Choose a state

C-21B Air Conditioning Contractor (2018-03-29)

The installation, repair, service and maintenance of equipment, devices, machinery, units and related ductwork which use evaporation, refrigeration, boilers or combustion for the control of air temperatures in structures, including, without limitation, any humidity and thermostatic controls in connection with any such equipment, devices, machinery, units or ductwork.

60 Questions
70% Minimum Passing Score
2 Hours

These products apply to test outline dated 2018-03-29

Click Here to View the Candidate Information Bulletin Click Here to View the Candidate Information Bulletin

Email this page to a friend

Your Name:
Friend's Email Address:

Add a message:




Open Book These books are allowed while taking your test.
Closed Book These books are for pre-test study only and are not available for use during the test.

  • Closed Book

    HVAC Duct Construction Standards, Metal and Flexible

    3rd Edition
    Publication Year: 2005

    $287.00

    The third edition of the HVAC Duct Construction Standards – Metal and Flexible is intended primarily for commercial and institutional duct construction. This American National Standard contains tables and details for constructing ductwork for ½" to 10" wg positive and negative pressures. This edition improves upon the second edition with expanded pressure class tables, separate tables for TDC/TDF construction and expanded tables for round duct construction including 6" wg positive and negative pressure and sizes up to 96". New in this edition is an engineering and design chapter to provide additional information to design professionals, double-wall construction details, new casing construction details and additional accessory items. The standard is applicable for construction using uncoated steel, galvanized and stainless steels and a limited range of aluminum ducts. This standard has been adopted in the ICC International Mechanical Code.

  • Closed Book

    ACCA Manual N: Load Calculation for Commercial Summer and Winter Air Conditioning

    5th Edition
    Publication Year: 2008

    $125.00

    ACCA's latest update of the Manual N light commercial method, Wrightsoft's Right-N is a simple, clear, logical, yet very sophisticated program to help you compute your calculations quickly and accurately.

  • Open Book

    Blank Quick Reference Tabs

    $10.16

  • Closed Book

    Evaporative Air Conditioning Handbook

    Publication Year: 1997
    3rd Edition

    $40.25

  • Open Book

    NFPA 54: National Fuel and Gas Code 2012 Edition

    Publication Year: 2012

    $71.00

    2012 NFPA 54: National Fuel Gas Code provides revised, industry accepted guidance for the safe installation and operation of gas piping systems, appliances, equipment, and accessories.

  • Closed Book

    Code of Federal Regulations, 29 CFR Part 1926 (OSHA) 2020

    Publication Year: 2020

    $26.78

    All Federal Construction Regulations (29 CFR 1926) are included in this “perfect bound” book in an easy-to-read, two-color layout.

    All 29 CFR 1926 regulations for construction industry are included along with the following items:

    29 CFR 1903 regulations covering inspections, citations, and penalties
    29 CFR 1904 regulations covering recording and reporting occupational injuries and illnesses
    OSHA keyword dictionary
    Easy to find OSHA interpretations

  • Open Book

    Uniform Mechanical Code 2012

    $115.00

    Uniform Mechanical Code 2012 provides complete requirements for the installation and maintenance of heating, ventilating, cooling and refrigeration systems, while at the same time allowing latitude for innovations and new technologies.

  • Closed Book

    Modern Refrigeration and Air Conditioning 21st Edition

    $140.00

    Modern Refrigeration and Air Conditioning is the HVACR standard for a new generation of learner. It correlates to HVAC Excellence and PAHRA accreditation requirements to ensure complete coverage that prepares students for career success. This edition has an improved instructional design, improved assessments, enhanced content on fundamentals, such as electrical theory and troubleshooting, and new digital assets that help students master knowledge, hands-on applications, and diagnostic skills. The revision also helps prepare students for employment and careers with new lab activities and features. Prepare your students for careers with new learning materials based upon the original HVACR industry standard.
    Follow-the-Heat™ Animations provide 63 short animations that introduce foundational concepts using simple, easily understood graphics and narrations.
    Troubleshooting Activities create an interactive experience designed to develop and promote troubleshooting techniques and logical diagnostic skills.
    New chapter on Electrical Troubleshooting, and expanded electrical coverage in the text and lab manual provide excellent coverage of essential information.
    Soft Skills for HVACR features emphasize the importance of workplace skills.
    Service Call Troubleshooting features present on-the-job service call situations.
    Full-color Lab Manual includes 35 new lab activities – including activities focusing on basic electrical skills and sheet metal construction.