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Water To Air Heat Pump Apparatus 12v thermostat controller jaycar Set of 50 rocks byHeat Pump and the refrigerating machine basically work on one and the same principle and with the same components. Heat pump is a machine, which delivers heat at a temperature suitable for domestic, Industrial and Commercial purposes. By added work input from the motor or engine it extracts heat from low grade source. In many circumstances heat pumps can make valuable contribution to energy conservation. The majority of heat pumps operate on the