rapidly down to much lower temperatures, which are not so good to recycle. It is possible, that you put another valve in the water return, so you can catch the hot water.
Better source of heat is the condensate return line, mostly always very hot, arround 100degrees celsius. you can put a heat exchanger inside, and connect it then to the heating
system of your house etc. good to have the plant near a castle, which needs a lot of warm water for heating
