Two refrigerants commonly used in current vehicle production are R1234yf and R134a.

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Multiple Choice

Two refrigerants commonly used in current vehicle production are R1234yf and R134a.

In modern vehicle air conditioning, two refrigerants you’ll commonly encounter are R1234yf and R134a. The reason this pair fits today is regulatory and practical: R134a has been the long-time standard, but it has a relatively high global warming potential. R1234yf was introduced as a lower-GWP replacement that can be used with similar system designs, so new vehicles often use it while older models still rely on R134a. That coexistence is why both show up in current production. The other refrigerants listed don’t fit automotive use as routinely. R12 and R22 are legacy substances phased out due to ozone depletion. R410A and R32 are popular in residential/commercial cooling and require different equipment and pressures than typical car systems. R404A and R600a are used mainly in commercial or domestic refrigeration. So the combination of R1234yf and R134a is the one you’re most likely to see in today’s vehicles.

In modern vehicle air conditioning, two refrigerants you’ll commonly encounter are R1234yf and R134a. The reason this pair fits today is regulatory and practical: R134a has been the long-time standard, but it has a relatively high global warming potential. R1234yf was introduced as a lower-GWP replacement that can be used with similar system designs, so new vehicles often use it while older models still rely on R134a. That coexistence is why both show up in current production.

The other refrigerants listed don’t fit automotive use as routinely. R12 and R22 are legacy substances phased out due to ozone depletion. R410A and R32 are popular in residential/commercial cooling and require different equipment and pressures than typical car systems. R404A and R600a are used mainly in commercial or domestic refrigeration. So the combination of R1234yf and R134a is the one you’re most likely to see in today’s vehicles.

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