Refrigerants: R32, R410A, R454B and R290
Four refrigerants appear across the listed range, and each model page states only the refrigerant listed for that model. This guide explains what each refrigerant means for a buyer, without turning a refrigerant name into a performance promise.
R32 and R410A: the established pair
R32 appears in the Origin and Premium inverter wall splits for Europe, and R410A appears in the Aeolus wall splits, the Premium fixed-speed mini split and the Aeolus floor standing model. R32 and R410A are the established refrigerants of the residential split market, and the choice between them is usually decided by the market and the model availability rather than by a buyer's abstract preference: a European buyer choosing an A+++ inverter model will meet R32, while a buyer choosing an Aeolus fixed-frequency or inverter model will meet R410A. The two refrigerants are not interchangeable in a unit, and a buyer should never assume a model can be recharged or converted from one to the other. The model page is the authority for which refrigerant a model uses, and the inquiry should quote the model, not just the refrigerant, when asking about availability.
R454B: the North American model refrigerant
R454B appears in the North American models: the Rex wall split, the SEER2 24 split inverter and the air handler unit. Those three models share a refrigerant and a 60 Hz supply pattern, which makes R454B the refrigerant to know for North American buying from this range. A buyer in North America should check local rules for R454B handling, servicing and recovery, because refrigerant rules are set by the destination market and change over time, and a supplier page cannot substitute for the local regulation. A buyer outside North America who is offered an R454B model should check whether that refrigerant is accepted and serviceable in their market before ordering, rather than assuming a North American model can be sold anywhere. The refrigerant name alone never qualifies a model for a market; the market's rules and the model's certification documents do that together.
R290: the heat pump refrigerant
R290 appears in the Deluxe heat pump models, where the listing describes it as high-purity propane with zero ozone depletion potential and very low global warming potential. R290 is a natural refrigerant with a flammable classification, which means installation, servicing and charge limits follow rules that differ from those for R32, R410A and R454B. A buyer planning an R290 heat pump project should confirm that their installation team is qualified for R290, that the charge size complies with local rules for the installation location, and that the building's safety provisions match the refrigerant. No numeric global warming potential value is stated on this site for R290, because none is listed in the source description, and a buyer who needs that number for a regulatory filing should ask for the document that states it. The general point stands across all four refrigerants: choose the refrigerant by market acceptance, installer qualification and model availability, in that order, and let the model page confirm which refrigerant a given model actually uses.