R134a increasingly less available: what changes in service

The progressive reduction in HFCs released onto the European market is beginning to have increasingly tangible effects on the availability of traditional refrigerants. One of the most obvious cases concerns R134a , still present in many existing systems and characterized by a GWP of 1,430 according to the European F-Gas Regulation.

The automotive air conditioning sector is already experiencing growing supply difficulties for servicing older vehicles, but the phenomenon is also of concern for the refrigeration and broader HVACR sector. The new European phase-down will drastically reduce the overall quantities of HFCs available in the coming years, increasing the strategic value of recovery, recycling, regeneration, and proper planning for system replacement.

R134a and HFC phase-down: available quantities will continue to decrease

EU Regulation 2024/573 introduced a much faster reduction trajectory for hydrofluorocarbons.

The maximum quantity of HFCs that can be placed on the European market will increase from 42.87 million tonnes of CO₂ equivalent in the period 2025-2026 to 21.67 million in 2027-2029, before dropping to approximately 9.13 million between 2030 and 2032. From 2050, the planned quota will become zero.

The mechanism doesn't apply exclusively to R134a: quotas are calculated for all HFCs in terms of CO₂ equivalent. However, a refrigerant with a relatively high GWP absorbs a greater amount of quota for each kilogram placed on the market.

Therefore, as overall availability becomes tighter, fluids such as R134a may come under increasing pressure in terms of availability and cost, especially while a significant installed base remains active and requires maintenance.

Automotive air conditioning is a concrete example. Since 2017, European regulations have prohibited the use of systems designed for refrigerants with a GWP greater than 150 in new vehicles, but still allow the recharging of older systems that already used these gases.

The result is a situation typical of technological transitions: demand for new installations decreases faster than the need for service on the existing fleet.

Recovery and regeneration are becoming increasingly important

For professional refrigeration, the decrease in virgin HFCs makes it even more important to avoid losses during maintenance and decommissioning.

In fact, when technically and legally possible, the R134a recovered from a device can be sent for recycling or regeneration, keeping the refrigerant within the supply chain instead of requiring new virgin quantities.

The new F-Gas Regulation reinforces this very logic. From 1 January 2032, the use of fluorinated gases with a GWP of 750 or more will be prohibited for the maintenance and servicing of stationary refrigeration equipment—excluding chillers. However, the regulation provides specific exceptions for reclaimed and recycled refrigerants used in existing systems under the conditions established by the Regulation.

Since R134a has a GWP of 1,430, this deadline directly affects stationary refrigeration systems that still use it, with the exception of chillers.

For technicians and operators it is therefore becoming increasingly important:

• correctly recover the refrigerant during interventions;
• limit circuit losses;
• do not contaminate different fluids during recovery;
• identify and trace the extracted refrigerant;
• assess future availability for the service in advance;
• schedule any retrofits or replacements before they become urgent.

The availability of recovered gas thus becomes a component of the operational continuity of existing plants.

Replacing R134a doesn't simply mean changing the refrigerant

The progressive reduction in availability may push owners and maintenance personnel to evaluate alternative refrigerants . However, replacement should not be approached as a simple fluid change.

The European Commission identifies several alternatives to R134a in refrigeration applications, including CO₂ (R744), propane (R290), ammonia (R717), HFOs and lower GWP HFC/HFO blends.

However, the characteristics of these solutions are very different. Operating pressures, flammability, compatibility with lubricants and components, exhaust temperatures, and thermodynamic performance must be evaluated on a case-by-case basis.

Some synthetic alternatives can also reduce GWP compared to R134a, but they are not automatically interchangeable with it. A retrofit therefore requires verification of :

• compressor and operating range;
• expansion valves;
• gaskets and materials;
• lubricant;
• cooling capacity;
• energy efficiency;
• safety requirements;
• applicable legislation.

The choice must also consider the long-term perspective. Adopting a refrigerant now that will face new restrictions within a few years could reduce the cost benefits of retrofitting.

The service enters a transition phase

The R134a case highlights a problem that is set to become increasingly common in the HVACR sector: new systems can change refrigerant quickly, but existing systems cannot.

For many years, engineers and companies will have to simultaneously manage equipment designed for traditional HFCs, new low-GWP synthetic refrigerants, and natural refrigerants.

The transition will therefore require not only new technologies, but more careful management of the fluids already present in the systems.

Recovery, regeneration, loss reduction, and retrofit planning thus become part of the same strategy. The goal is to prevent the progressive shortage of certain refrigerants from turning a routine maintenance intervention into a problem of availability, costs, or service continuity.