Point: 2.1 How are the distribution losses to be calculated for two-pipe systems (space heating, hot water)?

The temperature in the flow and return pipes for decentralized heat supply is usually determined by the hot water. Accordingly, the length of the distribution and riser pipes for space heating should be assumed to be zero meters. The total length (of the two-pipe system) should be assumed for the length of the hot water distribution and riser pipes.