R454B Refrigerant: The Blend on the Nameplate, Not the A2L Class

By SubcontractorHub Editorial Team·Published November 2026

A homeowner hears one new word on a condenser. A contractor has to write the word that is on the equipment, because the class and the product are not the same sentence. This page is the product. The class, including R-32 beside it, stays on the A2L refrigerant guide. This is not legal advice, not a charging procedure, and not a cylinder price.

What R454B Refrigerant Is on the Product Page

Arkema's Forane 454B page, fetched the day this was written, says R-454B is a blend of hydrofluoroolefin R-1234yf and hydrofluorocarbon R-32. The chemical line on that page is difluoromethane (HFC-32) and 2,3,3,3-tetrafluoropropene (HFO-1234yf). The safety table prints ASHRAE Standard 34 classification A2L, global warming potential (AR4) 466, and ozone depletion potential 0. The same page says the GWP of 466 is a 78 percent reduction compared with R-410A.

Opteon's XL41 page uses the same number: a GWP of 466, and it calls that a 78 percent reduction versus R-410A. It calls XL41 mildly flammable (A2L) and non-ozone depleting. Two manufacturers, one GWP figure, printed on their own pages. This article does not average them with a third source that was not fetched. A public search also showed a Solstice page whose snippet listed two different blend percentages. That page was not fetched, so no percentage is printed here.

Arkema says pressures and temperatures match closely those of R-410A, which is why an equipment maker can keep a similar design. That sentence is not a field instruction. The next section is the one that stops a truck from treating R454B refrigerant as a top-off for yesterday's condenser.

R454B Refrigerant Is Not a Retrofit

Arkema's page says R-454B is not a retrofit and should not be used in R-410A equipment. Read that as a ban on charging the old unit, not as a comment about how similar the pressures look. Opteon says XL41 facilitates easy conversion with minimal changes from an R-410A design, and that it allows much higher charge sizes than other flammable refrigerants. "From an R-410A design" is how a factory builds the next unit. It is not a sentence that says the unit already on the pad can take the new gas.

Write the model the manufacturer built for this blend. Do not write a swap onto an installed R-410A unit.

What EPA's Sector Page Actually Limits

EPA's Technology Transitions page for HFC restrictions by sector, fetched the same day and marked last updated August 28, 2026, opens with this: beginning January 1, 2025, certain technologies may no longer use high-GWP HFCs or HFC blends. Prohibitions apply to the manufacture, distribution, sale, installation, import, and export of products that contain restricted HFCs, and to the installation of new systems that use restricted HFCs. The page says its tables are informational and points compliance to 40 CFR Part 84, Subpart B.

On the products table, stationary residential and light commercial air conditioning and heat pumps, with window units and portable room air conditioning as the examples, carry a GWP limit of 700 and a manufacture and import compliance date of January 1, 2025. On the systems table, residential and light commercial air conditioning and heat pump systems, with mini-splits and unitary systems as the examples, also carry a GWP limit of 700 and the date January 1, 2025. The same systems line says there is no installation compliance date for systems where all specified components were manufactured or imported prior to January 1, 2025.

Footnote 5 says EPA is restricting the installation of new field-assembled systems, and that components used to repair existing systems are not subject to these restrictions. Footnote 6 sends the "no installation compliance date" line to the Technology Transitions Reconsideration Rule for more detail. This page does not restate that rule. It also does not say R-410A is banned for a repair part.

The 700 limit is a ceiling. It is not a shopping list. The row fetched today does not contain the words R454B refrigerant. A product under 700 can still be the wrong gas for the nameplate in front of you. Arkema's page says Forane 454B and Forane 32 are the only R-410A replacements that meet a GWP under 700 for regulations like the AIM Act. That "only" is Arkema's sentence about Arkema's line. Opteon sells XL41 under the same R-454B name. Do not turn one manufacturer's adjective into a market census.

Where the Manufacturers Say R454B Refrigerant Is Used

Arkema lists residential and light commercial air conditioners and heat pumps, window and portable units, mini-splits, PTACs, and chillers. Opteon's XL41 list is the same neighborhood. Those are product-page use lists, not a claim that every job in the category ships this blend. Arkema also says an A2L may need leak detection and other changes depending on charge, application, and local code. Charge limits stay in the unit's manual. The service-tool table stays on the A2L page.

How Should a Quote Name R454B Refrigerant?

Write the refrigerant the equipment was built for, next to the model. If one tier is this blend and another tier is a different listed refrigerant, say both names. A class letter alone does not tell the homeowner which condenser they are buying. The HVAC quote software page is where a proposal gets built. This article does not add a price to that proposal.

Federal refrigerant certification is a different document from the gas in the cylinder. Who has to hold it is covered on HVAC certification. A practice set for that test is the EPA 608 practice test. Neither of those pages is a substitute for the nameplate.

1. Name R454B refrigerant only when the equipment literature names it.
2. Do not describe it as a drop-in. Arkema's page says it is not a retrofit.
3. Quote EPA's 700 limit as a limit, not as a list of trade names.
4. Do not print a cylinder price. None was fetched.

What This Page Will Not Decide

Public search for R454B refrigerant returned manufacturer pages. Search for A2L refrigerant returned class explainers. That split is why this URL sits next to the class guide. A YORK page was seen and not fetched, so its dates are not quoted. No close rate and no cylinder price are printed. If the quote should carry the equipment name beside the price, book a demo and put the nameplate on the line.

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