I'd only want this in my tiny house if I could have it fit in gracefully and not overtake the whole space. The front area is only 5 feet long. Current floor plan has the Cubic Mini Cub drawn in, but I prefer a rocket heater. A rocket heater may not fit well in that same spot, but perhaps on the other wall to the right. Right now it's allocated to storage cabinets but the plan could be reworked.
Open to feedback from those more knowledgeable than me. Would clearances allow me for me to fit one in gracefully? If so, any suggestions on a good rocket heater plan?
Note that this does not have to be my primary heat source. I will also have propane.
I wouldn't try to use a 3" stove like that in your place, but a 4" version with minimal mass to mitigate instant heat and stretch out the delivery by a couple of hours might work. I would build the whole thing outside, testing variations on size and volume and area of different parts to get it as good as you can, and then move it inside. A 4" version of a J-tube is going to need feeding every 10-15 minutes, but tending it for a couple of hours might keep the space warmish for half the night. If parts are 4 or 5" of cob walls encased in a metal shell, it might even be warm until morning. I would be sure to run the exhaust straight up to get all the draft you can.
Batch box technology (which didn't exist at the time that thread started) might be able to get a really useful RMH in 4" or slightly smaller size, at the cost of distinctly more complex and exacting build requirements. See batchrocket.eu for details.
In the end I have decided to nix idea of RMH in the tiny house. Main reason is that I want to have it insured and this would get in the way of me being able to get coverage. Perhaps one day I can build one in a cabin of something (they are so cool)! But for now will do a tiny wood stove.