Stiebel heat pump review 2026: Pricing, Pros & Cons
This Stiebel heat pump review explains what Stiebel Eltron heat pumps cost, how efficient they are, which homes they suit and whether the premium price is worth paying. Along the way, we compare Stiebel with brands like Viessmann, NIBE, Vaillant, Mitsubishi and Daikin.
We are EE Renewables Ltd, and air source heat pump installation is all we do. We fit heat pumps for homeowners and landlords across Greater London, Brighton, Oxford, Southampton, Bristol, Cardiff and the wider South of England and South Wales, so this review is based on real homes rather than sales literature.
Stiebel heat pump review: At a Glance
Stiebel Eltron heat pumps are premium German units known for quality, quiet running and strong performance at higher temperatures, but they cost noticeably more than most rivals. Here is everything you need to know at a glance.
| What you need to know | Stiebel Eltron air source heat pump |
|---|---|
| Manufacturer | Stiebel Eltron, family owned, headquartered in Holzminden, Germany, founded in 1924 |
| Range | WPL series air source heat pumps, including newer R290 models |
| Sizes | Roughly 5kW to 25kW |
| Refrigerant | R290 on the newest models; R410A or R454C on some older or existing models |
| Maximum flow temperature | Up to around 65°C to 75°C depending on model |
| Efficiency (SCOP) | Around 4.2 to 5.0 at 35°C flow; ErP rating A+++ at low temperature |
| Typical real world efficiency | Around 320% to 420% (3.2 to 4.2 units of heat per unit of electricity) |
| Unit price (supply only) | Roughly £6,000 to £11,000 depending on size |
| Typical installed cost before grant | Around £13,000 to £20,000 |
| Typical cost after £7,500 Boiler Upgrade Scheme grant | Around £5,500 to £12,500 |
| Typical annual running cost | Around £750 to £1,000 for an average 3 bed home |
| Warranty | Standard cover extendable through approved installers and service plans; check terms on your quote |
| Trustpilot rating (Stiebel Eltron UK) | Limited number of UK reviews |
| Which? rating | No full Which? brand score for Stiebel Eltron heat pumps |
| Noise | Very quiet; roughly 50 to 60 dB(A) sound power on newer models |
| Maintenance | One professional service a year recommended |
| Controls | Internet Service Gateway (ISG) and MyStiebel app with weather compensation |
| Best for | Larger homes, period properties, quality focused homeowners, low noise sites |
| Less ideal for | Tight budgets and small, simple rental homes |
On price, Stiebel sits at the premium end with Viessmann and NIBE, well above mid range brands like Ideal, Grant and Baxi and far above budget names like Midea and Hisense.
Are Stiebel heat pumps worth it?
Stiebel heat pumps are worth it for homeowners who value build quality, quiet operation and strong performance in larger or older homes, and who are happy to pay more upfront. For simple, well insulated homes on a tight budget, a mid range brand will usually give better value.
Stiebel’s newest air source heat pumps use natural R290 refrigerant and can reach high flow temperatures, making them well suited to homes that want to keep existing radiators. This puts them in direct competition with the Vaillant aroTHERM plus, Viessmann Vitocal 250 A and NIBE S2125.
EE Renewables Ltd only provides air source heat pump installation, and we cover Southern England, Greater London, South West England and South Wales, including London, Brighton, Oxford, Southampton, Bristol and Cardiff. If you would like to know whether a Stiebel heat pump is worth it for your home, get in touch today for a heat pump quote tailored to your location.
Pros & Cons of Stiebel heat pumps
| Pros | Cons |
|---|---|
| Premium German engineering and build quality | One of the most expensive brands on the UK market |
| Over 50 years of heat pump experience | Smaller UK installer network than Vaillant or Mitsubishi |
| Strong performance at high flow temperatures on R290 models | Fewer UK homeowner reviews to compare |
| Very quiet newer models | Parts and specialist engineers less widespread than mainstream brands |
| Wide size range, including larger outputs for big homes | Controls and app less consumer friendly than Octopus Cosy 6 or Aira |
| Natural R290 refrigerant on the latest range | Warranty terms vary by installer and service plan |
| Family owned company with long term focus | Higher cost may not pay back in small, simple homes |
Is a Stiebel Heat Pump Right For Your Property?
Choose Stiebel if…
- You own a larger home or period property, such as a Victorian villa in Clifton, a Georgian townhouse in Bath or a detached house in Surrey.
- You want to keep as many existing radiators as possible.
- Low noise is a priority, for example in close knit London streets.
- You value long term quality and are willing to pay more upfront.
- You have an installer with proven Stiebel experience nearby.
Do Not Choose Stiebel If…
- You are on a tight budget, where Ideal, Grant or Baxi offer better value.
- You have a small, well insulated home that does not need high temperature performance.
- You are a landlord looking for the lowest cost way to improve EPC ratings.
- You want a slick smartphone experience and tariff bundle like Octopus or Aira.
- There is no Stiebel experienced installer in your area.
How efficient are Stiebel heat pumps?
Stiebel heat pumps are among the most efficient on the UK market, with seasonal efficiency (SCOP) figures of around 4.2 to 5.0 at a 35°C flow temperature. That means a Stiebel Eltron unit can deliver roughly 4 to 5 units of heat for every unit of electricity it uses, compared with around 90% efficiency for a modern gas boiler.
SCOP and SPF in plain English
SCOP, or seasonal coefficient of performance, is the average efficiency measured in testing over a heating season. SPF, or seasonal performance factor, is what your heat pump actually achieves in your home. Your MCS installer estimates SPF during the design, and this is the figure that drives your bills.
How flow temperature affects a Stiebel heat pump
The hotter the water a heat pump sends to your radiators, the harder it works. Stiebel’s R290 models hold their efficiency well at higher temperatures, which is one of their biggest strengths. Here is a rough guide:
| Flow temperature | Typical efficiency (approx.) | What it means for you |
|---|---|---|
| 35°C (underfloor heating, large radiators) | 420% to 500% | Lowest running costs |
| 45°C (some upgraded radiators) | 350% to 400% | Excellent for most homes |
| 55°C (mostly original radiators) | 290% to 330% | Still good, even in older homes |
| 65°C to 75°C (hot water boosts, very cold days) | 220% to 270% | Useful when needed |
Well designed Stiebel systems in Southern England homes typically run at 45°C to 50°C and achieve real world efficiency of around 340% to 400%.
How Stiebel compares on efficiency
Stiebel is in the top tier alongside the Vaillant aroTHERM plus, Viessmann Vitocal 250 A and NIBE S2125. It generally outperforms budget brands such as Midea, Gree and Haier, especially at higher flow temperatures. Mitsubishi Ecodan R290 and Daikin Altherma 3 H HT are also strong high temperature performers and often cost a little less.
How the mild Southern climate helps
Yes, the milder climate in Southern England and South Wales helps every heat pump. Winter temperatures in places like Brighton, Southampton and Cardiff often average around 5°C to 8°C. Combined with Stiebel’s strong efficiency, this can mean very low running costs across the year.
How much does a Stiebel heat pump cost?
A Stiebel heat pump costs around £13,000 to £20,000 fully installed before grants, and around £5,500 to £12,500 after the £7,500 Boiler Upgrade Scheme (BUS) grant. The unit alone typically costs £6,000 to £11,000, making Stiebel Eltron one of the most expensive brands available in the UK. The rest covers the cylinder, pipework, any radiator upgrades, controls, labour and MCS certification.
Stiebel heat pump pricing table
| Model (approx. output) | Typical home size | Unit price (supply only, approx.) | Installed cost before grant (approx.) | Installed cost after £7,500 BUS grant (approx.) |
|---|---|---|---|---|
| Stiebel WPL 5kW to 7kW | Well insulated 2 to 3 bed home | £6,000 to £7,500 | £13,000 to £15,000 | £5,500 to £7,500 |
| Stiebel WPL 8kW to 10kW | Average 3 to 4 bed house | £7,000 to £8,500 | £14,000 to £16,500 | £6,500 to £9,000 |
| Stiebel WPL 12kW to 16kW | Larger 4 bed or older period home | £8,500 to £10,000 | £15,500 to £18,500 | £8,000 to £11,000 |
| Stiebel WPL 20kW to 25kW | Large 5 bed or substantial period property | £9,500 to £11,000 | £17,000 to £20,000 | £9,500 to £12,500 |
What affects your final installation cost
- Radiator upgrades. Stiebel’s high temperature performance can mean fewer upgrades, but some larger radiators may still be needed at £300 to £600 each.
- Hot water cylinder. Stiebel cylinders are high quality but cost more, typically £1,500 to £3,000 fitted.
- Pipework. Older homes may need some pipes upgrading.
- Location. Labour in central London is usually higher than in places like Guildford, Bath or Cardiff.
- Specialist installer. Fewer installers fit Stiebel, which can affect pricing in some areas.
Grants and tax savings
The Boiler Upgrade Scheme gives homeowners and landlords in England and Wales £7,500 off an air source heat pump, paid straight to your MCS certified installer. Heat pump installations also currently benefit from 0% VAT in Great Britain until March 2027. With a premium brand, the grant covers a smaller share of the total cost, so you will usually still have a sizeable bill.
How Stiebel pricing compares with other brands
Stiebel is priced alongside Viessmann and NIBE at the top of the market. The Vaillant aroTHERM plus, Mitsubishi Ecodan and Daikin Altherma are often £1,000 to £3,000 cheaper for a similar system. Mid range brands like Ideal, Grant, Baxi and Worcester Bosch can be £3,000 to £6,000 less, while budget names like Midea, Gree and Hisense are cheaper still. Octopus Cosy 6 and Aira bundle installation into a fixed price that is usually well below Stiebel.
What are the running costs of a Stiebel heat pump?
The running costs of a Stiebel heat pump are typically around £750 to £1,000 a year for an average 3 bed home in Southern England on a standard electricity tariff. On a dedicated heat pump or time of use tariff, that can fall to around £490 to £650 a year.
A worked example for a typical 3 bed home
A typical 3 bed home needs around 12,000 kWh of heat a year for heating and hot water. Assuming electricity at around 26p per kWh (close to current Ofgem price cap levels, which change every quarter), here is what a Stiebel heat pump would cost to run:
| Real world efficiency (SPF) | Electricity used per year (approx.) | Yearly cost at 26p/kWh (approx.) | Yearly cost on a 17p/kWh heat pump tariff (approx.) |
|---|---|---|---|
| 3.4 (older radiators, higher flow temperature) | 3,530 kWh | £920 | £600 |
| 3.8 (typical well designed system) | 3,160 kWh | £820 | £540 |
| 4.2 (low flow temperature, good insulation) | 2,860 kWh | £740 | £490 |
The same home on a modern gas boiler would use around 13,300 kWh of gas, costing roughly £870 a year plus a gas standing charge of around £100 to £120. Removing your gas supply also removes that standing charge.
Efficiency savings versus the higher price
Compared with a budget brand running at an SPF of around 3.2, a Stiebel at 3.8 could save around £100 to £160 a year on a standard tariff. If the Stiebel costs £4,000 to £6,000 more upfront, the efficiency saving alone may take 25 years or more to pay back. The real value of Stiebel lies in quality, quietness and performance in harder to heat homes, not just lower bills.
Tips to lower your running costs
- Use weather compensation. It lowers water temperatures on milder days, which is most of the year in the South.
- Run it low and steady. Heat pumps work best keeping a constant temperature.
- Pick a heat pump tariff. Octopus, OVO and EDF offer cheaper rates at set times.
- Add solar PV. Solar panels can cover much of your hot water in spring and summer.
Tech led systems like the Octopus Cosy 6 and Aira lean on smart apps and tariff integration to cut bills. Stiebel relies on efficient hardware and careful setup, which can deliver some of the lowest running costs of any brand.
What warranty comes with a Stiebel heat pump?
The warranty that comes with a Stiebel heat pump is a standard manufacturer warranty that can usually be extended, often to around 5 years or more, when the system is fitted by an approved installer, registered and serviced every year. Terms vary by model and installer, so always ask for the full warranty details in writing on your quote.
How to keep your Stiebel warranty valid
- Use an MCS certified installer with Stiebel Eltron training or approval.
- Register the heat pump with Stiebel within the time limit in the warranty terms.
- Book a professional service every 12 months and keep the records.
- Use genuine Stiebel parts for any repairs.
How Stiebel’s warranty compares
| Brand | Typical maximum heat pump warranty (approx.) |
|---|---|
| Stiebel Eltron | Extended cover via approved installers; check current terms |
| Viessmann Vitocal | Up to 10 years via approved installers |
| NIBE | Up to 7 years via approved installers |
| Vaillant aroTHERM plus | Up to 10 years via approved installers |
| Mitsubishi Ecodan | Up to 7 years via accredited installers |
| Daikin Altherma | Up to 7 years via Stand By Me registration |
| Aira | 15 year package cover including installation |
For a premium brand, Stiebel’s headline UK warranty is less prominent than those offered by Vaillant and Viessmann, so it is worth checking the details carefully. Your MCS installer should also give you a separate workmanship warranty. At EE Renewables, we set out both clearly on every quote.
Which property types are Stiebel heat pumps best suited for?
Stiebel heat pumps are best suited for larger homes, period properties and higher value houses where performance, quietness and build quality matter more than the lowest price. The wide size range and strong high temperature output make Stiebel a good match for homes that would struggle with a basic budget unit.
| Property type | How well a Stiebel heat pump suits it | Things to consider |
|---|---|---|
| Large detached 4 to 5 bed home | Excellent | Larger outputs up to around 25kW cover big heat demands |
| Victorian, Edwardian or Georgian home | Excellent | High flow temperatures help keep original radiators |
| Homes in noise sensitive areas | Excellent | Very quiet newer models suit tight London and Brighton plots |
| 3 bed semi detached | Good | Works very well, but a mid range brand may be better value |
| Modern new build | Fair | Excellent performance, but the premium price is hard to justify |
| Rental property (landlords) | Fair | Higher cost makes payback slower than with mid range brands |
| Flats and listed buildings | Limited | Planning, space and noise rules can rule out outdoor units |
Period and character homes in the South
Southern England has a huge stock of older homes, from Georgian terraces in Bath and Brighton to Victorian villas in Clifton, Islington and Southsea. Many have solid walls and smaller original radiators, which need hotter water to stay comfortable. Stiebel, Viessmann and Vaillant’s R290 models handle this well, while lower temperature units from Baxi, Gree or Hisense may need more radiator changes.
A note for landlords
The government has proposed that privately rented homes in England and Wales should reach EPC band C by 2030. Stiebel can certainly help, but for most rental homes a mid range brand like Ideal, Grant or Samsung gives a faster payback. Stiebel may suit high end lets where quality and low noise are selling points.
How noisy are Stiebel heat pumps?
Stiebel heat pumps are very quiet, with sound power levels of roughly 50 to 60 dB(A) on newer models depending on size and workload. From a few metres away, many owners say they can barely hear the unit running, especially in quiet mode at night.
What the noise figures mean
The datasheet figure is sound power, the noise at the unit itself. What you and your neighbours actually hear is sound pressure, which drops quickly with distance. Under the MCS planning standard, noise at a neighbour’s nearest window must stay at or below 42 dB(A) for permitted development, about as loud as a quiet library. Quieter units like Stiebel make it much easier to meet this limit on tight plots.
Quiet mode and placement
Stiebel units include a quiet mode that limits fan and compressor speed at set times. Their low noise levels give installers more flexibility on placement, which is a real advantage in dense London boroughs, Brighton terraces and Bristol side streets where gardens are small and neighbours are close.
How Stiebel compares on noise
Stiebel sits among the quietest heat pumps available, alongside the Vaillant aroTHERM plus and Samsung EHS Mono R290. Daikin Altherma 3, Hitachi Yutaki and Viessmann Vitocal 250 A are also known for low noise. Stiebel is generally quieter than Panasonic Aquarea and LG Therma V models of a similar size, and noticeably quieter than older Dimplex and York designs.
What maintenance and servicing do Stiebel heat pumps need?
Stiebel heat pumps need one professional service a year, plus a few simple checks you can do yourself. An annual service typically costs around £150 to £250 in Southern England, slightly more than for mainstream brands because fewer engineers specialise in Stiebel.
What a yearly service includes
- Inspecting the outdoor unit’s fan, coil and electrical connections
- Checking system pressure and topping up if needed
- Cleaning the strainer and magnetic filters
- Checking frost protection settings
- Reviewing flow temperatures, weather compensation and schedules
- Testing the hot water cylinder and safety valves
- Recording the service to keep your warranty valid
Simple checks you can do yourself
- Keep leaves, snow and plants at least 30cm clear of the outdoor unit.
- Check the pressure gauge every few months.
- Make sure nothing blocks the airflow at the front of the unit.
- Watch the app or controller for any alerts.
Engineer support and parts
Stiebel has a UK operation and a network of trained installers, but it is smaller than the networks behind Vaillant, Worcester Bosch, Mitsubishi or Baxi. Parts are generally well supported, but finding a Stiebel experienced engineer outside major towns can take longer. Ask your installer about their aftercare and service arrangements before you commit.
Lifespan and long term reliability
A well maintained air source heat pump usually lasts 15 to 20 years, and premium units like Stiebel often reach the upper end of that range. Stiebel’s 50 plus years of heat pump manufacturing, similar to NIBE’s long history, gives it one of the strongest reliability reputations in Europe.
What do Stiebel heat pump ratings and reviews say?
Stiebel heat pump ratings and reviews are positive but limited in the UK. Stiebel Eltron UK has a relatively small number of Trustpilot reviews, and Which? has not published a full brand score for Stiebel heat pumps. Most feedback comes from installers and owners on specialist forums, where Stiebel is generally well regarded for quality.
Trustpilot
Stiebel Eltron UK has far fewer Trustpilot reviews than big consumer facing brands, as most sales go through specialist installers. The feedback that is available tends to follow a few themes:
- Positive: solid build quality, quiet running and reliable heating in larger homes.
- Negative: high prices and occasional waits for specialist engineer visits.
By comparison, Octopus Energy and Aira have thousands of Trustpilot reviews from direct customers, while Vaillant, Worcester Bosch and Ideal have much larger review bases built up from their boiler businesses.
Which?
Which? surveys heat pump owners and publishes satisfaction and reliability scores for brands with enough responses. Mitsubishi, Vaillant, Daikin and Samsung have featured because of their large UK installed base. Stiebel’s UK market share is small, so it has not gathered enough owner responses for a full score. Which? also stresses that installation quality has a big impact on owner satisfaction, whatever the brand.
What this means for you
With limited UK reviews, your installer’s experience with Stiebel is especially important. Ask to see past Stiebel installations, speak to previous customers and check how aftercare will be handled.
What does installing a Stiebel heat pump involve?
Installing a Stiebel heat pump usually takes 3 to 5 days once the design is agreed, and most homes do not need planning permission. Because Stiebel is often chosen for larger or older homes, the survey and design stage is especially important to get the size and radiators right.
The installation process step by step
- Home survey. An MCS certified installer measures each room, checks insulation, windows and radiators, and calculates your heat loss.
- System design and quote. You receive a quote with the recommended Stiebel model, cylinder size, any radiator upgrades and the expected efficiency.
- BUS grant application. Your installer applies for the £7,500 Boiler Upgrade Scheme grant for you.
- Installation. The old boiler is removed and the outdoor unit, cylinder, pipework and any new radiators are fitted.
- Commissioning. The system is filled, tested and set up with weather compensation and schedules.
- Handover. You get your MCS certificate, warranty registration and a walk through of the controls and app.
Planning permission in Southern England and South Wales
In England, most air source heat pumps count as permitted development. The rule that units must sit at least 1 metre from a boundary was removed in 2025, which helps homes with small gardens in London, Brighton and Bath. Units must still meet MCS noise limits, and listed buildings, flats and some conservation areas may need permission. This is worth checking for period homes, which are more likely to be listed or in a conservation area. Wales has its own permitted development rules, so homes in Cardiff, Swansea and Penarth should have this checked during the survey.
Why the installer matters as much as the brand
A premium heat pump will still disappoint if it is poorly designed or set up. Whether you choose Stiebel, NIBE, Viessmann or Panasonic, a careful heat loss survey, correct sizing and sensible flow temperatures are what keep your home warm and your bills low.
What controls and smart features do Stiebel heat pumps have?
Stiebel heat pumps come with a wall mounted controller offering weather compensation, heating and hot water schedules and a quiet mode. Adding Stiebel’s Internet Service Gateway (ISG) unlocks remote control through the MyStiebel app. The controls are powerful and detailed, though they feel more technical than the apps from newer, consumer focused brands.
Key control features
- Weather compensation. Adjusts water temperature to the outdoor weather to keep bills low.
- Scheduling. Separate programmes for heating and hot water.
- Quiet mode. Reduces noise at night or set times.
- Remote control and monitoring. The ISG and MyStiebel app let you check performance and change settings from your phone.
- Smart grid and solar integration. Many models can work with solar PV to use more of your own electricity.
- Legionella protection. Periodically heats stored water to keep it safe.
How Stiebel’s controls compare
The Octopus Cosy 6 and Aira are built around simple, polished apps with live efficiency data and tariff integration. Mitsubishi’s MELCloud and Daikin’s Onecta are also very user friendly. Stiebel’s controls are closer to Viessmann’s ViCare and NIBE’s myUplink: detailed and capable, which suits homeowners who like fine control and installers who want plenty of setup options.
Ready to get a free air source heat pump quote from EE Renewables?
Getting a free air source heat pump quote from EE Renewables is quick, simple and comes with no obligation. Our MCS certified team will survey your home, work out exactly what size heat pump you need and show you the real cost, including the £7,500 Boiler Upgrade Scheme grant.
Request your free heat pump quote today and find out how much you could save with a heat pump tailored to your home and location.
EE Renewables Ltd only provides air source heat pump installation, so it is all we focus on. We help homeowners and landlords across Southern England, Greater London, South West England and South Wales, including London, Brighton, Oxford, Southampton, Bristol and Cardiff. Whether a premium Stiebel heat pump is the right investment for your home or another brand would offer better value, we will give you honest, independent advice.
Frequently Asked Questions
Do Stiebel heat pumps work in freezing weather?
Yes, Stiebel heat pumps work in freezing weather and are designed to heat homes in outdoor temperatures as low as around minus 20°C to minus 25°C, depending on the model. They are widely used in Germany, Austria and Scandinavia, where winters are far colder than in Southern England. Short defrost cycles to clear ice from the outdoor coil are completely normal.
Is the R290 refrigerant in Stiebel heat pumps safe?
Yes, the R290 refrigerant in Stiebel heat pumps is safe when installed correctly. R290 is propane, and only a small amount is sealed inside the outdoor unit, never inside your home. Installers follow set clearance zones around the unit, so its position near doors, windows and drains is checked during the survey.
Can I keep my gas boiler alongside a Stiebel heat pump?
You can keep a gas boiler alongside a heat pump in a hybrid setup, but you would not be eligible for the £7,500 Boiler Upgrade Scheme grant. The BUS grant requires the heat pump to fully replace your fossil fuel heating. A correctly sized Stiebel heat pump is designed to heat even large homes on its own.
Does a Stiebel heat pump add value to my home?
A Stiebel heat pump can add value to your home by improving its EPC rating and lowering running costs for future buyers. Research from property and energy groups has suggested homes with better EPC ratings can sell for several percent more. A premium, well known European brand can also be a selling point in higher value homes.
How long is the wait for a Stiebel heat pump installation?
The typical wait for a Stiebel heat pump installation is around 4 to 10 weeks from survey to switch on. This allows time for detailed design, BUS grant approval and ordering the unit and cylinder, which can take a little longer for a specialist brand. The fitting itself usually takes 3 to 5 days.
