R32 air conditioner F-gas checks before you buy

A pre-gassed R32 air conditioner can look almost ready to fit when it arrives: indoor unit, outdoor unit, pipe kit and refrigerant already supplied. The important detail is that pre-gassed does not mean the F-gas work is already done. Before you order a wall split in the UK, confirm what refrigerant it contains, whether the equipment is hermetically sealed, and which qualified installer has agreed to connect and commission your particular unit.

This guide was prepared by the Products Compared editorial team from UK marketplace listings and public guidance from GOV.UK, REFCOM and Checkmark in October 2026. We did not laboratory-test the products. If you purchase through a qualifying affiliate link, Products Compared may earn a commission at no extra cost to you.

In short

R32 remains a permitted refrigerant in many new domestic single-split systems, but the equipment still needs the correct installation route. If refrigerant connections are made on site, arrange the installer before buying. A seller's pre-gassed description is not proof that you can legally or safely fit the system yourself.

What the 2025 single-split ban actually says

The 2025 rule is narrower than claims that split air conditioning has been banned. GOV.UK says new single-split systems containing less than 3 kg of F-gas cannot use a gas with a global warming potential, or GWP, above 750. Exceptions include larger systems, some product-cooling refrigeration, air-to-water splits and equipment on maritime craft. It limits new equipment placed on the market. It does not ban every air conditioner already fitted in a British home.

That threshold helps explain the move away from R410A in small new single splits. Checkmark gives R410A a GWP of 2,088 and R32 a GWP of 675, on opposite sides of 750. GWP is not the charge in kilograms on the unit label. None of the listings here stated a charge, so do not infer one from cooling capacity.

Check the exact model. An older marketplace title or a vague eco-refrigerant claim does not show that the equipment meets the current rule. Our split air conditioner comparison can narrow the products, but refrigerant and installation evidence still need checking on the listing.

What R32 on a listing tells you

An R32 label identifies the refrigerant, and its GWP of 675 puts it below the 750 limit for the small new single-split category. It does not establish the charge, whether the room is suitable, who may open the circuit, or whether an engineer will accept an internet-supplied unit.

Six of the nine marketplace files reviewed for this topic name R32 in both the title and a bullet: B0HBN23387, B0GYPN1724, B0H8Q2VCMK, B0HCPN1S2P, B0HCX2TBQX and B0H9F7BLX3. Three others, B0H3B89V1W, B0H799CTGT and B0HF7B7H7N, do not name a refrigerant. That absence is not evidence that they use R32. If a listing omits the gas, ask the seller for the model's UK technical sheet and refrigerant label rather than relying on a similar-looking product.

Three listings, B0H8Q2VCMK, B0HCPN1S2P and B0HCX2TBQX, also say that a qualified or F-gas fitter is required. Send the exact model's documents to a local installer, agree the scope, and only then order. The split air conditioner buying guide covers the other specification choices.

Why pre-gassed does not mean DIY

Pre-gassed generally means the equipment has an initial factory refrigerant charge. It does not mean every refrigerant connection is permanently sealed at the factory, and it does not give an unqualified buyer permission to open valves, connect pipework or commission the circuit. Even a kit with pre-flared pipe or quick connectors can involve controlled refrigerant once its separate sections are joined.

Hermetically sealed has a specific meaning in the selling guidance: permanent connections such as welding or brazing, and a tested leakage rate below 3 g per year. A bullet that says sealed, pre-filled or ready to install does not prove that. Look for an explicit designation for the complete product as you will use it.

Most wall splits arrive as separate indoor and outdoor units. Drilling, brackets and electrical work are only part of the job. The refrigerant circuit must also be connected and checked. This article does not explain flaring, brazing, pressure testing or adding refrigerant. Those are not DIY shortcuts. Mistakes can release gas, damage the compressor or leave a system that performs poorly.

If you are comparing installation routes, use our split air conditioner installation guide to plan access, drainage and positioning. Treat any seller phrase about a DIY kit as a prompt for questions, not as the final word on qualifications.

The installer check before checkout

For non-hermetically sealed F-gas equipment sold to an end user, GOV.UK's selling guidance requires the seller to obtain details showing that installation will be done by an appropriately qualified person. The named business still needs to have accepted the model, the property and the job.

Ask whether the engineer will install equipment you bought yourself, and whether they will install this exact model. Send the product page, the technical sheet and the proposed indoor and outdoor positions. A quotation that says air-con installation without naming the unit can leave room for an expensive disagreement.

One review attached to B0HCX2TBQX reported that businesses on the F-gas register would only install systems they supplied. That does not prove every engineer takes the same position. Firms may limit work to brands they supply so they control design, transport damage, warranty support and parts. Registration confirms a qualification route. It does not require a company to take your job.

Qualifications also depend on the work and charge. GOV.UK describes Category 1 and, within stated charge limits, Category 2 personnel qualifications, alongside company certification where work is carried out for someone else. Ask the business to confirm that its certification covers your installation, and keep the quotation with the product documents.

R32 flammability and room suitability

R32 is classed as A2L, which means lower flammability. R290 is classed A3 and has higher flammability. Lower is not the same as none. REFCOM's January 2025 bulletin notes that R32 and R290 are now the main refrigerants in the affected new single-split band, and that some rooms may not be suitable. The assessment depends on the equipment, charge, room and installation.

Do not turn floor area into a universal yes or no. These nine listings do not state a charge in kilograms, so a room-size formula would be misleading. Give the installer the dimensions and positions, including small rooms and spaces near ignition sources, and ask them to record whether the model is suitable. Do not loosen a connector, or extend the pipework yourself.

Wall-split and portable-split rules differ

A portable split is not automatically a pipe-fit wall split. Some products use a permanently assembled hose and ordinary user setup, without opening the refrigerant circuit. Midea's UK information for the PortaSplit does not require a technician for normal setup. It does call for a qualified installer if the product is fixed in place or the hose is extended.

The distinction follows the design, not the word portable. Check whether the sections stay permanently connected, whether any refrigerant fitting must be assembled, and whether your window or mounting plan changes the standard setup. Hose reach, outdoor placement, condensate and tenancy rules can still block a portable unit.

If moving the unit matters more than a permanent wall installation, compare a wall split with a portable split. A wall system is tidier once fitted. A connected portable split is more flexible and more constrained by the hose. Neither label removes the model's instructions.

A five-minute check before you order

1. Record the model number and confirm, on the UK technical sheet, the refrigerant, the charge and an express hermetically sealed designation. If a fact is missing, ask the seller in writing.
2. Send the documents to a local installer. Confirm they will fit this customer-supplied model, that their certification covers the work, and that the room is suitable.
3. Ask the seller what installer evidence it needs before releasing non-hermetic equipment. A basket does not settle the installation route.
4. Check the return terms before delivery. If the engineer rejects the unit, an unopened return is easier than a dispute after parts are mounted.