So I wonder why it has to be stored at -90F. That’s awfully darned cold. It requires two or three stage compressors. And just as curious, why does the Moderna vaccine not require that extreme of low temperatures?
Back in the 80s, I operated a guarded hot box (an apparatus used to measure heat loss of wall sections and fenestration) that was capable of temperatures down to -55F. The refrigeration unit was very expensive, fairly complicated to run, and took over an hour to achieve -50F in about 120 cubic feet of space. I’m sure cold technology has improved since then, but still, those type of freezers have got to be expensive and, I expect, temperamental.
