The stated purpose of this publication is to present a large amount of relevant data on energy use in an easily retrievable and usable format. The following topics are covered in eight chapters: (1) sector definitions; (2) buildings inventory; (3) appliance inventory; (4) heating and cooling units inventory; (5) appliance efficiencies; (6) structural characteristics; (7) climatological data and appliance fuel use; (8) national economic and demographic determinants; (9) fuel consumption and prices; and (10) a survey of selected energy studies. A list of data sources is provided at the end of each chapter, and a more general bibliography is included at the end of the book. This publication endeavors to fill a need for a definitive compilation of residential/commercial energy use data. The data presented are considered to be the most reliable data available and for the most part estimates are excluded. Tables compiled through diverse sources present the data and when necessary explanatory text or graphs accompany the tables. A user's guide and a glossary are included. (Author/MR)