Navigating the Transition Era: Mobile Split AC R32 Legality in Europe

The refrigerant landscape for mobile split air conditioners is in active regulatory transition. R410A — the dominant refrigerant in portable split units for over a decade — carries a GWP (Global Warming Potential: the factor by which a refrigerant's 100-year atmospheric warming effect exceeds CO₂, which has a GWP of 1) of 2,088 and is subject to progressive restrictions under EU Regulation 517/2014, the F-Gas Regulation. R32, its primary successor across the residential split AC market, has a GWP of 675 — 68% lower — making it compliant with current regulations while delivering comparable or superior thermodynamic performance. Understanding mobile split AC R32 legality requires navigating EU-wide F-Gas rules, national flammability codes, and product safety standards that are still evolving in several member states.

What is R32 and why is it replacing R410A in mobile split ACs?

R32 (difluoromethane, CH₂F₂) is a single-component HFC refrigerant with a GWP of 675 and an ASHRAE A2L safety classification — mildly flammable at high concentrations but requiring significantly more energy to ignite than conventional fuels. It replaces R410A in mobile split AC units because its lower GWP meets EU F-Gas requirements while its thermodynamic properties support equivalent or marginally superior efficiency in similar circuit designs, with a 20–30% lower charge weight by mass for identical cooling capacity.

The reduced charge weight is significant from both cost and safety perspectives. A smaller R32 charge means lower potential release mass in a leak event, limiting the concentration achievable in a sealed room. The A2L classification distinguishes R32 clearly from propane (R290, ASHRAE A3: flammable) — R32's Lower Flammable Limit (LFL: the minimum refrigerant concentration by volume required to sustain combustion) is approximately 13.3% by volume, a concentration that is practically unachievable through normal leak scenarios in a ventilated residential space.

Is R32 legal in mobile split AC units sold across Europe?

Yes. R32 is fully legal in mobile split AC units sold throughout the EU and the UK under current regulations. EU Regulation 517/2014 restricts refrigerants with GWP above 2,500 in new equipment from 2020, and GWP above 750 in certain categories from 2025 — R32 at GWP 675 falls comfortably below the 750 threshold. Units must carry CE marking, comply with EN 378 (the European standard governing refrigeration system safety, including charge weight limits relative to room volume), and be serviced by F-Gas certified technicians for any refrigerant-circuit work.

The EU's 2025 restrictions specifically affect new stationary refrigeration equipment and large heat pumps, not residential cooling units in the 2–14 kW capacity range covered by portable and small split ACs. EU Regulation 517/2014 Annex III and the implementing regulations are explicit on the product categories subject to each GWP threshold. Buyers and importers should verify the specific product category scope rather than applying blanket GWP thresholds across all equipment types.

National nuances: Germany, France, and UK post-Brexit divergence

Germany applies F-Gas Regulation requirements directly but additionally requires installers to hold a specific national competency certificate (Sachkundenachweis) for handling A2L-classified refrigerants. France has incorporated EN 378 charge weight limits into its building code, imposing a maximum R32 charge of 1.5 kg per occupied room without supplementary mechanical ventilation — a limit comfortably above the 0.35–0.55 kg charge of most portable split units. The UK, post-Brexit, maintains retained F-Gas Regulations essentially mirroring the EU version as of 2025, but future divergence is possible; products imported from EU stock should carry UKCA marking alongside CE for UK residential use.

What are the legal charge weight limits for R32 in a typical room?

EN 378-1:2016 defines maximum permitted R32 charge per room based on room volume and ventilation classification. For a standard 20 m² bedroom at 2.5 m ceiling height (50 m³) with normal natural ventilation, the maximum permitted R32 charge is approximately 0.76 kg — well above the 0.35–0.55 kg charge of a 9,000–12,000 BTU portable split unit. Most residential portable split applications therefore comply comfortably with charge weight limits without requiring supplementary mechanical ventilation.

The charge weight is printed on the unit's data plate alongside the refrigerant type symbol and GWP value — a requirement under EU Regulation 517/2014 Article 12. Units below 0.3 kg R32 charge are classified as hermetically sealed below-threshold systems under EN 378 and face simplified compliance requirements. This threshold covers the majority of portable and small-split residential products, deliberately reducing administrative burden for equipment whose actual environmental and safety risk is minimal.

Who is legally permitted to service and re-gas an R32 mobile split AC?

Any work on the refrigerant circuit of an R32 mobile split — including recharging, refrigerant-assisted leak testing, and recovery before disposal — must be performed by a technician holding an F-Gas certificate (Category I or II under EU Regulation 2015/2066, or equivalent under UK retained regulations). Purchasing R32 refrigerant for refilling is also restricted to certificate holders. Routine maintenance that does not involve the refrigerant circuit — filter cleaning, coil brushing, electrical checks, drainage clearing — carries no certification requirement.

Category II F-Gas certification covers stationary equipment with a charge below 3 kg and is sufficient for servicing virtually all portable split AC units. Training and assessment takes one to two days and costs €150–€350 across European providers. In the UK, equivalent qualifications are administered through City & Guilds and sector bodies covering Refrigeration and Air Conditioning. An uncertified individual purchasing R32 refrigerant and recharging a system is in breach of EU Regulation 517/2014 Article 10 and equivalent UK legislation, regardless of whether the work is performed on owned property.

The DIY edge case: factory pre-charged units and the self-installation exemption

Several portable split AC manufacturers — including the Midea PortaSplit product class — design their units as factory-sealed, pre-charged systems connected via quick-connect fittings that do not release refrigerant during coupling. EU F-Gas Regulation Article 10(1) requires certification for work on the refrigerant circuit; coupling factory-sealed sections via quick-connect does not constitute work on the circuit if no refrigerant is released or handled. This legal distinction makes self-installation of factory pre-charged portable split units compliant without F-Gas certification, provided the installation strictly follows the manufacturer's documented procedure and the sealed refrigerant circuit is not opened at any point.

What does the EU F-Gas phase-down timeline mean for R32 buyers today?

R32's GWP of 675 places it firmly within the permitted range for new residential AC equipment under the EU F-Gas phase-down schedule and its anticipated revision through 2030. Buyers purchasing R32 portable split ACs in 2025 are investing in a refrigerant with confirmed regulatory approval, a fully established European service infrastructure, and a manufacturing supply chain that has largely completed its transition away from R410A.

The EU's HFC phase-down targets a 79% reduction in CO₂-equivalent HFC consumption by 2030 relative to the 2009–2012 baseline. R410A at GWP 2,088 already faces new-equipment restrictions in large heat pump applications. R32 at GWP 675 faces no imminent EU-level restrictions. R290 (GWP 3) is the long-term preferred refrigerant for future regulation, but its A3 flammability limits charge weight to 150–300 g in most inhabited-room applications, constraining it to smaller capacity units. R32 remains the practical residential mainstream: lower GWP than R410A, higher permissible charge weight than R290, and fully compliant through the foreseeable regulatory horizon.

The R32 vs R290 debate in r/hvac always comes down to charge weight. R290 is more environmentally ideal, but you cannot put enough of it in a 12,000 BTU unit to run the system at rated capacity in a large room. For anything above 9,000 BTU in a residential setting, R32 is the practical answer that also passes regulatory requirements.

What certification marks confirm a compliant R32 mobile split AC for European sale?

A legally compliant R32 mobile split AC for EU markets must carry CE marking confirming compliance with the Low Voltage Directive, EMC Directive, and EN 378 refrigerant safety requirements. An EU Energy Label must be affixed or provided at point of sale. The data plate must state refrigerant type, GWP value, and charge weight in kilograms. Units imported from non-EU suppliers for UK sale must additionally carry UKCA marking and meet the equivalent requirements under UK retained regulations.

• CE marking (EU) or UKCA marking (UK): confirms compliance with all applicable product safety directives.
• EU Energy Label (class A to G on the post-2021 scale): legally required at point of sale for all AC products.
• Data plate with refrigerant type, GWP value, and charge weight in kg: mandatory under F-Gas Regulation 517/2014 Article 12.
• EN 378 compliance statement in the technical documentation: confirms the unit meets European refrigerant safety standard requirements.
• F-Gas compliant disposal instructions in the user manual: required for all refrigerant-containing equipment sold in the EU.

Mobile split AC R32 legality is settled for buyers across Europe — R32 units are the mainstream product category for the residential market and face no near-term regulatory barriers. The compliance questions most relevant to individual purchasers concern room-specific charge weight checks for unusually small spaces, installer certification for any refrigerant circuit servicing, and UKCA marking verification for post-Brexit UK imports. Addressing these three points covers the full practical compliance obligation for the vast majority of residential installations.

The R32 portable split AC models that meet the highest European energy and safety standards — CE-marked, EN 378 compliant, class B or C on the new energy label — are precisely the units that disappear from retailer stock fastest when demand spikes.