It was invented in the 1920s and was used in homes until the 1950s, after which R22 became the most popular compound. However, R12 continued to be used in cars until 1994. At this time, the Environmental Protection Agency mandated that all new vehicles use R134A instead.
But Freon was shown to deplete the earth's vital ozone layer. So carmakers were mandated to stop using R12 after the 1994 model year. One current replacement refrigerant is R134a, which serves the same purpose as Freon but is less harmful to the environment.
So to answer your question, the conversion from R-12 to R-134a began in the late 1980s, and many automakers had already made the switch to R-134a by the early 1990s. However, the use of R-12 in existing vehicles continued for several years, and some older vehicles may still have R-12 systems today.
Limited quantities of reclaimed R-12 is still available for service of installed equipment. A wide variety of R-12 retrofit blends are available.
Finding out which refrigerant your vehicle uses is easy with the help of A/C Pro®. The first place to look for this information is under the hood. Pop the hood and look for a label, which is usually white or bright yellow. On this it will either say “R-134a” or “R-1234yf,” and it may even say what the capacity is.
R134a systems work at higher discharge-side pressures than R12 systems, which could lead to compressor seals leaks. Additionally, since R134a is composed of much smaller molecules, it has a greater chance of leaking from an R12 system.
R-134a cylinders are colored light blue. A phaseout and transition to HFO-1234yf and other refrigerants, with GWPs similar to CO2, began in 2012 within the automotive market.
Or, if you'd like to tackle the job yourself, AutoZone has all the tools and refrigerant to service your R-134A or R-12 vehicle.
The evaporator exit superheat was maintained constant at 13.5 F (7.5"C) for all tests. The experimental results show that for almost all test conditions the R·134a operates with greater COP and cooling capacity.
On January 1, 2020, the U.S. Environmental Protection Agency (EPA) banned the production and import of R-22. But units manufactured in 2009 and earlier still use R-22 today. Its use will eventually be eliminated in the U.S., so all current and future homeowners must be prepared for the transition.
Why Is R-134A Being Phased Out? When Is the Phaseout Expected to Conclude? Like a lot of '90s relics, R-134A has not aged well. It was known then that 1,1,1,2-tetrafluoroethane could potentially contribute to acid rain and that its ozone layer depletion potential was high.
Fourth, all of the R12 should be completely removed from the system before the R-134a is added. If mixed, the two refrigerants can form a high pressure azeotropic gas mixture. The higher operating pressure puts more stress on the compressor and seals, which can cause premature compressor failure or simple leakage.
Recently, auto manufacturers have switched to a new type of freon that is even better for the environment. R134a freon was “totally banned” for auto manufacturers in the European Union in 2017. Meanwhile, US manufacturers were required to phase out R134a freon by the 2022 model year.
R-134a is an HFC refrigerant and cannot be vented under the Venting Prohibition because it is a non-exempt substitute of CFCs and HCFCs. Question #8 Nitrogen can be used to pressurize or blow debris out of a system containing a half charge of refrigerant.
The properties of RS-24 make it an almost perfect match for R12 with its compatibility for traditional and synthetic lubricants, similar performance, lower discharge temperature, non-flammability and relatively short atmospheric lifetime.
This group of synthetic refrigerants is not subject to a ban on use. This means that installations using R134a, R407C and R410A can simply be refilled after 2030. However, there will be significantly less synthetic refrigerant available in the future due to production limitations.
Refrigerant R513A - Drop-In Alternative for R134a. R513A was developed as a replacement refrigerant for R134a. R513A is a modern, non-flammable refrigerant designed to replace R134a in a wide range of applications. It provides a sustainable solution for both new systems and retrofits.
R-410A is not only better for the ozone layer; it also provides a better overall operation. It absorbs and releases the heat better than R-22, making your compressor run cooler so that it does not overheat.
R134a is a potent greenhouse gas and therefore has 1,430 times the warming potential of carbon dioxide. As a result, lower GWP and eco-friendly refrigerant options are already replacing R134a across many industries. New vehicles sold in the United States after 2021 can't use R134 in their air conditioners.
The Duracool 12a is used to replace the R12 and R134a gases and owes its success to its ecological qualities. It is an hydrocarbon gas with zero impact on the ozone layer. It requires only 35% of the load weight of the R12 and 40% of that of the 134a.
Switching to R1234yf refrigerant is a step towards a greener future, but it comes with higher costs due to advanced equipment, stringent regulations, and specialized training.
Non-flammable material. Overexposure may cause dizziness and loss of concentration. At higher levels, CNS depression and cardiac arrhythmia may result from exposure. Vapors displace air and can cause asphyxiation in confined spaces.
The AIM Act is a Federal nationwide rule phasing out the use of global warming materials. As part of that effort, EPA is now banning the use of 134a in aerosol products as of 1/1/2025. There are excepted products that are allowed to use 134a until 1/1/2028.
What refrigerant will replace R-410A in 2025? For whole-home systems, Lennox has chosen 2025 Compliant Refrigerant R-454B due to its excellent performance for ducted systems and zero ozone depletion potential. For mini-splits, we selected R-32, designed to optimize efficiency and reliability in ductless systems.
R134A Refrigerant Prices
Get free estimates from air conditioning repair services near you. R134A refrigerant costs $4 to $10 per pound wholesale or $50 to $110 per pound installed. Only a handful of home air conditioner units use R134A refrigerant as a standard.