In shortR449A is a non-flammable alternative for R404A, R507A and R22 commercial refrigeration, with properties very close to R448A.
R449A properties
| Code | R449A |
|---|---|
| Chemical name / composition | Blend of R32, R125, R1234yf and R134a R32 / R125 / R1234yf / R134a (24.3% / 24.7% / 25.3% / 25.7%) |
| Family | HFO/HFC blend |
| GWP (AR4, 100 years) | 1,397 |
| ODP | 0 |
| Safety class (ISO 817 / ASHRAE 34) | A1: lower toxicity, non-flammable |
| Boiling point (1 atm) | −46.0 °C |
| Temperature glide | 4.0 K |
| Charge equal to 5 t CO₂e | 3.58 kg |
| Status | In common use |
Where is R449A used?
- Supermarket and commercial refrigeration
- Cold rooms
- R404A / R507A / R22 retrofits
Service and safety notes
- Zeotropic blend, glide about 4.0 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.
R449A 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 R449A
- R448A: HFO/HFC blend, GWP 1,387, A1
- R744: Natural refrigerant, GWP 1, A1
- R290: Hydrocarbon (natural), GWP 3, A3
Compare all refrigerants in our refrigerant guide.
Other refrigerants
R12R502R22R123R134aR404AR407CR407FR410AR417AR422DR507AR32R448AR452AR454BR454CR513AR1234yfR1234zeR1233zdR514AR290R600aR1270R744R717
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Frequently asked questions
What is the GWP of R449A?
The 100-year global warming potential (AR4) of R449A is about 1,397.
Is R449A flammable?
A1: lower toxicity, non-flammable.
What can replace R449A?
Depending on the application: R448A, R744, R290. Conversions require manufacturer approval and oil and component checks.