Installation for heating in an industrial warehouse with fancoils using 4 high power inverter ground source heat pumps CLAUSIUS STRONG TANDEM H 12-150 connected in cascade, which provides a total heating power of 600 kW. This installation uses as heat source water from the river in an open circuit. As can be seen in the image, the installation is simple and consists of a closed circuit with glycol that exchanges heat with the river water in a plate heat exchanger, the 4 heat pumps and a buffer tank of only 500 liters, from which hot water is distributed to the fancoils.