An evaporative humidifier works with the help of a wick filter. The wick is a filter which is used to absorb water from the reservoir. In these kinds of House Humidifiers, there is a fan which is adjacent to the wick and used to blow air onto the wick to aid in the evaporation of the water. These wicks become rotten if they are not dried out completely between fillings, and become covered with mineral deposits too. Thus, maintenance of the wick is always necessary in a regular basis. However, evaporation from the wick is dependent on relative humidity of a room. A room that has low humidity will have a higher evaporation rate that is compared to a room with high humidity. An evaporative humidifier is a type of humidifier that is self-regulating, increases room humidity, the water vapor output naturally decreases.
There is a type of evaporative humidifier that has just a reservoir and wick; such evaporative House Humidifiers are called natural humidifiers. One type of natural humidifiers use a stainless steel bowl which is partially filled with water and covered by a towel. It functions properly when a weight is used to sink the towel in the center of the bowl. These humidifiers do not require fan as the water spreads through the towel by capillary action and the towel surface area is large enough to provide for rapid evaporation.
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