The high-temperature heat exchanger has a very good exchange ratio of around 87 %, and thanks to innovative materials, it is able to cope with inlet temperatures for 1000°C. This is around 200°C more than most metal series heat exchangers. The heat exchanger is not only characterized by its high temperature resistance, but also by its resistance to the chemical effects of the combustion gas. The flow-optimized design can be scaled to different power classes.