Most articles on this subject seem to focus on the difference between warm and cool mist humidifiers. The decision is actually far more complicated than that, as there are several different types within those two categories. Let’s take an entirely different approach, and ask three important questions:
1. Is noise important? The most popular type of cool mist humidifier uses a fan to help evaporate the water. Obviously, a fan can make quite a lot of noise, and can be very annoying when you are trying to sleep. Warm mist humidifiers that use a heating element can make a gurgling noise. This is much quieter than a fan, but it can still be a problem for some people. Ultrasonic humidifiers on the other hand are almost silent to the human ear, making them the obvious choice if you require a noise free option.