The most commonly used gas in air conditioning systems is a refrigerant called R-410A, also known as Puron. R-410A is an environmentally friendly refrigerant that replaced the previously used R-22 (Freon) due to its ozone-depleting properties.
R-410A is a hydrofluorocarbon (HFC) refrigerant that does not contain chlorine, which makes it more environmentally friendly. It has become the standard refrigerant for residential and commercial air conditioning systems in many countries.
Other refrigerants used in air conditioning systems include R-134a, which is commonly used in automotive air conditioning, and R-407C, which is used in some older air conditioning units. However, R-410A has become the preferred refrigerant for new installations and is widely used in modern air conditioning systems.