HVAC stands for Heating, Ventilation, and Air Conditioning, and is a term used to describe a system of components that work together to provide a comfortable indoor environment. This system is composed of several components, including a furnace, air conditioner, air handler, evaporator coil, and ductwork. The furnace is responsible for providing heat to the air in the home, while the air conditioner cools the air. The air handler is responsible for circulating the air throughout the home, while the evaporator coil helps to cool the air before it is circulated. The ductwork is responsible for distributing the air throughout the home. HVAC systems are used in both residential and commercial buildings, and they are essential for providing a comfortable environment. HVAC systems are also important for controlling humidity levels and air quality, as well as providing ventilation and air filtration.