Which NIBE heat pump suits your home, how efficient and how loud the S2125 and S2060 are on their published figures, what NIBE's maximum flow temperatures mean, how the Boiler Upgrade Scheme applies and what the 5- and 7-year warranties ask of you.
Sweden
Founded 1952
A NIBE heat pump for a UK house is usually an S2125 or an S2060: monobloc air source heat pumps with propane (R290) as the refrigerant, every size listed in the MCS product directory. The S2060-10 has an MCS SCOP of 4.99 at a 35 °C flow temperature and 3.94 at 55 °C; the quieter S2125-12 has 4.80 and 3.71. Both come with a 24-month parts and labour warranty as standard, 5 years when a NIBE Pro installer registers the job and 7 years when a NIBE Pro Partner or Pro Exclusive installer does.
NIBE is a Swedish manufacturer; its UK company, NIBE Energy Systems Ltd, is in Chesterfield. You buy a NIBE through an installer, and the longer warranty depends on that installer belonging to NIBE's Pro network. The brand suits you if your radiators need a flow temperature of about 55 °C, or if the outdoor unit has to sit fairly close to a neighbour's window.
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Sorted by overall score, highest first.
How to read the ranking Scores out of 5. Quality: efficiency at 55 °C, outdoor sound power and maximum flow temperature of the model listed in our heat pump comparison. Warranty: 3.5 is the usual two-year manufacturer warranty; longer cover at no extra charge scores more, unclear terms or no cover at no extra charge score less. Price: our editorial price tier for the brand in the UK (5 = most affordable), an estimate rather than a price list. Overall: quality 50%, warranty 25%, price 25%. The full method is on our editorial method page.
Compare the specifications and warranties of the exact model.
Heat pump · 4 Versions
| Specifications | NIBE S2125-8 UK 1x230V (part no. 064 220) | NIBE S2125-12 UK 1x230V (part no. 064 218) | NIBE S2125-16 UK 1x230V (part no. 064 216) | NIBE S2125-16 3x400V (part no. 064 215) |
|---|---|---|---|---|
| Output and type | ||||
| Heat output at A-7/W35 | 4.72 kW | 7.23 kW | 10.31 kW | 10.31 kW |
| Rated heat output (Prated) at 55 °C | 5.3 kW | 7.6 kW | 11 kW | 11 kW |
| Maximum flow temperature | 75 °C | |||
| Power supply | 230 V ~ 50 Hz (1 x 230 V) | 230 V ~ 50 Hz (1 x 230 V) | 230 V ~ 50 Hz (1 x 230 V) | 400 V 3N ~ 50 Hz (3 x 400 V) |
| Efficiency on the EU label | ||||
| Energy class at 35 °C | A+++ | |||
| Energy class at 55 °C | A++ | A+++ | A+++ | A+++ |
| SCOP at 35 °C | 5 | 5 | 5.33 | 5.33 |
| SCOP at 55 °C | 3.7 | 3.8 | 4.08 | 4.08 |
| Seasonal efficiency ηs at 35 °C | 196 % | 195 % | 210 % | 210 % |
| Seasonal efficiency ηs at 55 °C | 146 % | 150 % | 160 % | 160 % |
| Noise | ||||
| Outdoor sound power | 49 dB(A) | 49 dB(A) | 55 dB(A) | 55 dB(A) |
| Refrigerant | ||||
| Refrigerant | R290 | |||
| Refrigerant charge | 0.8 kg | 0.8 kg | 1.15 kg | 1.15 kg |
| Dimensions and weight | ||||
| Dimensions (H × W × D) | 1,080 × 1,128 × 831 mm | 1,080 × 1,128 × 831 mm | 1,180 × 1,278 × 831 mm | 1,180 × 1,278 × 831 mm |
| Weight | 163 kg | 163 kg | 196 kg | 215 kg |
NIBE's UK air source range has three series: the S2125, the S2060 and the F2050. All three are monoblocs: the refrigerant circuit is sealed in the outdoor unit, and only heating water runs into the house.
| Series | Sizes | Heat outputOutput at −7 °C outside and a 35 °C flow (EN 14511), single-phase versions, from NIBE's UK installer manuals | Refrigerant | Max flowHighest flow temperature in continuous operation, from NIBE's UK manuals and leaflet; see the section on 75 °C below | Sound powerOutdoor unit, nominal value from NIBE's UK manuals and energy-label data | MCS listed |
|---|---|---|---|---|---|---|
| S2125 | 8, 12, 16, 20 | 4.7–12.0 kW | R290 | 75 °C in mild weather, 65 °C at −25 °C | 49–55 dB(A) | since 2021 and 2024 |
| S2060 | 6, 10 | 5.2–6.7 kW | R290 | 75 °C, 65 °C at −25 °C | 51–54 dB(A) | since April 2026 |
| F2050 | 6, 10, 12, 16 | 5.6–10.5 kW | R32 | 58–60 °C | 53–63 dB(A) | since 2022 and 2024 |
The S2125 comes in sizes 8 and 12 for a single-phase supply, and 16 and 20 for single-phase or three-phase. The number in the name is not the output: at −7 °C outside and a 35 °C flow, NIBE's UK manual gives 4.72 kW for the S2125-8, 7.23 kW for the S2125-12, 10.31 kW for the -16 and 12.03 kW for the -20. The 8 and 12 share a cabinet and a sound power of 49 dB(A); the 16 and 20 have 55 dB(A). It keeps heating down to −25 °C outside.
The S2060, MCS-listed since 21 April 2026, comes in two single-phase sizes: the S2060-6 gives 5.17 kW and the S2060-10 6.70 kW at −7 °C and a 35 °C flow. The S2060-6 has the highest MCS SCOP at 55 °C of any NIBE air source model. Its circulation pump is a separate part that can go indoors, and NIBE says it needs no glycol or antifreeze valves for frost protection. It is louder than the S2125-8 and -12: 51 dB(A) for the S2060-6 and 54 dB(A) for the S2060-10.
The F2050 uses R32 rather than propane: under the GB F-gas rules, R32 has a global warming potential of 675 and propane 3. It reaches 58 °C (sizes 6 and 10) or 60 °C (12 and 16) in continuous operation, so it has less headroom for radiators. Its MCS SCOP at 55 °C is 3.28 to 3.46, below every S2125 and S2060. If a quote offers an F2050 or an older F2040, ask for an S-series price for the same output.
NIBE gives two maximum flow temperatures, and they measure different things:
So treat 75 °C as headroom in mild weather, not as a winter design point. What counts is the flow temperature your installer designs for on the coldest days; ask the quote to state it and confirm the heat pump reaches it without the backup heater.
SCOP, the seasonal coefficient of performance, is the heat a heat pump delivers over a heating season for each unit of electricity, measured on a standard test. The MCS product directory lists it for every certified model at each flow temperature.
| Model | MCS SCOP 35 °C | MCS SCOP 55 °C | Sound power |
|---|---|---|---|
| S2125-8 | 4.80 | 3.59 | 49 dB(A) |
| S2125-12 | 4.80 | 3.71 | 49 dB(A) |
| S2125-16 | 5.17 | 3.96 | 55 dB(A) |
| S2125-20 | 5.14 | 3.96 | 55 dB(A) |
| S2060-6 | 5.26 | 4.12 | 51 dB(A) |
| S2060-10 | 4.99 | 3.94 | 54 dB(A) |
MCS SCOP
| Model | 35 °C flow | 55 °C flow |
|---|---|---|
| S2125-8 | 4.80 | 3.59 |
| S2125-12 | 4.80 | 3.71 |
| S2125-16 | 5.17 | 3.96 |
| S2125-20 | 5.14 | 3.96 |
| S2060-6 | 5.26 | 4.12 |
| S2060-10 | 4.99 | 3.94 |
The S2060 and the larger S2125 sizes score higher at 55 °C than the S2125-8 and -12, but within each model the flow temperature matters more than the size: for the S2060-10, 4.99 ÷ 3.94 = 1.27, so on the test the same heat at 55 °C takes about 27% more electricity than at 35 °C. Radiators that let the system run cooler do more for your bills than the badge on the outdoor unit.
A test SCOP is also not what a home achieves: the government-funded Electrification of Heat trial measured a median of 2.78 across 428 air source heat pumps. At about that level, our example home (a 1970s gas semi using 9,500 kWh of gas a year, 85% boiler efficiency assumed) would pay about the same for its heating units with a heat pump as with its boiler, on Ofgem price cap unit rates (GB average, direct debit, 1 October to 31 December 2026, no VAT on electricity in Great Britain until 31 March 2027) with standing charges left out; the result depends on the house, the installation and the tariff. The arithmetic is in heat pump running costs.
Sound power is a property of the unit; sound pressure is what reaches a window and falls with distance. In England and Wales, permitted development needs the MCS 020(a) calculation to show no more than 37 dB(A) at a neighbour's nearest window or door. It uses the sound power from the label, the product fiche or the MCS directory; the lower figures for NIBE's silent mode may not be used.
An example: an S2125-12 (49 dB(A)) on the ground against your house wall (two reflecting surfaces, factor 4), with nothing between it and a neighbour's bedroom window. At 2 m the MCS formula gives 49 + 10 × log(4 ÷ (4 × π × 2²)) = 49 − 11.0 = 38.0 dB(A), over the limit. At 3 m it gives 49 − 14.5 = 34.5 dB(A), within it; the limit is met from about 2.3 m. An S2060-10 at 54 dB(A) gives 39.5 dB(A) at 3 m and needs about 4 m. A solid fence or wall that blocks the view also counts in the calculation; more on placement in heat pump noise, and check with your local planning authority before you commit to a spot.
In England and Wales, the Boiler Upgrade Scheme takes £7,500 off an air source heat pump if your home qualifies; some off-gas-grid homes replacing oil or LPG may qualify for £9,000 instead, for applications properly made from 21 July 2026 to 31 March 2027. Your installer, who must be MCS-certified and in an approved consumer code such as RECC or HIES, applies to Ofgem and deducts the grant from your bill, so get the voucher before work starts. A heat pump supplied and installed in your home also carries 0% VAT until 31 March 2027, then 5%. Scotland and Northern Ireland differ: Scotland has its own grant and loan through Home Energy Scotland, and Northern Ireland has no grant open to every homeowner; the details are in heat pump grants.
NIBE's UK pages say its air source heat pumps qualify for the grant when you use a NIBE Pro installer. The scheme itself doesn't name a manufacturer's network: it asks for the installer conditions above, and the MCS design standard requires the heat pump to be listed on the MCS website. NIBE's Pro network matters for the longer warranty, not for the grant.
All S2125 and S2060 sizes are listed: the S2125-8 and -12 with certificates running to 30 December 2031, the -16 and -20 to June 2034, and both S2060 sizes to April 2036. Your existing gas, oil or LPG heating must be fully replaced rather than kept as a back-up; the rules are written about heating, so if you want to keep gas for cooking, ask your installer.
Every NIBE heat pump comes with a 24-month parts and labour warranty. Whether you get 5 or 7 years depends on who installs and registers it:
| Warranty | Length | Conditions | Cost |
|---|---|---|---|
| Standard | 24 months from installation, or 33 months from manufacture if that ends sooner | installed and commissioned by a NIBE-accredited installer; serviced every year; Benchmark commissioning and service record completed; registered within 28 days; bought and used in mainland Great Britain | included; you pay for the service |
| NIBE Pro | 5 years parts and labour | NIBE Pro installer registers it within 28 days; serviced every year; Benchmark completed; bought and used in mainland Great Britain | no fee stated |
| NIBE Pro Partner or Pro Exclusive | 7 years parts and labour | NIBE Pro Partner or Pro Exclusive installer registers it within 28 days; serviced every year; Benchmark completed; bought and used in mainland Great Britain | no fee stated |
| Registered by you | 2 years | if your installer didn't register it, you can register it yourself | included |
What the 5 or 7 years ask of you. A NIBE Pro installer (5 years) or a NIBE Pro Partner or Pro Exclusive installer (7 years) registers the heat pump within 28 days, and you then need a service every year with the Benchmark record filled in. NIBE's terms state no fee for either, so ask whether the price includes the warranty and get that in writing.
Coast and location. Within 1 km of the coast, NIBE makes a Blygold PolAl XT anti-corrosion coating on the outdoor unit a condition of the warranty. All three of NIBE's published warranty terms, 2, 5 and 7 years, cover only heat pumps bought and used in mainland Great Britain: Northern Ireland is outside them, and on an island, ask NIBE before you sign.
Exclusions and support. The terms exclude misuse, neglect, faulty installation and accidental damage. NIBE says its servicing package, FlexiServ, meets the warranty's servicing requirement; it publishes no price. NIBE's UK line is 0330 311 2201. How servicing works is in heat pump servicing and lifespan.
The S2125 and S2060 run on NIBE's S-Series controls. Your installer pairs the outdoor unit with either the VVM S320, an indoor module with a hot-water cylinder built in, or the SMO S40 control module with a separate cylinder, such as NIBE's Megacoil range from 160 to 400 litres. You control heating and hot water through the myUplink app, and silent mode can be scheduled, for example at night.
Solar panels. NIBE says the S-Series controller can work with solar panels; if you already have them, ask your installer to confirm in writing that your inverter is compatible.
Tariffs. NIBE's S2060 page describes Smart Price Adaption, which uses next-day hourly electricity prices to plan heating and hot water. Whether it can read your UK tariff is for your installer to confirm; on a time-of-use tariff you can also set heating and hot-water schedules in the app.
A semi or detached house with radiators. The S2060-10 gives 6.70 kW at −7 °C, a little under the 8 kW median size of heat pumps whose Boiler Upgrade Scheme grants were paid from July to September 2026; the heat-loss survey decides the size. An MCS SCOP of 3.94 to 4.12 at 55 °C helps where radiators keep the flow temperature up.
A smaller or well-insulated home. The S2125-8 (4.72 kW at −7 °C) and the S2060-6 (5.17 kW) cover lower heat losses; the heat-loss survey decides the size.
A tight plot. The S2125-8 and -12, at 49 dB(A), meet the 37 dB(A) test about 2.3 m from a neighbour's window in our example.
Less suited if you live in Northern Ireland or on an island, where NIBE's published warranty terms don't apply (ask NIBE), or if you can't commit to a yearly service.
How NIBE fares in our comparison. In our comparison of air source heat pumps we score the model nearest 8 kW from each brand on four published criteria: efficiency at 55 °C (40%), outdoor sound power (25%), the warranty you get at no extra charge (25%) and maximum flow temperature (10%). For NIBE that is the S2060-10: its 3.94 at 55 °C, the 7-year warranty through a NIBE Pro Partner or Pro Exclusive installer (NIBE's terms name no fee) and the 75 °C raise the score; the 54 dB(A) sound power lowers it, and scoring the 60 °C label limit instead of 75 °C would lower it further. Manufacturers and installers don't pay for placement; how we score is in our editorial method.
How to put two quotes side by side, and what consumer-code protection to ask about, is in choosing an MCS installer.
NIBE doesn't publish homeowner prices; the installer prices the whole job. Across all brands, the median installed price of an air source heat pump in England and Wales, for jobs whose Boiler Upgrade Scheme grants were paid from July to September 2026, was £12,826 before the grant, as reported by MCS installers, with VAT included. In England and Wales, if your home qualifies, the £7,500 Boiler Upgrade Scheme grant comes off that.
All four S2125 sizes are listed in the MCS product directory, which the MCS design standard requires. Whether your installation gets the grant in England and Wales depends on your home, an MCS-certified installer in an approved consumer code and Ofgem's decision, not on the brand or on NIBE's Pro network.
Both are propane monoblocs that reach 75 °C in mild weather. The S2060 is newer, comes in two sizes up to 6.70 kW at −7 °C and has a higher MCS SCOP at 55 °C (3.94 to 4.12) than the similar-output S2125-8 and -12 (3.59 and 3.71). The S2125 covers more sizes, up to 12.03 kW, and its 8 and 12 are quieter, at 49 dB(A) against 51 and 54 dB(A).
24 months of parts and labour as standard, if the heat pump is registered within 28 days, serviced every year and the Benchmark documents are completed. A NIBE Pro installer can register a 5-year parts and labour warranty, and a NIBE Pro Partner or Pro Exclusive installer a 7-year one. All three apply only to heat pumps bought and used in mainland Great Britain, and NIBE's terms state no fee for the 5 or 7 years.
The S2125-8 and -12 have a sound power of 49 dB(A) and the -16 and -20 55 dB(A). In our example, an S2125-12 against a wall meets the 37 dB(A) permitted development limit in England and Wales from about 2.3 m to a neighbour's window.
NIBE's UK installer manuals say its heat pumps are made in Sweden, where the company is based in Markaryd. Sales and support in the UK run through NIBE Energy Systems Ltd in Chesterfield.
Reading time: 14 min
Heat pump running costs in our example 1970s semi: 2,884 kWh and £759 a year at SCOP 2.8, £850 at 2.5 and £686 at 3.1 (Ofgem price cap, 1 October to 31 December 2026), against £865 for gas including a £108 standing charge that ends only if the gas supply is disconnected, as we assume.
Read moreHeat pump running costs
Reading time: 15 min
Heat pump noise explained: sound power and sound pressure, how distance, walls and fences change the level, the MCS 020(a) test for permitted development in England and Wales with a worked example on a UK datasheet, placement, what reduces noise and how to handle complaints.
Read moreHeat pump noise
Reading time: 16 min
The Boiler Upgrade Scheme in full: amounts in England and Wales, the £9,000 for oil or LPG homes to 31 March 2027, who qualifies, the six steps from quote to voucher, Scotland and Northern Ireland, loans and 0% VAT to 31 March 2027.
Read moreHeat pump grants
Reading time: 15 min
Heat pump servicing explained: the annual service checklist, owner checks for the outdoor unit, pressure and condensate, UK warranty conditions by brand, F-gas leak-check thresholds in Great Britain, faults you can check first and an efficiency example.
Read moreHeat pump maintenance
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Seven air source heat pumps around 8 kW ranked from MCS certificate data, UK warranty terms and makers' documents, with our weights, every model's values, a worked score, a noise example and a quote checklist.
Read moreBest air source heat pumps
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How to choose an MCS-certified heat pump installer: checking certification and consumer-code membership, what a complete quote and design must show, warning signs, deposit protection under RECC and HIES, and cancellation rights.
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