My solar panel is actually the south wall of the building, it's 11.5 x 30 and covered with clear Lexan like you get in snowmobile goggles except it's corogated for use as sheeting on a building, I chose Lexan because it's pretty much unbreakable and supposed to never yellow, behind the Lexan is a 3 inch air space, then flat steel painted black, then 6 inches of fiberglass insulation, the inside wall is sheeted with blandex, there are 2 6 inch openings that run the length of the wall, one opening at the top and one at the bottom , when the sun shines through the Lexan and hits the black steel the air gets heated, heated air naturally rises to the top so I have warm air coming out the top 6 inch opening and cooler air from inside the building is drawn into the bottom, no moving parts, i think it all works incredibly well. I built it in 1992 and so far it's been maintenance free, if I was building a new shop I would most likely do the same thing again. I will try to take some pictures and post them
This morning at 10 it was 34 degrees outside and 80 degrees in the garage about 2 feet from the ceiling where I have a great big thermometer hanging. Occasionally it gets uncomfortably warm but all I have to do is open the door for a few minutes and it cools off very quick. One thing I really like about the solar circulation is the inside of my garage is always nice and dry, never damp.
Last edited by cycledude; 12-06-2015 at 12:07 AM.