PSI Texas Environmental Air - Class A Exams are based on the most recent edition unless otherwise specified below. TX BUSINESS AND LAW REFERENCE LIST Texas Air Conditioning and Refrigeration Contractors License Law, Texas Occupations Code, Chapter 1302 Texas Air Conditioning and Refrigeration Contractors License Rules, Texas Administrative Code, Chapter 75 OSHA CFR 29 Part 1904 Recording and Reporting Occupational Injuries and Illnesses, OSHA Washington, DC CODE REFERENCES Uniform Mechanical Code, 2021 Edition, International Association of Plumbing and Mechanical Officials. International Mechanical Code, 2021 Edition, International Code Council, Inc. International Fuel Gas Code, 2021 Edition, International Code Council, Inc TECHNICAL REFERENCE LIST Modern Refrigeration and Air Conditioning, Althouse, Turnquist and others, Goodheart-Willcox Publishers, 22nd Edition, 2025, ADI Duct Size Calculator, Air Distribution Institute, www.steelduct.org The following three references are used for Environmental Class A and Class B examinations only: Manual D - Residential Duct Systems, 2014 Edition, Air Conditioning Contractors of America (ACCA), www.acca.org Manual J - Residential Load Calculation, Eighth Edition, Version 2.50, 2016, Air Conditioning Contractors of America Manual S – Residential Equipment Selection, 2014 Edition, Air Conditioning Contractors of America (ACCA) You can find the Candidate Bulletin here.
