The best heat pump UK homeowners can buy in 2026 offers low running costs, high seasonal efficiency, and compatibility with the Boiler Upgrade Scheme grant worth £7,500. Whether you're replacing an ageing gas boiler or building a new home, an air source heat pump can cut your carbon footprint and, in many cases, your energy bills. This guide covers the six best heat pumps available to UK buyers, what to look for before you commit, and how to claim your government grant.
Our Top Heat Pump Picks at a Glance
| Heat Pump | Output Range | SCOP (A7/W35) | ErP Rating | Best For |
|---|---|---|---|---|
| Vaillant aroTHERM plus | 5–17 kW | Up to 5.0 | A+++ | Best overall |
| Mitsubishi Ecodan | 4–21 kW | Up to 4.5 | A+++ | Best low-temperature performance |
| Daikin Altherma 3 | 4–16 kW | Up to 4.83 | A+++ | Best smart controls |
| Samsung EHS Gen 6 | 5–16 kW | Up to 4.62 | A+++ | Best MonoBloc design |
| LG ThermaV | 5–16 kW | Up to 4.62 | A++ | Best value |
| Worcester Bosch HeatPump | 5–17 kW | Up to 4.2 | A++ | Best for familiar installer network |
All six models are MCS-certified and eligible for the Boiler Upgrade Scheme grant. They support R32 refrigerant (lower global warming potential) and work with both radiator and underfloor heating systems.
Vaillant aroTHERM plus — Best Overall
Output: 5–17 kW | SCOP: up to 5.0 | ErP: A+++
The Vaillant aroTHERM plus is consistently the heat pump recommended by the most UK installers, and for good reason. This German-engineered unit achieves a SCOP (Seasonal Coefficient of Performance) of up to 5.0, meaning it delivers 5 kWh of heat for every 1 kWh of electricity consumed under standard European test conditions. That is outstanding efficiency for the UK climate.
The aroTHERM plus operates quietly — as low as 47 dB(A) on some models — and pairs excellently with underfloor heating due to its ability to produce flow temperatures as low as 25°C. It integrates with Vaillant's sensoNET system for remote monitoring and is compatible with most smart thermostats. The five-year standard warranty (extendable to seven years with registration) gives peace of mind, and Vaillant's UK installer network is extensive.
If you're pairing your heat pump with underfloor heating, the aroTHERM plus is the top choice for low-temperature compatibility.
Mitsubishi Ecodan — Best Low-Temperature Performance
Output: 4–21 kW | SCOP: up to 4.5 | ErP: A+++
The Mitsubishi Ecodan is built on decades of Japanese heat pump engineering and offers one of the broadest output ranges available in the UK — from 4 kW for a smaller semi-detached home up to 21 kW for larger properties. Its headline feature is cold-weather performance: the Ecodan continues operating down to an outside air temperature of -28°C, well beyond what UK winters will ever throw at it.
Using R32 refrigerant (which has a global warming potential roughly 70% lower than older R410A), the Ecodan meets current environmental standards. Several models carry the Quiet Mark accreditation, making them suitable for gardens close to neighbours or in areas with noise restrictions. Mitsubishi's UK installer network is well-established, and parts availability is strong — an important consideration for long-term ownership.
Daikin Altherma 3 — Best Smart Controls
Output: 4–16 kW | SCOP: up to 4.83 | ErP: A+++
Daikin is a global leader in heat pump technology, and the Altherma 3 is its flagship residential unit for the UK market. Available in monobloc and split configurations, and in a wide range of output sizes from 4 kW to 16 kW, the Altherma 3 suits most UK home sizes. SCOP figures reach up to 4.83 in some configurations, placing it among the most efficient models on this list.
Where the Altherma 3 stands out is smart control. Daikin's dedicated app gives full remote control over schedules, set temperatures, and real-time energy monitoring. The unit integrates with a wide range of smart thermostats and is compatible with home automation systems. For anyone interested in pairing their heat pump with a smart thermostat, our heat pump smart thermostat guide covers the best compatible options.
Samsung EHS Gen 6 — Best MonoBloc Design
Output: 5–16 kW | SCOP: up to 4.62 | ErP: A+++
The Samsung EHS (EHS Gen 6) takes a MonoBloc approach — all the refrigerant components are housed in the outdoor unit, so no refrigerant pipework runs inside your home. This makes installation simpler and cheaper, as the work is entirely external and typically doesn't require a Gas Safe or F-Gas engineer for the indoor portion. The trade-off is that the outdoor unit is larger, but for most UK gardens this is not a problem.
Samsung's SmartThings integration is a genuine differentiator: the EHS connects natively to the SmartThings app and platform, allowing voice control via Bixby or integration with Samsung smart home devices. For Samsung-ecosystem households, this is the most seamless heat pump experience available.
LG ThermaV — Best Value
Output: 5–16 kW | SCOP: up to 4.62 | ErP: A++
The LG ThermaV offers competitive specifications at a price point that typically undercuts Daikin and Vaillant by a meaningful margin. Using R32 refrigerant across its 5–16 kW range, the ThermaV achieves SCOP figures comparable to much pricier rivals. LG has significantly expanded its UK installer network in recent years, making it easier to find a qualified MCS installer.
The ThermaV is a sensible choice for budget-conscious buyers who want modern efficiency without paying a premium for brand cachet. ErP A++ is still excellent — it's only the A+++ models that exceed it — and for many UK homes it will perform identically in practice. If you're assessing whether a heat pump makes financial sense for your situation, read our guide on whether smart heating is worth it.
Worcester Bosch HeatPump — Best for Familiar Installer Networks
Output: 5–17 kW | SCOP: up to 4.2 | ErP: A++
Worcester Bosch is the UK's most recognised heating brand, and its heat pump range brings that brand trust to a new technology. For homeowners who want to deal with an installer they already know — perhaps the same engineer who serviced their old Worcester gas boiler — the Worcester Bosch HeatPump makes the transition easier. Trained Worcester Bosch installers are available across the UK, and the company's after-sales support is well regarded.
SCOP of up to 4.2 is slightly below the market leaders, but still well above the minimum 3.5 threshold you should target for the UK climate. The 5–17 kW output range covers most UK detached homes, and the product comes with a strong five-year warranty.
What to Look for When Choosing a Heat Pump
Output size (kW)
A heat pump must be sized correctly for your home. Too small and it won't keep up on cold days; too large and it short-cycles, reducing efficiency. A qualified MCS installer will perform a heat loss calculation to determine the correct kW output. As a rough guide, a well-insulated 3-bedroom semi-detached home typically needs 5–8 kW.
SCOP rating
SCOP (Seasonal Coefficient of Performance) measures real-world seasonal efficiency, not just peak performance. In the UK climate, aim for a SCOP of at least 3.5 — this means you get 3.5 units of heat for every unit of electricity. The best models on this list reach 4.5–5.0, which translates to meaningfully lower running costs. You can find SCOP data on manufacturer spec sheets and on the Energy Saving Trust website.
Noise level (dB)
Heat pumps produce a continuous low-level sound when running. Most modern units fall between 42–55 dB(A) at one metre — roughly equivalent to a quiet conversation. Check your permitted development rights and any local noise restrictions before installation; some councils apply restrictions on units near boundaries.
Monobloc vs split system
A monobloc system houses all refrigerant components in the outdoor unit, with only water pipes running inside. This is simpler to install and cheaper to maintain. A split system has separate indoor and outdoor units connected by refrigerant pipework; this can be slightly more efficient but requires an F-Gas certified engineer for installation and any future maintenance.
Warranty and installer availability
A heat pump is a significant investment — typical installed costs range from £8,000 to £15,000 before the BUS grant. Choose a brand with a minimum five-year warranty and check that MCS-certified installers are available in your area at MCS Registered. For a full breakdown of what installation involves, see our heat pump installation cost UK guide.
Don't Forget the Boiler Upgrade Scheme
The UK government's Boiler Upgrade Scheme (BUS) provides a £7,500 grant towards the cost of a new air source heat pump. The grant is paid directly to your MCS-certified installer, who deducts it from your final bill — you never handle the money directly. To be eligible, your home must have a valid EPC (Energy Performance Certificate) and must not have any outstanding cavity wall or loft insulation recommendations that could be done for under £1,500.
Applications are made by your installer via the Ofgem portal. Make sure any installer you approach is both MCS-certified and registered with the scheme. More detail is available on the gov.uk Boiler Upgrade Scheme page. All six heat pumps listed in this guide qualify for the BUS grant.
Our Verdict
For the best heat pump UK homeowners can install in 2026, the Vaillant aroTHERM plus is our top pick — it combines market-leading SCOP efficiency, a broad kW range, whisper-quiet operation, and the widest installer network in the country. If you prioritise smart home integration, the Daikin Altherma 3 is the stronger choice, while the Samsung EHS Gen 6 is ideal for anyone who wants the simplest possible installation via its MonoBloc design.
Whatever you choose, pair it with the right smart thermostat for maximum savings — our best smart thermostat UK guide covers the top compatible options for heat pump households.
Related: heat pump installation costs UK, heat pump vs gas boiler UK, and best smart thermostats UK.
