ESCO Air Conditioning Practice Exam 2026 - Free AC Certification Practice Questions and Study Guide

R-410A is a refrigerant blend composed of two hydrochlorofluorocarbons (HFCs): HFC-32 and HFC-125. These compounds are selected for their favorable properties in air conditioning and refrigeration applications. HFC-32 contributes to lower global warming potential compared to older refrigerants, while HFC-125 helps to enhance the efficiency and overall performance of the refrigerant blend. This combination allows R-410A to operate efficiently at higher pressures, making it suitable for modern high-efficiency air conditioning systems.

In contrast, the other options listed, such as R-11, R-12, and R-22, are older refrigerants that have now been phased out or are in the process of being phased out due to their much higher ozone depletion potential and global warming potential. R-11 and R-12, specifically, are CFCs (chlorofluorocarbons), which are not used in new systems and are being gradually eliminated from existing systems as part of global efforts to protect the ozone layer. R-22 is an HCFC (hydrochlorofluorocarbon) that has also been recognized for its environmental impact and is being phased out in favor of more eco