This manual was prepared primarily for use in conducting a practical training course on the design of solar heating and cooling of residential buildings. The text is directed toward sizing, installation, operation, and maintenance of solar systems for space heating and hot water supply, and solar cooling is treated only briefly. The solar systems described in this manual are primarily for residential applications and one- and two-story office-type buildings. This manual was developed by the staff of the Solar Energy Applications Laboratory and vocational education specialists at Colorado State University in cooperation with the NAHB Research Foundation. A national advisory committee selected from various sectors of the home-building industry, university sources, private practice, and government, was established to provide advice and general guidance.