The efficient, economic and environmentally safe operation of the power system is contingent upon the determination of parameters in the system's interaction. The heat/cooling source, distribution and transmission of energy are interdependent, and the determined parameters influence the operation of each component of the whole energy system. First, we establish the basic parameters for the design of the heat/cooling source and the integrated energy system of the building within the in-situ laboratory. The parameters are related to their location, and the aim is to investigate the impact of changing these parameters on the operation of the energy system. Furthermore, the monitoring of alterations in these parameters is undertaken to assess their impact on the energy efficiency of the system. The operational range of the energy system has been delineated in two modes: heating and cooling. The objective of the present investigation is to achieve the optimal operation of the system by defining the energy flows from each set of the energy system. To this end, the experimental laboratory has been equipped with a digitising system that includes the energy system and its parameters. The digitization of system parameters facilitates the monitoring of the mutual influence of individual parameters on energy flows in the system and their transfer between components. The primary objective of the research endeavour is to optimise the operation of the energy system with the maximum utilisation of RES.