It's looking like this might be the year I get my pole barn - something in the 30' x 40' range. Since this has not been built yet I have the option to include something in the floor for heat and I'm wondering if anyone has run the output of a RMH under a concrete floor? I don't need to heat this up to short-sleeve temps, just warm it up to make it comfortable to work.
I'm thinking something like digging a 16" deep trench through the middle of the floor and suspending an 8" diameter pipe in it and then pouring the concrete floor. I would build the rocket stove part at one end and the exhaust would go out the other. The stove barrel would provide quick heat and sending the exhaust through a tube in the floor would warm the floor up.
I'm sure it cannot be as simple as I'm describing, so I'm looking for someone that has done this already.