An interesting concept for heating water with recycled and low cost parts.
http://www.thesietch.org/projects/solarthermalpanel2/index.htm
This is a companion discussion topic for the original entry at https://peakprosperity.com/diy-solar-thermal-panel/
Some great info on larger scale and other similar DIY projects here:
http://www.builditsolar.com/Projects/WaterHeating/water_heating.htm
http://www.builditsolar.com/Experimental/PEXColDHW/Overview.htm
Nice job coming up with this kind of useful information, Denny!
Ja…it's a great site…especially the detailed documentation of the owners projects…a smart guy who has built a lot of DIY solar projects, documented them well, and compassionately sharing his experience.