A furnace humidifier is a device that is installed within the heating system of a home, typically in the ductwork or near the furnace. Its primary function is to add moisture to the air that is circulated throughout the house when the heating system is running. The goal of a furnace humidifier is to increase the humidity levels in the indoor air, which can be particularly beneficial during the dry winter months when heating systems tend to dry out the air in your home. In regions with cold winters, indoor humidity levels can drop below the recommended range of 30-50%. Low humidity can cause discomfort, dry skin, respiratory issues, and can also affect wooden furniture, musical instruments, and other items in your home.