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Air Conditioning and
Refrigeration Technician
Online Training

Focused Air Conditioning and Refrigeration Training Online

Our courses and programs offer the quickest and most convenient manner of HVAC and Refrigeration training available to the busy adult.

Career advice, training, and continued support throughout your career driven from professional HVAC and Refrigeration Educators. 
When you succeed, we succeed.


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Do You Need NATE CE Hours?

Each of our courses is recognized for NATE CE Hours. Check out our comprehensive information.

Find Out More About ALL of the Courses That We Offer

Annual Subscription to Everything HVAC

Subscribe to our comprehensive catalog of over 50 extensive courses covering the most basic fundamentals through Chillers and Boiler.


Examples of Our Courses

HVACRedu maintains the most extensive selection of online courses relating to the air conditioning, refrigeration, and building automation industries. Developed by a team of subject matter experts (SME) and Certified Master HVAC Educators (CMHE) the courses and programs are considered to be the basis for all other competitors.

Find out about the HVACREDU difference and how we can make a difference in your chosen career pathways.

Certified Air Conditioning Technician Training

Sample Video Lesson: Chris Compton provides a lecture on the basics of the direct expansion refrigeration cycle. Each of our courses is rich with photos and videos that help intensify the learning process.

Sample Lesson: This program is one of our most popular. One of the major highpoints of the program is a focus on controls and sequences of operation.

The new Technician entering the trades needs the core skills to succeed. This accredited training track, called the NATE Certified HVAC Technician Program ensures that the new technician succeeds with a combination of videos, video lectures and more.

The academic program is taught by an experienced team of Certified Master HVAC Educators.

The NATE Certified HVAC Technician Program (NCT) is a comprehensive online HVAC education program encompassing a well-rounded set of skills used by installers and technicians who are seeking NATE Certification.

It starts with cultivating new technicians into the Ready to Work program with all the essential skills needed to start a career in HVAC. Then, it covers all the NATE Core areas with a rich selection of foundational courses, and then focuses on Air Conditioning Specialty at the Service Level. The content presented in each course targets learning objectives that have been identified by HVAC industry groups (HVAC Excellence, AHRI, NATE, HARDI, PAHRA, and ACCA) as critical knowledge areas for an HVAC technician.

North American Technician Excellence (NATE) is the nation’s largest and most recognized non-profit certification organization for heating, ventilation, air conditioning and refrigeration technicians. NATE certification tests represent real-world working knowledge of HVACR systems. Developed by a committee of industry experts nationwide, all the NATE tests are rigorous, knowledge-based, multiple-choice tests designed to validate a technician’s knowledge.

You can read more about NATE at:’s NCT Program is specifically structured to teach foundational skills to individuals who are new-to-the-industry and non-certified installers and technicians who want formal education to upskill their knowledge and prepare for licensing or certification exams.

Commercial Refrigeration for the HVAC Technician

Commercial Refrigeration for the HVAC Technician

Experienced HVAC technicians spend time wondering how that walk-in freezer or ice machine works. This in-depth program is specifically intended for experienced HVAC technicians. Taught by Dick Wirz, this program answers most of the burning questions asked by field technicians.

With a combination of videos and the textbook written by Dick Wirz, the HVAC technician finishes the course complete with new knowledge that can be put to use immediately. The entire team of Certified Master Educators is available for questions related to the training.

We will compare things you’re already familiar with like space temperatures and common components of basic AC systems to those of commercial refrigeration systems. We will examine evaporators, condensers, compressors, metering devices, controls and accessories, and the refrigerants commonly used in commercial refrigeration. We will review the important terminology. At the end of this course we will cover some system troubleshooting, giving you a chance to put your knowledge to work on the 9 most common system problems.

We will compare things you’re already familiar with like basic AC systems to those of commercial refrigeration systems. We will examine compressor motor controls, retrofitting, recovery, evacuation, and charging; various supermarket refrigeration systems, walk-in refrigerators and freezers, and commercial ice machines so you can identify the components, their functions, and the refrigerants belonging with each application. After you have a good understanding of the equipment, we’ll explore appropriate temperatures for products kept in that equipment. And finally, you will understand when to apply TROT (The Rule Of Thumb) in the absence of a manufacturer’s recommendation.

Building Automation Direct Digital Controls (DDC)

Direct Digital Control Systems

Sample Lesson: Ron Auvil presents a comprehensive program of content rich building automation lectures, labs and content. This program is best for experienced technicians with expert understanding of electrical theory.

The HVAC Controls / Building Automation Systems Program is an advanced program totaling 87 instructional hours, videos included. Students will take one course at a time in a systematic progression through courses that lay a good foundation, then move into commercial HVAC systems and through the specific technologies of controls systems.

Students are enrolled as online asynchronous independent study. This access allows students to login at their convenience 24/7/365. The courses were written by Ron Auvil who is the Author of HVAC Control Systems, American Technical Publishers.

Along with the courses described below, Ron also teaches these topics in a series of recorded video lecture presentations included with each learning module. This program is NATE recognized for 90 hours of continuing education (CEHs) which are applicable to NATE re-certification.

The courses making up the Program are

1. 153 HVAC Control Systems Fundamentals

2. 154 HVAC Control Systems Types and BAS Basics

3. 155 HVAC BAS Installation and Strategies

4. 156 HVAC BAS System Management and Advanced Technologies

5. 157 HVAC Troubleshooting DDC Systems & Components


This program is designed for HVAC technicians, facilities managers, and commercial maintenance technicians who have already completed an educational program for HVAC and/or have current industry work experience in the field. The program will build on your existing knowledge of HVAC fundamentals and equipment and help you learn HVAC Controls and Building Automation Systems.

Master Catalog of All HVAC/R Courses

This program started 23 years ago. Over the years, we have grown from the first-ever NATE recognized courses to a comprehensive online “Virtual Tech School Program” with 1600+ Hours of HVACR specific curriculum.

If you like review, check ours out HERE

In this catalog, you will find an entire range of courses, programs, and exam preps focused on HVACR technology - training explicitly designed to elevate the knowledge base and understanding of the technician in the field or someone that wants to get started in this vast and challenging career. The scope of the HVACR industry is enormous with many specialized career paths to follow. Before you follow a specific route, it is essential that you first set a solid foundation base of knowledge!

Once laid, the foundation ensures that there is no limit to where your career will lead you. With our extensive program, we can take you from zero up into many specialized advanced career tracks. We are HVACR Technician advocates with our total focus on helping that person succeed in their career!

As you take our training, you will find we explain the details in a way that works for you. If you need additional information or guidance, we have a world-class faculty ready to help. Online has many advantages: on your schedule, no travel, open for you 24/7/365, available anywhere you can connect, able to review multiple times until you get it, not once and done. We exercise your understanding and then assess our learners to make sure they got it.

We provide our program to a wide range of clients, from individuals to National & Global organizations. Over the years, we have received National awards and have been accredited by several 3rd party accrediting bodies. Our real accomplishment is the thousands of learners that have come through our portals and have started in a new career or climbed higher in their current job. The entire team of registration, student support, and faculty are here to make your experience worthwhile and rewarding as you move up the ladder.