Evaporative humidifiers work by making use of a fan to blow air above a wet wick, pad, or filter. The water within the wick evaporates into your air, raising its humidity. Such a humidifier is self-regulating, as the speed of evaporation decreases as the humidity stage inside the air raises. https://humiditycontrol65319.mybjjblog.com/nationwide-humidity-control-options-50351001