Building Information Modelling (BIM) in the Architecture, Engineering, and Construction(AEC) sector allows for significant improvements in working efficiency throughout the entire life cycle of a building and has become mandatory in many countries. This process necessitates a greater understanding of the entire system from engineers, technicians, and facility managers, resulting in a greater demand for appropriate educational methods involving system simulation. The simulation of building energy services includes determining the network structure for medium transport, which is often not included in the BIM-model. This paper describes a workflow for determining the structure of a component-based geometrical model of a building energy service involving medium transport automatically. The workflow can be divided into three stages: identifying connected components, determining valid connection paths from a starting point to an end point, and determining the initialized flow direction of the transport medium within the system as well as the network structure. The depicted solution includes the workflow’s implementation and integration into a virtual reality environment for educational purposes. This approach has been validated through various exemplary generated test systems and allows for the realization of flexible educational use cases.