Hey ya'll! I made this solar oven durring the summer. I drug it out to try it in really cold weather. luckily it went well. if you wanna see how i built it, you can veiw my other videos on my youtube channel http://www.youtube.com/user/threefloorsdown1
There are many of these used in the upper midwest but then they were invented in Wisconsin. I cook with mine in the summer for long term roasts or good barbeque ribs. Another great item for cooking is a linear fresnel lens cooker.