Quote Originally Posted by Tim K View Post
If I find a design that works well, I was thinking I'd cut the panels out of 1/8" MDF for more durability.
A lot of good designs out there but are you sure you want to be cooking with high temps inside something embedded with formaldehyde resins? Since portability isn't a factor, why don't you use kiln-dried wood that you don't have to worry about?

Also note some of the designs for solar ovens can also be used as rdiant refrigerators at night. Heck, you can even freeze stuff with the right ambient night temperatures.