In shortR452A replaces R404A mainly in transport refrigeration and low-temperature applications. Its discharge temperature is close to R404A, which makes retrofits easy.
R452A properties
| Code | R452A |
|---|---|
| Chemical name / composition | Blend of R32, R125 and R1234yf R32 / R125 / R1234yf (11% / 59% / 30%) |
| Family | HFO/HFC blend |
| GWP (AR4, 100 years) | 2,140 |
| ODP | 0 |
| Safety class (ISO 817 / ASHRAE 34) | A1: lower toxicity, non-flammable |
| Boiling point (1 atm) | −47.0 °C |
| Temperature glide | 3.8 K |
| Charge equal to 5 t CO₂e | 2.34 kg |
| Status | Being phased down |
Where is R452A used?
- Truck and container refrigeration
- Low-temperature commercial refrigeration
Service and safety notes
- Zeotropic blend, glide about 3.8 K: always charge in liquid phase; after a large leak, recover and recharge the full system. Use dew point for superheat and bubble point for subcooling.
- Non-flammable and low toxicity (A1). A large leak in a closed room can still displace oxygen, so gas detection is recommended in small plant rooms.
- 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.
R452A and regulations
Covered by Türkiye's Regulation on Fluorinated Greenhouse Gases (Official Gazette, 15 October 2024). HFC supply is being phased down with quotas, high-GWP gases are restricted earlier, leak-check intervals depend on the CO₂-equivalent charge, and handling requires certified technicians. Always check the current legal text for exact dates and scope.
Alternatives to R452A
- R448A: HFO/HFC blend, GWP 1,387, A1
- R449A: HFO/HFC blend, GWP 1,397, A1
- R744: Natural refrigerant, GWP 1, A1
Compare all refrigerants in our refrigerant guide.
Other refrigerants
R12R502R22R123R134aR404AR407CR407FR410AR417AR422DR507AR32R448AR449AR454BR454CR513AR1234yfR1234zeR1233zdR514AR290R600aR1270R744R717
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Frequently asked questions
What is the GWP of R452A?
The 100-year global warming potential (AR4) of R452A is about 2,140.
Is R452A flammable?
A1: lower toxicity, non-flammable.
What can replace R452A?
Depending on the application: R448A, R449A, R744. Conversions require manufacturer approval and oil and component checks.