R407C properties
| Code | R407C |
|---|---|
| Chemical name / composition | Blend of R32, R125 and R134a R32 / R125 / R134a (23% / 25% / 52%) |
| Family | HFC blend |
| GWP (AR4, 100 years) | 1,774 |
| ODP | 0 |
| Safety class (ISO 817 / ASHRAE 34) | A1: lower toxicity, non-flammable |
| Boiling point (1 atm) | −43.6 °C |
| Temperature glide | 7.4 K |
| Charge equal to 5 t CO₂e | 2.82 kg |
| Status | Being phased down |
Where is R407C used?
- Packaged and rooftop units
- Air- and water-cooled chillers
- Heat pumps
- R22 retrofits (with oil change)
Service and safety notes
- Zeotropic blend, glide about 7.4 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.
R407C 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 R407C
- R410A: HFC blend, GWP 2,088, A1
- R32: HFC, GWP 675, A2L
- R454B: HFO/HFC blend, GWP 466, A2L
- R513A: HFO/HFC blend, GWP 631, A1
Compare all refrigerants in our refrigerant guide.
Other refrigerants
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Frequently asked questions
What is the GWP of R407C?
The 100-year global warming potential (AR4) of R407C is about 1,774.
Is R407C flammable?
A1: lower toxicity, non-flammable.
What can replace R407C?
Depending on the application: R410A, R32, R454B, R513A. Conversions require manufacturer approval and oil and component checks.