Which humidifiers for hard water are best? Hard water is called “hard” because of the abundance of minerals that it contains. Due to the processes that humidifiers use to vaporize water, all of those ...

Humidifiers use one of four evaporation types: steam, evaporation, ultrasonic and impelling. Most modern humidifiers have cool and warm mist settings, each with hard water caveats. Cool mist: Cool ...