PumpSwap

LG Therma V Air Source Heat Pump in St Albans, East of England

South KoreaClimate Zone 4

Looking at a LG Therma V air source heat pump for your St Albans home? LG Therma V 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). After the £7,500 Boiler Upgrade Scheme grant, that is your quote less £7,500 out of pocket; your MCS-certified installer claims the grant for you. Homeowners who want a quiet R290 monobloc with strong cold-weather output from a major electronics brand.

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). The typical pre-grant installed range for St Albans is £8,250 - £14,250.

Air source heat pumps are well proven in this climate. Expect a modest efficiency dip on the coldest mornings, when units run short defrost cycles, but seasonal performance (SCOP) remains strong for a correctly sized system. The MCS heat-loss survey carried out before installation makes sure the unit and radiators are sized for your home rather than a brochure average.

Price on quote
No published price
Price on quote
After grant (illustrative)
5.33
Best SCOP at 35°C (MCS)
3 yr (up to 7)
Warranty (standard)

LG Therma V Models Available

Therma V R290 Monobloc 9kW

Price on quote
no published installed price
Size
9kW
9.0 kW at A7/W35 (EN14511); 9.0 kW at -7°C
SCOP 35°C / 55°C (MCS)
5.04 / 3.75
Running cost (est.)
~£600/yr
Sound power
50 dB(A)
Suitable for
typical 3-bed semi or detached
After £7,500 grant (illustrative)
Price on quote
Outdoor unit (HxWxD)
1019x1320x520mm
Weight
130kg

Therma V R290 Monobloc 12kW

Price on quote
no published installed price
Size
12kW
12.0 kW at A7/W35 (EN14511); 11.8 kW at -7°C
SCOP 35°C / 55°C (MCS)
5.33 / 3.86
Running cost (est.)
~£575/yr
Sound power
49 dB(A)
Suitable for
larger 4-bed homes
After £7,500 grant (illustrative)
Price on quote
Outdoor unit (HxWxD)
1019x1560x520mm
Weight
181kg

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 LG Therma V Performs in St Albans's Climate

ExcellentClimate Zone 4 | R290 refrigerant

LG Therma V handles this temperate climate (zone 4) comfortably. Cold snaps trigger short defrost cycles that trim efficiency slightly, but a correctly sized unit holds a seasonal efficiency near its certified SCOP (5.04 at 35°C, 3.75 at 55°C). It reaches 75°C flow, which helps existing radiators carry the load without a full re-pipe. The MCS heat-loss survey confirms output and radiator sizing for your home.

Noise Levels in a Regional Area

LG Therma V declares a sound power of 50 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, 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

Grants for LG Therma V in St Albans

Boiler Upgrade Scheme

£7,500 off, claimed for you by your MCS-certified installer

Every LG Therma V air-to-water model on this page qualifies for the Boiler Upgrade Scheme in East of England when fitted by an MCS-certified installer, who applies on your behalf so the grant comes straight off the quote. Homes heated by oil or LPG get £9,000 until March 2027. The EPC precondition was removed in April 2026 and the scheme runs to 2030. 0% VAT until 31 March 2027 applies on top. Accurate as at July 2026.

Full grant details for East of England→

The heating picture in East of England

Most homes here heat with a mains-gas boiler, and the Ofgem price cap gas rate has risen 39% since spring 2026 (5.74p per kWh in April-June to 7.97p from 1 October 2026). With £7,500 off through the Boiler Upgrade Scheme and 0% VAT until March 2027, replacing the boiler with an air source heat pump at end-of-life is now cost-competitive up front and on running costs. Rural Norfolk and Suffolk have sizeable oil-heated pockets eligible for the £9,000 uplift.

There is no gas ban in the UK and nobody is forcing the switch. The pressure is price: the Ofgem price cap gas unit rate has risen 39% since spring 2026 (5.74p per kWh in April-June to 7.97p from 1 October 2026). For St Albans households on a gas boiler, the practical takeaway is to plan ahead: keep using and repairing the boiler you have, but when it reaches end-of-life, pricing a heat pump against a new boiler (with the £7,500 Boiler Upgrade Scheme and 0% VAT in the maths) is now the rational default.

Compare Other Brands in St Albans

Mitsubishi Electric Ecodan
From £9,000 pre-grant
View in St Albans
Daikin Altherma
From £7,000 pre-grant
View in St Albans
Vaillant aroTHERM plus
From £10,000 pre-grant
View in St Albans
Octopus Cosy
From £8,000 pre-grant
View in St Albans
Samsung EHS
From £8,000 pre-grant
View in St Albans
Grant Aerona3
From £8,000 pre-grant
View in St Albans
Worcester Bosch
From £9,000 pre-grant
View in St Albans
Viessmann Vitocal
From £10,000 pre-grant
View in St Albans
Panasonic Aquarea
Price on quote
View in St Albans
NIBE S2125
Price on quote
View in St Albans
Ideal Logic Air
Price on quote
View in St Albans
Aira
From £14,229 pre-grant
View in St Albans
All brand costs in St AlbansFull LG Therma V review

Heat pump guides for East of England

LG Therma V in St Albans: Frequently Asked Questions

How much does an air source heat pump cost in St Albans?
Most St Albans households pay £750 to £6,750 out of pocket (indicative, June 2026) after the £7,500 Boiler Upgrade Scheme grant is deducted from a typical pre-grant installed price of £8,250 to £14,250. Your MCS-certified installer claims the grant for you, so the discount comes straight off the quote. 0% VAT on residential installations (until 31 March 2027) is already reflected in quoted prices. Combi-to-cylinder conversions and radiator upgrades push costs toward the top of the range.
What heat pump grants are available in St Albans?
St Albans households can use the Boiler Upgrade Scheme: £7,500 off an air-to-water or ground-source heat pump (£2,500 for air-to-air, £5,000 for biomass), rising to £9,000 for homes heated by oil or LPG until March 2027. The EPC-certificate precondition was removed on 28 April 2026, and the scheme has been extended to 2030. Your installer must be MCS-certified and applies on your behalf, so the grant comes straight off the quote. 0% VAT on residential installations applies until 31 March 2027 on top.
Do air source heat pumps work in St Albans's climate?
St Albans has a temperate climate with cool winters. Air source heat pumps are well proven in this climate. Expect a modest efficiency dip on the coldest mornings, when units run short defrost cycles, but seasonal performance (SCOP) remains strong for a correctly sized system. The MCS heat-loss survey carried out before installation makes sure the unit and radiators are sized for your home rather than a brochure average.
Is a heat pump cheaper to run than a gas boiler in St Albans?
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 St Albans?
Every grant-backed installation starts with a heat-loss survey of your home (an MCS requirement), 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 St Albans?
Sizing in the UK is driven by your home's heat loss, not just bedroom count: the heat-loss survey that comes with every Boiler Upgrade Scheme installation 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 your milder climate, correctly sized systems hold their efficiency well through winter.
Which air source heat pump brand is best for St Albans?
St Albans sits in climate zone 4 on our 1-7 scale, where every brand we track performs well. The differences are in flow temperature (the R290 units reach 70 to 75°C for radiator systems), warranty terms, declared sound power and price, which our brand comparisons set side by side.
Free Quote
Step 1 of 4

Where are you?

See indicative costs and local installers for your area

100% freeNo obligationTakes 30 sec

More Air Source Heat Pump Info for St Albans

All brands cost comparison in St AlbansMitsubishi Electric Ecodan in St AlbansDaikin Altherma in St AlbansVaillant aroTHERM plus in St AlbansOctopus Cosy in St AlbansReplace a gas boiler in St AlbansFind installers in St Albans