There are two main types of cool-mist humidifiers: evaporative and ultrasonic. Evaporative humidifiers create a very fine mist that isn’t always visible to the human eye. Unlike warm-mist ...
We’ve added some new details to this guide about the use of bacteriostatic chemicals in ultrasonic humidifiers—a practice that we no longer recommend. Humidifiers are annoying. What they do is ...