Our work place is pretty bad for it. I think, when it was originally an electronics place, it was one of the sickest buildings in Europe.
Two things you don't want for an electronics assembly line - humidity and EF interference.
So I spend all day with next to no mobile reception thanks to the Faraday cage (they've holed it in a couple of places, but still) and my hair went crazy and I was drinking way more than usual thanks to the humidity controls.
They're awful though - once all the students have left, that's when the air conditioning kicks in. Not for the 4 weeks before, when the windowless, stifling rooms are full of panicking students, no. We'll wait until it's just staff marking work to chill the rooms to minus 15°, because... Hell I don't know what they're thinking. Morons.