Does anyone know what could be in this room:
My only guess is that it’s where things like company records & other such important documents are kept so that they’re protected in the event a fire breaks out.
That’s where they store the fire.
Sprinkler risers maybe?
Fire vaults are typically either a fire safe room or an area to store all important papers or things of the like. Fire risers must be labeled as “Fire Riser Room”