R454B Refrigerant Gas

What R454B is and where it is used

R454B (also written R-454B) is an HFC/HFO blend of R32 and R1234yf in a 68.9/31.1 mass ratio, with an AR4 GWP of 466. Installers across Ireland, the Benelux, the Nordics and the Baltics meet it in residential split air conditioning, air-to-air and air-to-water heat pumps, and light commercial AC units and chillers. It is one of the lower-GWP gases that equipment makers use in new designs that previously would have run on R410A.

R454B is a zeotropic blend with a measurable glide. Charge it from the liquid phase and weigh every charge on a scale, following the nameplate quantity of the unit.

A2L safety: only for equipment designed for R454B

R454B is classified A2L, meaning lower toxicity and mild flammability. Use it only in equipment that the manufacturer designed and rated for R454B. It is not a retrofit gas for R410A systems, and it must never be mixed with R410A or added to a circuit built for an A1 refrigerant. On site, ventilate the work area, keep ignition sources away, and use recovery machines, vacuum pumps and leak detectors approved for A2L gases. Pressure test with nitrogen, and respect the charge and room-size limits in EN 378 and EN 60335-2-40.

R454B under Regulation (EU) 2024/573 in 2026

The Article 13 servicing bans hit gases with a GWP of 2,500 or more: refrigeration equipment since 1 January 2025, air conditioning and heat pumps since 1 January 2026. At 466, R454B is far below that line, so servicing R454B units remains permitted. All the usual obligations stay in place: certified personnel, recovery instead of venting, cylinder labels showing GWP and CO2e, and service records under Article 7. Whether a new product may be placed on the market depends on its own category in Annex IV, which the equipment manufacturer must check.

R454B, R410A and R32

For installed R410A equipment, keep servicing with R410A: its GWP is below 2,500, so the servicing ban does not apply to it. For new projects, R454B and R32 are the two common A2L routes, and the unit's design decides which one goes in. The R1234yf component also appears on its own in our R1234yf range. All air conditioning and heat pump gases are listed on the air conditioning gas page.

Choosing a pack size

Each cylinder holds 10 kg of R454B, equal to 4.66 t CO2e. A single cylinder covers occasional commissioning. Packs of 3, 5, 10, 15 or 20 cylinders give 30 to 200 kg and cost less per kg than buying cylinders one at a time. Log the CO2e of what you charge, not only the kilograms.

Delivery and who may buy R454B

R454B ships from our Fréjus and Riga warehouses to all 27 EU member states: 1-4 working days within France, 2-6 working days elsewhere. Pallet orders go by freight on a confirmed date. At checkout, choose your buying basis (certified technician, company employing certified staff, or resale) and give the certificate number and issuing country under Regulation (EU) 2024/573 and Implementing Regulation (EU) 2015/2067. R454B orders are released once that check is complete. Cylinders are returnable to Riga for refilling, and EU companies with a valid VAT number pay no VAT under reverse charge.