1) First of all there are basically just two types of humidifiers. Warm air humidifiers and cool air humidifiers
2) Warm air humidifiers heat the water and release it as warm vapor. The electricity used by warm air humidifiers is no more than that used to heat water in a kettle. The boiling of the water means that the water is disinfected and does not release any bacteria in the water. That is why some refer it as antibacterial humidifier.
3) Cool air or Cool Mist Humidifiers instead release cool water vapor and is suitable for families with small children. It uses an evaporation wick, impeller or creates ultra sonic sound waves to dissipate the water as a cool mist
4) Cool air humidifiers use less electricity compared to a warm air humidifier, however their biggest downside is that they require constant replacement of the filter, which can cost around $20 and thus be expensive to maintain
5) The evaporation wick humidifier absorbs water using the wick or filter, it then uses a fan to cause the water to be naturally evaporated and then dispelled over the room. The only problem is the noise created by the fan.
6) The Impeller creates a cool mist through a high speed revolving spinning disk placed inside the water. The Ultrasonic air purifier uses sound waves to cause the mist.
Irrespective of the type of humidifier you decide upon, you will also need to analyze cost of replacing humidifier filters that protect you health needs. Best capacity size, and ease of water storage. Find out how to minimize the cost of buying the best air humidifier for you best air humidifier for you.