This module is the ninth in a series of eleven modules in an energy conservation curriculum for secondary and postsecondary vocational students. It is designed for use by itself or as part of a sequence of four modules on energy conservation in building construction and operation (see also modules 8, 10, and 11). The objective of this module is to train students in the recognition, implementation, and utilization of energy conservation for creature comfort and thermal control. First, an introduction to the module and definitions of key terms are provided. Next, the text is presented in the following three units: (1) the nature of thermal comfort in humans; (2) how natural climates and artificial environments are defined; and (3) controlling buildings for thermal comfort. The information in each unit is presented in lecture format accompanied by laboratory exercises and questions/examples for class discussion. A bibliography and several charts illustrating the text material are found at the end of the module. (BM)