This book on energy-conserving building design has been completely updated. It aims to give detailed guidance on using local climate and site conditions for optimum energy design - in all types of buildings and in all regions of the United States. Architects, builders, engineers and developers should find indispensable, site-tested strategies for maintaining climate control, promoting solar gain, minimizing conductive heat flow and infiltration, enhancing ventilation, and choosing the best cooling and roof systems. The useful "Practices" section contains several examples of completed projects, supported by detailed climatic data and hundreds of illustrations.