This trade and industrial curriculum guide is intended for use in vocational programs that prepare students to enter the air conditioning/refrigeration field. The introductory section provides a statement of philosophy, objectives, block time schedule, and recommended facilities and equipment. Following the introductory section, eighteen blocks of instruction are presented: (1) Orientation; (2) Refrigeration Tools; (3) Copper Tubing and Fittings; (4) Electricity; (5) Air Conditioning and Refrigeration Fundamentals; (6) Compression Systems; (7) Compressors; (8) Evaporators, Condensers, Receivers, and Other Components; (9) Refrigerants; (10) Refrigerant Controls; (11) Domestic Hermetic Refrigerators and Freezers; (12) Window Air Conditioning Units and Residential Air Conditioning Systems; (13) Commercial Air Conditioning Systems; (14) Commercial System Controls; (l5) Absorption; (16) Automobile Air Conditioning; (17) Heat Pumps; and (18) Heating Systems. Each block provides a table that lists the units of instruction, informational content of each unit, and skill development activities. In addition, a list of instructional aids is provided for each block. Appended material includes a unit guide example, a list of safety precautions, suggestions for shop management, and additional references. (LRA)