R422D properties
| Code | R422D |
|---|---|
| Chemical name / composition | Blend of R125, R134a and R600a R125 / R134a / R600a (65.1% / 31.5% / 3.4%) |
| Family | HFC blend |
| GWP (AR4, 100 years) | 2,729 |
| ODP | 0 |
| Safety class (ISO 817 / ASHRAE 34) | A1: lower toxicity, non-flammable |
| Boiling point (1 atm) | −43.2 °C |
| Temperature glide | 4.5 K |
| Charge equal to 5 t CO₂e | 1.83 kg |
| Status | Being phased down |
Where is R422D used?
- Retrofit of R22 chillers
- Retrofit of R22 commercial and industrial refrigeration
Service and safety notes
- Zeotropic blend, glide about 4.5 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.
R422D 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. With a GWP above 2,500 it should not be chosen for new systems; existing systems should plan a conversion. Always check the current legal text for exact dates and scope.
Alternatives to R422D
Compare all refrigerants in our refrigerant guide.
Other refrigerants
Our base is in Ankara Etimesgut. We work daily in Ankara and on a project and contract basis across Türkiye. Türkçe sayfa.
Frequently asked questions
What is the GWP of R422D?
The 100-year global warming potential (AR4) of R422D is about 2,729.
Is R422D flammable?
A1: lower toxicity, non-flammable.
What can replace R422D?
Depending on the application: R417A, R407C, R513A. Conversions require manufacturer approval and oil and component checks.