Heat pump heat, ventilation, and air conditioning (HVAC) combines a furnace and air conditioning function into one system. In the summer, the heat pump can extract heat from outside air to push cool air in the home. In the winter, the heat pump takes heat from outside air to provide thermal comfort indoors, venting cool air outside.
Heat pump HVACs can have two different configurations: a ducted central system and a ductless mini-split system.
A ducted central system takes advantage of existing ducts to create one temperature zone throughout the building. Properly insulated ducts ensure that the heated/cooled air does not change temperature as it moves through the ducts.
A ductless mini-split system, on the other hand, does not require ducts but instead runs refrigerant lines through the walls. Multiple temperature zones can be created throughout the building with individual indoor units. Ductless systems are an option for buildings with baseboard/floor/wall heating and window air-conditioning.