Abstract: A drinking water supply system with circulation cooling includes a pump for producing a volumetric flow rate in a cold water circuit in the cold water line system, and at least one cold water return line and also a refrigeration unit, wherein the drinking water supply system comprises a primary low-temperature loop and a secondary high-temperature loop, wherein the refrigeration unit is connected to the primary low-temperature loop and the secondary high-temperature loop, wherein arranged in the cold water line system for cooling of the cold water is a heat exchanger which withdraws heat energy from the cold water and is coupled to the refrigeration unit such that the heat exchanger releases or transfers the heat energy of the cold water to the refrigeration unit by means of the primary low-temperature loop and the refrigeration unit makes the withdrawn heat energy available to the high-temperature loop.