This design guide is for K-12 school buildings, and applies to all sizes and classifications (elementary, middle, high). Space types covered include administrative and office space, classrooms, hallways, restrooms, gymnasiums and multipurpose rooms, libraries, and food preparation and dining areas. The Guide establishes a set of energy performance goals for achieving zero energy. The goals are provided for all ASHRAE climate zones, in both site and source energy. Strategies on how to achieve these energy targets are provided throughout the guide.