LG Therma V Air Source Heat Pump
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 air source heat pump price UK (2026)
The Boiler Upgrade Scheme takes £7,500 off in England and Wales (£9,000 for off-gas homes replacing oil or LPG heating, until 31 March 2027); your MCS-certified installer claims it for you. Scotland uses the Home Energy Scotland grant and loan instead; Northern Ireland has no equivalent. 0% VAT until 31 March 2027 is already reflected. 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). Running cost estimated at ~10,000 kWh of heat a year and 26.32p/kWh electricity (October to December 2026 cap). Accurate as at October 2026.
Warranty: LG UK's consumer warranty page lists Therma V at 3 years basic and 7 years extended, with the unit serviced 'biannually'. LG UK's business page lists 5 years extended but directs private homes to the consumer page. Neither page states what qualifies a home for the extended term.SCOP is the MCS-certified seasonal efficiency; sound power is the maker's declared ErP figure, the like-for-like noise measure (what you hear next door depends on distance and siting). Prices are indicative; confirm with your MCS-certified installer.
Available Models
Therma V R290 Monobloc 9kW
Therma V R290 Monobloc 12kW
Specifications from the makers' datasheets and the MCS product directory, checked October 2026; prices are indicative. Running costs: Estimate for 10,000 kWh of heat a year at 26.32p per kWh (Ofgem price cap, October to December 2026), at a 45°C design flow temperature: the midpoint of the certified 35°C and 55°C SCOPs. Post-grant figures illustrate the £7,500 Boiler Upgrade Scheme in England and Wales. Confirm current models and exact pricing with your MCS-certified installer.
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
LG Therma V pricing and grants in your region
The hardware is the same everywhere; the support is not. England and Wales use the £7,500 Boiler Upgrade Scheme, Scotland the Home Energy Scotland grant and loan, and Northern Ireland currently has no grant. Each regional guide covers exactly what applies.
LG Therma V air source heat pump FAQ
How much is a LG Therma V air source heat pump installed in the UK (2026)?
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). In England and Wales the £7,500 Boiler Upgrade Scheme grant comes off whatever your installer quotes (£9,000 for off-gas homes replacing oil or LPG, until 31 March 2027), and 0% VAT applies. Ask for two or three written quotes on the same basis: unit size, cylinder, radiator changes and warranty.
Is a LG Therma V heat pump eligible for the £7,500 grant?
Yes. Every air-to-water unit on this page qualifies for the Boiler Upgrade Scheme in England and Wales when it is fitted by an MCS-certified installer, who applies for the grant on your behalf so it comes straight off the quote. Off-gas homes replacing oil or LPG heating can claim £9,000 instead, until 31 March 2027. Scotland uses the Home Energy Scotland grant and loan instead; Northern Ireland currently has no equivalent scheme. Grant details accurate as at October 2026.
Is LG Therma V a good air source heat pump brand?
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 is best suited to homeowners who want a quiet r290 monobloc with strong cold-weather output from a major electronics brand.
What is the warranty on a LG Therma V heat pump?
LG UK's consumer warranty page lists Therma V at 3 years basic and 7 years extended, with the unit serviced 'biannually'. LG UK's business page lists 5 years extended but directs private homes to the consumer page. Neither page states what qualifies a home for the extended term. Workmanship cover for the installation itself comes separately from your installer. Most extended terms depend on registering the product and annual servicing, so keep your installation paperwork and MCS certificate.
How efficient is a LG Therma V air source heat pump?
The Therma V R290 Monobloc 9kW has an MCS-certified SCOP (seasonal coefficient of performance) of 5.04 at 35°C flow and 3.75 at 55°C, so over a heating season each 1 kWh of electricity delivers about 3.75 to 5.04 kWh of heat, depending on how hot your system runs. At a 45°C design flow and the Ofgem cap rate (26.32p/kWh), 10,000 kWh of heat costs an estimated £600 a year, against roughly £890 for a 90%-efficient gas boiler at the current cap gas rate (7.97p/kWh from 1 October 2026). Estimates, not quotes; heat pump time-of-use tariffs can do better.
How long does a LG Therma V heat pump last?
With an annual service, heat pumps are generally expected to run well beyond their warranty period (LG Therma V: 3 years, up to 7 with conditions). Longevity depends on correct sizing (the MCS heat-loss survey), sensible siting and regular servicing. Confirm design life and extended-warranty options for your specific model with your MCS-certified installer.
LG Therma V vs other brands: which should I pick?
LG Therma V publishes no installed price, so we do not place it on price. Its R290 Monobloc 9 kW and 12 kW are rated A+++ at both 35°C and 55°C, hold 9.0 kW and 11.8 kW at -7°C, and are Quiet Mark listed at 49 to 50 dB(A). See the side-by-side comparisons below for direct head-to-head specs.
LG Therma V vs other heat pump brands
Heat pump guides
- Air source heat pump installation cost in the UK
- The best air source heat pumps in the UK, compared
- The £7,500 Boiler Upgrade Scheme, explained
- Air source heat pumps: costs, grants and brands
- Heat pump grants in London
- Heat pump grants in South East England
- Heat pump grants in South West England
- Heat pump grants in East of England
- Heat pump grants in East Midlands
- Heat pump grants in West Midlands
- Heat pump grants in Yorkshire and the Humber
- Heat pump grants in North West England
- Heat pump grants in North East England
- Heat pump grants in Scotland
- Heat pump grants in Wales
- Heat pump grants in Northern Ireland
Other heat pump brands
Where are you?
See indicative costs and local installers for your area