This is the final report of Subtask D-1, “Use Cases and Dissemination” of the IEA SHC Task 68: Solar Heating Systems. The work has involved literature studies and data collection from Solar District Heating installations as well as interviews with district heating companies and collector suppliers, with the goal of proving the performance of operational Solar District Heating installations to the industry and public. In addition, emphasis has been placed on drivers and challenges for each installation to give a better understanding of the current challenges related to implementation of solar thermal in district heating networks. In this study, Solar District Heating installations with different characteristics such as heat storage concepts, collector technologies and heat production synergies are investigated.