The other night, I had a dream about a RMH that someone had built and was in operation. It was smallish and looked relatively portable, and I remember thinking (in the dream) how neat it looked, but how did that work without a riser going up?? LOL!
Matt Walker has developed what he calls a "riserless core", which essentially runs the riser horizontally while achieving the same complete combustion. It does depend completely on a well-drafting chimney to work properly.
Invasive plants are Earth's way of insisting we notice her medicines. Stephen Herrod Buhner
Everyone learns what works by learning what doesn't work. Stephen Herrod Buhner