In shortR1234yf is a very low-GWP HFO that has replaced R134a in new car air conditioning. It is also a component of many new blends such as R454B, R513A and R448A.
R1234yf properties
| Code | R1234yf |
|---|---|
| Chemical name / composition | 2,3,3,3-Tetrafluoropropene |
| Family | HFO |
| GWP (AR4, 100 years) | 4 |
| ODP | 0 |
| Safety class (ISO 817 / ASHRAE 34) | A2L: lower toxicity, mildly flammable |
| Boiling point (1 atm) | −29.5 °C |
| Temperature glide | None (pure fluid) |
| Charge equal to 5 t CO₂e | — |
| Status | Next generation |
Where is R1234yf used?
- New car air conditioning
- Some chillers and heat pumps
- Component of new blends
Service and safety notes
- Mildly flammable (A2L). Work away from ignition sources, use A2L-rated vacuum pumps, recovery units and leak detectors, and respect charge limits for the room size (EN 378).
- Never charge a system with a refrigerant other than the one on its nameplate; retrofits need manufacturer approval and oil and component checks.
- Charging, recovery and leak checks must be done and recorded by F-gas certified technicians.
R1234yf and regulations
Its very low GWP means F-gas restrictions practically do not apply. Safety rules for flammability, toxicity and pressure (EN 378 and related standards) still apply to system design, room size and charge.
Alternatives to R1234yf
Compare all refrigerants in our refrigerant guide.
Other refrigerants
R12R502R22R123R134aR404AR407CR407FR410AR417AR422DR507AR32R448AR449AR452AR454BR454CR513AR1234zeR1233zdR514AR290R600aR1270R744R717
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Frequently asked questions
What is the GWP of R1234yf?
The 100-year global warming potential (AR4) of R1234yf is about 4.
Is R1234yf flammable?
A2L: lower toxicity, mildly flammable.
What can replace R1234yf?
Depending on the application: R1234ze, R744, R513A. Conversions require manufacturer approval and oil and component checks.