Warm mist humidifiers are purely steam humidifiers that allow steam to be cools slightly before it is released in a room. The systems contain heating elements which heat the water up in the reservoir resulting in it boiling and evaporating into steam.
Pros And Con of Warm Mist Humidifiers
Pros
Warm Mist Humidifiers are quieter than cool mist humidifiers
Less chance of being burnt as the steam has been cooled
Bacteria is killed as the water is heated.
Gives the home a warmer feel allowing you to turn the heating off and save some money.
Medication to help with health problems such as colds , sinus, congesting can be added to the water
Cons
Portable units can be dangerous to children because the water is boiling.
Warm mist humidifiers can get a bit load
Warm mist humidifiers need to be cleaned on a regular basis and can prove difficult to maintain
Although you can save money on heating bill, your still using electricity to heat the water.
*The most popular brands of warm mist humidifiers are Holmes, Bionaire and Vicks all of which have received good reviews on consumer websites.