This public domain online calculator for solar district heating (SDH) systems is available for interested market actors as an easy accessible and user friendly calculation program for a first dimensioning and forecast of performance and economical values for solar district heating systems.

The calculator was developed based on numerous and detailed dynamic system simulations with the simulation program TRNSYS and under consideration of a large number of influencing factors. Calculations are possible for the distributed and centralised system concepts listed in the selection box.