A comment
For a long time I could not decide on the choice of a humidifier, I counted a bunch of necessary and not very information, that's why I want to share my impressions about the Supra HDS-111 humidifier.
This is an ultrasonic model, it works, you can say silently (it goes no more than 35 dB, you yourself understand that this noise level is not felt). Water evaporation occurs due to ultrasonic vibrations, there is no heating here.
You can adjust the steam intensity, for this there is a switch on the front panel. There is also a backlight on the humidifiers, so at night it also performs the role of a lamp. The tank is designed for a volume of 3 liters, on average, water consumption is 300 ml / hour. It consumes little electricity - 25 watts, but in general we use it only a few hours a day, this is completely enough to properly moisturize the air.