R32 (difluoromethane) is a mildly flammable A2L refrigerant with a GWP of 675 — about one third of the 2,088 of R410A, which it replaced across air-conditioners and heat pumps during the 2010s and 2020s. It remains widely used worldwide and permitted in many equipment categories; under the latest EU F-Gas Regulation rules, new monoblocks and air-to-water splits up to 12 kW placed on the EU market from 1 January 2027 must use refrigerants below GWP 150. Installed R32 units keep operating and can be serviced for life.
What is R32 and why did it replace R410A?
R32 is a single-component HFC — difluoromethane — that displaced the blend R410A as the industry workhorse because it does the same job with roughly a third of the climate impact and less refrigerant. Its GWP of 675 against R410A's 2,088 cut a typical system's refrigerant footprint by around two-thirds at a stroke, while its higher volumetric capacity allows charges roughly 20–30% smaller for the same output.
Being a pure fluid rather than a blend, R32 has no temperature glide and no risk of composition shift after a leak: a system can be topped up rather than fully recharged. R410A is itself half R32 by mass — the transition kept familiar chemistry while dropping the high-GWP half of the blend.
Is R32 dangerous?
R32 is classified A2L — lower toxicity, mildly flammable — a class created precisely because these fluids sit far from the A3 flammability of a refrigerant like propane. R32 needs a comparatively rich mixture with air and a strong ignition source to burn, and it burns slowly; standard design measures in the product safety standards — charge limits by room size, ventilation rules, no naked-flame service — manage the risk. Millions of R32 split air-conditioners installed across Europe and Asia since the mid-2010s form the field record.
| Criterion | R32 | R410A | R290 |
|---|---|---|---|
| GWP (AR4) | 675 | 2,088 | ~3 |
| Safety class | A2L (mildly flammable) | A1 (non-flammable) | A3 (flammable) |
| Type | Pure HFC | HFC blend (50% R32) | Natural hydrocarbon |
| EU rule for new ≤12 kW monoblocks from 2027 | Above GWP 150 limit | Above GWP 150 limit | Meets limit |
| HFC quota exposure | Yes | Yes | None |
Where does R32 still make sense in 2026?
R32 remains a rational, mainstream choice in most of the world's heat pump markets and, in the EU, in the equipment categories the F-Gas timeline has not changed, such as split systems above 12 kW and larger commercial equipment. Technically it performs strongly in cold-climate machines — its favourable pressure and capacity characteristics pair well with vapour-injection (EVI) compressors and sustain heating operation in deep frost. Solimpeks offers heat pumps on both R32 and R290, so each project can use the refrigerant its market rules and climate call for.
For owners of existing R32 systems there is no cliff edge. Equipment already installed may run for its full life, and with a GWP of 675 R32 sits far below the GWP 2,500 threshold of the F-Gas servicing bans that began hitting stationary refrigeration in 2025 — so servicing R32 units stays lawful. The practical pressure is price: R32 counts against an EU HFC quota cut to 42.9 Mt CO2e for 2025–2026, about 48% below the 2023 level, and each further quota step tightens supply for every HFC.
What does the EU F-Gas timeline mean for R32 heat pumps?
Under the latest F-Gas Regulation rules, GWP 150 becomes the reference limit for new small heat pumps in the EU: it applies from 1 January 2027 to new monoblock heat pumps and air-to-water splits up to 12 kW placed on the market, and from 2029 to split air-to-air units up to 12 kW, with safety-related exemptions. Larger equipment follows later, and full F-gas phase-outs are scheduled for small monoblocks in 2032 and small splits in 2035. The rules are still being implemented, so check current requirements with your installer or with us.
The volume end of the European market is therefore moving to R290 propane and other sub-150-GWP fluids, in a market that sold 2.88 million heat pumps in 2025, up 13% (EHPA). For buyers the rule of thumb is simple: an R32 unit is legal, serviceable and efficient for its whole life; for a new small unit in the EU from 2027, choose an R290 model such as Solimpeks' Varm Boost Series — and ask us which refrigerant fits your market.
Frequently asked questions
Is R32 banned in the EU?
No. R32 remains legal to operate and service, and in many equipment categories to sell. Under the latest F-Gas rules, new monoblock and air-to-water split heat pumps up to 12 kW placed on the EU market from 1 January 2027 must use refrigerants below GWP 150, subject to safety exemptions; other classes follow later. Installed R32 systems keep operating and being serviced — the rules are still being implemented, so check current requirements with your installer or with us.
Can I still get my R32 heat pump serviced after 2027?
Yes. The 2027 date restricts placing new equipment on the market, not maintaining existing units. R32's GWP of 675 is also well below the GWP 2,500 servicing bans, so refrigerant remains available — though HFC quota cuts are expected to push its price up over time.
Is R32 more efficient than R410A?
Generally yes. R32 has higher volumetric heating capacity and better heat transfer, so comparable systems achieve similar or better COP with 20-30% less refrigerant charge. That combination of efficiency and lower GWP drove the industry-wide switch.
What is the difference between A2L and A3 refrigerants?
Both are flammable classes, but A2L fluids like R32 need richer concentrations and stronger ignition sources, and burn with low flame speed. A3 fluids like R290 propane ignite far more readily, so they carry stricter charge limits and siting rules.