New buildings and renovations are increasingly expected to meet environmental and sociopolitical goals such as being "green," "energy efficient," and "sustainable." While these efforts are laudable, occupant health and safety often is not the primary objective, and short-term fiscal gains often supersede consideration of long-term risks and benefits. As a result, the performance of many of these buildings has been less than expected. This book will stress the importance of accurately measuring building performance for long-term health and sustainability. Principles for designing and diagnosing building performance will be explored, and numerous examples and case studies will be presented.