Dry indoor air during the heating season shows up as irritated skin, a scratchy throat and poor sleep - a humidifier brings the balance back. Ultrasonic models with cool mist, evaporative units and versions with a built-in hygrostat that holds your target humidity automatically are all part of this category. Size the device to the room area and check the tank volume, since a bigger tank means fewer refills. A quiet night mode suits bedrooms, and a timer, water-level indicator and replaceable filters for hard water add everyday convenience.
