Luke, the reader who’s doing our Facebook fan page, sent me this amazing story. It’s all in Russian and I haven’t translated it yet. They built a mass heater/fireplace into the earthbag wall. The thick earthbag wall is the mass.
Rough translation of a few snippets:
Earthbag house with a brick oven in the suburbs. Architect Ilya Sibiryakov.
Practice has shown that adding water [to the soil/cement mix in the bags] is not needed – in a bag rammed mixture acquires the hardness of the stone (subjectively) a day. Tamped layer 4. It comes time to determine the final dimensions of the furnace and flues. Furnace – right tube – on the left, lying between the flue pipe. Before proceeding with the construction of the walls should be planned to test the oven. Dry stacked oven works just as it was planned – enough thrust to smoke escapes through the chimney. At the same time lying channel has a bias [slope], ie, it is not horizontal.