District heating system for a building, comprising a district heating transfer station, a supplier-side primary side, a secondary side, wherein the secondary side is suitable for receiving district heating from the supplier-side primary side at the district heating transfer station on the building side, a surplus feeder, wherein the surplus feeder is suitable for providing additional thermal energy to at least one heat-dissipating unit of the secondary side, wherein the additional thermal energy has an origin different from the district heating, the surplus feeder comprises a hydraulic integration into the secondary side and the surplus feeder is suitable for providing the additional thermal energy by means of the hydraulic integration into the secondary side, characterized in that the additional thermal energy can be distributed to a plurality of heat-dissipating units of the secondary side according to a predetermined prioritization sequence, wherein the secondary side comprises a plurality of heat-dissipating units, wherein the heat-dissipating units are arranged in a row and the first downstream heat-dissipating unit of the row is a heat accumulator (20, 21a, 22), wherein a plurality of downstream heat-dissipating units are designed as a heating circuit, and wherein the surplus feeder provides additional thermal energy to the heat accumulator (20, 21a, 22) as a priority according to the predetermined prioritization sequence by means of the hydraulic integration, additionally comprising a controller, wherein the controller is suitable for adjusting a heating circuit target temperature of a predetermined heating circuit (70a; 70c) in order to enable a forced removal of the additional thermal energy provided by the surplus feeder if the heat accumulator (20, 21a, 22) is fully loaded. a district heating transfer station, a supplier-side primary side, a secondary side, wherein the secondary side is suitable for receiving district heating from the supplier-side primary side at the district heating transfer station on the building side, a surplus feeder, wherein the surplus feeder is suitable for providing additional thermal energy to at least one heat-dissipating unit of the secondary side, wherein the additional thermal energy has an origin different from the district heating, the surplus feeder comprises a hydraulic integration into the secondary side and the surplus feeder is suitable for providing the additional thermal energy by means of the hydraulic integration into the secondary side, characterized in that the additional thermal energy can be distributed to a plurality of heat-dissipating units of the secondary side according to a predetermined prioritization sequence, wherein the secondary side comprises a plurality of heat-dissipating units, wherein the heat-dissipating units are arranged in a row and the first downstream heat-dissipating unit of the row is a heat accumulator (20, 21a, 22), wherein a plurality of downstream heat-dissipating units are designed as a heating circuit, and wherein the surplus feeder provides additional thermal energy to the heat accumulator (20, 21a, 22) as a priority according to the predetermined prioritization sequence by means of the hydraulic integration, additionally comprising a controller, wherein the controller is suitable for adjusting a heating circuit target temperature of a predetermined heating circuit (70a; 70c) in order to enable a forced removal of the additional thermal energy provided by the surplus feeder if the heat accumulator (20, 21a, 22) is fully loaded.