The project for the restoration of the heating system of Rijeka foresees the modernisation of the 7 heating systems in such a way that 3 systems will be merged into one while 1 system will be modernised independently. The modernisation of each system involves the reconstruction of the production facility in order to become an energy efficient system with the use of cogeneration and renewable energy sources and the reconstruction of the distribution hot water network of each of these 7 systems. The expected result of the project is to increase the overall efficiency of the heating system with significant total energy savings at the level of 0.02 PJ.