LG Therma V Air Source Heat Pump Cost in Northern Ireland
Price on quote. LG Therma V 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).
No heat pump grant in Northern Ireland.
LG's Therma V R290 Monobloc is a self-contained outdoor unit using R290 refrigerant, sold in the UK through dealers and installers, with LG installer training in Weybridge and Derby. It comes in 7, 9, 12, 14 and 16 kW sizes, runs down to -28°C and can supply water at up to 75°C. The 9 kW and 12 kW models are rated A+++ at both 35°C and 55°C and are listed by Quiet Mark.
LG Therma V 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 |
|---|---|---|---|---|
| Therma V R290 Monobloc 9kW typical 3-bed semi or detached. 9.0 kW at A7/W35 (EN14511); 9.0 kW at -7°C | 9 kW | 5.04 / 3.75 | Price on quote | £780 |
| Therma V R290 Monobloc 12kW larger 4-bed homes. 12.0 kW at A7/W35 (EN14511); 11.8 kW at -7°C | 12 kW | 5.33 / 3.86 | Price on quote | £740 |
Pros
- R290 refrigerant, rated A+++ at both 35°C and 55°C flow
- Quiet Mark listed (9 kW and 12 kW), with 49 to 50 dB(A) declared sound power
- Strong cold-weather output: 9.0 kW (9 kW model) and 11.8 kW (12 kW model) at -7°C
- Up to 75°C flow and operation down to -28°C outdoor
- Up to 7-year warranty for homes per LG UK's consumer warranty page, with servicing
Cons
- Large and heavy: the 12 kW unit is 1,560 mm wide and weighs 181 kg
- LG UK's warranty pages do not say what qualifies for the extended term
- Standard warranty is 3 years, and LG requires servicing 'biannually'
- No published installed price
Best for: Homeowners who want a quiet R290 monobloc with strong cold-weather output from a major electronics brand. Warranty: 3 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.
LG Therma V prices in towns across Northern Ireland
Other brands in Northern Ireland
LG Therma V 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 LG Therma V heat pump cost in Northern Ireland?
LG Therma V 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). There is no heat pump grant in Northern Ireland; 0% VAT applies until 31 March 2027.
Can I get the grant on a LG Therma V 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 LG Therma V heat pump cost to run in Northern Ireland?
Roughly £740 a year for the Therma V R290 Monobloc 12kW 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 5.33 at 35°C and 3.86 at 55°C. A lower flow temperature, with bigger radiators or underfloor heating, costs less to run.
Who installs LG Therma V heat pumps in Northern Ireland?
MCS-certified installers across Northern Ireland fit LG Therma V. 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