Best Heat Pumps UK 2026: Brand Comparison Guide
Choosing a heat pump brand can feel overwhelming. There are over a dozen manufacturers selling air source heat pumps in the UK, each with multiple product ranges, different specifications, and competing claims about efficiency and reliability. This guide cuts through the marketing and compares the major brands on the metrics that actually matter: real-world efficiency, noise levels, reliability, warranty, price, and installer availability.
Every brand covered here is available through MCS-certified installers and eligible for the Boiler Upgrade Scheme grant of up to £7,500. We focus on air source heat pumps as these represent the vast majority of UK domestic installations.
What Makes a Good Heat Pump?
Before comparing brands, it helps to understand what separates a good heat pump from an average one:
- COP and SCOP: The coefficient of performance measures how many units of heat the pump produces per unit of electricity consumed. Higher is better. Seasonal COP (SCOP) gives the average over a full heating season and is more useful than peak COP figures.
- Noise levels: Measured in decibels (dB) at one metre distance. Under 45dB is considered quiet. Under 40dB is very quiet. Noise matters for planning compliance and neighbourly relations.
- Refrigerant: R290 (propane) is the most environmentally friendly option with a global warming potential (GWP) of just 3, compared to R32 (GWP 675) and R410A (GWP 2,088). The industry is transitioning towards R290.
- Warranty: Standard warranties range from 3 to 7 years, with some brands offering up to 10 years through approved installer programmes.
- Installer network: The best heat pump in the world is worthless if there is no trained installer in your area. Brands with strong UK installer networks provide better installation quality and after-sales support.
- Price: Heat pump unit prices range from roughly £3,000 to £8,000 before installation. Total installed costs typically range from £7,000 to £15,000.
Brand-by-Brand Comparison
Daikin
Daikin is a Japanese manufacturer and one of the world's largest heating and cooling companies. Their Altherma range is one of the most commonly installed heat pump lines in the UK.
- Key range: Daikin Altherma 3 (R32 refrigerant), available in 4kW to 16kW
- SCOP: Up to 4.64 (Altherma 3, low-temperature model)
- Noise: 37 to 46dB depending on model and output
- Max flow temperature: 55°C (low-temp models), 70°C (high-temp models)
- Warranty: 5 years standard, extendable to 10 years
- Typical unit price: £3,500 to £6,500
- Strengths: Excellent COP, very quiet operation, strong installer network, proven reliability
- Weaknesses: Still uses R32 refrigerant (not yet transitioned to R290 across the full range), slightly higher price point than some competitors
Read our full Daikin heat pump review for detailed analysis.
Vaillant
Vaillant is a German manufacturer with an enormous boiler install base in the UK. Their Arotherm Plus range uses R290 (propane) refrigerant, making it one of the most environmentally forward-looking options on the market.
- Key range: Arotherm Plus (R290 refrigerant), available in 3.5kW to 15kW
- SCOP: Up to 4.65 (Arotherm Plus 5kW)
- Noise: 38 to 48dB depending on model
- Max flow temperature: 75°C
- Warranty: 5 years standard, extendable to 7 years
- Typical unit price: £4,000 to £7,000
- Strengths: R290 refrigerant (ultra-low GWP), high flow temperatures, excellent SCOP, massive UK installer network from boiler heritage
- Weaknesses: Premium pricing, R290 requires slightly larger clearance distances from the property due to flammability classification
Read our full Vaillant Arotherm review for detailed analysis.
Mitsubishi Electric (Ecodan)
Mitsubishi Electric's Ecodan range is the most installed heat pump brand in the UK. It has been available for over 15 years and has a well-established reputation for reliability and consistent performance.
- Key range: Ecodan (R32 refrigerant), available in 4kW to 14kW
- SCOP: Up to 4.30
- Noise: 42 to 49dB depending on model
- Max flow temperature: 55°C (standard models), 60°C (Ultra Quiet models)
- Warranty: 5 years standard, extendable to 7 years
- Typical unit price: £3,500 to £6,000
- Strengths: Proven track record, largest installer network in UK, extensive spares availability, MELCloud monitoring app
- Weaknesses: SCOP slightly lower than leading competitors, noise levels slightly higher than some rivals, still on R32 (R290 models expected)
Read our full Mitsubishi Ecodan review for detailed analysis.
Samsung
Samsung may be better known for electronics, but their EHS (Eco Heating System) range of heat pumps has become a serious contender in the UK market with competitive pricing and quiet operation.
- Key range: EHS Mono (R32 refrigerant), available in 5kW to 16kW
- SCOP: Up to 4.60
- Noise: 35 to 44dB depending on model — among the quietest on the market
- Max flow temperature: 65°C
- Warranty: 5 years standard
- Typical unit price: £3,000 to £5,500
- Strengths: Excellent value for money, very quiet operation, competitive SCOP, good smart home integration
- Weaknesses: Smaller UK installer network than Mitsubishi or Daikin, shorter track record in UK heat pump market
Read our full Samsung heat pump review for detailed analysis.
Bosch
Bosch (including their Worcester Bosch brand) has leveraged its strong boiler presence in the UK to build a growing heat pump business. The Compress range is well-regarded for build quality.
- Key range: Compress 7400i AW (R290 refrigerant), available in 5kW to 13kW
- SCOP: Up to 4.50
- Noise: 38 to 47dB
- Max flow temperature: 75°C
- Warranty: 5 years standard, up to 10 years through Bosch Pro network
- Typical unit price: £4,000 to £6,500
- Strengths: R290 refrigerant, high flow temperatures, strong brand reputation, excellent build quality, good UK support
- Weaknesses: Smaller dedicated heat pump installer network compared to Mitsubishi and Daikin, though growing rapidly
Nibe
Nibe is a Swedish manufacturer with decades of heat pump experience in Scandinavian climates. They are particularly strong in ground source systems but also offer a competitive air source range.
- Key range: F2120 (R407C refrigerant), available in 8kW to 20kW
- SCOP: Up to 4.20
- Noise: 40 to 50dB
- Max flow temperature: 63°C
- Warranty: 5 years standard
- Typical unit price: £4,500 to £7,500
- Strengths: Scandinavian engineering heritage, excellent cold-weather performance, advanced smart controls, strong ground source range
- Weaknesses: Higher price point, smaller UK installer network, less widely known among UK consumers
LG
LG's Therma V range has gained market share in the UK with a good balance of performance and value. Available in both monobloc and split configurations.
- Key range: Therma V R290 Monobloc, available in 5kW to 16kW
- SCOP: Up to 4.60
- Noise: 37 to 45dB
- Max flow temperature: 65°C
- Warranty: 5 years standard
- Typical unit price: £3,000 to £5,500
- Strengths: Competitive pricing, R290 option available, good SCOP, ThinQ smart home integration
- Weaknesses: Smaller UK-specific support network, less heat pump heritage than Daikin or Mitsubishi
Panasonic
Panasonic's Aquarea range is well-established in Europe and has a growing UK presence. Known for reliable performance and competitive pricing.
- Key range: Aquarea J Generation (R32 refrigerant), available in 3kW to 16kW
- SCOP: Up to 4.55
- Noise: 38 to 48dB
- Max flow temperature: 55°C (standard), 65°C (T-CAP models)
- Warranty: 5 years standard
- Typical unit price: £3,000 to £5,500
- Strengths: Good COP at low outdoor temperatures (T-CAP technology), competitive pricing, compact design
- Weaknesses: Smaller UK installer network, brand less associated with heating in UK consumer minds
Grant
Grant is an Irish manufacturer with a strong presence in the UK and Ireland, particularly for oil boiler replacements in rural areas. Their Aerona3 range is designed specifically for the UK and Irish climate.
- Key range: Aerona3 (R32 refrigerant), available in 6kW to 17kW
- SCOP: Up to 4.30
- Noise: 40 to 50dB
- Max flow temperature: 65°C
- Warranty: 5 years standard, extendable to 7 years
- Typical unit price: £3,500 to £6,000
- Strengths: Designed for UK/Ireland climate, good rural installer network (from oil boiler heritage), competitive pricing
- Weaknesses: Less well known than major international brands, smaller overall market share
Head-to-Head Comparison Summary
| Brand | Top SCOP | Lowest Noise | Refrigerant | Max Flow Temp | Starting Price |
|---|---|---|---|---|---|
| Daikin | 4.64 | 37dB | R32 | 70°C | £3,500 |
| Vaillant | 4.65 | 38dB | R290 | 75°C | £4,000 |
| Mitsubishi | 4.30 | 42dB | R32 | 60°C | £3,500 |
| Samsung | 4.60 | 35dB | R32 | 65°C | £3,000 |
| Bosch | 4.50 | 38dB | R290 | 75°C | £4,000 |
| Nibe | 4.20 | 40dB | R407C | 63°C | £4,500 |
| LG | 4.60 | 37dB | R290 | 65°C | £3,000 |
| Panasonic | 4.55 | 38dB | R32 | 65°C | £3,000 |
| Grant | 4.30 | 40dB | R32 | 65°C | £3,500 |
Which Brand Should You Choose?
The honest answer is that brand matters less than installation quality. A well-installed, correctly sized and commissioned heat pump from any of the major brands will perform well. A poorly installed premium brand will disappoint.
That said, here are some practical guidelines:
- Best all-rounder: Daikin Altherma 3 — excellent COP, quiet, proven reliability, wide installer network
- Best for environmental credentials: Vaillant Arotherm Plus — R290 refrigerant, high SCOP, high flow temperatures
- Best for proven track record: Mitsubishi Ecodan — most installed brand in UK, extensive parts and support network
- Best value for money: Samsung EHS Mono — competitive pricing with excellent noise and efficiency figures
- Best for cold climates: Nibe or Panasonic T-CAP — designed for Scandinavian/cold conditions
- Best for oil boiler replacement: Grant Aerona3 — strong rural installer network, designed for UK/Irish homes
- Best for high-temperature applications: Vaillant Arotherm Plus or Bosch Compress 7400i — both reach 75°C
The Importance of the Installer
We cannot stress this enough: the installer matters more than the brand. An experienced, MCS-certified installer who has fitted hundreds of heat pumps will deliver better results than a less experienced installer using a premium brand. When choosing an installer, ask:
- How many heat pumps have you installed in total?
- Which brands are you trained and approved for?
- Can you provide references from previous customers?
- Will you carry out a full room-by-room heat loss calculation?
- What is your approach to commissioning and post-installation support?
The brand the installer recommends may be influenced by their training and commercial relationships. This is not necessarily a bad thing — an installer who is deeply experienced with one brand will install and commission it better than a brand they rarely work with.
Frequently Asked Questions
What is the best heat pump brand in the UK?
There is no single "best" brand. Daikin, Vaillant, and Mitsubishi are the market leaders with the strongest track records. Samsung and LG offer excellent value. The best choice depends on your specific requirements — noise sensitivity, budget, environmental priorities, and which brands your local installers are trained in.
Are more expensive heat pumps better?
Not necessarily. Price differences between brands often reflect manufacturing origin, marketing costs, and supply chain factors rather than a direct quality difference. A £3,500 Samsung unit can achieve the same COP and comfort as a £6,000 premium brand if correctly sized and installed.
Does the refrigerant type matter?
Yes, increasingly so. R290 (propane) is the most environmentally friendly option with a GWP of just 3. EU regulations are phasing down high-GWP refrigerants, so R290 models are the most future-proof choice. Brands offering R290 include Vaillant, Bosch, and LG.
How long do heat pumps last regardless of brand?
Most air source heat pumps are designed to last 15 to 20 years with proper maintenance. Annual servicing is the biggest factor in longevity, regardless of which brand you choose.
Should I choose the brand my installer recommends?
Generally, yes. An installer who is fully trained and experienced with a particular brand will install and commission it to a higher standard. If you have a strong preference for a different brand, find an installer who specialises in that brand rather than asking your existing installer to fit something they are less familiar with.
Can I mix brands — different outdoor and indoor units?
No. Heat pump outdoor units and indoor components (controllers, cylinders, etc.) must be from the same manufacturer or explicitly compatible. Mixing brands voids warranties and can cause serious performance and reliability issues.