Unnamed Administration sources reported that Michael Dillon said:

My experience is that electronic/computer type equipment runs best when it
is in a cool environment, i.e. too cold for a human in T-shirt to work in
for very long. And when the ambient temperature gets above room temp, then

True. And recall that 15C in will be a lot more coming out.
But colder always costs more money.

you get too many wierd and unexplainable problems occurring or just plain
equipment failure. Sean Donelan is right to worry about condensation and I

I'm less sure. IMHE, anything running will not promote condensation.
It will be warmer than ambient.

You DO need to be concerned over too LOW a RH -- for the obvious
reason.... static hazard.