers that are boiling the water.
The real pro tip is to get a whole home humidifier. They aren’t even that expensive. But I haven’t taken the plunge yet.
They avoid all these issues and require way less maintenance than any other solution.