Evaporative humidifiers function by using a fan to blow air above a moist wick, pad, or filter. The h2o inside the wick evaporates to the air, rising its humidity. This sort of humidifier is self-regulating, as the speed of evaporation decreases as being the humidity degree in the air improves. https://nationwide-humidity-contr99876.blogdon.net/the-fact-about-humidity-control-that-no-one-is-suggesting-54172299