The following references are recommended for the Oklahoma Unlimited HVACR Contractor and Journeyman examinations. These references are permitted to be used during testing. Please note that the ACCA Ductulator and Manual N are used ONLY on the contractor exam. Also, to become a licensed contractor, you will also need to pass the Mechanical Business and Law exam.
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29 CFR OSHA 1926 Construction Industry Regulations & Standards, July 2026 Edition
$76.99View ProductMake compliance with dense government safety regulations simple with the 29 CFR 1926 OSHA Construction Industry Regulations. Updated through July 2026, the book provides you with a comprehensive set of the most up-to-date Construction regulations.
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Modern Refrigeration and Air Conditioning, 22nd Edition
$236.99View ProductThe Modern Refrigeration and Air Conditioning, 22nd Edition is the HVACR standard for a new generation of learners. It correlates to HVAC Excellence and PAHRA accreditation requirements to ensure complete coverage that prepares students for career success.
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ACCA Ductulator – Duct Calculation Slide Rule
$65.99View ProductOne of our most popular catalog items! This durable two-sided plastic sizing wheel comes with a complete instruction manual for residential and commercial duct-sizing procedures. Designed by Hank Rutkowski.
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Manual J Residential Load Calculation (8th Edition Version 2.50)
$174.99View ProductManual J 8th Edition Version 2.50 is the national ANSI-recognized standard for producing HVAC equipment sizing loads for single-family detached homes, small multi-unit structures, condominiums, town houses, and manufactured homes. A proper load calculation, performed in accordance with the Manual J 8th Edition procedure, is required by national building codes and most state and local jurisdictions.
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Manual N – Commercial Load Calculation for Small Commercial Buildings, 5th Edition
$142.99View ProductThe Manual N – Commercial Load Calculation for Small Commercial Buildings, 5th Edition, from the Air Conditioning Contractors of America (ACCA), details the correct HVAC load calculation procedure for small and midsize commercial buildings. This new edition addresses advances in the commercial construction industry, such as new materials, methods of assembly, and operational requirements. It provides instruction to help contractors and designers satisfy new (and often conflicting) energy, ventilation, and comfort requirements. Manual N is divided into four sections providing both a quick procedure, and a more comprehensive procedure, based on the requirements of your application.
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Mathematics for Plumbers and Pipefitters 8th Edition
$283.99View ProductNow in its 8th edition, Mathematics for Plumbers and Pipefitters delivers the essential math skills necessary in the plumbing and pipefitting professions.
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Redi-Tag Permanent Tabs – 375 Blank Tabs
$44.99View ProductRedi-Tag permanent tabs are self-sticking and you can print on your laser printer in minutes or write directly on them. Made of heavy duty, durable plastic that won’t tear of curl. Input and format text using Windows® versions of Microsoft® Word and WordPerfect®. Actual size of tab 1-1/8″ x 1-1/4″. 100 tabs per pack.
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2024 International Fuel Gas Code (International Code Council Series)
$131.99View ProductThe 2024 International Fuel Gas Code (IFGC) provides comprehensive regulations for the design, installation, and inspection of fuel gas systems and gas-fired appliances in buildings. It aims to ensure safety, efficiency, and compliance with modern standards in fuel gas applications.
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2024 International Mechanical Code (International Code Council Series)
$131.99View ProductThe 2024 International Mechanical Code (IMC) sets modern, standardized regulations for the design, installation, and maintenance of mechanical systems in residential and commercial buildings. Published by the International Code Council (ICC), it covers HVAC systems, ventilation, refrigeration, combustion air, ductwork, and equipment safety. The 2024 edition includes updates for new refrigerants, indoor air quality, leak detection, and emerging technologies, ensuring safer and more energy-efficient mechanical systems aligned with current industry practices.
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Oklahoma HVACR (Limited) Exam – Complete Tab Pack
$79.99View ProductPERMANENT TABS PACKAGE – This package includes state approved permanent tabs for all references allowed to be used during the exam.
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Oklahoma HVACR (Limited) Online Exam Prep Complete Package
$1,479.91View ProductThe Oklahoma HVACR Exam Prep complete package includes all reference included in the exam, pre-printed tabs to for quick reference and Exam Prep to help you study and come familiar with the materials. The course includes narrated highlighting guides, practice tests, theory, calculations, instructor support and test-taking tips and strategies. The highlighting guides and quizzes are designed to familiarize students with testing materials. We do not provide students with exact test questions, as the state does not release this information.
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Oklahoma HVAC Tab Pack
$63.99View ProductPERMANENT TABS PACKAGE – This package includes permanent tabs for some references allowed to be used during the exam.
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Oklahoma HVACR (Unlimited) Exam – Complete Tab Pack
$79.99View ProductPERMANENT TABS PACKAGE – This package includes state approved permanent tabs for all references allowed to be used during the exam.
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Oklahoma HVACR (Unlimited) Online Exam Prep Complete Package
$1,447.91View ProductThe Oklahoma HVACR Exam Prep complete package includes all reference included in the exam, pre-printed tabs to for quick reference and Exam Prep to help you study and come familiar with the materials. The course includes narrated highlighting guides, practice tests, theory, calculations, instructor support and test-taking tips and strategies. The highlighting guides and quizzes are designed to familiarize students with testing materials. We do not provide students with exact test questions, as the state does not release this information.
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Oklahoma Limited Residential Journeyman (Mechanical) Online Exam Prep Course Only
$296.99View ProductThe Oklahoma Limited Residential Journeyman (Mechanical) Online Exam Prep course includes narrated highlighting guides, practice tests, theory, calculations, instructor support and test-taking tips and strategies. Topics include Duct Systems, Vents, Insulation, Combustion Air, Piping and more. The highlighting guides and quizzes are designed to familiarize students with testing materials. We do not provide students with exact test questions, as the state does not release this information.
