I just finished building one for a friend , 1/4" steel 30"x30"x32" tall. the fire box is 7.1 cubic ft. It's a top loading down draft style with lots of fire brick. It' an airtight design. It's a beast of a stove, works better than expected. It will hold 500* stove temp with 200* flue temp for 30 hrs. he is heating his 10,000 sq ft machine shop with it. the only wood it's seen so far is seasoned pecan. we are getting ready to retro fit a stainless steel honeycomb combustor in the flue camber. I'm just about done with another one for my shop, it will have a 2.6 cubic ft fire box . His stove is burning very clean with only very fine ash on the inside. with it running at 500* very slight visible smoke from the flue, thinkin the stainless honey comb will solve that. very impressive stove so far, very heavy also at 750 lbs. should last several life times. Hope this helps.
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