Heat exchanger is the key element of modern heating systems, In this thesis we analyzed the dynamics of a plate heat exchanger using a high-speed infrared camera. We set up measuring stripe? that allowed us to monitor the non-stacionary temperature field on plates of two different plate heat exchangers. During the measurments we changed positions, connections and flows at the inlet of hot and cold water. We have dimensioned appropriate heating system for the sports hall and carried out the installation of floor heating. In the cost analysis, we determined investment differences of different heating systems that use renewable energy sources.