Which refrigerant is most commonly used in split air conditioning systems?

The most commonly used refrigerant in split air conditioning systems is HFC-410A. This refrigerant has become the preferred choice due to its efficient thermodynamic properties and compatibility with modern air conditioning systems. HFC-410A is a blend of two hydrofluorocarbons, which allows it to operate at higher pressures compared to older refrigerants.

Its use has surged since it does not deplete the ozone layer, making it an environmentally friendlier option compared to refrigerants like R22, which is being phased out due to its ozone-depleting potential. HFC-410A is particularly effective in residential and commercial cooling applications, providing better energy efficiency and performance.

Using HFC-410A aligns with regulatory frameworks aimed at reducing the environmental impact of refrigerants and promoting the use of substances that comply with modern environmental standards. Thus, its prevalent use in split air conditioning systems is largely a result of its efficiency, environmental compliance, and effectiveness in providing cooling.