Daikin Altherma Air Source Heat Pump Cost in Northern Ireland
£7,000 to £14,000 installed in Northern Ireland, where there is no heat pump grant; 0% VAT applies until 31 March 2027.
Prices are PumpSwap's indicative figures for Daikin Altherma, not quotes. No heat pump grant in Northern Ireland.
Daikin's Altherma 3 range covers split and monobloc air-to-water heat pumps. The Altherma 3 R split pairs a compact outdoor unit with an indoor hydrobox; the Altherma 3 H HT reaches 70°C flow for homes keeping their radiators. Daikin rates the 3 R to keep working down to -25°C and the 3 H HT to -28°C.
Daikin Altherma models and running costs in Northern Ireland
Running costs for 10,000 kWh of heat a year at 34.15p per kWh (Power NI standard tariff including VAT, from 1 July 2026), at a 45°C design flow temperature: the midpoint of each model's MCS-certified 35°C and 55°C SCOPs.
| Model | Size | SCOP 35°C / 55°C | Installed | Running cost a year |
|---|---|---|---|---|
| Altherma 3 R 8kW 3-4 bed homes | 8 kW | 4.36 / 3.24 | £7,000 to £12,000 | £900 |
| Altherma 3 H HT 14kW large or hard-to-heat homes. 14 is the size class; rated output 13 kW at -10°C | 14 kW | 4.47 / 3.54 | £10,000 to £14,000 | £850 |
Pros
- Split design with a compact outdoor unit (58.5 kg for the 3 R 8kW)
- Altherma 3 H HT reaches 70°C flow for radiator systems
- Rated to work down to -25°C (3 R) and -28°C (3 H HT)
Cons
- Standard warranty is 2 years; 5 needs Stand By Me activation and annual maintenance
- The 3 R 8kW has a high sound power (62 dB(A)), so siting matters
Best for: Buyers wanting a split system with a small outdoor unit, or 70°C flow for radiators (3 H HT). Warranty: 2 years, up to 7 with conditions.
What Northern Ireland means for your heat pump
- Climate. January averages 7.2°C by day and 1.7°C at night, with 41 days of air frost a year (Met Office 1991-2020; UK 1.2°C and 53 days). The heat loss survey sizes the unit for your local design temperature.
- Heating fuel. 49.5% of Northern Ireland households heat with oil alone, against 31.58% on mains gas alone.
- Grant. No heat pump grant in Northern Ireland.
Full detail for the region, including planning rules and running costs against gas: air source heat pump cost in Northern Ireland.
Daikin Altherma prices in towns across Northern Ireland
Other brands in Northern Ireland
Daikin Altherma in other regions: London, South East England, South West England, East of England, East Midlands, West Midlands, Yorkshire and the Humber, North West England, North East England, Scotland, Wales.
Frequently asked questions
How much does a Daikin Altherma heat pump cost in Northern Ireland?
£7,000 to £14,000 installed. There is no heat pump grant in Northern Ireland, so that is what you pay; 0% VAT applies until 31 March 2027. These are PumpSwap's indicative 2026 prices.
Can I get the grant on a Daikin Altherma heat pump in Northern Ireland?
There is no heat pump grant for homeowners in Northern Ireland, whichever brand you choose. The 0% VAT relief on the installation still applies.
What would a Daikin Altherma heat pump cost to run in Northern Ireland?
Roughly £850 a year for the Altherma 3 H HT 14kW to deliver 10,000 kWh of heat at 34.15p per kWh (Power NI standard tariff including VAT, from 1 July 2026). That assumes a 45°C design flow temperature, estimated from its MCS-certified SCOPs of 4.47 at 35°C and 3.54 at 55°C. A lower flow temperature, with bigger radiators or underfloor heating, costs less to run.
Who installs Daikin Altherma heat pumps in Northern Ireland?
MCS-certified installers across Northern Ireland fit Daikin Altherma. Ask for a heat loss survey and compare two or three quotes on the same basis: unit size, cylinder, radiator changes and warranty.
Heat pump guides for Northern Ireland
Prices, models, efficiency and warranties are indicative and change; confirm with your MCS-certified installer. Climate: Met Office 1991-2020 averages. Energy prices: Power NI standard tariff including VAT, from 1 July 2026.
Where are you?
See indicative costs and local installers for your area