Reply by derosa

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Posted on solar heating

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1597 posts in 3377 days

#1 posted 03-18-2012 02:41 AM

If you have a wall with lots of sun exposure there is another method that involves cutting 2 slots, one near the top of the wall and a second near the bottom. Then a cold frame is made that fits over the whole section of wall coverin both slots. The inside of the frame towards the back is lined with black tarp. The sun of course heats up the inside of the cold frame, the warm air escapes through the top slot and sucks cold air in the bottom. It is supposed to work quite well. The cold frame is sized based on the hours of light and sq ft to be heated. Just can’t remember what it is called but there are plenty of diagrams online.

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