In an early job, it was decided that the MicroVAXen would live in a cupboard behind the reception area.
A sparky from HQ was duly sent down to sort out "aircon" for the cupboard.
He fitted one of those little extractor fans people use in toilets, with a thermostatic control.
Unfortunately, he wired it all up so the fan stayed ON until a certain temperature was exceeded.
One unusually warm Easter weekend later, the whole cluster got cooked.