Evaporative humidifiers function by utilizing a fan to blow air around a moist wick, pad, or filter. The h2o within the wick evaporates to the air, raising its humidity. Such a humidifier is self-regulating, as the rate of evaporation decreases given that the humidity amount during the air increases. A: https://laneyktbj.blogkoo.com/nationwide-humidity-control-for-dummies-57473576