This terminology consists of terms and definitions pertaining to the description, measurement, prediction, improvement, and management of buildings and building-related facilities, and, in particular, terms related to the standards generated by ASTM Committee E06 on Performance of Buildings . The purpose of this terminology is to provide meanings and explanations of technical terms, written for both the technical expert and the non-expert user. This terminology is one of a group of special terminologies, subsidiary to the comprehensive terminology E 631. Terms are listed in alphabetical sequence. Compound terms appear in the natural spoken order. Where definitions herein are adopted from other sources, they are copied exactly. The source is identified at the right margin following the definition and is listed in Section 2. The equivalent term in French is listed in parentheses after the English term.