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You can either go for a 1 ton AC or a 1.5 ton AC depending upon the amount of light that enters the room, area and direction of windows, the floor on which your room is situated, number of people occupying the room and the number of lights.
May 16, 2012 at 9:19 UTC. My server room had 10 servers, 5 switches, router,firewall,etc. and had a 1-ton unit. When it worked, the room was cooled plenty. Now that 1-ton unit is more than enough for my 2 virtual hosts and networking equipment.