This may seem like a dumb question… air enters the bottom of the stove and seems to go through a rectangular manifold in the middle rear of the firebox up to the secondary burn tubes. Is that it? Does air enter anywhere else? Is there an air wash to keep the glass clean? Does the air from the air tubes air wash the glass? It seems like a well made stove. I didn’t get a chance to try it yet. I need to replace the ceramic baffle board before firing it up..