Here's a quick
video that shows the basic idea and construction of my Outdoor Living
Rocket Stove Cooker/Patio Heater unit. It's really the heart of all my outdoor systems, or rather, the concept is the central concept. Obviously it can be a batch, or a windowed batch or J, or a sunken J like this one.
The sunken core is cool, I thought it would be a pain to clean but it's not bad, and cooktop height is perfect.