This paper presents latest results and outcomes of a research project with focus on the thermo-hydraulic impact of decentralized feed-in in existing network structures with the resulting requirements for components like pressure maintenance, pipes as well as on the net control strategy. Furthermore, the implementation of central heat storages and their operation mode as part of the network control is considered. As a result, the simulation study provides detailed insights in flow conditions, with which requirements for system components in the network can be derived.