We have provided a list of reputable sources If you need more help or information about going green with an energy efficent HVAC system... What is Freon and Why is It Important? The AC system in your home is one of the most misunderstood appliances that homeowners have trouble diagnosing. While many people are used to hearing that an AC system may need more freon, many do not understand exactly what freon is and what it does. Our Chicago HVAC company Four Seasons Heating and Air Conditioning can help you better understand how freon works and how you can keep your AC running at maximum efficiency. Today, we are going to look at what freon is, and how it works to keep your home cool and comfortable. What Is Freon? Freon is a non-combustible gas that is used as a refrigerant in air conditioning applications. This freon undergoes an evaporation process over and over again to help produce cool air that can be circulated throughout your AC system. freon is available in a couple of different..