Hi All, I have read som many answers regarding  the baseline system for Data centers, Some are saying use system 8 some are saying use system 3 and 4, which one is the right system? I am working on a  data center with 200,000 sqft of space with 160,000 sqft is as server rooms, now the baseline system comes at System 8 but with exception G 3.1.1 DC is a space with more than 10 BTU/hrft2 and more than 40 hrs per week of EFLH, I think based on this exception we should use system 3 and 4 depending on the heat source. Can please someone shed light on that?