solar can-stack-box to warm your house for 15 bucks
October 20, 2008 § Leave a comment
Some clever guy at blog.hemmings.com has built a solar-heater based on soda cans painted black, inserted in a wooden box, covered by glass, you know, the usual stuff. What’s pretty amazing about his ideea is that for 15 bucks you get air 15 degrees warmer than the air inside.
Made thinner it would make some perfect exterior windows blinds that open-up rotating to be perpendicular to sun-rays.
The big picture after the break: