I’m new to the group. I’ve recently purchased a large pole barn…with a little house…lol. I’ve still got to weather proof it, as well as insulate it. In checking out some of the other posts, I have a question. If I was to install a double barrel stove, but were to modify it with fire brick inside the lower barrel, and sand with the flue pipe running from end to end embedded in the sand, would this be a way to increase the thermal mass, and have the upper barrel give off heat long after the fire has gone out?