This curriculum guide contains 17 units that provides the basic curriculum components required to develop lesson plans for the heating, air conditioning, and refrigeration curriculum. The guide is not intended to be a complete, self-contained curriculum, but instead provides the teacher with a number of informational items related to the learning outcomes and allows the teacher flexibility to design instructional activities, select resources, and deliver instruction most appropriate for the learner and learning environment. The units of instruction contain the following components: learning outcomes; associated tasks; performance standards; lists of tools, equipment, resources, and limiting constraints; performance steps; and enabling objectives. The units cover the following topics: tubing, fitting, soldering, and brazing; basic compression refrigeration; domestic refrigeration; introduction to electricity; electrical components; electric motors; wiring diagrams; window air conditioners; residential and commercial air conditioning; commercial industrial air conditioning; commercial refrigeration; gas heating; oil heating; electric heating; heat pump, solar, and hydronics; dehumidifiers and humidifiers; and heat gain, heat loss, and duct design. (KC)