Can a refrigerant with a GWP of 1,824 honestly wear the “eco-friendly” label? The question deserves a straight answer. R407F has become the go-to alternative to R404A in commercial refrigeration, and more than 15,000 supermarkets across Europe have already adopted it (Cooling Post, 2016). But do the marketing claims survive a rigorous carbon audit? This article works through the numbers without flinching.
Key Takeaways
Is R407F really an eco-friendly refrigerant?
R407F has a GWP of 1,824, which is 53% below the 3,922 of R404A on IPCC AR4 values. That is a real gain. But calling the gas “eco-friendly” needs perspective. CO2 has a GWP of 1. Propane sits at 3. Against those natural refrigerants, R407F remains a high-impact HFC, not a clean-sheet solution.
So why have so many chains adopted it? Because R407F is the best available compromise for systems already in the ground. Replacing a full installation with transcritical CO2 costs €200,000 to €500,000. Converting to R407F costs €3,000 to €8,000. Across a 200-store estate, that difference runs into tens of millions. In practice, facilities managers pick the option that cuts emissions now, with the budget they actually have.
The accurate term is “transition refrigerant”. It is neither eco-friendly in the strict sense nor acceptable long term. But it delivers an immediate, measurable cut in the carbon footprint of systems that will keep running for another 5 to 10 years. For the full picture of low-GWP options, see our low-GWP refrigerant guide.
How many tonnes of CO2 does switching to R407F avoid?
A typical commercial installation charged with 500 kg of R404A at a 15% annual leak rate emits 294 tonnes CO2eq per year in direct emissions (500 x 0.15 x 3,922). Switch to R407F and that figure falls to 137 tonnes CO2eq (500 x 0.15 x 1,824), on IPCC AR4 values. That is roughly 157 tonnes CO2eq avoided every year, per installation.
These numbers are not plucked from thin air. The 15% leak rate is the low-end average for commercial installations, per the International Institute of Refrigeration (IIR, 2021). Older sites reach 25%. Climalife confirmed savings above 140 tonnes CO2eq per system per year in field trials (Climalife, 2014).
But the TEWI (Total Equivalent Warming Impact) calculation does not stop at direct emissions. You also add the indirect emissions from electricity use. And this is where R407F brings a second advantage: 7 to 20% energy savings in medium-temperature applications, which cuts the indirect footprint too. Can a manager really afford to ignore that combined saving?
What does an R407F conversion really cost in 2026?
An R404A to R407F retrofit costs between €3,000 and €8,000 per commercial system, depending on size and complexity. That figure covers labour, the refrigerant, a POE oil change where needed, and replacement of filter driers. The price of reclaimed R404A rose 9% in Q4 2025 (Cooling Post), which strengthens the economic case for converting sooner.
Where does the €3,000 to €8,000 spread come from? A small reach-in cabinet with a 20 kg charge converts quickly. A central pack feeding 15 cases with a 300 kg charge needs more time and more fluid. The costs split roughly like this: 40-50% refrigerant, 30-35% labour, 15-20% parts (driers, seals, oil).
Wait or act now? The price of virgin R404A only moves one way: up. HFC quotas tighten every year under Regulation (EU) 2024/573. Each quarter of delay raises the cost of the remaining R404A charge. For the step-by-step conversion procedure and pressure-temperature data, see our complete R407F technical guide.
What return on investment can you expect?
The payback on an R407F conversion lands between 1.5 and 3 years on energy savings alone. A 2,500 m² supermarket uses around 900 kWh/m²/year in total energy, of which 50% goes to refrigeration, so about 1,125 MWh/year. At an average €0.20/kWh, that is €225,000/year spent on cooling.
At 10% energy savings, that is €22,500 recovered every year. A €6,000 conversion pays for itself in under four months on the electricity bill alone. Even at 7% (the conservative low-temperature case), payback arrives in under a year. And those savings stack, year after year. Where commercial electricity is dearer than €0.20/kWh, the payback only gets shorter.
Where do the savings figures come from? Intermarché measured 10% savings across its converted stores (Honeywell/Cooling Post). ASDA documented 14 to 20% gains in medium-temperature applications (Honeywell release, 2016). Les Salaisons du Maconnais confirmed 7% at -22°C (Climalife/Safriclim, 2014). Can you reasonably ignore that margin on a load worth half the energy bill?
There is a second financial lever too: avoided R404A cost. Every R404A recharge gets more expensive. On a system leaking 15% a year, that is 75 kg for a 500 kg charge, so the saving on fluid price adds to the energy gains. Operators report this line item sometimes becomes more significant than the energy itself.
Which retailers have already made the switch?
Intermarché documented 10% energy savings across its converted stores (Honeywell/Cooling Post). ASDA, the UK chain, rolled R407F out across its estate, projecting savings above 625,000 tonnes CO2eq over 14 years (Honeywell release, 2016). On the ground, Les Salaisons du Maconnais measured 7% savings at -22°C (Climalife/Safriclim, 2014).
From field feedback, several other large grocers ran conversion programmes across part of their estates. Results vary with the age of the installation and the quality of the work. One point comes up every time: stores that fine-tuned the expansion valve after conversion get the best numbers. Those that settled for a simple fluid swap stall at 5-6% savings.
What separates successful conversions from disappointing ones? Post-conversion calibration. R407F does not share the thermodynamic properties of R404A. Discharge temperatures run 10 to 15 K higher. Without adjusting the expansion valve and checking superheat, you capture only a fraction of the potential. For the technical detail of those adjustments, see our R407F technical guide.
Is R407F suitable for every commercial installation?
No. R407F performs best in medium-temperature refrigeration, between -5 and +5°C, with 10 to 20% energy savings documented. At freezing temperatures below -30°C, the advantage narrows to 5-7% (Climalife study). Not every installation is a good candidate.
A quick decision grid for operators. Existing R404A system with more than 3 years of remaining life: conversion recommended. Medium-temperature application (chilled cabinets, chilled rooms): optimal 10-20% gain. POE oil already installed: direct compatibility, no oil flush needed. Low-temperature freezing application: conversion possible, but gains drop to 5-7%, so watch the discharge temperature.
For a brand-new installation, however, R407F is no longer the right choice. Transcritical CO2 and propane (R290) systems offer near-zero GWP and are now technologically mature. The most advanced retailers reserve R407F for retrofits and choose natural refrigerants for new stores. For a comparison of R404A alternatives, see our low-GWP refrigerant guide.
How do you keep an R407F system performing?
Regular monitoring is the key. The leading cause of performance loss is the slow leak, which shifts the composition of the zeotropic blend (IIR, 2021). Unlike R404A (near-azeotropic), R407F is a blend of R32, R125 and R134a that does not leak uniformly. A leak alters the component ratio and degrades the COP.
What habits matter day to day? Four watch points for technical managers. First, schedule leak checks at least every six months. It is an F-Gas legal requirement for systems holding more than 5 tonnes CO2eq. Second, monitor the discharge temperature, since R407F runs 10 to 15 K hotter than R404A.
Third, watch for any drop in cooling capacity. If cabinets struggle to hold the set point, that can signal a composition shift from a leak. Fourth, keep a maintenance log compliant with F-Gas requirements. These records are mandatory and checked during inspections.
What are the limits of R407F?
Virgin R407F will be banned for servicing from January 2032, under Article 13 of Regulation (EU) 2024/573. That leaves about six years of legal use with new gas. After that date, only recycled or reclaimed R407F will be available to service existing installations.
Should that deadline worry you? Not immediately. Six years is enough to amortise a conversion and reap the economic benefit. But it is also a clear signal: R407F is not a destination, it is a step. Operators converting today should build the move to natural refrigerants into their 10-year plan for the next generation of installations. For the full trajectory, see our EU F-Gas regulation guide.
Frequently Asked Questions
Is R407F an eco-friendly gas?
Partly. R407F has a GWP of 1,824, which is 53% below R404A (3,922) on IPCC AR4 values. That is measurable progress, but it remains an HFC with a high climate impact compared with natural refrigerants like CO2 (GWP 1) or propane (GWP 3). It is a transition refrigerant, not a permanent solution.
How much does an R404A to R407F conversion cost?
Between €3,000 and €8,000 per system, depending on size. The cost covers the R407F refrigerant, certified labour, a POE oil change where needed, and replacement filter driers. Operators with multiple systems can often negotiate volume rates with refrigeration contractors.
What energy savings can you expect from R407F?
Savings range from 7 to 20% by application temperature. In medium-temperature refrigeration (0 to +5°C), gains reach 10 to 20% (Honeywell/Cooling Post, ASDA). In low-temperature freezing (-22°C), they are around 7% per the Climalife/Safriclim study. The higher the evaporating temperature, the better R407F performs.
Will R407F be banned in 2032?
Virgin gas will be banned for servicing from January 2032, under Article 13 of Regulation (EU) 2024/573. Recycled or reclaimed R407F will remain available after that date. Operators therefore have around six years to plan the transition to lower-GWP solutions.
Do you need certification to handle R407F?
Yes. Handling HFC refrigerants in stationary commercial refrigeration requires F-Gas personnel certification under Regulation (EU) 2015/2067. As an HFC blend, R407F may only be charged, recovered or transferred by certified technicians, and the work must be logged.
Can R407F directly replace R404A?
No, not as a direct drop-in. A retrofit is needed: recover the R404A, check POE oil compatibility, replace the filter driers and recalibrate the thermostatic expansion valve. The full procedure is in our R407F technical guide. The job usually takes about a day per system.
What to remember
R407F is not an eco-friendly refrigerant in the strict sense. It is a transition refrigerant that cuts direct emissions 53% versus R404A while trimming the energy bill by 7 to 20%. For technical managers running an estate of R404A systems, the conversion remains the best short-term investment.
- Audit your R404A systems: charge, age, estimated remaining life.
- Calculate your potential TEWI savings using the formulas in this article.
- Request quotes from certified technicians (at least two for comparison).
- Schedule conversions before the price of R404A climbs further.
- Plan natural refrigerants (CO2, R290) for any new installation.
R407F in professional packaging is stocked by specialist suppliers such as Refrigeration Store. For the full technical properties, pressure-temperature tables and the step-by-step conversion procedure, see our complete R407F technical guide.
About the author: Stefan Meier is a refrigeration systems specialist with 14 years of experience in commercial and industrial refrigeration across Europe. He holds EU F-Gas Category I certification and advises operators on refrigerant transition strategies.
Last updated: June 2026. This article reflects Regulation (EU) 2024/573 in force at the date of publication. TEWI calculations use IPCC AR4 GWP values and a 15%/year leak rate (IIR, 2021). Verify current rules with your national authority.