R-454B

In a nutshell, refrigerant is a fluid that runs through the refrigerant lines of your HVAC system to cool warm air. The refrigerant changes from liquid to gas during this process. The refrigerant gas is then condensed to a liquid to start the cycle again.

Refrigerants have traditionally contained hydrochlorofluorocarbons (HCFCs) or hydrofluorocarbons (HFCs), which are potent greenhouse gases. As scientific research has shed light on the damage HCFCs can do to our ozone layer, stricter environmental regulations mean older refrigerants such as R-22 (also known as Freon or HCFC-22) were phased out and replaced by HFC R-410A. HFCs are now being phased down under the American Innovation and Manufacturing (AIM) Act of 2020 because they have higher global warming potential (GWP) levels.