How to Inspect HVAC Systems Course

Welcome to InterNACHI's free, online How to Inspect HVAC Systems course. 


The goal of this course is to teach the student how to inspect the HVAC system, including the heating, cooling and fireplace. It includes a review of the components of common HVAC systems that may be present during a residential inspection, including warm-air, hydronic, steam and electric heating systems; air conditioning systems; and heat pump systems. 


Upon successful completion of this course, the student will be able to:
  • inspect the heating system and related components;
  • inspect the cooling system and related components;
  • inspect the fireplace, solid-fuel burning appliances and chimneys;
  • identify and describe each system and related component of the heating, cooling and fireplace systems;
  • describe to clients defects observed at the heating, cooling and fireplace systems.

Course includes:

  • 12 InterNACHI® CE credit hours;
  • 38,030 words;
  • 13 minutes of video;
  • inspection and writing assignment;
  • research and writing assignment; 
  • 121 quiz questions in 8 quizzes;
  • 75-question Final Exam (drawn from a larger pool);
  • instant grading; 
  • a downloadable, printable Certificate of Completion.

You will learn the following: 

  • Inspection Tools
  • Inspection Procedure
  • InterNACHI Standards of Practice
  • Introduction to HVAC
  • Heat Fundamentals
  • Identify and Describe Heating Systems
  • Gas, Gas Meters and Gas Pipes
  • Combustion Fundamentals
  • Furnace Fundamentals
  • Warm-Air Heating Systems
  • Ducts
  • Gas Furnaces
  • Oil Furnaces
  • High-Efficiency Heat Exchangers
  • Coal, Wood and Multi-Fuel Furnaces
  • Hydronic Heating Systems
  • Steam Heating Systems
  • Electric Heating Systems
  • Steam and Hot-Water Space Heating Systems
  • Air Conditioning
  • Heat Pumps
  • Air Cleaners and Filters
  • Humidifiers
  • Electric Furnaces

How to Inspect HVAC Systems Course 

Course # 3800



Estimated hours for the average student

Academic Engagement

Reading online course material at 140 words per minute


Watching and listening to instructional video


Taking quizzes


Taking the exam


Conducting a directed and independent inspection study performed according to the Standards of Practice, including the development of an inspection report 


Submitting an inspection and writing assignment


Submitting a research and writing assignment




Studying & reviewing instructional material in preparation for taking quizzes and exam


Reading the downloaded student course book including taking the quizzes with the book


Reading, research, and studying related to completing the research and writing assignment4.0
Studying and preparing for inspection processes according to a Standards of Practice, including capturing and storing digital images with a camera or device, making observations, evaluating conditions, deducing, formulating opinions, communicating observations in written form, attaining competency in performing inspections and using an inspection checklist or software and other inspection tools in producing a report.



Sub Total


Overall Total

  • 43.0 clock hours
  • 43.0 InterNACHI CE credit hours
  • 4.3 CEU
And, in keeping with InterNACHI's commitment to Continuing Education, this HVAC inspection course is open and free to all members, and can be taken again and again, without limit.
Reminder to members:  InterNACHI's Code of Ethics 1.10 requires that you comply with all government rules and licensing requirements of the jurisdiction where you conduct business.  InterNACHI's courses and Standards generally exceed the Standards of Practice that you are required to abide by locally.  
This course has been approved by:

Upon completion of this course and passing of the 75-question final exam (drawn from a larger pool), the student can download and print their own Certificate of Completion which is auto-generated in their own name. 

The student's (InterNACHI member's) information is recorded on InterNACHI's servers for membership compliance verification, and automatically logs completion into InterNACHI's online Continuing Education log. 
Non-members may view only the first page of the course.
Members will need their username and password.  If you have forgotten your password, CLICK HERE (instant response) or email and request it (don't forget your name). 
InterNACHI... #1 in inspection education.

InterNACHI® Members:


Not a member yet?

Join today for access to this and thousands of other InterNACHI® membership benefits.
Some features which make InterNACHI's courses superior to existing continuing education options:
  • The course is free for all InterNACHI members.
  • The course is written in pure XHTML code for quick loading.  The course loads fine on old computers and loads fast, even with dial-up.
  • The course is designed using a hierarchal menu coupled with a sequential page navigation.  This provides the student with the option to easily repeat areas of weakness.
  • The course permits the student to start, stop and restart any part of the course as often as desired.
  • There are a variety of images within the course, including diagrams, illustrations and photos. 
  • The illustrations can be enlarged for clearer viewing by clicking on them.
  • The text is integrated into InterNACHI's Inspector Glossary.  Rolling over blue-colored terms provides their definition.
  • The final exam uses multiple-choice questions that reference the images. 
  • The course's quizzes and final exam have numerous advantages over traditional exam systems:
    1. The course, quizzes and final exam incorporate built-in intelligence which identifies and strengthens each student's unique subject weaknesses.
    2. Not only is each question weighted with regard to score, but each answer is weighted, as well as the correctness of each answer being weighted.
      1. Answers to easy questions are weighted such that the student is penalized, in terms of score, for answering incorrectly, but rewarded modestly for answering correctly.
      2. Answers to difficult questions are weighted such that the student is rewarded, in terms of score, for answering correctly, but not penalized for answering incorrectly.
      3. Answers to questions regarding basic safety, or questions every inspector should know the answer to, are weighted such that the student is severely penalized, in terms of score, for answering incorrectly.
  • Upon passing the final exam, the student can print out a Certificate of Completion which is auto-generated in their own name.
The student's (InterNACHI member's) information is recorded on InterNACHI's servers for membership compliance verification, and automatically logs completion into InterNACHI's online Continuing Education log.


InterNACHI® Members:


Not a member yet?

Join today for access to this and thousands of other InterNACHI® membership benefits.