Nibe Heat Pumps Review: S2125 & F2120 for Irish Homes
Nibe is Sweden's biggest heat pump manufacturer, and its air to water and ground source units are engineered for climates far harsher than Ireland's. The S2125 is the flagship: an R-290 monobloc that ranks #4 on our list. Here's our independent review: the specs that matter, typical prices, SEAI grant eligibility, and how it compares to Vaillant's aroTHERM plus, its closest premium rival.
Quick Answer
Nibe heat pumps are a premium Swedish option for Irish homes. The flagship S2125 is an air to water monobloc with a published SCOP of up to 4.8, R-290 propane refrigerant, and flow temperatures of 75°C, joint-highest on our list, matched by the Vaillant aroTHERM plus and Mitsubishi's Ecodan R290. Expect €12,500–€16,500 installed before the SEAI grant of up to €12,500. Nibe models are on the SEAI approved product list, so the grant applies in full. Nibe also makes ground source units (S1155/S1255), and its inverter-driven S-series with the myUplink app is a favourite for new builds and smart-home setups. The trade-off: Nibe sells through a partner network in Ireland, so the installer pool is smaller than Daikin's or Mitsubishi's.
Who Are Nibe?
Nibe was founded in 1952 in Markaryd, Sweden, where its heat pumps are still developed and built. In Scandinavia, where winters routinely hit -20°C and most homes already run on heat pumps, Nibe is the market leader. That heritage shows in the engineering: units rated to keep heating at -25°C outdoor temperatures are comfortably over-specified for an Irish January.
In Ireland, Nibe is sold through a partner network of trained installers and distributors rather than direct. That model has an upside (the installers who fit Nibe tend to know the brand deeply and often handle commissioning and aftercare themselves), but it also means a smaller installer pool than Daikin or Mitsubishi, and pricing that varies more between quotes. The S-series (S2125 air to water, S1155/S1255 ground source) is the current generation, with the long-running F2120 air to water unit still sold alongside it.
1952
Founded (Sweden)
4.8
SCOP (S2125)
75°C
Max flow temperature
R-290
Natural refrigerant
Nibe S2125 Specifications
The S2125 is the unit Irish partners quote first: an inverter controlled air to water monobloc available in two sizes (S2125-8 and S2125-12). Its inverter compressor modulates output smoothly at part load (the state most Irish heat pumps live in for most of the year), which is where the real-world running cost savings come from. It pairs with an indoor unit and cylinder, all controlled through the myUplink app.
| Specification | Nibe S2125 |
|---|---|
| Type | Air to water, monobloc |
| Sizes | S2125-8 and S2125-12 |
| SCOP | Up to 4.8 |
| Max flow temperature | 75°C (65°C even at -25°C outdoors) |
| Operating range | Down to -25°C outdoor temperature |
| Refrigerant | R-290 (propane, ultra-low GWP) |
| Smart control | myUplink app, wifi built in |
| SEAI approved product list | Yes, grant eligible |
| Warranty | 6 years (extendable with annual service) |
Source: Nibe S2125 product documentation. Confirm the exact model, size, and warranty terms on your quote. Warranty extension typically depends on an annual service being carried out.
Why part-load modulation matters
A heat pump rarely runs flat out in Ireland: the average winter day is 5–10°C, not -10°C. The S2125's inverter compressor ramps down smoothly to match small heat demands instead of cycling on and off, which keeps efficiency high, wear low, and the unit quiet exactly when it's working hardest for its money.
Why R-290 and 75°C matter
R-290 (propane) is a natural refrigerant with a fraction of the global warming potential of older synthetic blends, and it enables boiler-like flow temperatures. At up to 75°C, the S2125 has the joint-highest flow temperature on our list (matched by the Vaillant aroTHERM plus and Mitsubishi's Ecodan R290), enough for most retrofits to keep their existing radiators, cutting thousands off the job.
Nibe Heat Pump Price List (Typical Irish Quotes)
Nibe doesn't publish an Irish retail price list: because it sells through a partner network, every price is a quoted, installed price. The figures below are typical quote ranges we see for fully installed systems, before the SEAI grant. Treat them as a sanity check for your own quotes, not a menu.
| System | Typical home | Typical installed price (before grant) |
|---|---|---|
| S2125-8 air to water | 2–3 bed, well insulated | €12,500–€14,500 |
| S2125-12 air to water | 4+ bed or larger retrofit | €14,000–€16,500 |
| S1155/S1255 ground source | New build or rural site with land | Typically €20,000+ including collector work |
Installed prices vary with cylinder work, radiator changes, and (for ground source) collector or borehole costs. Ground source quotes are dominated by the groundworks, not the unit. Always get at least three quotes.
Nibe Heat Pump Cost in Ireland After the Grant
Expect €12,500–€16,500 fully installed for an S2125 air to water system, depending on house size, cylinder work, and whether any radiators change. That puts Nibe at the premium end alongside Viessmann and Vaillant, though the 75°C flow temperature can claw money back on retrofits by avoiding radiator upgrades.
Nibe models are on the SEAI approved product list, so the full grant of up to €12,500 (from 3 February 2026: €6,500 for the heat pump, €2,000 heating system upgrade, and €4,000 renewable heat bonus) applies when an SEAI-registered installer fits it in a home built before 2021. For the full line-by-line breakdown of what you'd pay, see our heat pump installation cost guide, or check the SEAI grants guide for eligibility.
Nibe Ground Source Heat Pumps: S1155 & S1255
Unlike most brands on our list, Nibe is as serious about ground source as air source, a legacy of the Swedish market, where boreholes are the norm. The current models are the S1155 (pairs with a separate hot water cylinder) and S1255 (integrated cylinder in one floorstanding tower), both inverter controlled so they modulate to the house's demand rather than cycling.
Ground source suits new builds and rural sites with land for a horizontal collector, or budget for a borehole. Efficiency is higher and steadier than air source because the ground stays at a near-constant temperature year round, but the groundworks push installed costs well past air to water, typically €20,000 and up. There is no public Irish price list; every ground source job is priced on the site survey. Nibe ground source models also qualify for the SEAI heat pump grant.
Nibe S2125 vs Vaillant aroTHERM plus: Which Is Better for Ireland?
These are the two premium R-290 monoblocs Irish installers quote against each other. On paper there's little between them:
| Feature | Nibe S2125 | Vaillant aroTHERM plus |
|---|---|---|
| SCOP | Up to 4.8 | Up to 4.7 |
| Max flow temperature | 75°C | 75°C |
| Refrigerant | R-290 | R-290 |
| Installed cost | €12,500–€16,500 | €12,000–€15,500 |
| SEAI grant | Up to €12,500 | Up to €12,500 |
| Noise | Quiet at part load | Quietest in class |
| Warranty | 6 years (extendable with annual service) | 5 years (7 with Advance pack) |
| Ground source option | Yes (S1155/S1255) | Air to water focus |
Verdict: the S2125 edges the SCOP and carries a longer standard warranty, plus Nibe is the pick if ground source is on the table at all. The aroTHERM plus is slightly cheaper, has the stronger quiet-running reputation, and Vaillant's boiler heritage means more Irish installers already know the brand. Whichever partner or installer near you has real experience with the unit should weigh heavily. Get both quoted if you can.
Nibe Heat Pumps: Frequently Asked Questions
Are Nibe heat pumps any good?
Yes. The S2125 has a published SCOP of up to 4.8, uses R-290 natural refrigerant, and reaches 75°C flow temperatures (joint-highest on our list, matched by the Vaillant aroTHERM plus and Mitsubishi's Ecodan R290) while operating down to -25°C outdoors. Built in Sweden for far harsher winters than Ireland's, it's over-specified for Irish conditions. The main caveats are premium pricing and a smaller Irish installer pool, because Nibe sells through a partner network.
How much does a Nibe heat pump cost in Ireland?
Expect €12,500–€16,500 fully installed for an S2125 air to water system before the grant: roughly €12,500–€14,500 for the S2125-8 in a typical 2–3 bed home, and €14,000–€16,500 for the S2125-12 in larger houses. Ground source (S1155/S1255) typically starts around €20,000 installed because of the collector or borehole work. The SEAI grant of up to €12,500 applies to qualifying homes.
Is there a Nibe heat pump price list for Ireland?
No public one. Nibe sells through a partner network in Ireland, so prices are always quoted as installed systems rather than listed unit prices. Typical installed quotes run €12,500–€16,500 for the S2125 air to water range and upwards of €20,000 for ground source. Get at least three quotes and compare them against these ranges.
Is the Nibe S2125 eligible for the SEAI grant?
Yes. Nibe models are on the SEAI approved product list. From 3 February 2026 the grant is worth up to €12,500 (€6,500 heat pump + €2,000 heating system upgrade + €4,000 renewable heat bonus), as long as the installer is SEAI-registered and your home was built before 2021.
Nibe or Vaillant: which should I choose?
They're closely matched premium R-290 monoblocs. The Nibe S2125 edges the SCOP (4.8 vs 4.7), carries a 6-year warranty extendable with annual servicing, and Nibe also offers ground source. The Vaillant aroTHERM plus is slightly cheaper and has the quietest-in-class reputation. Installer experience with the specific unit should decide it. Get both quoted.
Does Nibe make ground source heat pumps?
Yes, it's one of Europe's biggest ground source manufacturers. The current models are the S1155 (separate cylinder) and S1255 (integrated cylinder), both inverter controlled. Ground source suits new builds and rural sites with land; installed costs typically start around €20,000 because the collector or borehole dominates the price. Nibe ground source models also qualify for the SEAI grant.
Related Guides
Heat Pump Cost
Full price breakdown: €9,000–€14,000 installed, net cost after the €12,500 grant.
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Air source & ground source heat pumps: costs, SEAI grants up to €12,500.
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Home Energy Grants Guide
All SEAI home energy grants: eligibility, amounts, and step-by-step application.
Sources
- Nibe: S2125 air/water heat pump product range, nibe.eu
- SEAI: Heat Pump Systems Grant, seai.ie
- SEAI: Approved Product Lists, seai.ie
Last updated: August 2026
Fact-checked by John Rooney, Solar Energy Editor. Editorial policy
John Rooney is the founder of Solar Info and has been covering the Irish solar energy market since 2023. He fact-checks all content against official SEAI data and maintains relationships with SEAI-registered installers across Ireland.
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