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NIBE S2125 Air Source Heat Pump in Craigavon, Northern Ireland

SwedenClimate Zone 5

Looking at a NIBE S2125 air source heat pump for your Craigavon home? NIBE S2125 publishes no installed price, and no credible third-party figure exists; the UK median install is £12,908 before any support (DESNZ Boiler Upgrade Scheme median, April to June 2026). Northern Ireland currently has no Boiler Upgrade Scheme equivalent, so budget the full installed price; 0% VAT until 31 March 2027 is already reflected in quotes. Buyers who put quiet running and a long warranty first, and will use a NIBE Pro installer.

NIBE S2125 does not publish an installed price and no credible third-party figure exists, so we show none. For scale, the median Boiler Upgrade Scheme install cost £12,908 before the grant (DESNZ Boiler Upgrade Scheme median, April to June 2026). The typical pre-grant installed range for Craigavon is £8,350 - £14,350.

This is one of the UK's cooler heating climates, so specification matters more here. Modern units hold useful output well below freezing, but ask your installer about low-temperature performance and defrost behaviour, and expect the MCS heat-loss survey to drive the sizing decision. Radiator upgrades are more commonly recommended here so the system can run at efficient, lower flow temperatures.

Price on quote
No published price
£0
Grant in Northern Ireland
4.8
Best SCOP at 35°C (MCS)
2 yr (up to 7)
Warranty (standard)

NIBE S2125 Models Available

NIBE S2125-8

Price on quote
no published installed price
Size
8kW
NIBE size label; rated heat output 5.3 kW at 35°C (Pdesignh, average climate), 5.52 kW maximum at -7°C
SCOP 35°C / 55°C (MCS)
4.8 / 3.59
Running cost (est.)
~£625/yr
Sound power
49 dB(A)
Suitable for
smaller or well-insulated 2-3 bed homes
Grant in NI
None
Outdoor unit (HxWxD)
1080x1128x831mm
Weight
163kg

NIBE S2125-12

Price on quote
no published installed price
Size
12kW
NIBE size label; rated heat output 6.8 kW at 35°C (Pdesignh, average climate), 8.34 kW maximum at -7°C
SCOP 35°C / 55°C (MCS)
4.8 / 3.71
Running cost (est.)
~£620/yr
Sound power
49 dB(A)
Suitable for
typical 3-bed semi
Grant in NI
None
Outdoor unit (HxWxD)
1080x1128x831mm
Weight
163kg

Specifications and pricing are indicative for the UK market as at June 2026. Running costs assume ~10,000 kWh of heat a year at 26.32p/kWh (Ofgem cap average, October to December 2026; changes quarterly). Confirm current models and exact pricing with your MCS-certified installer.

How NIBE S2125 Performs in Craigavon's Climate

Very GoodClimate Zone 5 | R290 refrigerant

In this cooler climate (zone 5), specification matters more: frosty mornings mean more defrost cycles and a seasonal efficiency a touch below its certified SCOP (4.8 at 35°C, 3.59 at 55°C). NIBE S2125 remains a solid choice here when sized from a proper heat-loss survey, and radiator upsizing is more commonly recommended so the system can run at efficient flow temperatures. It reaches 75°C flow, which helps existing radiators carry the load without a full re-pipe.

Noise Levels in a Regional Area

NIBE S2125 declares a sound power of 49 dB(A) for this model: the noise the unit itself emits. What you hear next door is much lower and falls with distance, and permitted development rules require the installation to meet the MCS noise standard at the nearest neighbour. With more space between homes, meeting the noise standard is usually easier, but your installer still checks the siting.

Pros

  • R290 refrigerant
  • Quiet Mark certified (S2125-8 and S2125-12) with 49 dB(A) declared sound power
  • Up to 75°C flow, and up to 65°C at -25°C outdoor
  • Up to 7-year parts and labour warranty through NIBE Pro Partner installers
  • British Gas became an approved NIBE service partner in March 2025

Cons

  • Standard warranty is 2 years unless a NIBE Pro installer registers the extended cover
  • Heavy and deep: 163 kg and 831 mm deep for both the 8 and 12
  • Size labels overstate output: the S2125-12 is rated 6.8 kW at 35°C, 8.34 kW maximum at -7°C
  • Annual servicing is a condition of every NIBE warranty
  • No published installed price

Grants for NIBE S2125 in Craigavon

Heat pump grants

No Boiler Upgrade Scheme equivalent in Northern Ireland

The £7,500 grant available in England and Wales does not apply here, whichever brand you choose. 0% VAT on residential installations until 31 March 2027 still does, and limited efficiency support exists via NI schemes (see nidirect.gov.uk). Accurate as at July 2026.

£0

The heating picture in Northern Ireland

Northern Ireland is a genuinely different market: most homes heat with OIL, not mains gas, and there is currently no Boiler Upgrade Scheme equivalent - the £7,500 grant does not apply here. The 0% VAT relief still does. Heat pump economics rest on oil-price exposure and running-cost savings rather than grants; limited efficiency support exists via NI schemes (see nidirect.gov.uk).

Northern Ireland is a different market from Great Britain: most homes heat with oil, and there is currently no Boiler Upgrade Scheme equivalent, so the installed price is the full price. What still applies is 0% VAT on residential heat pump installations until 31 March 2027, and the running-cost case against oil. Limited efficiency support exists through NI schemes (see nidirect.gov.uk).

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Heat pump guides for Northern Ireland

NIBE S2125 in Craigavon: Frequently Asked Questions

How much does an air source heat pump cost in Craigavon?
An air source heat pump in Craigavon typically costs £8,350 to £14,350 fully installed (indicative, June 2026). Northern Ireland has no Boiler Upgrade Scheme equivalent, so that is the full price, although 0% VAT applies to residential heat pump installations until 31 March 2027 and is already reflected in quotes. The final price depends on the heat-loss survey, whether a hot water cylinder needs adding, and any radiator upgrades.
What heat pump grants are available in Craigavon?
Northern Ireland currently has no Boiler Upgrade Scheme equivalent: the £7,500 grant available in England and Wales does not apply here. Two things still help: 0% VAT on residential heat pump installations until 31 March 2027 (typically worth £1,000 to £3,000 versus standard VAT), and limited efficiency support through NI schemes listed on nidirect.gov.uk. Budget the full installed price of £8,350 to £14,350 (indicative, June 2026).
Do air source heat pumps work in Craigavon's climate?
Craigavon has a cooler northern climate with cold snaps and frosty mornings. This is one of the UK's cooler heating climates, so specification matters more here. Modern units hold useful output well below freezing, but ask your installer about low-temperature performance and defrost behaviour, and expect the MCS heat-loss survey to drive the sizing decision. Radiator upgrades are more commonly recommended here so the system can run at efficient, lower flow temperatures.
Is a heat pump cheaper to run than a gas boiler in Craigavon?
On the Ofgem price cap (electricity 26.32p per kWh, gas 7.97p per kWh from 1 October 2026), a heat pump running at a seasonal efficiency (SCOP) of 3.8 to 4.5 delivers heat at roughly 5.8 to 6.9p per kWh, against roughly 8.9p for a 90%-efficient gas boiler, so it runs below gas-boiler cost on cap rates. The 39% rise in the gas rate since spring 2026 has tilted the comparison further toward the heat pump. Households on heat-pump time-of-use tariffs typically do better again, though tariffs change so compare current offers. These are estimates: your actual costs depend on your tariff, your home's heat loss and how the system is set up.
How does the installation process work in Craigavon?
Every professional installation starts with a heat-loss survey of your home, which determines the heat pump output, the radiator sizing and whether your hot water cylinder needs upgrading or adding. The installer then fits the outdoor unit, cylinder and controls, commissions the system and walks you through it. If a gas boiler is being removed, that part of the work must be done by a Gas Safe registered engineer. Timescales are usually measured in days, not weeks; your installer will confirm after the survey.
What size air source heat pump do I need in Craigavon?
Sizing in the UK is driven by your home's heat loss, not just bedroom count: the heat-loss survey calculates it room by room. As a rough guide from the current UK model ranges, smaller well-insulated homes suit units around 5 to 8kW of heat output, typical 3 to 4 bed homes around 8 to 12kW, and large or older properties may need more. In a cooler climate like yours, the survey matters even more: low-temperature output and radiator upsizing are the difference between a system that just works and one that works efficiently.
Which air source heat pump brand is best for Craigavon?
In Craigavon's cooler climate (zone 5 on our 1-7 scale), cold-weather output matters most, so ask each installer for low-temperature output figures. Daikin rates its Altherma 3 R to work down to -25°C and the 3 H HT to -28°C, and the R290 units we track reach 70 to 75°C flow, which suits radiator retrofits.
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