This is an excellent example of up-cycling old stuff and creating something really practical & useful from it…
“After our first attempt at a home built proof of concept solar thermal panel, we were a bit disappointed with the results.
It took about 4 hours before the thing started work, and was a bit costly (at over 50 dollars) to make.
I knew it could be done better and cheaper.
My first mistake with the first one was purchasing everything new.
With ample reusable resources at the local town dump I knew it could be done on the cheap”…