Today I finished building and fired up the rocket mass heater for the geodesic dome. Ironically, it's January and we're having record breaking warm temperatures in the 50's but I couldn't resist and started it up. I will do a full video about the construction in the future, but wanted to share a few pictures of it. This heater is a bit different than some you may see. I wanted to be sure there was enough drafting in the chimney so I doubled up the barrels.