well our was about 25 today, lots of fans on and I have 4x120mm fans from a pc blowing on me
don't help having 28 machines running 100% as there on burnin!
my o/c 3ghz dual core2 at home was running about 44% which is heating the bedroom up, however I did find throttling the cpu to 1.4 dropped it to 32 makes a big difference and if you get it right don't affect the performance to much