My Father worked at the Climatic Laboratory for many years. They had rooms large enough for a fighter, which could be taken down much colder than that. 200 below zero sticks in my mind but I could be wrong.
I think it must have been constructed in the 40’s or 50’s. yes they have a lot of insulation and some pretty big compressors.
My Dad built managed satellite programs for a living and used to show me the thermal simulators and shake tables. Gigantic rooms with thousands of lights that would heat up one side of the satellite. Really impressive stuff. My favorite was watching the shake tests where they would sweep through the frequencies that occur during launch. The folded solar panels would really flop around when they hit 10 Hz or so.