"Here's a little six incher built into a tiny cob cottage. The space inside is something like 100 square feet. This little guy does fine. Here's a picture of the guts. There are tight tolerances inside ... I had to open it up and carve out the cob below the barrel 3 or 4 times to get it right. That and a Peter-Channel and it works great." | Rocket Stoves.. Experimenters corner.. Answers questioned! - Six inch stove in tiny hut.