Prepare for ASE Certification and master the principles, components, diagnosis, and repair of modern automotive heating and air conditioning systems with TODAY'S TECHNICIAN: AUTOMOTIVE HEATING & AIR CONDITIONING, Sixth Edition. This integrated, two-book set covers theory and hands-on content in separate Classroom and Shop Manuals, allowing you to learn fundamental climate control theory, including basic physics related to heat transfer, before applying your knowledge through practical, hands-on shop work. Cross-references in each manual link related material, making it easy to connect classroom learning to lab and shop activity. Updated to reflect the latest trends, technology, and relevant NATEF standards, the Sixth Edition includes new material on the newest refrigerant R-1234yf (HFO-1234yf) covering both the theory and service of the latest systems, as well as a bold, full-color design for enhanced reader appeal.