Re: Electrical room ventilation.
This is a common problem. Lots of times a ventilation fan or louver just won't cut it. What I have told owners is that as long as there is nothing besides panels and xformers in the space, 100 degree room is not going to harm anything. However, if any electronics are in the space, (e.g. TVSS, fire alarm panel, etc) then there is a real issue.
Personally I try to put dry types outside. This eliminates the noise, heat, emag issues and makes for more space in the electrical rooms. However, some do not find them as attractive on the outside of the building as I do.
If the dry type must be inside, I ask the mechanical to condition the space. But a 97% percent efficient 112 KVA xfmr is a big load for an AC. Also you have to design it so that the HVAC doesn't dump heat into the elec room in the winter. This pretty much means a dedicated unit. Now that outside xfmr doesn't look so ugly....
"In this house, we obey the laws of thermodynamics" - H. Simpson.