I ran across this video while browsing utube. Kind of an interesting adaptation of an old concept. I don't have the space/time to build one at the moment, but it may be something to look into for next year at the work trailer.
Thought? Has anyone done something like this? How did it work? I have had a water heater with a similar concept. Worked well and was very efficient. That was with a glycol solution and heat exchanger though. I wonder if that might be the better route to go..
http://www.youtube.com/watch?v=2Cm-cbOWvSs
Similar one http://www.youtube.com/watch?v=VXN_1Kf18_I&NR=1
Instead of pop cans. http://www.youtube.com/watch?v=VXN_1Kf18_I&NR=1
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