U.S. Army Core of Engineer’s Sustainable Project Rating Tool (SPiRiT) ver. 1.4.1. As part of this certification process, EMO will simulate the annual energy use of the building as-designed / Design Energy Use (DEU) model and the building as if it were designed to meet ASHRAE 90.1-1999 minimum specifications / Energy Use Budget (EUB) model. The difference in consumption between the two models is used to determine the final point total for Credit 3C.1 (Optimize Energy Performance) within the Energy and Atmosphere (EA) category.