you wouldn't need an air feed as the ground itself that
surrounds the pyramid will feed air down to the surface of
the ground water , and the vacuum is produced by removing
oxygen from the air as the fire burns.

and since there is a water well at the bottom of the pyramid
then the vacuum ( caused by the fire ) would pull water up into the passageways.

the water would not lift with the heat rising from the fire
and its a good thing that I didn't say that it would.

3/4 inch of dust build up on the moon in 4.527 billion years,LOL and QM is fantasy science.