LArge date centers: what are they like inside?

I was just looking at the pics of Rackshacks facility and I was wondering a few things that maybe someone can answer as I've never been inside a facility that large:

- what is the noise like? I suspect it will be fairly quiet with a soft hum with all the fans but have no idea.

- what does it smell like? Weird question I know but I'm guessing it has that 'electrical' type smell.

- is it cold in there or just normal temp?

 

 

 

 

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