Where does “Wärmetauscher” come from?
Wärmetauscher (German) comes from German Wärme, from Middle High German werme, from Old High German warmī, from Old High German warm, from Proto-West Germanic warm, from Proto-Germanic warmaz, from Proto-Indo-European gʷʰer-, from Proto-Indo-European gʷʰe-gʷʰór-e ~ gʷʰe-gʷʰr-ḗr.
Wärmetauscher (German): heat exchanger
Ancestry of “Wärmetauscher”, step by step