So my dad replaced his wood stove in his shop last year with a bigger one, and is getting rid of the older one. He asked if I wanted it, and I turned him down, but now I'm reconsidering... The opening is about 12"x12", and will burn logs up to 30", with a 6" exhaust. He used it to heat the insulated shop (around 1500 square feet) I figure it would be a quick start to a trailer smoker. I'm just curious if there would be any drawbacks to it. I have my choice of a couple old tanks to use as well, one about a 200 gallon fuel tank, and one 300 gallon one. Does the flow calculator handle sizing as well? Would I want the same size exhaust out of the smoker as what comes out of the stove (6") I'll try to get some pictures tonight to show you what I have to work with.