A furnace is a type of HVAC system that uses a combustion process to heat air and distribute it throughout a home or building. It typically consists of a blower, heat exchanger, and a burner. The heat exchanger is heated by the burner, and the blower circulates the heated air through the ductwork.
HVAC stands for Heating, Ventilation, and Air Conditioning. It is a system that provides heating, cooling, and ventilation to a home or building. It typically consists of a furnace, air conditioner, and air handler. The furnace heats air, the air conditioner cools air, and the air handler circulates the air throughout the building.