Development, rehabilitation and technologization of thermal energy supply systems have as main objective ensuring the quality and continuity of the supply services, maintaining an accessible price for the end user. Therefore, the efficiency of the system has to be increased reducing at the same time the production cost by lowering the use of primary energy resources. In this paper the results of a energy analysis, performed during an ongoing project, are presented. The conclusions of the analysis and a proposed concept are presented, while the optimal solution will result from the feasibility study.