Hi thank you for the replies
I live at the foothills of the western slope of the rockies mild winters for the most part but it gets cold (is snowing now..). The picture shown is the bottom floor, and concrete foundation and would be able to support the new mass. The room to be heated is somewhat of a glorified loft a-frame. about 7000csf of space. i am mostly worried about the proper insulation for the existing structure cob/drywall juncture as to not burn it down..