Traditional Russian Fireplace labyrinthine brickwork, one of the earliest forms of masonry stove. They are substantially more efficient than open fires, but with limited air regulation waste a lot of heat up the flue when the fire is out.
The Onil Stove. Better than a 3 stone fire for sure! It seems quick and easy to put together. I think I'm suppose to be amazed but I don't find it as impressive as, say, the Justa stove. Or the impressive Uganda stove.
an original design incorporating the efficiency of a rocket stove into the design of a pizza oven This will reduce the amount of fuel and time required to heat your oven and also stops the oven from spewing smoke out constantly. It burns almost perfectly