Posted by hipstomp | 29 Apr 2008
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This is a fairly amazing hack--this guy used soda cans, barbecue paint and leftover wood to make a solar heater for his garage. Without using fluids or pumps, this thing kicks out air that's 15 degrees warmer than what it takes in. Fifty bucks up front, then free solar heat for as long as the box is out there!
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