This course is designed to guide apprentices, entry-level technicians, and first-year students through their first experiences in the HVACR Trade. It provides a solid and thorough introduction to the field. It is the culmination of the efforts of industry leaders like the Air Conditioning Contractors of America (ACCA), Plumbing-Heating-Cooling Contractors Association (PHCC), and Refrigeration Service Engineers Society (RSES). It provides simple concepts that provide an overview of the world of HVACR and its main systems and components. Coverage then progresses to increasingly complex procedures, such as maintenance and inspection, installation and repair, and customer service and sales.