Solar Thermal Systems summarizes the theoretical and practical knowledge gained from over 20 years of research, implementation and operation of thermal solar installations. This work provides answers to a variety of key questions by examining current solar installations, drawing upon past experiences and making proposals for future planning. - how do system components and materials behave under continuous operation? - which components have proven themselves and how are they used properly? - what are the causes of defects and how can they be avoided? - how long is the service life of modern solar installations? - what is the difference between the various solar collectors? - what performance can be expected from solar installations? - how are solar installations planned and structured correctly? In addition to practical recommendations on implementation, the theoretical background is also clearly explained. This book is a valuable guide for all those who deal with solar technology and at the same time a reference for the daily work of planners and fitters. It will also prove a useful tool for training and education.