Enough oxygen comes up from below to keep the embers alight, but not enough to sustain a flame.
This stove is incredibly efficient because it practically sustains itself on the ashes and gases its producing.
The ashes recirculate after primary combustion and stay lit like charcoal.
Your best bet will be a dirt patch with no vegetation nearby or a rock.
For a complete step-by-step guide, check out the link below.
Wood Gas Camp Stove| Make
Photo byWilliam Abernathy.
