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Best Air Source Heat Pump Manufacturers in the UK (2025)
- Among the best heat pump brands in the UK, you'll find Daikin, Panasonic, Vaillant, and Worcester Bosch heat pumps.
- Our research is based on efficiency ratings, warranty coverage, real customer reviews, and expert recommendations.
- We highlight the top heat pump manufacturers based on different priorities to help you find the best fit for your space and budget.
Thinking about an air source heat pump for your home? There are a lot of brands to choose from, and not all of them are worth your money. Some are more efficient, some last longer, and others come with better warranties. The tricky part is knowing which one actually suits your home and budget.
That’s why we’re breaking down 12 of the best heat pump manufacturers in the UK. We’ll go over what makes them different, what to look for, and how certain features can impact your heating costs.
By the end, you’ll have a clearer idea of which heat pump manufacturer in the UK makes the most sense for you—without wasting time on ones that don’t.
| Brand | Price range | Heat pump types | Output range | Efficiency | Max CoP | Warranty | Minimum temp. |
|---|---|---|---|---|---|---|---|
| Daikin | £3,100 – £9,200 | Air to water, air to air | 4kW – 16kW | A+++/ A++ | 5.43 | 5 years | -28°C |
| Panasonic | £675 – £8,000 | Air to water, air to air | 2kW – 16kW | A+/A++/A+++ | 5.28 | 3 – 7 years | -28°C |
| Vaillant | £3,100 – £8,700 | Air to water | 3.5kW – 19kW | A+++/ A++ | 5.2 | 2 years | -25°C |
| Worcester Bosch | £3,700 – £8,900 | Air to water | 5kW – 17kW | A+++/A++ | 5.31 | 2 years | -25°C |
| NIBE | £3,800 – £10,000 | Air to water, ground source | 8kW – 20kW | A+++/ A++ | 5 | 7 years | -25°C |
| Samsung | £3,400 – £7,400 | Air to water | 9kW – 16kW | A+++/A++/A+ | 4.81 | 7 years | -25°C |
| Viessmann | £3,700 – £17,000 | Air to water, air to air, ground source | 2.3kW – 18.5kW | A+++/A++ | 5 | 3 – 5 years | -10°C |
| Hitachi | £3,000 – £8,200 | Air to water | 4.3kW – 24kW | A+++ | 5.25 | 5 years | -25°C |
| Mitsubishi | £2,600 – £5,815 | Air to water, air to air | 5kW – 14kW | A+++ | 4.9 | 3 – 5 years | -25°C |
| LG | £3,340 – £6,400 | Air to water, air to air | 5kW – 16kW | A+++/A++ | 4.50 | 7 years | -25°C |
| Calorex* | £1,500 – £10,000 | Air to water, pool heat pumps | 7kW – 36kW | A+/A++/A+++ | 18.5 | 3 – 5 years | -15°C |
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Our review process for heat pump brands in the UK
Picking the best air source heat pump manufacturers isn’t just about listing big names. We have looked at what actually matters—efficiency, reliability, and real-world performance. Here’s what shaped our selection:
- Efficiency ratings: All air source heat pump suppliers on this list offer heat pumps with an A+++ efficiency rating, the highest possible. We also checked the Coefficient of Performance (CoP)—basically, how much heat you get for every unit of electricity. The higher, the better.
- System type: Most of these brands focus on air-to-water heat pumps, ideal for heating and hot water. Some use a split system (indoor and outdoor units connected by an electrical drive), while others offer monobloc units that sit entirely outside. Then there are hybrid options, designed to work with your existing heating setup.
- Warranty and reliability: Long warranties? That is a good sign. We checked how well each heat pump supplier stands behind their heat pumps and what’s actually covered. Because a warranty that only sounds good on paper isn’t much help when something goes wrong.
- Customer feedback: Specs tell one story, but real users tell another. We have factored in homeowner reviews and expert opinions to see which brands deliver the best results in the long run.
- Air source heat pump prices: We compared price ranges across different models to find the best balance of affordability, performance, and long-term value.
At the end of the day, it’s about finding a heat pump that fits your home, budget, and heating needs—without overpaying for features you won’t use. That’s exactly why we put this list together.
Best heat pump companies
In this section, we’re reviewing the top 12 manufacturers of heat pumps in the UK—breaking down what makes each heat pump company worth considering. We’ve ordered them based on efficiency, reliability, and real customer feedback.
Daikin heat pumps
Daikin is a Japanese company specialising in heating, ventilation, and air conditioning systems. Founded in 1924, the company has built a reputation for cutting-edge heat pump technology. Today, Daikin is the world’s largest heat pump manufacturer, producing millions of units annually.
Daikin offers a range of heat pumps that combine innovative technology with sleek design. Their model range includes air to air and air to water heat pumps.
| Price range | Output range | Efficiency | Max CoP | Warranty | Minimum temp. |
|---|---|---|---|---|---|
| £3,100 – £9,200 | 4kW – 16kW | A+++/ A++ | 5.43 | 5 years | -28°C |
Daikin heat pumps receive mostly positive reviews, with users frequently praising their efficiency and energy savings.
Users mention seeing a drop in electricity bills, particularly in well-insulated homes. Others praise the even heat distribution, noting that Daikin systems maintain a steady temperature without cold spots.
Several users say that Daikin heat pumps are quiet enough to be barely noticeable, especially the newer models. Homeowners who have switched from traditional heating units mention how much more pleasant their home environment feels without the frequent noise of a boiler or fan kicking in.
However, not all feedback is positive. Concerns about continuous operation have come up in multiple discussions—some users are surprised that the system runs longer than expected, leading to fears of higher electricity costs.
- Noticeable energy savings: Many users report lower energy bills compared to traditional heating systems, but proper system sizing is crucial.
- Quiet performance: Consistently praised for low noise levels, making it one of the quieter heat pump options.
- Initial costs can be high: Daikin users note that installation is more expensive than a traditional heating system, but long-term efficiency makes up for it.
Panasonic heat pumps
Panasonic is a renowned Japanese electronics company founded in 1918. While not traditionally a heat pump specialist like Daikin, Panasonic has rapidly gained market share with its Aquarea heat pump range, which is designed to compete with premium brands like Viessmann and Mitsubishi.
Panasonic produces air to water heat pumps that have a strong reputation for efficiency and reliability, particularly in cold weather conditions. That’s why it is considered one of the best air source heat pumps in Scotland.
| Price range | Output range | Efficiency | Max CoP | Warranty | Minimum temp. |
|---|---|---|---|---|---|
| £675 – £8,000 | 2kW – 16kW | A+/A++/A+++ | 5.28 | 3 – 7 years | -28°C |
The Aquarea T-CAP range is frequently praised for maintaining full heating capacity even at -15°C, a feature that sets it apart from mid-range competitors. Many users report consistent performance and lower energy bills, particularly in well-insulated homes.
Another common point in Panasonic heat pump reviews is quiet operation. Multiple users note that they are quieter than other brands in a similar price range.
However, customer service and post-installation support are inconsistent. While some users receive quick and helpful responses, others struggle with long wait times for repairs or warranty claims.
- Performance in cold temperatures: The Aquarea range can operate effectively at low temperatures, with some models maintaining performance down to -28°C. However, maintaining full capacity at -15°C is more typical.
- Quiet operation: Panasonic heat pumps are noted for being quieter than some competitors.
- Warranty: Panasonic typically offers a warranty ranging from 3 to 7 years, depending on the installer’s qualifications and whether the commissioning sheet is uploaded.
Vaillant heat pumps
Vaillant is a German company with over 145 years of experience in heating technology. Founded in 1874, the company has played a major role in shaping modern heating systems.
Vaillant offers air source, ground source, and water source heat pumps. Ground source heat pump cost in the UK is usually higher than other types.
| Price range | Output range | Efficiency | Max CoP | Warranty | Minimum temp. |
|---|---|---|---|---|---|
| £3,100 – £8,700 | 3.5kW – 19kW | A+++/ A++ | 5.2 | 2 years | -25°C |
Vaillant heat pumps receive mostly positive reviews. Users frequently praise their quiet operation—especially the aroTHERM Plus series, which runs as low as 54 dB(A), about the same as a refrigerator.
Many homeowners also highlight the high efficiency, reporting noticeable reductions in energy bills compared to traditional boilers. Another strong point is customer service, with multiple reviews mentioning responsive after-sales support.
On the downside, Vaillant offers a shorter warranty than many competitors—just two years, while some brands provide five to seven years.
- Quiet operation: The aroTHERM Plus series is one of the quietest heat pumps on the market.
- Strong efficiency: Many users report lower energy bills, but performance depends on correct system sizing.
- Good customer service: Vaillant’s after-sales support is often praised, unlike some competitors.
Worcester Bosch heat pumps
Worcester Bosch is one of the most recognised heating brands in the UK, best known for its gas boilers and renewable heating solutions.
A key historical milestone for Worcester Bosch was being awarded a Royal Warrant in 2009, meaning the brand has supplied heating products to the Royal Household—a rare distinction that reinforces its reputation for quality.
Worcester Bosch specialises in air source heat pumps, that’s why it is one of the best options among heat pumps for flats. All Worcester Bosch heat pumps are MCS-certified, making them eligible for UK government heat pump grants like the Boiler Upgrade Scheme (BUS).
| Price range | Output range | Efficiency | Max CoP | Warranty | Minimum temp. |
|---|---|---|---|---|---|
| £3,700 – £8,900 | 5kW – 17kW | A+++ | 5.31 | 2 years | -25°C |
Worcester Bosch heat pumps receive generally positive reviews. They have an A+++ efficiency rating, with many users reporting lower energy bills after installation. Many installers find Worcester Bosch easier to fit into UK homes than brands like Viessmann or NIBE.
However, performance in extreme cold may be weaker than competitors. Brands like NIBE and Calorex are often preferred for very low temperatures, as their heat pumps maintain efficiency at lower ambient temperatures, according to reviews.
Worcester Bosch's weather performance makes it one of the best air source heat pumps for Wales.
- Reputable brand in the UK: Worcester Bosch is a well-established brand in the UK, known for its quality heating solutions, including a Royal Warrant in 2009.
- Certified product range: They specialise in air source heat pumps, which are MCS-certified, making them eligible for government incentives like the Boiler Upgrade Scheme.
- Quiet operation: Worcester Bosch heat pumps are designed to run at lower noise levels. For example, Worcester Bosch 7400 heat pump achieves a noise level of 38.5 dBA at a distance of 3 meters. This is comparable to everyday sounds like a refrigerator or a normal conversation.
NIBE heat pumps
NIBE has been in the heating business for over 70 years, starting in Sweden and expanding across Europe. What began with stoves and boilers is now a full range of energy-efficient heat pumps designed to handle cold climates.
Unlike some brands that struggle in freezing weather, NIBE builds systems that keep running even in the coldest temperatures.
NIBE offers air source heat pumps, ground source heat pumps and exhaust air heat pumps.
| Price range | Output range | Efficiency | Max CoP | Warranty | Minimum temp. |
|---|---|---|---|---|---|
| £3,800 – £10,000 | 8kW – 20kW | A+++/ A++ | 5 | 7 years | -25°C |
NIBE heat pumps have many positive reviews regarding high energy efficiency, with some users reporting up to 80% savings on electricity costs.
However, some users struggle with complex control panels. Service availability post-warranty can be inconsistent, with long wait times in some areas.
- Exceptional cold-weather performance: Unlike many heat pumps, NIBE models can operate efficiently in temperatures as low as -25°C.
- Significant energy savings: Some users report up to 80% lower energy costs compared to traditional heating systems.
- Higher upfront cost, but long-term value: NIBE heat pump installation in the UK costs above average, but the long lifespan (20+ years) and efficiency can lead to substantial long-term savings.
A well-installed heat pump can maximise savings, but choosing the right installer is key.
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Samsung heat pumps
Samsung, a South Korean multinational founded in 1938, is best known for its dominance in consumer electronics, but it has also become a major player in heating solutions.
Samsung offers air source heat pumps, known as EHS (Energy Harvesting System), which use electricity and ambient energy from the air to generate heat and produce hot water. These heat pumps are designed to provide both heating and cooling.
| Price range | Output range | Efficiency | Max CoP | Warranty | Minimum temp. |
|---|---|---|---|---|---|
| £3,400 – £7,400 | 9kW – 16kW | A+++/A++/A+ | 4.81 | 7 years | -25°C |
Samsung heat pumps get mixed reviews, with strong praise for heating performance and efficiency, but serious complaints about customer service and long-term reliability.
Users report solid heating down to -15°C, with no need for a backup system. That’s a big advantage for areas where heat pumps tend to struggle in winter. Build quality also gets positive feedback.
Now, the downsides. The maximum CoP is 4.81, which is decent but falls short of brands like Daikin or Vaillant, which exceed 5. This means Samsung heat pumps may use more energy to produce the same amount of heat.
- Strong cold-weather performance: Many users say their system keeps running down to -15°C without issues.
- Competitive efficiency but lower max CoP than premium brands: With an A+++ to A+ efficiency rating and a maximum CoP of 4.81, Samsung heat pumps are energy-efficient but slightly behind top-tier brands like Daikin or Viessmann, which offer higher CoPs.
- Lower upfront cost than premium brands: With a price range of £3,400 to £7,400, Samsung heat pumps are more affordable than high-end brands like Viessmann or Mitsubishi.
Viessmann heat pumps
Viessmann is a family-owned company founded in 1917 by Johann Viessmann in Hof, Germany. Initially specialising in steel boilers, the company has evolved over four generations into a global leader in heating solutions.
Viessmann offers a diverse range of heat pumps tailored to different needs: air to water, ground to water, and DHW (Domestic Hot Water) heat pumps.
| Price range | Output range | Efficiency | Max CoP | Warranty | Minimum temp. |
|---|---|---|---|---|---|
| £3,700 – £17,000 | 2.3kW – 18.5kW | A+++/A++ | 5 | 2 years | -10°C |
Viessmann heat pumps are widely praised for quiet operation and long-term durability. Multiple reviews highlight how Viessmann heat pumps produce minimal noise, even in outdoor units. Homeowners in residential areas find this particularly beneficial, as it avoids disturbance to neighbours.
However, there are some drawbacks. Upfront costs are high, with many users commenting that Viessmann heat pumps require a larger initial investment than some competitors.
Parts availability can also be a concern, with a few users mentioning that replacement parts for certain models are expensive or have long lead times.
- Wide price range: Costs range from £3,700 to £17,000, depending on system type and output capacity.
- Easy installation: Many homeowners and installers find Viessmann easier to install than some competing brands.
- Quiet operation: Users frequently highlight that Viessmann heat pumps run with minimal noise.
Hitachi heat pumps
Hitachi was founded in 1910 in Japan. With over a century of expertise, Hitachi has built a reputation for high-quality, durable, and energy-efficient products, including heat pumps.
Hitachi specialises in air source heat pumps, with a focus on high efficiency, low noise levels, and smart control integration.
| Price range | Output range | Efficiency | Max CoP | Warranty | Minimum temp. |
|---|---|---|---|---|---|
| £3,000 – £8,200 | 4.3kW – 24kW | A+++ | 5.25 | 5 years | -25°C |
Hitachi heat pumps use R32 refrigerant, which has a lower global warming potential than older refrigerants. This makes them a more environmentally friendly choice compared to other brands.
The Yutaki S Combi has a built-in hot water cylinder, meaning homeowners don’t need extra space for a separate tank. This is a major advantage for homes with limited room, and this benefit is often described in positive customer reviews.
While some users report early power failures, others say their Hitachi heat pump has been running perfectly for 10+ years, proving that good installation is key to longevity.
- High efficiency: A+++ efficiency rating with a maximum CoP of 5.25, making it one of the most efficient heat pumps available.
- Reliable in cold climates: Operates down to -25°C, ensuring performance in harsh winters.
- Long warranty: Comes with a 5-year warranty, offering good coverage for potential issues.
Mitsubishi heat pumps
Mitsubishi Electric has been around for a long time—founded in 1921, but with roots that stretch back even further, to the Mitsubishi Group’s beginnings in 1870 as a shipping company.
Mitsubishi Electric specialises in high-efficiency heat pump systems designed for both residential and commercial use. Their Ecodan series is one of the most well-known on the market, offering air source heat pumps, ground source heat pumps and hybrid heat pumps (these combine heat pump technology with traditional heating systems, such as gas boilers).
| Price range | Output range | Efficiency | Max CoP | Warranty | Minimum temp. |
|---|---|---|---|---|---|
| £2,600 – £5,815 | 5kW – 14kW | A+++ | 4.9 | 3–5 years | -25°C |
Mitsubishi is a well-known name in the world of heat pumps, and for good reason. Many homeowners share reviews about noticeable energy savings and near-silent operation. Mitsubishi Ecodan is known for consistent heat output at lower flow temperatures, ideal for heat pump underfloor heating.
But Mitsubishi heat pumps are not perfect. While they handle milder winters well, some users have found them less reliable in extreme cold, occasionally needing a backup heat source to keep things comfortable.
- Japanese brand with a history: With a reputation for reliability, Mitsubishi Electric is recognised worldwide.
- Great option for moderate climates: Mitsubishi heat pump Ecodan series is highly efficient but works best in milder UK temperatures (this is one of the best air source heat pumps in Northern Ireland). In extreme cold, performance can drop, and some users find they need a backup heating source.
- Mitsubishi units are among the quietest: Many homeowners praise their near-silent operation, making them a good fit for noise-sensitive areas like bedrooms and small homes.
LG heat pumps
LG, originally known as Lak Hui Chemical Industrial Corp., was founded in 1947 in South Korea. LG was one of the first companies to widely adopt R32 refrigerant, which has a lower global warming potential than older refrigerants. This helped make its heat pumps more eco-friendly.
LG’s heat pump lineup is built around its Therma V series, an air to water heat pump that provides heating, cooling, and hot water.
| Price range | Output range | Efficiency | Max CoP | Warranty | Minimum temp. |
|---|---|---|---|---|---|
| £3,340 – £6,400 | 5kW – 16kW | A+++/A++ | 4.50 | 7 years | -25°C |
One of LG’s standout features is its diagnostic interface, which many users say makes troubleshooting easier for technicians and homeowners alike. This is a significant advantage over some competitors, where diagnostics can be more complex.
Energy efficiency also gets positive feedback, with users reporting lower energy bills and stable heating performance in mild to moderately cold climates.
However, initial performance issues have been reported in reviews, with some users experiencing temperature inconsistencies, especially in auto mode. Several users note that turbo mode is sometimes required to achieve the desired heat output, which could impact efficiency if used frequently.
- Eco-friendly technology: LG air source heat pumps were among the first ones to adopt R32 refrigerant, which has a lower global warming potential.
- Energy efficiency: Users report lower energy bills and stable heating performance, especially in mild to moderately cold climates.
- Reliable and durable: Reviews praise LG heat pumps for long-term dependability, with fewer breakdowns than some users experienced with previous systems.
Calorex heat pumps
Calorex is a UK-based manufacturer specialising in heat pump technology, particularly for swimming pools, dehumidification, and industrial applications.
Unlike traditional heat pump brands such as Daikin or Mitsubishi, Calorex has focused on niche markets, making it a leader in pool heating and commercial dehumidification.
| Price range | Output range | Efficiency | Max CoP | Warranty | Minimum temp. |
|---|---|---|---|---|---|
| £1,500 – £10,000 | 7kW – 36kW | A+/A++/A+++ | 18.5 | 3 – 5 years | -15°C |
Calorex heat pumps have a strong reputation in the pool heating market, with many users praising their efficiency and reliability.
Customers frequently report that Calorex heat pumps maintain stable water temperatures even in colder conditions, which makes them a popular choice for leisure centres, hotels, and residential pools in cooler climates.
However, Calorex is not a mainstream residential heating brand, and its products are less commonly used in standard home heating applications.
- Specialised in pool heating and dehumidification: Unlike traditional heat pump brands like Daikin or Mitsubishi, Calorex focuses on niche pool heating solutions.
- Reliable performance in cold weather: Many users report that Calorex heat pumps maintain stable water temperatures even in cooler climates.
- Wide output range for different applications: With heat pumps ranging from 7kW to 36kW, Calorex offers solutions for small residential pools to large commercial installations in hotels, spas, and leisure centres.
Which heat pump brand should you get?
The best heat pump for your home depends on your energy needs, budget, and climate conditions. Some brands offer more output options, while others prioritise extreme cold performance, pricing, or warranty coverage.
Below are the key factors to consider when comparing manufacturers:
- Output & sizing: A system that’s too large wastes energy, while one that’s too small won’t heat effectively. Larger homes may need Hitachi Yutaki S (up to 24kW), while smaller, efficient homes can use Panasonic Etherea (2kW).
- Cost vs. performance: Prices vary based on efficiency and brand. Budget buyers may opt for Panasonic’s air to air models (£675), while higher power needs suit Hitachi Yutaki S (£8,000 for 24kW). Consider long-term energy savings, not just upfront costs.
- Customer support: A heat pump is a long-term investment, so reliable service matters. Worcester Bosch & Vaillant (4.6/5 Trustpilot) are praised for fast service, while Samsung & Hitachi (1.2–1.3/5) get complaints about warranty claims and customer support.
- Cold climate performance: If winters are mild, most heat pumps work. For freezing temperatures, check the minimum operating temperature. Viessmann’s Vitocal (-10°C) may struggle in extreme cold, while Daikin (-28°C) performs best.
- Warranty length: Longer warranties provide more security. Panasonic, Samsung & NIBE (7 years) offer the best standard coverage, while Viessmann, Vaillant & Worcester Bosch (2 years) often require paid extensions. Always check what’s covered (parts vs. labour).
Even the product from the best air source heat pump company can underperform if installed incorrectly. Choosing the right heat pump size is also crucial—too small, and it won’t heat your home efficiently. If it’s too large, it will waste energy and wear out faster.
A properly sized and installed system ensures optimal performance, lower running costs, and a longer lifespan.
To get the best performance from your heat pump, it’s essential to choose experienced MCS-certified heat pump installers. They understand how to match the system to your home’s insulation, heating needs, and local climate. A well-installed heat pump runs efficiently and saves you money in the long run.
Finding the right installer doesn’t have to be a hassle. You could spend hours searching through websites and reviews on your own—or you could let us do the hard work for you.
Fill out our 30-second form, and we’ll connect you with up to four trusted installers in your area. Simple, fast, and no obligation. Click below to get started!
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