In this pic, I had the fan inside. That did not work at all. It just blew really hot air from the burning hot metal tin.
I then cut a large opening on each side on this lean to thing, and inserted the fan. This way it blew air from the outside instead of the air that was being heated by the tin.
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Your right, it sure felt like an oven before I altered it.
I will post pics:
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Btw I did not build this originally. We just had to make do with what was already there!