When you start to feel dry skin as the weather cools or wake up with throat irritation, it might be time to use a humidifier. Humidifiers are appliances that add moisture in the air of your home to balance out the humidity levels that can dry out during drier seasons. There are several types of humidifiers that use different methods to do this. The most popular types are ultrasonic, evaporative, impeller, and steam humidifiers. A good humidifier will have the right combination of functionality and ease of use to fit neatly into your home. The most important feature to consider when looking for a humidifier is whether you want a warm mist humidifier, which is preferred during the cooler months of the year, or a cool mist humidifier, which adds indoor humidity.