Solstice Advanced Materials launches R-134a retrofit concept

The Direct-to-YF (DTYF) 134a retrofit concept was introduced at Automechanika Frankfurt 2026, and is intended for professional workshops servicing the large installed base of vehicles that continue to operate with R-134a air conditioning systems.

It aims to enable professional workshops to accommodate R-1234yf without needing to replace or modify existing 134a air conditioning system components.

Vice President and General Manager, Automotive Refrigerants at Solstice Advanced Materials, Rick Winick, says the European aftermarket is currently servicing a vehicle fleet that includes more than 100 million R-134a systems alongside newer vehicles operating with R-1234yf.

“The Direct-to-YF retrofit concept has been developed over the last three years to help address the need for a more widely available refrigerant option for older R-134a vehicles,” he says.

The process consists of three steps:

1. Recover the remaining R-134a refrigerant from the vehicle system and repair the leak
2. Fit a pair of newly designed snap-on 134a to R-1234yf adapters to the vehicle
3. Inject a small amount of a specially developed oil additive designed to optimise oil return to the compressor before recharging the vehicle system withR-1234yf. The new R-1234yf refrigerant identification label is then applied under the hood.

Workshops across Europe have been servicing both R-134a and R-1234yf vehicles for years and are already equipped with the necessary recovery, recycling and recharging (RRR) equipment for both refrigerants used in this process.

“We have made this retrofit option easy for technicians to adopt,” says Winick.

“Independent technical evaluations and risk assessments have concluded that retrofit use is acceptable within the same assessment framework applied to new vehicle air conditioning systems. These conclusions are based on independent reports assessing retrofit performance and the use of R-1234yf in retrofit-suitable vehicle air conditioning systems.”

The implementation of the European Union’s F-Gas Regulation (2024/573) continues to drive the phasedown of hydrofluorocarbon (HFC) refrigerants through a quota-based system. Solstice Advanced Materials says R-1234yf is fully compliant with the mobile air conditioning systems (MAC) Directive (2006/40/EC) for new passenger vehicle air conditioning systems.

In April 2026, the Australian government listed hydrofluorocarbons (HFCs) and some HFC alternatives on the Industrial Chemicals Environmental Management Standard (IChEMS) workplan for 2026–27, signalling that new restrictions on refrigerant use and pre-charged equipment are in the works.

The Department of Climate Change, Energy, the Environment and Water (DCCEEW) said possible measures may include restrictions on what certain HFCs can be used for, including in pre-charged equipment. This may include restrictions on use of R-134a in new vehicles.

Under Australia’s HFC (hydrofluorocarbons) phase down, availability of high global warming potential (GWP) refrigerants including R-134a, R-404A and R-410A will become increasingly limited, with rising costs and potential difficulty servicing equipment that relies on these gases.

More information on the Direct-to-YF (DTYF) 134a retrofit concept is available here.

Feature image courtesy of Solstice Advanced Materials.

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