The Beer Can Solar Heater is easy to make as well as eco-friendly. You can heat your home and lower your heating bill with an easy-to-build solar heater made out of empty beer cans, cardboard and cellophane wrap.
The Beer Can Solar Heater works on the same principals as a passive solar heater. The cans absorb the sun's rays, causing the air in the cans to heat up and rise. As the hot air rises, cool air is pulled from the floor to be heated again by the sun.
DIY Solar Brewers
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By: Michael Poppenhagen - Published: Oct 5, 2010 • References: squidoo