{"product_id":"texas-environmental-air-class-a-contractor-book-package","title":"Texas Environmental Air Class A Contractor Book Package","description":"\u003ch1 style=\"color: #d32f2f;\"\u003eTexas Environmental Air Class A Contractor Book Package\u003c\/h1\u003e\n\n\u003cp\u003ePrepare for the Texas Environmental Air Class A Contractor examination with a comprehensive collection of business, law, mechanical-code, fuel-gas, refrigeration, air-distribution, load-calculation, and equipment-selection references. This book package brings together the materials needed to study the major knowledge areas covered by the Texas Environmental Air Class A examination and to build efficient open-book reference-navigation skills.\u003c\/p\u003e\n\n\u003cp\u003eThe Texas Environmental Air Class A license is administered by the \u003cstrong\u003eTexas Department of Licensing and Regulation (TDLR)\u003c\/strong\u003e. A Class A Air Conditioning and Refrigeration Contractor license allows a license holder to work on systems of any size within the authorized endorsement. The Environmental Air Conditioning endorsement covers the treatment of air to control temperature, humidity, cleanliness, ventilation, and circulation for human comfort.\u003c\/p\u003e\n\n\u003cp\u003eThe current Environmental Air Class A examination is administered by \u003cstrong\u003ePSI\u003c\/strong\u003e. The exam includes \u003cstrong\u003e120 scored questions\u003c\/strong\u003e with \u003cstrong\u003e230 minutes\u003c\/strong\u003e allotted for the scored portion, plus \u003cstrong\u003e5 non-scored questions\u003c\/strong\u003e with an additional 10 minutes. The required passing score is \u003cstrong\u003e70%\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cp\u003eThe examination is broad. Candidates are expected to understand air distribution, refrigeration components, combustion air, controls, equipment requirements and design, HVAC systems, piping, refrigeration principles, safety, service, testing, Texas laws and rules, ventilation, and venting. Preparation should therefore combine technical HVAC knowledge with familiarity with Texas licensing law and contractor regulations.\u003c\/p\u003e\n\n\u003cp\u003eEffective September 1, 2026, the Texas Air Conditioning and Refrigeration examinations reference the \u003cstrong\u003e2024 International Mechanical Code\u003c\/strong\u003e, \u003cstrong\u003e2024 International Fuel Gas Code\u003c\/strong\u003e, and \u003cstrong\u003e2024 Uniform Mechanical Code\u003c\/strong\u003e. This package includes those current code editions along with Texas licensing references and major HVAC study resources.\u003c\/p\u003e\n\n\u003cp\u003eA strong study approach includes learning how the books work together. A question about equipment installation may require the mechanical code, while a combustion or gas question may lead to the fuel-gas code. Load calculations and equipment selection may require Manual J or Manual S, while duct design questions may involve Manual D and a duct-sizing tool. Texas law questions require familiarity with the Occupations Code and Administrative Code.\u003c\/p\u003e\n\n\u003ch2 style=\"color: #d32f2f;\"\u003eExam Details\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eExam:\u003c\/strong\u003e Texas Environmental Air - Class A\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLicensing Agency:\u003c\/strong\u003e Texas Department of Licensing and Regulation\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTesting Provider:\u003c\/strong\u003e PSI\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eScored Questions:\u003c\/strong\u003e 120\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTime for Scored Questions:\u003c\/strong\u003e 230 minutes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNon-Scored Questions:\u003c\/strong\u003e 5\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAdditional Time for Non-Scored Questions:\u003c\/strong\u003e 10 minutes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePassing Score:\u003c\/strong\u003e 70%\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eExam Type:\u003c\/strong\u003e Open book\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLicense Class:\u003c\/strong\u003e Class A\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEndorsement:\u003c\/strong\u003e Environmental Air Conditioning\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eThe current examination content outline distributes the 120 scored questions across a wide range of HVAC subjects:\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAir Distribution:\u003c\/strong\u003e 18 questions\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBasic Refrigeration Components:\u003c\/strong\u003e 6 questions\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCombustion Air:\u003c\/strong\u003e 6 questions\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eControls:\u003c\/strong\u003e 6 questions\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEquipment Requirements and Design:\u003c\/strong\u003e 14 questions\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHVAC Systems:\u003c\/strong\u003e 11 questions\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePiping:\u003c\/strong\u003e 6 questions\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRefrigeration Principles:\u003c\/strong\u003e 6 questions\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSafety:\u003c\/strong\u003e 6 questions\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eService:\u003c\/strong\u003e 12 questions\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTesting:\u003c\/strong\u003e 12 questions\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTexas Laws and Rules:\u003c\/strong\u003e 6 questions\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVentilation:\u003c\/strong\u003e 6 questions\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVenting:\u003c\/strong\u003e 5 questions\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eAir Distribution is the largest single category, followed by Equipment Requirements and Design, Service, Testing, and HVAC Systems. Candidates should still prepare across the complete blueprint because the exam tests broad contractor-level competency rather than a single specialty topic.\u003c\/p\u003e\n\n\u003ch2 style=\"color: #d32f2f;\"\u003eOpen Book Test\u003c\/h2\u003e\n\n\u003cp\u003eThe Texas Environmental Air Class A Contractor examination is an \u003cstrong\u003eopen book test\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cp\u003ePSI allows candidates to bring approved references from the official examination reference list. Candidates are responsible for bringing their own materials to the examination center.\u003c\/p\u003e\n\n\u003cp\u003eApproved references may be highlighted, underlined, and contain notes made \u003cstrong\u003ebefore\u003c\/strong\u003e the examination session. Permanent index tabs are permitted. Temporary tabs, removable Post-it-style notes, homemade tabs, and loose additional paper are not permitted.\u003c\/p\u003e\n\n\u003cp\u003eCandidates may not write, highlight, underline, index, or otherwise mark their reference materials during the examination session. This makes preparation of the books before exam day especially important.\u003c\/p\u003e\n\n\u003cp\u003eOpen-book testing does not mean every answer can be found through a simple keyword search. Some questions evaluate practical HVAC concepts, calculations, diagnostic knowledge, and common industry principles. Candidates should combine technical understanding with fast reference navigation.\u003c\/p\u003e\n\n\u003cp\u003eFor code questions, candidates should use the code edition identified for the examination. Effective September 1, 2026, Texas references the \u003cstrong\u003e2024 International Mechanical Code\u003c\/strong\u003e, \u003cstrong\u003e2024 International Fuel Gas Code\u003c\/strong\u003e, and \u003cstrong\u003e2024 Uniform Mechanical Code\u003c\/strong\u003e for these examinations.\u003c\/p\u003e\n\n\u003ch2 style=\"color: #d32f2f;\"\u003eLicensing Steps\u003c\/h2\u003e\n\n\u003col\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMeet the minimum age requirement.\u003c\/strong\u003e Applicants for a Texas Air Conditioning and Refrigeration Contractor license must be at least 18 years old.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMeet an approved experience pathway.\u003c\/strong\u003e Applicants may qualify with at least 48 months of practical air-conditioning and refrigeration experience under the supervision of a licensed contractor during the preceding 72 months.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUse the certified-technician pathway when applicable.\u003c\/strong\u003e An applicant who has held a technician certification for the preceding 12 months may qualify with at least 36 months of practical experience under a licensed contractor during the preceding 48 months.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSelect the Class A license and Environmental Air endorsement.\u003c\/strong\u003e The license class and endorsement determine the examination and the type of work authorized.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSubmit the contractor application to TDLR.\u003c\/strong\u003e TDLR reviews the applicant's qualifications before examination eligibility is issued.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReceive examination eligibility.\u003c\/strong\u003e After TDLR approval, PSI provides instructions for registering and scheduling the examination.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrepare for the Environmental Air Class A examination.\u003c\/strong\u003e Study the approved references and examination content areas.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTake and pass the examination.\u003c\/strong\u003e The current passing score is 70%.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSubmit required insurance documentation.\u003c\/strong\u003e After passing the examination, complete the applicable TDLR insurance requirement.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eComplete the licensing process.\u003c\/strong\u003e Satisfy all remaining TDLR requirements before performing work under the contractor license.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2 style=\"color: #d32f2f;\"\u003eState Requirements\u003c\/h2\u003e\n\n\u003cp\u003eTexas Air Conditioning and Refrigeration Contractor licensing is regulated by TDLR under the Texas Occupations Code and Texas Administrative Code.\u003c\/p\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eClass A\u003c\/strong\u003e license permits work on equipment of any size within the license holder's authorized endorsement. This distinguishes Class A from Class B, which has equipment-capacity limitations.\u003c\/p\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eEnvironmental Air Conditioning\u003c\/strong\u003e endorsement covers air treatment for human comfort, including control of temperature, humidity, cleanliness, ventilation, and circulation.\u003c\/p\u003e\n\n\u003cp\u003eApplicants must establish qualifying practical experience before TDLR authorizes them to take the contractor examination. The standard experience pathway requires at least 48 months of practical experience under the supervision of a licensed air-conditioning and refrigeration contractor during the preceding 72 months.\u003c\/p\u003e\n\n\u003cp\u003eA separate pathway is available for applicants who have held a technician certification for the preceding 12 months and have accumulated at least 36 months of practical experience during the preceding 48 months.\u003c\/p\u003e\n\n\u003cp\u003eApplicants must complete the licensing requirements, including passing the appropriate examination, within the application eligibility period established by TDLR. After passing the examination, the applicant must satisfy the applicable insurance requirement before the contractor license is completed.\u003c\/p\u003e\n\n\u003ch2 style=\"color: #d32f2f;\"\u003eReference Books\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTexas Air Conditioning and Refrigeration Contractors License Law, Texas Occupations Code, Chapter 1302\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eCovers the statutory framework governing Texas air-conditioning and refrigeration contractor licensing, responsibilities, authority, and regulatory requirements.\u003c\/span\u003e\n\u003c\/li\u003e\n\n  \u003cli\u003e\n\u003cstrong\u003eTexas Air Conditioning and Refrigeration Contractors License Rules, Texas Administrative Code, Chapter 75\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eContains the administrative rules governing the Texas Air Conditioning and Refrigeration Contractors program, including licensing, responsibilities, applicable standards, and regulatory requirements.\u003c\/span\u003e\n\u003c\/li\u003e\n\n  \u003cli\u003e\n\u003cstrong\u003eOSHA 29 CFR 1904\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eAddresses recording and reporting occupational injuries and illnesses and supports preparation for contractor safety and compliance questions.\u003c\/span\u003e\n\u003c\/li\u003e\n\n  \u003cli\u003e\n\u003cstrong\u003eUniform Mechanical Code, 2024\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eA current mechanical-code reference covering HVAC systems, ventilation, ducts, combustion air, equipment installation, piping, and related mechanical requirements.\u003c\/span\u003e\n\u003c\/li\u003e\n\n  \u003cli\u003e\n\u003cstrong\u003eInternational Mechanical Code, 2024\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eCovers mechanical-system installation requirements, ventilation, exhaust, ducts, equipment, refrigeration, combustion air, and related HVAC code provisions.\u003c\/span\u003e\n\u003c\/li\u003e\n\n  \u003cli\u003e\n\u003cstrong\u003eInternational Fuel Gas Code, 2024\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eCovers fuel-gas piping, combustion air, appliance installation, venting, gas-system requirements, safety provisions, and related fuel-gas topics.\u003c\/span\u003e\n\u003c\/li\u003e\n\n  \u003cli\u003e\n\u003cstrong\u003eModern Refrigeration and Air Conditioning, 22nd Edition\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eA comprehensive HVAC technical reference covering refrigeration principles, components, electrical systems, controls, service, diagnostics, air conditioning, heating, and system operation.\u003c\/span\u003e\n\u003c\/li\u003e\n\n  \u003cli\u003e\n\u003cstrong\u003eDuctulator\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eA duct-sizing reference tool used to work with airflow, duct dimensions, velocity, friction rate, and other air-distribution calculations.\u003c\/span\u003e\n\u003c\/li\u003e\n\n  \u003cli\u003e\n\u003cstrong\u003eManual D, 2016, 3rd Edition\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eA residential duct-design reference covering duct-system design principles, airflow, friction, pressure, sizing, and distribution-system considerations.\u003c\/span\u003e\n\u003c\/li\u003e\n\n  \u003cli\u003e\n\u003cstrong\u003eManual J - Residential Load Calculations, Reprinted 2016, Eighth Full Edition\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eA residential heating and cooling load-calculation reference used to determine building loads and support proper HVAC system design.\u003c\/span\u003e\n\u003c\/li\u003e\n\n  \u003cli\u003e\n\u003cstrong\u003eManual S - Residential Equipment Selection\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eA residential equipment-selection reference used to match heating and cooling equipment to calculated loads and system-design requirements.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2 style=\"color: #d32f2f;\"\u003eExam Room Approved Books\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTexas Air Conditioning and Refrigeration Contractors License Law, Texas Occupations Code, Chapter 1302\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eListed on the Texas Business and Law reference list for the Air Conditioning and Refrigeration examinations.\u003c\/span\u003e\n\u003c\/li\u003e\n\n  \u003cli\u003e\n\u003cstrong\u003eTexas Air Conditioning and Refrigeration Contractors License Rules, Texas Administrative Code, Chapter 75\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eListed as an approved Texas Business and Law examination reference.\u003c\/span\u003e\n\u003c\/li\u003e\n\n  \u003cli\u003e\n\u003cstrong\u003eOSHA CFR 29 Part 1904\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eListed as the OSHA recording and reporting reference used for the contractor examinations.\u003c\/span\u003e\n\u003c\/li\u003e\n\n  \u003cli\u003e\n\u003cstrong\u003eUniform Mechanical Code, 2024\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eEffective September 1, 2026, the examinations reference the 2024 Uniform Mechanical Code.\u003c\/span\u003e\n\u003c\/li\u003e\n\n  \u003cli\u003e\n\u003cstrong\u003eInternational Mechanical Code, 2024\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eEffective September 1, 2026, the examinations reference the 2024 International Mechanical Code.\u003c\/span\u003e\n\u003c\/li\u003e\n\n  \u003cli\u003e\n\u003cstrong\u003eInternational Fuel Gas Code, 2024\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eEffective September 1, 2026, the examinations reference the 2024 International Fuel Gas Code.\u003c\/span\u003e\n\u003c\/li\u003e\n\n  \u003cli\u003e\n\u003cstrong\u003eModern Refrigeration and Air Conditioning, 22nd Edition\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eThe current technical reference list identifies the 22nd edition as an approved examination reference.\u003c\/span\u003e\n\u003c\/li\u003e\n\n  \u003cli\u003e\n\u003cstrong\u003eADI Duct Size Calculator\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eThe Air Distribution Institute duct-size calculator is listed as an approved technical reference.\u003c\/span\u003e\n\u003c\/li\u003e\n\n  \u003cli\u003e\n\u003cstrong\u003eManual D - Residential Duct Systems, 2014 Edition\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eListed specifically for the Environmental Air Class A and Class B examinations.\u003c\/span\u003e\n\u003c\/li\u003e\n\n  \u003cli\u003e\n\u003cstrong\u003eManual J - Residential Load Calculation, Eighth Edition, Version 2.50, 2016\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eListed specifically for the Environmental Air Class A and Class B examinations.\u003c\/span\u003e\n\u003c\/li\u003e\n\n  \u003cli\u003e\n\u003cstrong\u003eManual S - Residential Equipment Selection, 2014 Edition\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eListed specifically for the Environmental Air Class A and Class B examinations.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2 style=\"color: #d32f2f;\"\u003eTest Information and Study Materials\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eAir Distribution:\u003c\/strong\u003e With 18 questions, air distribution is the largest examination category. Study airflow, duct installation, duct sizing, filtration, return and supply grilles, and static pressure. Manual D and a duct-sizing calculator are particularly useful for this area.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eBasic Refrigeration Components:\u003c\/strong\u003e Review compressors, condensers, evaporators, metering devices, and refrigerants. Understand what each component does and how it affects refrigeration-system operation.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCombustion Air and Venting:\u003c\/strong\u003e Use the mechanical and fuel-gas codes to review combustion-air requirements, appliance venting, vent assemblies, and safe operation of fuel-burning equipment.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eControls:\u003c\/strong\u003e Review general HVAC controls, pressure and safety controls, temperature controls, and how control systems interact with heating, cooling, and refrigeration equipment.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eEquipment Requirements and Design:\u003c\/strong\u003e This 14-question category includes sensible and latent capacities, heat loads, HVAC codes, and voltage. Manual J and Manual S are important study resources for load calculations and equipment selection.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eHVAC Systems:\u003c\/strong\u003e Study equipment components, installation requirements, refrigeration systems, and the interaction between individual components in complete heating and cooling systems.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003ePiping:\u003c\/strong\u003e Review condensate systems, fittings, pipe sizing, pipe types, support, and valves. Know where code requirements differ depending on system type and installation conditions.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eRefrigeration Principles:\u003c\/strong\u003e Understand heat transfer, basic physics, and system pressures. Candidates should be comfortable applying refrigeration theory to practical service and diagnostic questions.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eService and Testing:\u003c\/strong\u003e These categories together account for 24 questions. Review electrical diagnosis, refrigerant recovery, superheat, subcooling, airflow measurement, combustion testing, electrical testing, and gas-system testing.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eTexas Laws and Rules:\u003c\/strong\u003e Review Chapter 1302 of the Texas Occupations Code and Chapter 75 of the Texas Administrative Code. Know the licensing structure, contractor responsibilities, and regulatory provisions relevant to air-conditioning and refrigeration work.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eReference Navigation:\u003c\/strong\u003e Practice deciding which book controls a question before searching. Code questions should lead to the appropriate 2024 mechanical or fuel-gas reference, while design calculations may require Manual J, Manual D, Manual S, or the duct-sizing tool.\u003c\/p\u003e\n\n\u003ch2 style=\"color: #d32f2f;\"\u003eHow 1 Exam Prep Helps You Reach Your Goal\u003c\/h2\u003e\n\n\u003cp\u003e1 Exam Prep helps Texas Environmental Air Class A candidates organize a large reference library into a practical study strategy. Rather than treating every book as equally important for every question, candidates can learn which reference is most useful for a particular subject and practice moving between technical manuals, codes, and Texas regulations efficiently.\u003c\/p\u003e\n\n\u003cp\u003eTrade-focused review can reinforce air distribution, refrigeration principles, combustion, equipment selection, controls, piping, service, testing, and ventilation. Practice-oriented preparation also helps candidates identify areas that may need more attention before exam day.\u003c\/p\u003e\n\n\u003cp\u003eReference-navigation practice is particularly valuable for this examination because the official book list is extensive. Knowing where information is located can reduce time spent searching during a 120-question open-book test.\u003c\/p\u003e\n\n\u003cp\u003e1 Exam Prep also helps candidates connect practical HVAC experience with contractor-level code and regulatory knowledge. A technician may already understand system operation but need additional review of Texas licensing law, load calculations, code requirements, or formal design procedures.\u003c\/p\u003e\n\n\u003cp\u003eThe goal is to build a structured preparation routine that combines HVAC technical review, open-book reference navigation, calculations, design principles, Texas laws and rules, and exam-focused practice without promising a particular examination or licensing outcome.\u003c\/p\u003e\n\n\u003ch2 style=\"color: #d32f2f;\"\u003eFrequently Asked Questions\u003c\/h2\u003e\n\n\u003ch2 style=\"color: #d32f2f;\"\u003eIs the Texas Environmental Air Class A exam open book?\u003c\/h2\u003e\n\n\u003cp\u003eYes. The current Texas Environmental Air Class A examination is an \u003cstrong\u003eopen book test\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003ch2 style=\"color: #d32f2f;\"\u003eHow many questions are on the exam?\u003c\/h2\u003e\n\n\u003cp\u003eThe examination contains \u003cstrong\u003e120 scored questions\u003c\/strong\u003e plus \u003cstrong\u003e5 non-scored questions\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003ch2 style=\"color: #d32f2f;\"\u003eHow much time is allowed?\u003c\/h2\u003e\n\n\u003cp\u003eThe scored examination allows \u003cstrong\u003e230 minutes\u003c\/strong\u003e, with an additional 10 minutes allocated for the non-scored items.\u003c\/p\u003e\n\n\u003ch2 style=\"color: #d32f2f;\"\u003eWhat score is required to pass?\u003c\/h2\u003e\n\n\u003cp\u003eThe current passing score is \u003cstrong\u003e70%\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003ch2 style=\"color: #d32f2f;\"\u003eWho administers the examination?\u003c\/h2\u003e\n\n\u003cp\u003eThe examination is administered by \u003cstrong\u003ePSI\u003c\/strong\u003e for the Texas Department of Licensing and Regulation.\u003c\/p\u003e\n\n\u003ch2 style=\"color: #d32f2f;\"\u003eWhat code editions apply beginning September 1, 2026?\u003c\/h2\u003e\n\n\u003cp\u003eThe examinations reference the \u003cstrong\u003e2024 International Mechanical Code\u003c\/strong\u003e, \u003cstrong\u003e2024 International Fuel Gas Code\u003c\/strong\u003e, and \u003cstrong\u003e2024 Uniform Mechanical Code\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003ch2 style=\"color: #d32f2f;\"\u003eWhat does a Texas Class A license allow?\u003c\/h2\u003e\n\n\u003cp\u003eA Class A Air Conditioning and Refrigeration Contractor license allows work on systems of any size within the license holder's authorized endorsement.\u003c\/p\u003e\n\n\u003ch2 style=\"color: #d32f2f;\"\u003eWhat does the Environmental Air Conditioning endorsement cover?\u003c\/h2\u003e\n\n\u003cp\u003eIt covers treating air to control temperature, humidity, cleanliness, ventilation, and circulation for human comfort.\u003c\/p\u003e\n\n\u003ch2 style=\"color: #d32f2f;\"\u003eWhich exam category has the most questions?\u003c\/h2\u003e\n\n\u003cp\u003eAir Distribution is the largest current category, with \u003cstrong\u003e18 questions\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003ch2 style=\"color: #d32f2f;\"\u003eCan approved books be highlighted and tabbed?\u003c\/h2\u003e\n\n\u003cp\u003eYes. Approved references may be highlighted, underlined, contain pre-exam notes, and use permanent index tabs. Temporary removable tabs are not permitted.\u003c\/p\u003e\n\n\u003ch2 style=\"color: #d32f2f;\"\u003eCan I write in the books during the examination?\u003c\/h2\u003e\n\n\u003cp\u003eNo. Candidates may not write, highlight, underline, index, or otherwise mark reference materials during the examination session.\u003c\/p\u003e\n\n\u003ch2 style=\"color: #d32f2f;\"\u003eWhy are Manual J, Manual D, and Manual S important?\u003c\/h2\u003e\n\n\u003cp\u003eThese references support preparation for load calculations, duct-system design, airflow, and residential equipment selection, all of which relate directly to Environmental Air examination topics.\u003c\/p\u003e\n\n\u003ch2 style=\"color: #d32f2f;\"\u003eWhat should I focus on during final preparation?\u003c\/h2\u003e\n\n\u003cp\u003eFocus on air distribution, equipment requirements and design, service, testing, HVAC systems, refrigeration principles, combustion air, controls, ventilation, venting, Texas laws and rules, and efficient navigation of the approved reference books.\u003c\/p\u003e\n\nCurrent exam format, open-book rules, and the September 1, 2026 transition to the 2024 mechanical and fuel-gas codes are supported by the current TDLR\/PSI candidate information. ([Texas Licensing and Regulation][1])\n","brand":"1 Exam Prep","offers":[{"title":"Default Title","offer_id":50514201739321,"sku":null,"price":1595.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1789\/0861\/files\/TX-ENVIRONMENTALAIRA-BOOKS.jpg?v=1790258697","url":"https:\/\/1examprep.com\/products\/texas-environmental-air-class-a-contractor-book-package","provider":"1 Exam Prep","version":"1.0","type":"link"}