Which refrigerants are commonly used in commercial air conditioning systems?

The choice that accurately represents the refrigerants commonly used in commercial air conditioning systems includes R-22, R-134A, R-410A, and R-404A.

R-22, once the standard refrigerant in residential and commercial applications, has been phased down due to its ozone-depleting properties, but it still may be encountered in existing systems. R-134A is primarily used in automotive applications and some commercial refrigeration, although its usage is also declining due to environmental regulations. R-410A has become a widely adopted refrigerant in modern air conditioning systems because it is chlorine-free and provides better efficiency compared to older refrigerants like R-22. R-404A is frequently utilized in low-temperature applications, such as refrigerators and freezers, making it a common choice in commercial refrigeration.

These refrigerants are recognized for their performance and efficiency in air conditioning systems, which is essential for meeting both consumer demands and regulatory requirements.

R-12 and R-32, mentioned in another option, are less favored today due to environmental concerns, much like the older R-12, which has been largely phased out. While R-290 and R-600A are natural refrigerants used in niche applications, they are not