{"product_id":"texas-environmental-air-class-b-contractor-book-package","title":"Texas Environmental Air Class B Contractor Book Package","description":"\u003ch1 style=\"color: #d32f2f;\"\u003eTexas Environmental Air Class B Contractor Book Package\u003c\/h1\u003e\n\n\u003cp\u003ePrepare for the Texas Environmental Air Class B Contractor examination with a comprehensive collection of Texas licensing references, current mechanical and fuel-gas codes, HVAC technical books, duct-sizing resources, load-calculation manuals, and equipment-selection materials. This book package is designed for contractors preparing for the \u003cstrong\u003eTexas Environmental Air Class B\u003c\/strong\u003e examination administered for the Texas Department of Licensing and Regulation.\u003c\/p\u003e\n\n\u003cp\u003eThe Texas Environmental Air Conditioning endorsement covers the treatment of air to control \u003cstrong\u003etemperature, humidity, cleanliness, ventilation, and circulation for human comfort\u003c\/strong\u003e. A Class B license allows a contractor to perform work within the Environmental Air endorsement on individual systems, products, or equipment of up to \u003cstrong\u003e25 tons of cooling capacity\u003c\/strong\u003e or \u003cstrong\u003e1.5 million Btu per hour of heating output\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cp\u003eThe Environmental Air Class B examination combines HVAC theory, installation requirements, system design, air distribution, refrigeration, controls, combustion air, piping, safety, service, testing, ventilation, venting, and Texas licensing requirements. Because the examination is open book, candidates also need to know how to move efficiently between mechanical codes, fuel-gas requirements, Texas laws and rules, technical HVAC references, and residential design manuals.\u003c\/p\u003e\n\n\u003cp\u003eBeginning September 1, 2026, Texas updated the adopted mechanical and fuel-gas codes to the \u003cstrong\u003e2024 editions\u003c\/strong\u003e. This package includes the 2024 Uniform Mechanical Code, 2024 International Mechanical Code, and 2024 International Fuel Gas Code, supporting preparation with the current code editions used for Texas Air Conditioning and Refrigeration requirements.\u003c\/p\u003e\n\n\u003cp\u003eThe package also includes resources for residential load calculations, duct-system design, and equipment selection. These references help candidates prepare for questions involving airflow, system capacity, duct sizing, sensible and latent loads, equipment selection, and other practical HVAC design concepts.\u003c\/p\u003e\n\n\u003ch2 style=\"color: #d32f2f;\"\u003eExam Details\u003c\/h2\u003e\n\n\u003cp\u003eThe Texas Environmental Air Class B examination is one of the contractor examinations offered for the Texas Air Conditioning and Refrigeration Contractors program. The examination is administered through \u003cstrong\u003ePSI\u003c\/strong\u003e for the \u003cstrong\u003eTexas Department of Licensing and Regulation\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eExam:\u003c\/strong\u003e Texas Environmental Air Class B\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 100\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTime for Scored Questions:\u003c\/strong\u003e 170 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 B\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 Environmental Air Class B examination covers a broad group of HVAC topics. Major technical areas include:\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAir Distribution:\u003c\/strong\u003e 15 questions\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBasic Refrigeration Components:\u003c\/strong\u003e 5 questions\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCombustion Air:\u003c\/strong\u003e 5 questions\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eControls:\u003c\/strong\u003e 5 questions\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEquipment Requirements and Design:\u003c\/strong\u003e 12 questions\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHVACR Systems:\u003c\/strong\u003e 9 questions\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePiping:\u003c\/strong\u003e 5 questions\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRefrigeration Principles:\u003c\/strong\u003e 5 questions\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSafety:\u003c\/strong\u003e 5 questions\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eService:\u003c\/strong\u003e 10 questions\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTesting:\u003c\/strong\u003e 10 questions\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eAir Distribution is the largest individual technical category, followed by Equipment Requirements and Design, Service, Testing, and HVACR Systems. Candidates should build a balanced study plan because the examination evaluates both system knowledge and practical contractor-level application.\u003c\/p\u003e\n\n\u003ch2 style=\"color: #d32f2f;\"\u003eOpen Book Test\u003c\/h2\u003e\n\n\u003cp\u003eThe Texas Environmental Air Class B Contractor examination is an \u003cstrong\u003eopen book test\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cp\u003eCandidates may bring approved references identified for the examination. Open-book testing makes advance organization important because candidates must locate information efficiently while working within the testing time limit.\u003c\/p\u003e\n\n\u003cp\u003eApproved reference books may generally be highlighted, underlined, and contain notes made before the examination. Permanent index tabs may be used when they meet testing-center requirements. Temporary tabs, removable notes, and loose additional papers are not permitted.\u003c\/p\u003e\n\n\u003cp\u003eCandidates are not permitted to add notes, highlighting, underlining, or indexing to their books during the examination session. Preparing and organizing approved references before test day can therefore be an important part of exam preparation.\u003c\/p\u003e\n\n\u003cp\u003eThe examination includes both reference-based and knowledge-based questions. Candidates should not expect every technical question to be solved by searching a code book. Refrigeration principles, troubleshooting, airflow, controls, equipment operation, testing procedures, and system design also require practical trade knowledge.\u003c\/p\u003e\n\n\u003cp\u003eFor current Texas code preparation, candidates should become familiar with 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;\"\u003eLicensing Steps\u003c\/h2\u003e\n\n\u003cp\u003eTexas Air Conditioning and Refrigeration Contractor licensing is administered through TDLR. The license class and endorsement selected by the applicant determine both the permitted work and the contractor examination.\u003c\/p\u003e\n\n\u003col\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMeet the age requirement.\u003c\/strong\u003e Applicants must be at least 18 years old.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMeet the applicable experience requirement.\u003c\/strong\u003e The standard experience pathway requires at least 48 months of practical air-conditioning and refrigeration experience under qualifying supervision during the preceding 72 months.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUse an alternate qualifying pathway when applicable.\u003c\/strong\u003e Texas provides additional experience pathways for applicants who meet specific technician-certification or other qualifying experience requirements.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSelect Class B Environmental Air Conditioning.\u003c\/strong\u003e The class establishes equipment-capacity limits, while the Environmental Air endorsement establishes the type of HVAC work authorized.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSubmit the contractor application to TDLR.\u003c\/strong\u003e TDLR reviews applicant eligibility before authorizing examination registration.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReceive examination eligibility.\u003c\/strong\u003e Approved applicants receive instructions for scheduling the required examination through PSI.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrepare with the current approved references.\u003c\/strong\u003e Study Texas law, contractor rules, HVAC codes, technical references, and design manuals applicable to Environmental Air Class B.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTake the Environmental Air Class B examination.\u003c\/strong\u003e Complete the scored and non-scored examination portions within the allotted testing time.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAchieve the required passing score.\u003c\/strong\u003e The current passing score is 70%.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eComplete remaining licensing requirements.\u003c\/strong\u003e Follow TDLR procedures, including applicable insurance and licensing documentation requirements, before the contractor license is issued.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2 style=\"color: #d32f2f;\"\u003eState Requirements\u003c\/h2\u003e\n\n\u003cp\u003eA Texas \u003cstrong\u003eClass B Environmental Air Conditioning\u003c\/strong\u003e license authorizes contracting work involving environmental air-conditioning systems within the Class B capacity limits.\u003c\/p\u003e\n\n\u003cp\u003eThe Class B license permits work on individual cooling systems with a capacity of \u003cstrong\u003e25 tons or less\u003c\/strong\u003e and individual heating systems with an output of \u003cstrong\u003e1.5 million Btu per hour or less\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cp\u003eEnvironmental Air Conditioning refers to treating air for human comfort by controlling temperature, humidity, cleanliness, ventilation, and circulation. This includes common residential and qualifying commercial heating and air-conditioning applications within the Class B capacity limits.\u003c\/p\u003e\n\n\u003cp\u003eA building or complex may contain multiple HVAC units whose combined capacity exceeds the Class B limits, provided each complete individual unit remains within the applicable Class B limitation.\u003c\/p\u003e\n\n\u003cp\u003eTexas requires applicants to satisfy practical-experience requirements before qualifying for a contractor license. The standard pathway requires at least \u003cstrong\u003e48 months of practical experience during the preceding 72 months\u003c\/strong\u003e under qualifying supervision.\u003c\/p\u003e\n\n\u003cp\u003eThe contractor examination is only one part of the licensing process. Candidates must also complete the applicable TDLR application, experience documentation, insurance, and licensing requirements.\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 for Texas air-conditioning and refrigeration contractor licensing, including license classes, endorsements, contractor responsibilities, enforcement, and regulatory authority.\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 and supports preparation for state law and licensing questions.\u003c\/span\u003e\n\u003c\/li\u003e\n\n  \u003cli\u003e\n\u003cstrong\u003eOSHA 29 CFR 1904\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eCovers federal requirements related to recording and reporting occupational injuries and illnesses and supports contractor safety and compliance study.\u003c\/span\u003e\n\u003c\/li\u003e\n\n  \u003cli\u003e\n\u003cstrong\u003eUniform Mechanical Code, 2024\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eCovers mechanical-system installation, ventilation, combustion air, duct systems, HVAC equipment, refrigeration, exhaust, 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\u003eProvides mechanical-code requirements covering heating, cooling, ventilation, duct systems, equipment installation, exhaust, refrigeration systems, and related HVAC work.\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 gas piping, combustion air, fuel-burning appliance installation, venting, gas-system testing, and fuel-gas safety requirements.\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 technical HVAC reference covering refrigeration principles, components, electrical controls, heating and cooling systems, service procedures, troubleshooting, and equipment operation.\u003c\/span\u003e\n\u003c\/li\u003e\n\n  \u003cli\u003e\n\u003cstrong\u003eDuctulator\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eA practical duct-sizing resource used to evaluate airflow, duct dimensions, velocity, friction rate, and other air-distribution relationships.\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-system design reference that supports study of airflow, static pressure, friction rate, duct sizing, fittings, and distribution-system design.\u003c\/span\u003e\n\u003c\/li\u003e\n\n  \u003cli\u003e\n\u003cstrong\u003eManual J - Residential Load Calcs, Reprinted 2016, Eighth Full Edition\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eA residential heating and cooling load-calculation reference used to evaluate building heat gain and heat loss for 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 performance to calculated building loads.\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\u003eAn approved Texas law reference for Air Conditioning and Refrigeration contractor examination preparation.\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\u003eAn approved rules reference covering Texas contractor licensing 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\u003eThe OSHA recordkeeping and reporting reference included in the contractor examination reference materials.\u003c\/span\u003e\n\u003c\/li\u003e\n\n  \u003cli\u003e\n\u003cstrong\u003eUniform Mechanical Code, 2024\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eThe 2024 edition is part of the updated Texas mechanical-code framework effective September 1, 2026.\u003c\/span\u003e\n\u003c\/li\u003e\n\n  \u003cli\u003e\n\u003cstrong\u003eInternational Mechanical Code, 2024\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eThe 2024 edition is part of the current Texas Air Conditioning and Refrigeration code framework.\u003c\/span\u003e\n\u003c\/li\u003e\n\n  \u003cli\u003e\n\u003cstrong\u003eInternational Fuel Gas Code, 2024\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eThe 2024 edition provides current fuel-gas provisions used for Texas HVAC contractor preparation.\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 technical examination reference covering HVAC fundamentals, refrigeration, service, controls, and system operation.\u003c\/span\u003e\n\u003c\/li\u003e\n\n  \u003cli\u003e\n\u003cstrong\u003eADI Duct Size Calculator\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eA duct-sizing calculator used for air-distribution calculations and airflow-related exam preparation.\u003c\/span\u003e\n\u003c\/li\u003e\n\n  \u003cli\u003e\n\u003cstrong\u003eManual D - Residential Duct Systems\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eThe approved examination reference list identifies the applicable Manual D edition for 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\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eUsed for residential heating and cooling load calculations and system-design questions.\u003c\/span\u003e\n\u003c\/li\u003e\n\n  \u003cli\u003e\n\u003cstrong\u003eManual S - Residential Equipment Selection\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eUsed for residential HVAC equipment-selection procedures and matching equipment performance to calculated loads.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eCandidates should use the exact editions identified in the current examination bulletin when selecting books for the exam room. The books included in this package should be used according to their intended study and testing purpose.\u003c\/p\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 Air Distribution is the largest current technical category with approximately 15 questions. Study airflow, duct sizing, friction loss, velocity, static pressure, registers, grilles, return-air systems, supply systems, and practical duct design.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eEquipment Requirements and Design:\u003c\/strong\u003e Approximately 12 questions involve equipment requirements and design. Review equipment capacity, load calculations, installation requirements, clearances, system selection, and proper application of residential design procedures.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eService:\u003c\/strong\u003e Approximately 10 questions address service-related knowledge. Candidates should understand common HVAC faults, system operation, refrigerant conditions, electrical troubleshooting, airflow problems, and service procedures.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eTesting:\u003c\/strong\u003e Approximately 10 questions involve system testing. Review electrical measurements, refrigerant pressures and temperatures, superheat, subcooling, airflow measurement, combustion testing, and gas-system testing principles.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eHVACR Systems:\u003c\/strong\u003e Approximately nine questions cover complete system operation and equipment interaction. Study heating systems, cooling systems, heat pumps, furnaces, air handlers, refrigeration circuits, and system components.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eBasic Refrigeration Components:\u003c\/strong\u003e Understand compressors, evaporators, condensers, metering devices, filter-driers, accumulators, receivers, and other common refrigeration components.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eRefrigeration Principles:\u003c\/strong\u003e Review pressure-temperature relationships, heat transfer, sensible heat, latent heat, refrigerant states, superheat, subcooling, and the basic refrigeration cycle.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eControls:\u003c\/strong\u003e Study thermostats, relays, contactors, pressure controls, safety controls, transformers, control voltage, and equipment sequencing.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCombustion Air:\u003c\/strong\u003e Review requirements for supplying combustion, ventilation, and dilution air to fuel-burning appliances and learn how enclosure conditions affect combustion-air requirements.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eFuel Gas and Venting:\u003c\/strong\u003e Use the International Fuel Gas Code and applicable mechanical-code provisions to review appliance venting, vent connectors, gas piping, shutoff valves, regulators, pressure testing, combustion air, and installation safety.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eManual J:\u003c\/strong\u003e Practice residential heating and cooling load calculations, including heat gain and heat loss considerations that influence system sizing.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eManual D:\u003c\/strong\u003e Review residential duct design, available static pressure, friction rate, equivalent length, airflow, fittings, and duct sizing.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eManual S:\u003c\/strong\u003e Study residential equipment-selection procedures and the relationship between calculated loads and manufacturer performance data.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eTexas Laws and Rules:\u003c\/strong\u003e Become familiar with Chapter 1302 of the Texas Occupations Code and Chapter 75 of the Texas Administrative Code, including license classes, endorsements, contractor responsibilities, and regulatory requirements.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eReference Navigation:\u003c\/strong\u003e The number of books makes organization especially important. Practice identifying the type of question first so you can move directly to the mechanical code, fuel-gas code, Texas law, technical textbook, or ACCA design manual most likely to contain the answer.\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 B candidates organize a broad group of HVAC references into a structured study process. Candidates can focus on high-value topics while learning how the individual books relate to different areas of the examination.\u003c\/p\u003e\n\n\u003cp\u003eTrade-focused review can reinforce air distribution, refrigeration principles, HVAC systems, combustion air, controls, piping, equipment requirements, service, testing, ventilation, and fuel-gas concepts.\u003c\/p\u003e\n\n\u003cp\u003eReference-navigation practice is especially valuable for an open-book examination with multiple code books and technical manuals. Candidates can practice determining whether a question belongs in the IMC, UMC, IFGC, Texas law and rules, Modern Refrigeration and Air Conditioning, Manual J, Manual D, or Manual S.\u003c\/p\u003e\n\n\u003cp\u003eThe design manuals add another important layer of preparation. Manual J supports residential load calculations, Manual D supports duct design, and Manual S supports equipment selection. Used together, they help candidates understand the relationship between building loads, equipment capacity, and air distribution.\u003c\/p\u003e\n\n\u003cp\u003e1 Exam Prep also helps candidates connect practical field experience with the formal code, design, and regulatory knowledge expected of a licensed contractor. Experienced HVAC professionals may already know how equipment behaves in the field but still benefit from structured review of Texas licensing requirements, code references, system calculations, and formal design procedures.\u003c\/p\u003e\n\n\u003cp\u003eThe goal is to support organized preparation through technical review, code navigation, practical calculations, contractor-law study, and familiarity with the approved reference materials. Preparation is designed to build confidence and exam readiness without guaranteeing a passing score 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 B exam open book?\u003c\/h2\u003e\n\n\u003cp\u003eYes. The Texas Environmental Air Class B 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 current examination contains \u003cstrong\u003e100 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 portion allows \u003cstrong\u003e170 minutes\u003c\/strong\u003e, with an additional 10 minutes for the non-scored questions.\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 through \u003cstrong\u003ePSI\u003c\/strong\u003e for the Texas Department of Licensing and Regulation.\u003c\/p\u003e\n\n\u003ch2 style=\"color: #d32f2f;\"\u003eWhat can a Texas Class B Environmental Air contractor work on?\u003c\/h2\u003e\n\n\u003cp\u003eA Class B Environmental Air contractor may work on qualifying individual cooling systems of \u003cstrong\u003e25 tons or less\u003c\/strong\u003e and heating systems of \u003cstrong\u003e1.5 million Btu per hour or less\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003ch2 style=\"color: #d32f2f;\"\u003eWhat does Environmental Air Conditioning mean?\u003c\/h2\u003e\n\n\u003cp\u003eEnvironmental Air Conditioning covers treatment of air to control temperature, humidity, cleanliness, ventilation, and circulation for human comfort.\u003c\/p\u003e\n\n\u003ch2 style=\"color: #d32f2f;\"\u003eWhat mechanical codes apply beginning September 1, 2026?\u003c\/h2\u003e\n\n\u003cp\u003eTexas updated its adopted references to include 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;\"\u003eWhich exam subject has the most questions?\u003c\/h2\u003e\n\n\u003cp\u003eAir Distribution is the largest current technical category, with approximately \u003cstrong\u003e15 questions\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003ch2 style=\"color: #d32f2f;\"\u003eWhy is Manual J important?\u003c\/h2\u003e\n\n\u003cp\u003eManual J supports residential heating and cooling load calculations and helps candidates understand how building loads affect HVAC system sizing.\u003c\/p\u003e\n\n\u003ch2 style=\"color: #d32f2f;\"\u003eWhy is Manual D important?\u003c\/h2\u003e\n\n\u003cp\u003eManual D addresses residential duct-system design, including airflow, static pressure, friction rate, duct sizing, and distribution-system performance.\u003c\/p\u003e\n\n\u003ch2 style=\"color: #d32f2f;\"\u003eWhy is Manual S important?\u003c\/h2\u003e\n\n\u003cp\u003eManual S addresses residential equipment selection and helps match equipment performance to the heating and cooling loads determined during system design.\u003c\/p\u003e\n\n\u003ch2 style=\"color: #d32f2f;\"\u003eCan approved books be highlighted and tabbed?\u003c\/h2\u003e\n\n\u003cp\u003eApproved references may be highlighted, underlined, contain notes made before the examination, and use permitted permanent indexing. Temporary removable tabs and loose additional papers are not allowed.\u003c\/p\u003e\n\n\u003ch2 style=\"color: #d32f2f;\"\u003eCan I write in my books during the exam?\u003c\/h2\u003e\n\n\u003cp\u003eNo. Candidates may not add writing, highlighting, underlining, or indexing to examination references during the testing session.\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, HVACR systems, refrigeration fundamentals, combustion air, controls, fuel-gas requirements, load calculations, duct design, equipment selection, and Texas licensing laws and rules.\u003c\/p\u003e\n\n","brand":"1 Exam Prep","offers":[{"title":"Default Title","offer_id":50514220843065,"sku":null,"price":1595.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1789\/0861\/files\/TX-ENVIRONMENTALAIRB-BOOKS-BOOKS.jpg?v=1790258978","url":"https:\/\/1examprep.com\/products\/texas-environmental-air-class-b-contractor-book-package","provider":"1 Exam Prep","version":"1.0","type":"link"}