EPA’s national energy performance scoring system is based on a statistical analysis of individual buildings, not campuses of buildings, with the exception of hospitals and K-12 schools.
Given a property arrangement wherein a series of buildings are situated closely together (e.g. a plaza or a campus), it is necessary to separately meter the energy consumption for each building in order to obtain separate energy performance scores and to be eligible for ENERGY STAR labels. This type of sub-metering is a more effective management strategy as it will isolate problems and target the most efficient improvement opportunities. Moreover, sub-metering also provides a much more accurate energy performance score, given that the scoring system is based on data from single structures.
Properties that have multiple towers connected by common concourse levels and/or hallways may present a different situation. In these types of properties, if there are common areas that truly cannot be divided or separated among the towers, then EPA will consider this to be a single structure. The following examples may serve to provide additional clarification: