Welcome to North American Technician Excellence, Inc. The leading non-profit certification program for technicians in the heating, ventilation, air-conditioning and refrigeration (HVAC/R) industry and the only test supported by the entire industry.


2111 Wilson Blvd. Suite 510Arlington, VA 22201Phone: 703-276-7247Toll Free Phone: 877-420-6283 (NATE)

How to Prepare

Prepare for Success

Achieving NATE certification is no small feat. Yet the rewards are great. That’s why we’ve created the following knowledge outlines to help you do the best you can on your exams – so that you do the best you can on the job.

Review KATEs

For training and testing information, first review NATE’s Knowledge Areas of Technician Expertise (KATEs). Each KATE contains a detailed list of references. The KATEs enable you to cross-reference information with the index of any HVACR reference book to locate the correct information to study. No question will be on a NATE test unless it is referenced in a KATE.

Attend a NATE-recognized class

You may find further assistance by attending a NATE-recognized training class. While not hosted by NATE, these classes meet the standards of our KATEs materials and may serve as good educational supplements.

Find a NATE-recognized class near you.