An electrically powered heat pump cycles fluid, usually water or refrigerant, through long loops of underground pipes in a Geothermal system HVAC drawing. Heat is transferred from the building's ambient air to the ground via this process, and vice versa. As shown in the Geothermal system HVAC drawing, the three main components are the geothermal unit, the underground piping system (open or closed loop), and the ductwork. The compressor, loop-to-refrigerant heat exchanger, and controls are all housed in a single cabinet in the geothermal heat pump. The air handler, duct fan, filter, refrigerant-to-air heat exchanger, and condensate removal system for air conditioning are also included in systems that distribute heat via ducted air.
