HVAC Training Online

Career Diploma
Heating and Air Conditioning

Our HVAC training online program gives you the ideal start to a busy, in-demand career in HVAC. Our Heating and Air Conditioning course teaches you about HVAC components, diagnostics, installation and repair and prepares you for the EPA Section 608 Certification exam, proctored and delivered by our partner, the ESCO Institute.

  • Prerequisite: None
  • Study Method: Textbook with Online Exams
  • Program Length: As few as 6 Months

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  What You'll Learn

Our online HVAC training consists of 13 specialized lessons and once you graduate, you’ll be set up to take the EPA Section 608 certification exam. Successful completion of this exam will satisfy the federal government’s refrigerant handling qualifications applicable to residential and commercial air conditioner technicians.

Your lessons guide you from fundamental concepts to more challenging, hands-on skills. Practical review exercises help reinforce key topics, including how to...

  • Install and troubleshoot valves, compressors, water chillers, thermostats and heat pumps
  • Fix defective connections, controls and switches
  • Adjust refrigerant levels
  • Work with gas, oil and electric heat
  • Apply successful soldering and brazing techniques

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View HVAC Certification Course Curriculum Details  

Lesson 1: Learning at Ashworth  

The goals and values of Ashworth College; time management; creating a realistic weekly and monthly study schedule; the nature and purpose of assessments; how to study effectively to prepare for and take an online examination; developing the skill sets necessary for success in the twenty-first century.

Lesson 2: The HVAC/R Field  

Summary of HVACR technology and employment in HVACR environments; professional organizations, certifications and professional work practices; safe work practices.

Lesson 3: HVAC/R Tools, Testing Instruments and Service Equipment  

Review of common hand and power tools as applied to HVAC/R installation and servicing and an introduction to tools used exclusively by HVAC/R technicians, including electrical testing and HVAC/R servicing meters and gauges.

Lesson 4: Refrigeration Systems  

Overview of the standard components and assemblies that are used in the refrigeration process; identification of different types of refrigerants and the basic elements of the refrigeration cycle.

Lesson 5: Refrigerant Properties and Management  

Covers the safe and environmentally correct practices of handling refrigerants, and the correct techniques and procedures for soldering, brazing, and installing piping and tubing. Students will also learn about system charging, evacuation and leak testing.

Lesson 6: HVAC/R Electrical Systems  

Covers safe work practices related to electricity, basic concepts of electricity and AC current theory, identification and application of common components found in HVAC/R systems, interpretation of diagrams and schematics and descriptions of modern control and communication systems.

Lesson 7: Residential Air Conditioning Systems  

Required concepts of air-conditioning theory including airflow and filtering principles, ventilation and dehumidification; installation practices for common residential AC systems and ductwork; troubleshooting and maintenance practices.

Lesson 8: Residential Heating Systems  

Safety considerations for working with combustible materials; overview of basic furnace design and principles, installation, troubleshooting and maintenance for both gas and oil-fired systems.

Lesson 9: Heat Pump Systems  

Overview of electric heating systems including installation, troubleshooting and maintenance; detailed coverage of heat pump designs including air-source and geothermal units; troubleshooting concepts for heat pump systems.

Lesson 10: HVAC/R System Design, Sizing, and Layout  

Explanation of basic construction elements and configurations; integration of green building principles in modern construction; overview of air quality and load calculations; duct design, zone control and system testing and correction.

Lesson 11: Commercial Environmental Systems  

Applications of HVAC concepts to commercial applications including coverage of rooftop units, chilled water systems and hydronic and boiler-based heating systems; students also learn about cooling towers and commercial control systems.

Lesson 12: Commercial Refrigeration Systems  

Detailed discussion of systems used for commercial food preservation and storage, complex installations for supermarkets, and large commercial ice machines. Includes troubleshooting practices for common commercial refrigeration installations.

Lesson 13: HVAC/R Installation, Maintenance, and Troubleshooting  

Generally accepted practices for the proper installation, maintenance and troubleshooting of complex HVAC/R systems with detailed coverage of refrigeration system cleanup related to component failure.

Close Curriculum Details  

  What You Get

ESCO Institute EPA Certified

Begin our HVAC training online on your terms. Study at your own pace and get assistance when you need it. We’ve removed the obstacles so you can move ahead fast!

Air conditioning training courses at Ashworth College make the subject come alive. Your tuition covers:

  • Comprehensive HVAC lesson book and study guides
  • Online open-book exams
  • A 12-page EPA Section 608 study guide issued by the ESCO Institute ($12.95 value)
  • After you graduate: A $75 voucher covering all or some of the cost of writing the core section as well as sections 1,2 and 3 of the proctored EPA Section 608 Certification exam, delivered by the ESCO Institute at the location nearest you.
  • Participation in the Student Community
  • Career Services powered by CareerBuilder®

Graduates of our HVAC training online receive a personalized diploma and may attend our annual graduation ceremony. You’ll be ready to move forward in the HVAC profession, whether you want to start as an apprentice, work for a franchise or start your own business.

  • HVAC Training Online Books


  • HVAC Training Online Diploma


  • Graduation Video


We’ve cleared the way. Start your HVAC certification course today. Speak with an Admissions Advisor at 1-800-957-5412 or enroll online now.