Standard 90.4 meets the needs of the data center industry primarily because it is a performance-based standard, intended to be used by designers and constructed for realistic verification by AHJs. It also encourages innovation by focusing on overall system performance and allowing offsets between mechanical and electrical system efficiencies to achieve overall site infrastructure efficiency goals. And in keeping with overall energy conservation goals, it enables credits for both on-site and off-site renewable energy sources, as well as process heat recovery designs for on-site or export to adjacent sites. In short, it ensures energy efficiency achievement while also being specifically geared to the highly unusual and very demanding data center industry.