I saw this post on Instructables called Solar Thermal Water Heater For Less Than Five Dollars
Obviously it is going to cost more than $5 to be able to actually use this for something, but I had never thought of using the coil from the back of a refrigerator as the tubing inside a flat plate collector before. Dont get me wrong, I find junk laying around all over the place and love to think up ways to use it, this is just one piece of junk I hadnt considered for a flat plate solar hot water colle....
Do It Yourself Solar
