[en] Automatic translation: 1. Introduction: The central supply of heating has experienced a significant boom in recent years. It is also evident that the increase in the cost of Energy carriers, especially recently, have made significant arguments in favor of the far the expansion of the central heating supply. Due to the better efficiency and the greater freedom of movement in the choice of the heat transfer medium used compared to individual heating systems, the additional costs can be reduced by the Investment for a larger heat distribution and transport network and for the Compensate for any heat losses that occur. The minimum value for the heat consumption density of a certain supply area, which is necessary in order to utilize a heat distribution network sufficiently and thus make it economical, will thus continue to fall if the energy source becomes more expensive. This will make it possible to cover larger areas with lower, hitherto uneconomical consumption density via a distribution network To supply heat or to bring this heat over greater distances.