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Obtain Your License

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

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

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

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Application Processing

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

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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.

Section 608 Study Materials

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.  

Other Courses You May Be Interested In

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.

To view our Section 608 reference materials click here.

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


Homestudy Guides/Tutorials

Tutorial Terms and Conditions

Tutorials are intended to give students an opportunity to work on a one-to-one basis with a committed faculty instructor who guides the student through course material. Tutorial courses expose the student to the same textbooks and instructional materials as conventional courses; the tutorial assignments differ from conventional course assignments in that tutorials are designed specifically for individuals rather than for groups. Please review the following course guidelines before you begin the lessons. These guidelines are designed to provide you with specific direction as you proceed.


Tutorial syllabi, outlines, lessons and course-specific forms and information can be accessed through http://www.contractor-licensing.com/. Required books may be ordered through National Contractors Bookstore

All Rights Reserved. Copying (publishing, faxing, using the Authors words and so forth) is NOT permitted without the expressed written permission from the Author.

These Guidelines apply to each twelve-week tutorial only.

Effective for any twelve-week tutorial taken on or after 1 August 2004.

1. When you make telephone contact with your instructor, be prepared to make a brief oral presentation. You should allow adequate time for the instructor to have received his copy of your work. Also, be certain that you have retained a copy of your work and have it readily available for review and discussion.

2. If you need additional assistance or additional information/clarification, do not hesitate to contact your instructor more frequently than is required in the lessons.

3. You must schedule your telephone (or other) conferences through the faculty secretaries. To schedule an appointment, you may call 1-865-777-1748 or send a message. The instructor is available for conferences during his office hours.

4. For written submissions, be sure to state the question in written form prior to working each response. Be certain to make a copy of all work forwarded to the instructor. Remember to forward a copy of all completed learning activities to the instructor at regular intervals. Students are encouraged to submit work via E-mail. Files attached or E-mail messages should be saved in Rich Text Format (“rtf”). If the file is not in Rich Text Format you should indicate in your accompanying message what the format of the file is. When sending work via facsimile services, be certain to include your name and the instructor’s name on all pages.

5. It is required that work is typed, double-spaced and written in appropriate formal style. This means all work should be free from spelling and grammatical errors and representative of quality work.

6. Try to integrate professional as well as personal experiences in all of your responses.

7. Remember that you have up to 12 weeks to complete each a tutorial. Develop an individual time line for your course of study.


8. Feel free to discuss the tutorial with family or friends. However, all work must be your own work. Do not plagiarize your text or any other source.

9. Additional reading on the subject is encouraged.

10. Please do not forget to complete and return the Course Evaluation Form.

11. All appointments will be scheduled on Eastern Time. Please know your time zone and schedule your appointments accordingly.

12. It is the responsibility of the student to manage his or her scheduled appointments and call promptly. Students who habitually miss appointments will not be given future appointments without express permission from the instructor.