Nevada Refrigeration and Air Conditioning (C21) Contractor License

The Refrigeration and Air Conditioning (C21) Contractor License allows you to do the following work:

  • Refrigeration (C21A):
    • Construction, erection and installation of:
      • Devices
      • Machinery
      • Units for the control of air temperatures below 50°F
      • Refrigerated rooms and insulated spaces
      • Insulation
      • Ducts
      • Blowers
      • Registers
      • Controls over humidity and thermostatic controls
      • Lines for supplying natural gas from the unit to the point of connection in the existing line for natural gas at the meter
      • Electrical service from the unit’s device to protect against excessive current to the main electrical panel (not the installation of other gas or electric services for the devices, machinery or units)
  • Air-Conditioning (C21B):
    • Service and maintenance of:
      • Devices
      • Machinery
      • Humidity and thermostatic controls in connection with any equipment
      • Units and related ductwork using evaporation, refrigeration, boilers or combustion for the control of air temperatures in structures
  • Sheet Metal (C21C):
    • Cornices
    • Flashings
    • Gutters
    • Leaders
    • Downspouts for rainwater
    • Pans
    • Food service equipment
    • Ducts
    • Louvres
    • Flues and metal roof systems (no fabrication or installation of equipment which uses refrigeration as an integral part of the system)
    • Patented chimneys
  • Maintenance (C21D):
    • Replacement and Repair of any parts existing unitos or systems of AC and Refrigeration
      • Compressors
      • Motors
      • Relays
      • Coils
      • Heat exchangers
      • Any other appurtenances and equipment (but not the replacement of complete condenser assemblies on remote systems, air handlers or any work that may alter the design of an existing system)
  • Solar Air-Conditioning (C21E):
    • Piping
    • Collectors
    • Storage and other equipment used in the conversion of solar energy to energy used for the control of air temperatures
  • Chilled and Hot Water Systems (C21F):
    • Boilers
    • Chillers
    • Coils
    • Pumps
    • Cooling towers
    • Piping
    • Storage tanks
    • Valves and other equipment used in the production and transfer of water for the control of temperatures
  • Industrial Piping (C21G):
    • Fabrication and removal of piping and equipment used for the transmission of:
      • Water
      • Steam
      • Chemicals
      • Gas
      • Food and other substances for industrial uses

How to Get a Nevada Refrigeration and Air Conditioning (C21) Contractor License

  1. Get a Nevada Business ID before completing the Contractor Application. Obtain the business ID by contacting the Nevada Secretary of State and filling out the application for a Nevada State Business License
  2. Collect and send the following required documentation by the Nevada State Contractors Board (NSCB) to submit the contractor application:
  3. Present proof of past work history by providing one of the types of documentation mentioned below:
    • Four Certification of Work Experience Forms (Certificates)
      • The minimum time of experience must be of 4 full years (1460 days) but each Certification of Work Experience Form doesn't have to demonstrate four years of experience
    • Proof of transferrable military training and experience
    • An active Master's Certification issued by an officially recognized agent or governmental agency similar to the Refrigeration and Air Conditioning (C21) classification
    • Proof of eligibility for Licensure by Endorsement. Applicants are recommended to review the State Equivalency Chart to determine their eligibility. To be considered for licensure by endorsement, you must submit a Request for Verification of License with your application, completed by your endorsing state
  4. Fill out and send the completed Contractor License Application Form with all documents
  5. Expect an Examination Eligibility form AFTER the application has been submitted and the work experience has been verified
  6. Take and Pass the following tests administered by PSI©:
  7. When NSCB has approved the license, the applicant must submit the License Bond indicated on the approval letter and proof of Workers' Compensation Insurance
  8. The NSCB will issue the license and send it by mail to the address of the application

Nevada Refrigeration and Air Conditioning (C21) Contractor License Exam Prep Course

Nevada Refrigeration and Air Conditioning (C21) Contractor License Exam

Below is all the information related to the Management Survey exam, including the official reference list.

Nevada Refrigeration and Air Conditioning (C21) Contractor Trade Exam

  • Testing Method: Computer Based
  • Testing Company: PSI©
  • Number of Questions: 85
  • Types of Questions: Multiple Choice
  • Time Allowed: 3 Hours
  • Minimum Passing Score: 60 Questions
  • Subjects Involved (No. of Questions):
    • Piping (6)
    • Insulation (1)
    • Hangers and Supports (3)
    • Sound, Vibration, and Seismic Control (1)
    • Heating and Cooling Principles (3)
    • Refrigerants and Refrigeration (7)
    • Load Calculations (6)
    • Testing, Adjusting, and Balancing (3)
    • Controls (5)
    • Machine Room (1)
    • A/C and Heat Pump Equipment (4)
    • Furnaces and Heaters (4)
    • Hydronics (2)
    • Chimneys, Flues, and Vents (5)
    • Combustion Air (2)
    • Fuel Systems (10)
    • Ducts (6)
    • Evaporative Cooling (2)
    • Chillers (3)
    • Solar (4)
    • Ventilation and Exhausts (3)
    • Safety (4)
  • PSI© Refrigeration and Air Conditioning (C21) Official Content Outline

Nevada Refrigeration and Air Conditioning (C21) Contractor Management Survey Exam

  • Testing Method: Computer Based
  • Testing Company: PSI©
  • Types of Questions: Multiple Choice
  • Number of Questions: 60
  • Time Allowed: 120 Minutes
  • Minimum Passing Score: 45 (75% correct)
  • Subjects Involved (No. of Questions):
    • Licensing (10)
    • Estimating and Bidding (7)
    • Lien Law (3)
    • Financial Management (12)
    • Tax Laws (5)
    • Labor Laws (5)
    • Project Management (3)
    • Contracts (6)
    • Risk Management (4)
    • Environmental and Safety (5)
  • PSI© Management Survey Official Content Outline

Nevada Refrigeration and Air Conditioning (C21) Contractor Book Set

This set of books includes all required references for the Refrigeration and Air Conditioning (C21) and Management Survey exams. Orders placed before 2 PM are shipped the same day via UPS and a tracking number is emailed before 3 PM.

  • NEVADA REFRIGERATION AND AIR CONDITIONING (C21) - BOOK SET WITHOUT TABS INCLUDES ALL BOOKS FOR TRADE AND BUSINESS EXAMS

    Sales price: $958.73
  • NEVADA REFRIGERATION AND AIR CONDITIONING (C21) - BOOK SET WITH TABS INCLUDES ALL BOOKS FOR TRADE AND BUSINESS EXAMS

    Sales price: $1,048.73

Nevada Refrigeration and Air Conditioning (C21) Contractor Exam Books

Books Allowed in Testing

Books Not Allowed in Testing

Nevada Refrigeration and Air Conditioning (C21) Management Survey Exam Book

Book Allowed in Testing