Cheap and Easy Solar Heater
by Lloyd Alter, Toronto 
on 11.23.07
It doesn't get any easier than this. Take that jar of pennies you have kicking around, a sheet of foamcore and some plexi, and in no time you have a heater that the guy on the video says will warm up your room by ten degrees. It's kind of cheesy looking and will not add much to your room's decor and ambience, but we can work on that. via ::Lifehacker
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