2.1.5 Treatment of Building Descriptors Not Fully Addressed By This Document

The goal for this document is to provide input and rating rules covering a full range of energy-related features encountered in commercial buildings. However, this goal is unlikely to ever be achieved due to the large number of features that must be covered and the continuous evolution of building materials and technologies. Where descriptors need to be used that are not addressed completely (or are not addressed at all) in this manual, users are expected to employ these inputs using their judgment consistent with accepted design and construction practice. Any uncertainty regarding appropriate modeling assumptions must be resolved so that the impact is conservatively assessed; for example, so as to make it less likely rather than more likely that percent savings will be higher.