I love to see an interior design schematic in order to se how the heat and smoke flows throughout the unit.
If you click on the photo, it will take you to photobucket with a whole bunch of pictures of the build. The burn chamber is almost a cube, with 3 chambers.
The first is the firebox. It is 13-1/2" tall, 18" deep, and 7-1/2" wide. It has one exit in the right-hand sidewall all the way at the back. The opening 9" tall by 2-1/4" wide, and is even with the floor if the firebox. This leads to chamber 2. Right in front of this opening is a vertical piece of 2" schedule 40 pipe, with ~1/4" slit top to bottom that faces the opening. Fresh air is piped to this tube all along the bottom of the firebox (to pre-heat the air).
Chamber 2 is a mixing chamber that is 13" tall and about 6" square (can't remember the dimensions off the top if my head). The passage from the firebox to this mixing chamber has a 3/8" slot in the top of it where exhaust gas is re-circulated back in (venturi effect) to aid in complete combustion. This chamber sees more of a cyclone swirling effect for the mixing of the gasses. At 90 degrees from the inlet to this chamber, is the outlet (so it is facing the front of the stove). The outlet is also 9" tall, but it is only about 1-5/8" wide. This produces really high velocity where the gasses enter the final burn chamber. This opening also has a slot in the roof for recirculating more exhaust gases back into the burn.
We now arrive to the 3rd chamber. It is approximately 7-1/2" wide, by 8-1/2" deep and is leads all the way to the ceramic glass cooktop (~2 feet tall). This is where the main burn happens. From this point on, the gasses must follow a cursive "n" (with a tail) path under the cooktop to the rear of the stove. When the bypass is open, the gasses can go straight to the chimney. If the bypass is closed, then the gasses must travel all the way to the bottom of the stove in a open chamber immediately behind the firebox. From there the gasses enter the large open oven area of the stove. From there, the gasses have to travel back down to the bottom of the right-rear corner to get into the vertical flue. This allows the hottest gasses to be held inside the thermal mass, and only the coolest gasses to get to the chimney.
From a cold start, the oven takes 30 minutes to get to the 400 deg range, and the stove will reach max temperature at about 2 hours of burn. At this point, the oven will be nearly 700 deg f.
