Hal in the Pump Room

On the engineering diagrams the Pump Room's maybe about twenty meters directly beneath the centermost courts in the middle row of courts, and looks like a kind of spider hanging upside-down—an unfenestrated oval chamber with six man-sized curved ducts radiating up and out to exit points on the grounds above. […] The intake fans pull ground-level winter air down into and around the room and through the three exhaust fans and up the outtake ducts into networks of pneumatic tubing in the Lung's sides and dome: it's the pressure of the moving air that keeps the fragile Lung inflated.