Current project- large contraflow with updraft channels

This is the new heater just under construction as of this week. Drawing to the right is a Sketch-Up image showing the proposal for a large clay plaster finished heater. There will also be some decorative tile details on the finished project. The structure goes floor to ceiling in a 9 ft high room. It backs up to a wall which is the sidewall for the stairwell to the second floor. The central firebox/bake oven structure is the "guts" of a typical contraflow. The wide extensions to each side hold updraft channels. The gases will join in a smoke chamber above the main heater body and then enter a class a chimney pipe. The main heater body comes into the room 2'-8", while the extensions are just 16" wide. This design allows for a large but compressed heater footprint in the room, freeing up space for a dining table and movement space.