An interior HVAC unit is a heating, ventilation, and air conditioning system that is installed inside a building or home. This type of system is used to provide a comfortable environment for occupants, as well as to control the humidity and air quality. The interior HVAC unit is composed of several components, including a furnace, air handler, evaporator coil, condenser coil, and ductwork. The furnace is responsible for generating heat, while the air handler moves the air throughout the building. The evaporator coil cools the air, and the condenser coil removes the heat from the air. The ductwork is used to transport the air throughout the building. The interior HVAC unit is designed to provide the right amount of air flow and temperature to the occupants, while also maintaining the air quality.