Predicted Energy Use Intensity (pEUI) describes the energy use for a project based on modeled site energy. pEUI is a modeled number and, because of the distinctions described earlier between Building Energy Modeling and Building Operation Modeling, very likely will not match actual building operations. pEUI equals the site kBtu per year divided by the project’s square footage.
[pEUI = site kBtu/sf-yr]
Source: An Architect’s Guide to Integrating Energy Modeling in the Design Process. 2012. The American Institute of Architects.