LG Therma V heat pumps cost between £7,000 and £14,000 installed in 2026
The installed cost for a typical 3-bedroom home ranges from £7,000 to £14,000, depending on system complexity and house size. The LG Therma V R290 monobloc model is typically priced at the lower end of this range. The LG Therma V Split model, requiring an indoor unit and refrigerant line installation, is at the higher end.
LG Therma V heat pumps cost £7,000-£14,000 installed for a typical 3-bed home. The £7,500 Boiler Upgrade Scheme grant cuts net cost to £0-£6,500. SCOP ranges from 4.1 to 4.8, delivering annual savings of £200-£500 over gas.
- Installed cost ranges from £7,000 to £14,000 for a 3-bed home.
- Boiler Upgrade Scheme reduces net cost to £0-£6,500.
- LG Therma V R290 monobloc achieves SCOP up to 4.8.
- Annual savings of £200-£500 over a gas boiler are typical.
- Replacing electric storage heaters saves £600-£900 yearly.
- LG Therma V heat pumps cost between £7,000 and £14,000 installed in 2026
- LG Therma V heat pumps achieve a seasonal efficiency (SCOP) of 4.1 to 4.8
- A typical household saves £200 to £500 per year on heating bills with an LG Therma V
- Quick numbers LG Therma V costs, savings, and payback at a glance
- The LG Therma V review it is a reliable, quiet heat pump with good efficiency but higher upfront cost than some rivals
- LG Therma V installation requires an MCS-certified installer and a full property survey
- The LG Therma V R290 model uses propane refrigerant, which has a lower environmental impact than older refrigerants
- LG Therma V warranty covers 7 years standard, with a 10-year option on the compressor
Energy Saving Trust data shows average heat pump installation costs for a typical UK home fall within this bracket (Energy Saving Trust, 2026). MCS register installation data confirms that system complexity and property size are the main cost drivers. The £7,500 Boiler Upgrade Scheme grant reduces the net cost to between £0 and £6,500 for eligible homeowners (GOV.UK, 2026).
LG Therma V heat pumps achieve a seasonal efficiency (SCOP) of 4.1 to 4.8
SCOP, or Seasonal Coefficient of Performance, measures the kWh of heat output per kWh of electricity input over a full heating season. The LG Therma V R290 monobloc achieves a SCOP of up to 4.8, verified via the MCS product database. The LG Therma V Split model has a SCOP of up to 4.1, according to LG product specifications.
A SCOP of 4.0 means 1 kWh of electricity produces 4 kWh of heat. By comparison, a modern gas boiler operates at roughly 0.9 efficiency, meaning it produces 0.9 kWh of heat from 1 kWh of gas (Energy Saving Trust, 2026). The higher the SCOP, the lower the running cost for the same amount of heat delivered.
A typical household saves £200 to £500 per year on heating bills with an LG Therma V
Annual savings over a gas boiler depend on the home’s heat demand and the heat pump’s SCOP. For a typical 3-bedroom home with a 12,000 kWh annual heat demand, savings of £200 to £500 per year are achievable (Energy Saving Trust savings calculator, 2026). Savings are higher if replacing electric storage heaters (£600 to £900 per year) or oil or LPG (£400 to £700 per year), according to Energy Saving Trust data.
The savings assume the home is well-insulated. Retrofit insulation can increase savings by 20 to 40 per cent. Ofgem fuel price data for April 2026 confirms current electricity and gas unit rates used in these calculations (Ofgem, 2026).
Quick numbers LG Therma V costs, savings, and payback at a glance
| Metric | Value | Notes |
|---|---|---|
| Installed cost (after £7,500 grant) | £0 – £6,500 | Depends on property size and model |
| Annual running cost (gas replacement) | £400 – £700 | Based on 12,000 kWh heat demand |
| Annual savings vs gas boiler | £200 – £500 | Higher with oil or LPG replacement |
| Simple payback period (after grant) | 0 – 13 years | Calculated from EST savings and cost ranges |
| SCOP range | 4.1 – 4.8 | R290 model achieves 4.8 |
| Warranty (manufacturer) | 7 years standard, 10 years optional | Conditional on annual servicing |
Source for warranty: LG UK product page, 2026. Source for payback: calculated from Energy Saving Trust savings and installed cost ranges (Energy Saving Trust, 2026).
The LG Therma V review it is a reliable, quiet heat pump with good efficiency but higher upfront cost than some rivals
The LG Therma V is a UK-market air-source heat pump available in R290 monobloc and Split models. Key strengths include a high SCOP of up to 4.8, low noise levels of 29 dB(A) at 1 metre for the R290 model, and a 7-year warranty. The key weakness is that the installed cost after the grant is still £0 to £6,500, which may be higher than some competing brands such as the Vaillant aroTHERM plus or Mitsubishi Ecodan.
Noise data comes from the LG product datasheet for 2026. Competitor pricing is drawn from MCS register installation cost data for 2026. Overall, the LG Therma V is a strong option for homeowners prioritising efficiency and low noise, but the payback period depends on house insulation and existing fuel type. comparing heat pump brands and costs
LG Therma V installation requires an MCS-certified installer and a full property survey
MCS certification is mandatory for the installer to be eligible for the Boiler Upgrade Scheme grant (GOV.UK BUS guidance, 2026). The installer must also be TrustMark-registered (GOV.UK TrustMark page, 2026). The installation process begins with a site survey that assesses heat loss using an MCS heat loss calculation, existing radiator sizing, and hot water cylinder suitability.
LG recommends a specific installer network. You can check the LG UK website for a “Find an Installer” tool. The homeowner must have a valid Energy Performance Certificate with no outstanding recommendations for loft and cavity wall insulation (GOV.UK BUS eligibility, 2026). preparing your home for a heat pump installation
The LG Therma V R290 model uses propane refrigerant, which has a lower environmental impact than older refrigerants
R290, or propane, has a Global Warming Potential of 3. This compares to R32 with a GWP of 675 and R410A with a GWP of 2088 (DESNZ refrigerant data, 2026). The R290 model is slightly larger and requires outdoor installation with a minimum 1 metre clearance from windows and doors, according to the LG installation manual.
The Split model uses R32 refrigerant, which is still widely used but less environmentally friendly. The R290 model is more efficient with a SCOP up to 4.8 versus 4.1 for the Split model, but it may not suit all properties due to space and setback requirements.
LG Therma V warranty covers 7 years standard, with a 10-year option on the compressor
The standard warranty covers 7 years on the entire unit, including parts and labour from LG (LG UK warranty page, 2026). An optional extended warranty of 10 years on the compressor is available through LG’s registered installer network. The warranty is conditional on annual servicing by an MCS-certified engineer, as stated in LG warranty terms and conditions.
The warranty does not cover the hot water cylinder, pipework, or radiators. These components are covered by separate manufacturer warranties. For full details, check the LG UK “Therma V warranty” page for 2026.
Frequently Asked Questions
Installed costs range from £7,000 to £14,000 for a typical 3-bedroom home in 2026, according to Energy Saving Trust data. The £7,500 Boiler Upgrade Scheme grant reduces the net cost to between £0 and £6,500 for eligible homeowners (GOV.UK, 2026).
The LG Therma V R290 monobloc achieves a SCOP of up to 4.8, verified via the MCS product database. The LG Therma V Split model has a SCOP of up to 4.1, according to LG product specifications.
A typical household saves £200 to £500 per year on heating bills over a gas boiler, based on Energy Saving Trust savings calculator data (2026). Savings are higher if replacing electric storage heaters (£600-£900) or oil/LPG (£400-£700).
Yes, for most homes with suitable insulation and a gas boiler replacement, the LG Therma V offers SCOP up to 4.8 and annual savings of £200-£500. The £7,500 Boiler Upgrade Scheme grant makes it cost-effective (GOV.UK, 2026).
The LG Therma V uses electricity with a SCOP of 4.1-4.8, meaning 1 kWh of electricity produces 4.1-4.8 kWh of heat. A modern gas boiler operates at roughly 0.9 efficiency, producing 0.9 kWh of heat from 1 kWh of gas (Energy Saving Trust, 2026).
