Free online courseIntroduction to market HVAC and Refrigeration

Course Description

Step into one of the most in-demand technical fields by learning how modern HVAC and refrigeration systems actually work. This free online course is designed to give you a clear, practical foundation in market refrigeration and air conditioning, focusing on the principles that power real equipment used in commercial environments. Whether you are exploring a new career path, adding professional skills to your resume, or simply want to understand cooling systems with confidence, you will gain concepts that transfer directly to the workplace.

You will learn the core idea behind refrigeration: moving heat from one place to another to create a cooler indoor space. The course breaks down the refrigeration cycle in plain language and helps you connect what happens inside the system to what you see in everyday installations. You will also explore rack refrigeration at a high level and understand why multi-system setups are common in commercial applications, along with the reasons technicians and facility teams rely on these configurations for capacity, control, and serviceability.

A major outcome of this course is being able to identify what key components do and why they matter. You will focus on the evaporator as the heat-absorbing side of the system and build a strong mental model of how heat is removed from air and products. By reinforcing these ideas through targeted questions, you will strengthen your ability to reason about troubleshooting scenarios, system behavior, and the vocabulary used in HVAC and refrigeration environments.

In addition, you will learn how economizer strategies take advantage of cooler outdoor air conditions, an essential concept for energy efficiency and operational cost control. By the end, you will be able to explain fundamental HVAC and refrigeration concepts clearly, making it easier to progress to deeper technical training or entry-level responsibilities in refrigeration and air conditioning.