What is the correct temperature for a server room?
We're a small company with a 200 foot back room we use as a server room. It has no fans and no ventilation.
Right now, I'm running a small desktop computer as a PBX box and a Dell T605 server for general office use. (We're making heavy use of virtual machines but are basically out of capacity).
I want to add another Dell server to the room. I'm worried though about temperature.
Realistically, at what point do I need to invest in air conditioning for the room? Currently, the temperature is slightly warm when the door is closed but not excessive. How can I effectively measure the need?