R290 Propane Heat Pumps: Why Natural Refrigerant Is the Future
If you are buying a heat pump in 2026, the refrigerant it uses may be the most important long-term decision you make. R290 (propane) is a natural refrigerant with a Global Warming Potential of just 3 — compared to 675 for R32 and 2,088 for the now-obsolete R410A. As EU and UK regulations progressively tighten restrictions on synthetic refrigerants, R290 is the most future-proof choice you can make today. It also offers slightly better efficiency at low temperatures, making it the preferred option for brands targeting the highest COP figures.
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What Is R290 and Why Does It Matter?
R290 is simply propane — the same gas used in camping stoves and BBQs. As a refrigerant, it has excellent thermodynamic properties and virtually zero environmental impact if leaked. EU F-Gas regulations are progressively banning high-GWP refrigerants, making R290 the safest long-term choice.
Which Brands Offer R290 Heat Pumps?
| Brand | R290 Models | SCOP | Installed Cost |
|---|---|---|---|
| Vaillant | Arotherm Plus (all) | Up to 4.65 | £9k–£15k |
| Nibe | F2120, F2040 | Up to 5.03 | £11k–£18k |
| Viessmann | Vitocal 250-A, 200-A | Up to 5.00 | £10k–£19k |
| Bosch | Compress 5800i, 7000i | Up to 5.00 | £10k–£16k |
| Stiebel Eltron | WPL range (all) | Up to 4.50 | £10k–£18k |
| Worcester Bosch | Greensource Aeris | Up to 4.56 | £9k–£15k |
| Panasonic | Aquarea L-Generation | Up to 4.65 | £8.5k–£14k |
| LG | Therma V R290 Monobloc | Up to 4.60 | £8k–£13.5k |
Brands still primarily using R32 include Mitsubishi, Daikin, Samsung, and Grant. All have R290 models in development.
R290 vs R32: Should You Switch?
| Factor | R290 | R32 |
|---|---|---|
| GWP | 3 | 675 |
| Future regulatory risk | None | Medium — may face restrictions |
| Efficiency at low temps | Slightly better | Good |
| Placement restrictions | 750mm from openings | Fewer restrictions |
| Availability | Growing rapidly | Widely available now |
| Typical cost premium | £0–£1,000 more | Lower cost |
If your budget and chosen brand support R290, it is the better long-term choice. If R32 is significantly cheaper for your situation, it remains a good option — R32 systems will be serviceable for their full 15–20 year lifespan. Pair either with solar panels to reduce the electricity costs.
Safety Considerations
R290 is mildly flammable (A3 classification), but the small quantities used (under 1kg in most units) and outdoor installation mean the risk is negligible. All R290 heat pumps have built-in safety features, and the refrigerant is contained entirely within the sealed outdoor unit. Your installer simply ensures 750mm clearance from building openings — rarely problematic in practice.
Frequently Asked Questions
What is R290 refrigerant?
Propane — a natural refrigerant with GWP of just 3. The most environmentally friendly option for heat pumps.
Is R290 safe?
Yes. Small quantities, sealed outdoor unit, built-in safety features. Risk is negligible for domestic installations.
Which brands use R290?
Vaillant, Nibe, Viessmann, Bosch (newer models), Stiebel Eltron, Worcester Bosch, Panasonic (L-Gen), and LG.
Should I wait for R290 or buy R32 now?
If R290 is available in your size and budget, choose it. If R32 is significantly cheaper, it is still a good choice for its full 15–20 year lifespan.
Why is R290 better than R32?
GWP of 3 vs 675, better low-temperature efficiency, no future regulatory risk.
Does R290 affect installation?
Slightly larger clearance distances from openings (750mm). Rarely problematic in practice.
R290 and the Future of UK Home Heating
R290 represents the convergence of environmental responsibility and practical heating efficiency. With the BUS grant, solar panel systems for electricity generation, and R290's excellent performance, homeowners can heat their homes with minimal environmental impact at lower cost than fossil fuels. The technology is proven, the brands are established, and the financial support is in place — the case for R290 heat pumps has never been stronger.