Refrigeration and Air Conditioning Author:Air Conditioning and Refrigeration Institute Helps prepare readers for the Federally required (EPA) Certification for technicians. Exceptionally comprehensive, authoritative, up-to-date, and well-illustrated in full color. It focuses on accepted and expected industry practices applicable to a wide variety of HVACR jobs. For anyone interested in Basic Refrigeration, Commercial Refrigerat... more »ion, Residential Air Conditioning, Commercial Air Conditioning. Warm Air Heating, Hydronic Heating, HVAC Control Systems, and Servicing HVAC Systems.« less