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Our licensing specialists and team of instructors are available to help you.

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Many courses qualify for our No Pass, No Pay Guarantee.

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How We Can Help

Live Seminar

Obtain Your License

Our online exam prep is available 24/7. It is guaranteed to help you pass your exam.

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Renew Your License

Study from your home or office with an instructor presenting the information to you online.

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Online Training

Corporate Training

Fast, easy, and affordable. With online training, you can study at your pace and it's available 24/7.

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Home Study

Application Processing

We can assist with filing all required paperwork to start your business, obtain your license, or license renewal.

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Online Course Help

"I know I have completed a chapter in my course, but I'm not showing credit for it. What do I do?"
First, do not repeat the chapter.  Occasionally, a chapter may not show as completed on your screen.  The checkmarks are mainly a guideline for you to know if you completed it or not.  We have an additional tracking system to verify your progress on our end.  As long as you know that you completed the chapter, the checkmarks on your screen are not that important.

"I am trying to take a quiz online, but I receive the following message - 'Quiz loading aborted - data not found' - What do I do?
This error occurs if there is a communication timeout between your computer and our server.  Many times, the quiz will still load in the background.  If this is the case, you can simply drag the error box off to the side and proceed to taking the quiz.  You can also delete your temporary internet files or restart your computer in an attempt to help your connection speed.

Certificates of Completion

"I am needing to obtain a duplicate copy of my certificate of completion.  How can I obtain one?"
You can print additional copies of your certificate of completion by clicking the "gradebook" icon on your course screen.

 "My certificate of completion does not print correctly or part of the certificate is cut off when I print.  What is the best way to print a copy?"
The following steps are designed for a computer that operates on Windows XP or Windows Vista.
1. Go to the "gradebook" icon and click the link that says "get certificate".  Your certificate of completion will appear on the course screen.
2. Right click with your mouse on the image and click "Save Picture As". A new window will open. Click Save.  Please make a note of which folder you saved the certificate in.
3. From your desktop on your computer, locate the folder where you saved your certificate.
4. Right click on the icon for the picture and click open with, and choose "Windows Picture and Fax Viewer".  A new will will open displaying your certificate of completion.
5. From here, you can either right click on the image again and click print, or click the print icon at the bottom of the window.
6. After the photo printer wizard opens, click next.  The next screen might show you several other pictures.  Make sure that the certificate of completion has a checkmark in it's box and that no other pictures have a checkmark.  Click next again.
7. The next screen will allow you to select the printer that you wish to print from.  You can also click "printing preferences" if you would like to change your printer's default settings for grayscale or color modes.  Click next again.
8. On the next screen, underneath "available layouts", select "Full page fax print: centered and rotated to fit". Also ensure that your printer is powered on. Click next.
9. Your image will print.  Please review and make sure that the information is correct.

Thank you for your purchase! To access your online training, please check your email.  Your login information and link to the course(s) will be automatically sent to the email account that you registered with.  Please allow up to five minutes to receive the email. 


Contractors Resources

The links on this page are the leading resources for other services for contractors and home owners.  The links on the page right pertain to Realty, finding Subcontractors and other helpful information for the construction industry.

Please note that National Contractors Pre-Licensing Services, Inc. does not have any affiliation with the sites listed and does not assume responsibility for their content.

 Tennessee Real Estate - Crossville Tennessee real estate agency serving Cumberland County and surrounding areas in the Cumberland Plateau of Eastern Tennessee - residentials, country homes, farms, ranches, wooded acreage, hunting land, waterfront, retirement property and commercial businesses.



To work on stationary air conditioners and refrigeration systems, you must be certified under Section 608 of the Clean Air Act.  Please note that the purchase R-410a and R-134a do not require EPA certification as they do not have any ozone depleting substances. To get EPA certified, contact your local refrigerant supplier.

There are four types of EPA certification: Type I, Type II, TYPE III, and Universal Certification.

Type I Certification (Small Appliances) - This certification covers manufactured, charged, and hermetically sealed appliances with five pounds or less of refrigerant.

Type II Certification (High Pressure and Very High Pressure Appliances) - High Pressure appliances use refrigerant with a boiling point between -58°F and 50°F.  High Pressure refrigerants include 12, 22, 114, 500, and 502.  Very High Pressure appliances use refrigerant with a boiling point below -50°F.  Very High Pressure refrigerants include 13 and 503. 

Type III Certification (Low Pressure Appliances) - Low Pressure appliances use refrigerant with a boiling point above 50°F.  Some refrigerants included under this classification are 11, 113, and 123.

Universal Certification - An Universal Certification can be obtained and a candidate passes the certification exams for Type I, Type II, and Type III.

To become certified, technicians must pass a test demonstrating proper handling of ozone depleting refrigerants and knowledge of EPA refrigerant regulations.  

At this time, we do not have a seminar to prepare you for the EPA exam. We are developing an online class as well as a home study guide.  However, we do offer several training references to help prepare you for the EPA test. These references can be purchased individually or in a bundle. Online Bookstore - EPA Reference Books

  • Refresher Manual for Section 608
  • Refrigerant Transition and Recovery Certification Manual
  • Study Guide for EPA Section 608 Test
  • Understanding Section 608

To get EPA certified, contact your local refrigerant supplier.

Please select the state that you would like more information on obtaining license in.