I am now working on a project to build a stove to head up my pool. I have been googling it back and forward and still not sure how I wand to have it. I work in a mechanism workshop so I have good access to tools.
But now I need your help to work out a good design.
The pool is 700 L and the pump is pumping around 20l Per min.
I would like it to out of mix of black metal and stainless steel, where the stainless part is where the water will be heated in.