Comfort: For many people, especially children, a dry indoor climate due to low humidity can cause a variety of discomforts such as dry skin and eczema, sinus problems, bloody noses, and itchy eyes. A humidifier is a device that adds moisture back into the air, and a relative humidity of between 35 and 55 percent is the most comfortable for most people.
Cold and Flu: Air moistened with a humidifier can help soothe some symptoms of colds or flu, including irritation of nasal passages, the throat and bronchial tubes, helping you breathe and sleep easier.
Lower Utility Costs: When the humidity is set higher in the winter, you will feel warmer at a lower temperature so you can turn your thermostat down a couple of degrees.
Wood Preservation: Wood floors, wood furniture, pianos, and artwork can split and crack when the air is too dry.