Featured in Better Homes & Gardens: The 3 Best Evaporative Humidifiers, According to Our Tests

According to Lycia Thornburg, MD, FAAD, fellow of the American Academy of Dermatology, evaporative humidifiers are beneficial because they typically self-regulate, so they won’t cause humidity levels to get too high in the room. That doesn’t mean they always have an automated shut-off that turns the device off when it runs out of water; instead, a self-regulating humidifier is one that detects humidity levels in the air and adjusts the amount of moisture it releases, releasing less over each session it’s running.