GFS build questions
Hey everyone, i'm kinda excited. I'd really love to build a gravity feed, and I've got a line on an old enamel coated 1950's fridge. Now, is this do-able, and if so, should the fire box still be 1/3 the area of the fridge? I was also wondering about the exhaust. Am I better off cutting a hole in the back or sticking a pipe down through the top a little ways? I have that pit builder calculator bookmarked, or is that only for horizontal builds?