R-454B

R-454B, also known by the trademarked names Opteon XL41, Solstice 454B, and Puron Advance, is a zeotropic blend of 68.9 percent difluoromethane (R-32), a hydrofluorocarbon, and 31.1 percent 2,3,3,3-tetrafluoropropene (R-1234yf), a hydrofluoroolefin.^[1] Because of its reduced global warming potential (GWP), R-454B is intended to be an alternative to refrigerant R-410A in new equipment.^[2][3][4] R-454B has a GWP of 466, which is 78 percent lower than R-410A's GWP of 2088.^[2]

R-454B is non-toxic and mildly flammable, with an ASHRAE safety classification of A2L. In the United States, it is expected to be packaged in a container that is red or has a red band on the shoulder or top.^[2][5][6]

History

The refrigeration industry has been seeking replacements for R-410A because of its high global warming potential. R-454B, formerly known as DL-5A, has been selected by several manufacturers, including Mitsubishi Electric, Carrier, Johnson Controls, and others.^{[4][7][8][9][10]}

R-454B was developed at and is manufactured by Chemours. Carrier first announced introduction of R-454B in ducted residential and light commercial packaged refrigeration and air conditioning products in 2018, with R-454B-based products launches starting in 2023.^[11]

Related refrigerants

R-454B is not the only blend of R-32 and R-1234yf to be proposed as a refrigerant. Other blends include R-454A (35 percent R-32, 65 percent R-1234yf) and R-454C (21.5 percent R-32, 78.5 percent R1234yf). There are also several blends that include a third component.^[1]

See also

• R-410A, a refrigerant that is being phased out, and which R-454B is a popular replace for
• Difluoromethane, R-32, another R-410A replacement
• List of refrigerants

References

1. "ASHRAE Refrigerant Designations". Retrieved June 27, 2021.
2. "Opteon XL41 product information". Retrieved June 27, 2021.
3. "Solstice 454B product information". Retrieved June 27, 2021.
4. "Carrier Introduces Puron Advance" (Press release). December 19, 2018.
5. "Protection of Stratospheric Ozone: Listing of Substitutes Under the Significant New Alternatives Policy Program". Federal Register. 86 (86). United States Environmental Protection Agency: 24444–24474. May 6, 2021.
6. "AHRI Guideline N: 2017 Guideline for Assignment of Refrigerant Container Colors" (PDF). Retrieved June 27, 2021.
7. "Opteon XL41 (R-454B) and Opteon XP10 (R-513A) Refrigerants selected by Mitsubishi Electric Hydronics and IT Cooling Systems SpA (MEHITS) Applications" (Press release). May 27, 2019.
8. "Honeywell to offer R454B as alternative to R410A". March 13, 2021.
9. "Johnson Controls moves to R454B". May 27, 2021.
10. "Behavior of R410A Low GWP Alternative Refrigerants DR-55, DR-5A, and R32 in the Components of a 4-RT RTU DR-5A, and R32 in the Components of a 4-RT RTU". Purdue University Purdu. 2016. Retrieved June 30, 2021.
11. "Carrier Introduces Puron Advance™: The Next Generation Refrigerant for Ducted Residential, Light Commercial Products in North America". Carrier Corporation (since 2020 Carrier Global Corporation). 2018-12-19. Retrieved 2021-07-26.