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Old 09-28-2021, 11:18 PM   #3 (permalink)
rmay635703
home of the odd vehicles
 
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Join Date: Jun 2008
Location: Somewhere in WI
Posts: 3,563

Silver - '10 Chevy Cobalt XFE
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My father built a solar heater in the 70’s it was an insulated wooden triangle with a flat black aluminum sheet, a small Airgap with a translucent plastic lense

He used a simple in out air duct with a thermocouple and a small fan that would suck air from the top into the ceiling of our house.

It would make heat year round and he would simply cover it with white foam in the summer
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