Well it appears that we are now getting air-con for the new server room. Had a lovely visit from the bursar and someone quoting for air con this morning and was told "we're getting air con for your new server room, what's your heat loading requirements" :D
Calculate current heatload, times it by 1.3, then add 50-60% again on top to cover future devices...
Have they said whether they want the heatload requirement in BTUs, or Watts?
If you are still unsure which racks to go for id be happy to provide details and a quote for the range we supply.
We do sponsor these forums so hopefully you dont consider this as spam.
I should have been clearer earlier - I'd already previously calculated our heat load when trying to justify our need for aircon :).