Written by the Refrigeration Team, specialists in refrigerants and European F-Gas compliance. Last updated: 30 April 2026.
The European HFC quota fell by 48% between 2023 and 2026, from 82.3 to 42.9 million tonnes of CO2 equivalent (Regulation (EU) 2024/573, Annex VII). For refrigeration professionals, the signal is clear: virgin R404A has been off the market since January 2025. And reclaimed gas will disappear in 2030.
So what should replace it? The answer depends on your existing installed base, your budget and your planning horizon. This comparison examines seven practical alternatives, with verified performance data, estimated retrofit costs and a selection guide by application type. We cross-checked data from more than 15 technical and regulatory sources to help you avoid costly mistakes.
Key Takeaways
What is the best replacement for R404A in 2026?
R448A is the best all-round compromise for retrofits in 2026, thanks to a COP 8 to 12% higher than R404A and direct compatibility with most existing systems (MDPI Applied Sciences, 2021). But every situation calls for its own analysis. Here is the comparison table.
| Refrigerant | GWP | Safety class | COP vs R404A | Direct retrofit? | Best use |
|---|---|---|---|---|---|
| R404A (ref.) | 3,922 | A1 | Baseline | – | Virgin banned, reclaimed allowed until 2030 |
| R449A | 1,397 | A1 | +5 to +10% | Yes | Commercial refrigeration, display cabinets |
| R448A | 1,387 | A1 | +8 to +12% | Yes | Supermarkets, cold rooms |
| R407F | 1,825 | A1 | -2 to +3% | Yes | Short-term transition, older systems |
| R454C | 148 | A2L | +10 to +15% | Partial | New installations, planned retrofit |
| R455A | 148 | A2L | +10 to +15% | Partial | Refrigerated transport, commercial refrigeration |
| R290 | 3 | A3 | Comparable | No | Plug-in cabinets, small charges |
| R744 (CO2) | 1 | A1 | Variable | No | Supermarkets, cold chain logistics |
Why should R404A be replaced now?
European fluorinated gas emissions fell by 38% between 2014 and 2023, but regulatory pressure is intensifying (European Environment Agency, 2024). With a GWP of 3,922, R404A is the most heavily penalised refrigerant in the European installed base. Each kilogram uses up nearly 4 tonnes of CO2 quota.
Three deadlines make replacement urgent. Since 1 January 2025, all virgin HFCs with a GWP of 2,500 or more are banned for servicing (Regulation (EU) 2024/573, Art. 13). The exemption for reclaimed gas expires on 1 January 2030.
The quotas available for 2027-2029 will drop to 21.7 Mt CO2eq, a 74% reduction compared with 2023 (Regulation (EU) 2024/573, Annex VII). Still waiting? Reclaimed R404A prices already rose by 9% in the last quarter of 2025 (Cooling Post, Q4 2025).
For a detailed look at the bans and exemptions currently in force, see our guide to the legal status of R404A in 2026.
What are the best drop-in replacements for R404A?
R448A delivers the best efficiency among the drop-ins: a COP improvement of 8 to 12% over R404A, documented in supermarket installations with average energy savings of 7.9% (Danfoss, 2025). Its direct competitor, R449A, offers a COP gain of 5 to 10%. Its cooling capacity, however, is 13% lower (Mota-Babiloni et al., ScienceDirect, 2017).
Both refrigerants share a decisive advantage: they are classified A1 (non-flammable, non-toxic). The retrofit comes down to three operations:
- Complete recovery of the existing R404A (mandatory recovery, documented in France on a BSFF waste tracking form).
- Replacement of the mineral oil with a compatible POE oil.
- Recharging with R448A or R449A, without changing the expansion valve or the compressor.
Which of the two should you favour? Our analysis of field feedback shows that R448A is better suited to centralised supermarket systems. R449A remains the preferred choice for plug-in display cabinets, where the reduced capacity is less of a problem. Few guides mention this nuance, but it avoids disappointments on site.
R407F (GWP 1,825) is a third drop-in option, but its higher GWP makes it less relevant in the long term. It remains useful for very old systems where compatibility with the other refrigerants is not guaranteed.
R449A and R448A remain the most widely used drop-in replacements for existing commercial refrigeration systems (see the catalogue at the end of this article).
Are ultra-low GWP alternatives ready for the field?
R454C and R455A, both with a GWP of 148, offer the best balance between environmental impact reduction and performance: a COP 10 to 15% higher than R404A at medium and low temperature (ScienceDirect, 2018). Their GWP is 96% lower than that of R404A. In regulatory terms, that is the difference between 3,922 tonnes of CO2 quota per tonne of refrigerant and just 148.
The main obstacle remains their A2L classification: mildly flammable. In practice, this means certified leak detectors, increased ventilation in machinery rooms and suitable electrical components. For a retrofit, expect an additional cost of 15 to 25% compared with a switch to R448A.
Field experience: On the projects where we have supported conversions to R454C, the most common mistake is not technical. It is forgetting to train maintenance staff in the specific A2L procedures. Without this training, the insurer may refuse to cover a claim. Check this point before placing any order.
Should you wait for prices to fall? No. The European refrigerant market, valued at USD 1.54 billion in 2024, is expected to reach USD 2.12 billion by 2030. HFOs are the fastest-growing segment (MarketsandMarkets, 2025). Prices will not come down.
Can natural refrigerants replace R404A?
At the end of 2025, 111,650 European sites were using transcritical CO2 systems, an increase of 17% in one year (shecco/ATMOsphere, 2025). At the same time, 19.7 million R290 (propane) plug-in display cabinets were installed in European food retail. That is growth of 15% year on year.
R290 benefits from a major regulatory change: since August 2023, the charge limit for self-contained commercial refrigeration equipment has risen from 150 g to 500 g (standard EN IEC 60335-2-89:2022). This increase opens the door to more powerful cabinets, capable of taking over applications previously reserved for HFCs.
But natural refrigerants are not retrofit solutions. R290, classified A3 (flammable), requires an entirely new circuit. Transcritical CO2 operates at pressures of 80 to 130 bar, which are incompatible with components designed for R404A (25 bar). These are strategic choices for new installations or major refurbishments.
Why do these two routes coexist? The adoption figures reveal two distinct strategies. R290 dominates small self-contained equipment (19.7 million units). CO2 is the standard in centralised systems for large-scale retail (111,650 sites). For an operator, the question is not “natural or synthetic?” but “what size of system do I need to equip?”
How much does an R404A retrofit cost in 2026?
A retrofit to R448A or R449A costs 30 to 50% less than replacing the equipment entirely, with an on-site time of 2 to 3 days (Danfoss, 2025). For a standard commercial cold room, this represents an investment of EUR 1,500 to 4,000, compared with EUR 8,000 to 20,000 for a new unit.
The main cost of a retrofit is not the refrigerant itself. It is labour and the oil change. Here is the typical breakdown:
| Item | A1 drop-in (R448A/R449A) | A2L (R454C) |
|---|---|---|
| Refrigerant (10 kg) | 300-500 EUR | 400-700 EUR |
| POE oil | 80-150 EUR | 80-150 EUR |
| Labour (2-3 days) | 800-2,000 EUR | 1,200-2,500 EUR |
| A2L safety equipment | – | 500-1,500 EUR |
| Estimated total | 1,200-2,650 EUR | 2,200-4,850 EUR |
What is the return on investment?
Energy savings offset part of the investment. With a COP improved by 10%, a cold room consuming 15,000 kWh/year saves around 1,500 kWh. That is EUR 250 to 350 per year at business electricity rates. The payback period for a drop-in retrofit is between 3 and 5 years, not counting savings on CO2 quotas.
See our analysis of R404A prices in 2026 to assess the cost of doing nothing.
Which refrigerant should you choose for your application?
If your system is less than 8 years old and working properly, choose R448A. If your system is more than 12 years old, consider going straight to a new R290 or CO2 installation. Somewhere in between? A retrofit to R454C offers the best long-term regulatory security.
| Situation | Recommended refrigerant | Why |
|---|---|---|
| Existing cold room, tight budget | R448A | Best COP, simple retrofit, A1 |
| Plug-in display cabinet | R449A or R290 (new) | R449A for retrofit, R290 for replacement |
| Supermarket, centralised system | Transcritical R744 (CO2) | GWP 1, industry standard in 2026 |
| Retrofit with 10+ years of future-proofing | R454C | GWP 148, below all future thresholds |
| Refrigerated transport | R455A | GWP 148, designed for variable conditions |
| Older system (>12 years) | Complete replacement | A retrofit prolongs equipment that is at the end of its life |
Inverted pyramid strategy: For operators managing a mixed equipment base, the best approach is to proceed in two stages. First, an immediate drop-in retrofit (R448A/R449A) to secure short-term compliance. Then, plan the transition to natural or ultra-low GWP refrigerants as equipment comes up for normal replacement. This strategy spreads the investment while ensuring compliance at every stage.
For the steps involved in a compliant purchase, see our procedure for buying R404A legally.
Frequently asked questions about R404A alternatives
Can R404A be mixed with a replacement refrigerant in the same circuit?
No. Standard EN 378 prohibits mixing different refrigerants in the same circuit. The circuit must be fully evacuated before recharging. Recovery of the existing R404A is mandatory and must be handed over to an approved collector (in France, documented on a BSFF form via Trackdéchets). Allow around 2 hours to recover a 15 kg system.
Does the compressor need to be replaced during a retrofit?
In 80 to 90% of cases, no. Compressors designed for R404A work with R448A and R449A without modification, with discharge pressures varying by 5 to 8%. Only a switch to R454C may require a replacement if the model is not A2L certified.
Is R449A permitted in new equipment after 2025?
Yes, with restrictions. R449A (GWP 1397) remains permitted for new centralised equipment and cold rooms. Since 1 January 2025, new self-contained equipment can no longer use refrigerants with a GWP of 150 or more (Regulation (EU) 2024/573, Art. 11), which rules out R449A for these applications.
What is the remaining service life of a retrofitted R404A system?
A properly executed retrofit extends service life by a further 5 to 10 years. The critical point is the tightness of the circuit: a nitrogen pressure test (25 bar, 24 hours) before the retrofit identifies leaks. If the annual leakage rate exceeds 5%, the retrofit is not economically justified.
Will the price of R404A alternatives fall in the coming years?
No, prices are likely to rise. The European refrigerant market, valued at USD 1.54 billion in 2024, is expected to reach USD 2.12 billion by 2030 (MarketsandMarkets, 2025). The continuing reduction in HFC quotas will put additional pressure on supply.
What strategy should you adopt to replace your R404A in 2026?
The market now offers three clearly differentiated families of solutions. A1 drop-ins (R448A, R449A) to secure compliance quickly and simply. Ultra-low GWP HFOs (R454C, R455A) for maximum long-term regulatory security. Natural refrigerants (R290, CO2) for new installations with a near-zero carbon footprint.
R448A remains the most balanced choice for retrofits in 2026: best COP, no A2L constraints, installation in 2 days. For new projects, transcritical CO2 is the standard in large-scale retail and R290 in self-contained equipment.
Do not wait until 2030. Prices are rising, quotas are falling and the best refrigeration engineers are already in high demand. Start with an audit of your equipment base, identify the priority systems and contact our technical team to plan your transition.
To find out more, see our related guides: legal status of R404A in 2026, prices of reclaimed R404A and buying legally with an ADC (in France, the attestation de capacité).
Disclaimer: performance data (COP, retrofit costs) are indicative and vary depending on the installation. Always consult your equipment manufacturer before carrying out any retrofit.
Ready to take action?
Order your R448A, R449A or R454C replacement refrigerants directly from our online catalogue. Delivery in 1-4 working days in France and 2-6 working days to the rest of the EU.