The New Refrigerant and What It Could Mean for You

AC refrigerant has undergone two major changes since its introduction. R-22 was the standard for years until scientists discovered it was too harmful to the ozone layer. 

The industry then switched away from R-22 and hydrochlorofluorocarbons to hydrofluorocarbons such as R-410A, which did not cause any ozone depletion. However, it soon became clear that R-410A was a powerful greenhouse gas and contributed to climate change, which led to its phase-out in January 2025.

Switching to the New R-454B Refrigerant

To reduce the impact on the environment and prevent greenhouse effects, the industry has switched refrigerants again — this time to the new R-454B refrigerant, which has a lower global warming potential (GWP). This switch has some impact on consumers.

Old Systems Can’t Use R-454B

You can’t simply have your local HVAC tech pump the new R-454B refrigerant into your existing system. If you want to upgrade, you’ll need a new air conditioner. 

If you were planning on installing a new system anyway, all new systems use the new refrigerant, so you won’t have to worry about compatibility. However, if you have a fairly new system that uses R-410A, it will need to continue using that refrigerant.

R-410A Is Still Around (For Now)

While you can still source R-410A for your air conditioner, that refrigerant is no longer made. It’s plentiful now but will be harder to get as time goes on. Also, parts for R-410A systems will become more difficult to source. R-454B will be cheaper in the long run.

R-454B Can Be More Efficient

Depending on the design and lubricants used in an AC system, R-454B can have superior heat transfer efficiency. This puts less strain on the compressor and can help it last longer.

R-454B Has Low Toxicity and Is Slightly Flammable

Both R-410A and R-454B have low toxicity ratings, but while R-410A has zero flammability, R-454B can be flammable in the right circumstances.

R-454B Is Far Better for the Environment

The GWP of R-454B is 466, which is 78% lower than R410A’s GWP of 2,088. It’s no contest as to which one is better for the planet!

Turn to Comfort Control Mechanical When You Need a Refrigerant Recharge

Whether you’re sticking with R-410A for now or want a new system to take advantage of the new R-454B refrigerant, the experts at Comfort Control Mechanical will get your system charged up. If you have any questions or concerns before you make the switch, we’ll put your mind at ease. Contact Comfort Control Mechanical today!