This minicourse was prepared for use with secondary physics students in the Dallas Independent School District and is one option in a physics program which provides for the selection of topics on the basis of student career needs and interests. This minicourse was aimed at providing students with a knowledge of the physics factors that determine the sensation of climatic comfort and the energy requirements for maintaining this comfort. The minicourse was designed for independent student use with close teacher supervision and was developed as an ESEA Title III project. A rationale, behavioral objectives, student activities, and resource packages are included. Student activities and resource packages include defining temperature, calibrating a thermometer, defining heat, investigating conduction, connection, radiation, specific heat, heat of fusion, insulating material, humidity, and dew point, and calculating heating loads. (GS)