There are mechanical equipment rooms on the 28, 52 and 90 ft levels - I`d guess they are here somewhere. There is nothing higher per se where this equipment could be. All ride and show. It does make you wonder if all the equipment was made small enough to be removed via the entry/exit tubes - the side hatches are at best doorframe sized. Incidentally, the side hatches were designed more to allow access to the gutter system for cleaning.Well, one litmus test..
Marni, would you need a crane to work on SSE's air conditioning or air handler room? Where is it located?
Also, on the roof above the rubber membrane and below the alculobond are at least 3 air venting units.