Basically, it is incredibly simple and cheap DIY solar panel for supplemental home heating, which heats the air directly. The most interesting is the fact that collector is almost entirely constructed out of empty aluminum cans! Housing for solar collector is made of wood (plywood 15mm), w...By: Mladen_solar
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Source: http://www.instructables.com/id/Solar-panel-air-heater-made-of-pop-cans/
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