LG Heat Pump Review

Check Eligibility Online in 60 Seconds
LG logo

LG Heat Pumps In Brief:

If you are looking to upgrade your old boiler, and wanting to go with greener heating and cooling for your home, or simply to save money, then heat pumps are the modern option. They are much more energy efficient than other heating and cooling products. 

Many residential customers are switching to heat pumps to replace their old inefficient boilers. If your home has a solar panel installation, then a heat pump system will complement it nicely.

There are various government incentives to help with some of the costs involved, so it can be advantageous to take advantage of these financial options. The installation company can advise you on what is available, depending on where in the UK you live.

LG have a wide range of heat pumps and air-conditioning devices for home use. Their heat pump brands offer a variety of models to suit different sizes of property and budget. This includes single “monobloc” units for heating small areas, to multiple systems for large properties, including their stylish “mirror” range which features an aesthetic for modern homes.

Eligible homeowners have access to government grants:  LG heat pumps are MCS approved, meaning there is the availability of grant schemes and tax incentives which can make a big difference to the payback time. LG heat pumps come with a seven year warranty.

LG Company Overview:

LG is one of the most familiar of South Korean companies. The industrial giant was founded in the 1950s and operates in many sectors, from electronics to chemicals. It has designed some of the most innovative products for consumers, although it is mainly famous for TVs, audio, computer systems and household appliances.

It is a truly global enterprise, with revenue of $1.3 billion and 75,000 employees worldwide in 2022. It has been manufacturing renewable energy systems since 2007.

How does a Heat Pump Work?

It may seem counter-intuitive, but even cold ground, water or air has energy contained within it. Heat pumps use a little energy to extract this energy then use it to heat a medium like water, and circulate it to radiators, for example, in the conventional way. It is a much more efficient, modern, and green way to heat your home.

How Much Can You Save with an Air-Source Heat Pump?

What does a heat pump cost to operate compared to natural gas or grid electricity? Let’s look at an example based on an average house. 

An air-source heat pump can produce 4kWh heat output for every 1kWh of electricity supplied. If we say, for example, that the average heating demand for a 4-person home (100m2) using only electricity is about 16,000 kWh, the annual cost to heat a home for this demand with electricity at £0.16 would be £2,560. 

With a heat demand of 16,000 kWh and a heat pump output of 4kWh per 1kWh of electricity, this shows us that the residence would need about 4,000 kWh of electricity to heat the average home with a heat pump. At a cost of £0.16 per unit of electricity for 4,000 kWh, the annual heating costs of a heat pump would be around £640.

LG Heat Pump Specifications

LG THERMA V Air-to-Water Heat Pumps

Most heat pumps come in a “split” configuration: there is an outdoor unit, which looks like an air conditioner, and an indoor unit, similar to a boiler, which supplies hot water. For single rooms and small dwellings, LG offers a “Monobloc” range, which puts everything into one housing for compactness.

LG heat pumps have a Wi-Fi enabled app, ThinQ, available on Google Play and the Apple App Store. ThinQ lets you manage temperatures for your heat pumps and control it remotely from a phone or tablet. The ThinQ app also lets you manage other LG appliances in the same app, so if you own smart LG products like a refrigerator, cooker, dishwasher, washing machine, or dryer.

Split Heat Pumps

  • Flexible installation
  • Heating, cooling and hot water supply
  • A+++ energy class (average climate at 35℃ water outlet)
  • Leaving water temperature up to 65 ℃ for R32 / 5,7,9kW models / 57 ℃ for R410A models / 55 ℃ for R32 4,6kW models / 80℃ for High temperature model
  • Works at outdoor temperature as low as -25 ℃ for R32 5,7,9kW, R410A and High Temperature models / -20 ℃ for R32 4,6kW models
  • Outdoor unit connects to indoor unit by refrigerant piping
  • Free of potential freezing risk
  • Wall-mounted hydro box or floor-standing integrated water tank type indoor unit

Hydrosplit Heat Pumps

  • Only water passes through the home
  • Heating, cooling and hot water supply
  • A+++ energy class (average climate at 35℃ water outlet)
  • Leaving water temperature up to 65 ℃
  • Works at outdoor temperature as low as -25 ℃
  • Outdoor unit connects to indoor unit by water piping
  • Wall-mounted hydro box or floor-standing integrated water tank type indoor unit

Monobloc Heat Pumps

  • (Single compact unit)
  • Simple all-in-one solution
  • Heating, cooling and hot water supply
  • A+++ energy class (average climate at 35℃ water outlet)
  • Leaving water temperature up to 65 ℃
  • Works at outdoor temperature as low as -25 ℃
  • No indoor space for indoor unit needed
  • Safe indoor environment from leaking refrigerant

LG Heat Pumps Pros and Cons

LG heat pump


  • Reduced energy bills – The LG Heat Pumps are highly efficient and can reduce energy bills significantly.
  • Low noise levels – The units operate quietly, making them ideal for residential use.
  • Lower carbon footprint – The LG Heat Pumps use the low GWP refrigerant R32, meaning they have a reduced carbon footprint compared to other heat pumps on the market.
  • Access to government grants – The product is MCS approved, which opens up various local and government grants and rebates.
  • Seven year warranty.
  • Reliable and efficient – The units utilise LG’s own R1 scroll compressor, making them very reliable and efficient.


  • Cost of outlay: it will be some time before the system pays for itself and starts saving you money.
  • Installation: putting in a heat pump is slightly more complex than replacing a boiler.

LG Air Source Heat Pumps FAQs

Q: How Does a Heat Pump Work?

A. Air source heat pumps reduce fossil fuel reliance by harnessing a combination of 25% electricity and 75% outside air : an excellent low-carbon solution. So for 100% heating you are only using a quarter of the power to get the same result as a boiler. Essentially all heat pumps: air, water, ground, take natural energy from the environment in a sustainable way for heating and cooling.

Q: Is there a difference between air source heat pumps and air-to-water heat pumps (AWHPs)?

A: No, it’s just two different ways to describe the same technology.

Q: Why are there so many different types of LG Heat Pumps and which one is right for my home?

A: There are numerous different configurations, depending on property size, location, heating system, but do not worry, there will be an LG heat pump system that will suit your needs. Consult your installer for the correct setup.

Q: Do heat pumps work in cold weather?

A: Yes, they do. However their efficiency may be diminished. The LG Therma V models are designed to be capable of providing heating in temperatures as low as -25°C, so these could be the model of choice if you live in a cold part of the UK. Even so, a heat pump will still be considerably cheaper to heat your home than a conventional gas boiler.

Q: How green is a heat pump?

A: Heat pumps are much better for the environment. Heat pumps can reduce CO2 emissions by 35-65% compared to gas boilers. According to the European Heat Pump Association (EHPA), heat pumps contributed to a reduction of over 9 million tons of CO2 emissions in the EU.

LG Heat Pump Summary

LG are one of the world’s premier technology brands. They have been making heat pumps for a long time and would certainly be a good option for any residential heat pump system. Their range offers models for single rooms and small dwellings, as well as multi-unit systems for larger homes.

They are considered very reliable, and can operate in low temperatures. Their low noise levels are particularly valued for residential properties, where quietness of operation is important. Another positive is that, depending on locality, there will be various incentives available to reduce the cost of the system.

Connect with an installer & qualify for £7,500 in funding.
You don't need to be claiming benefits!
On This Page
Ollie Creevy
Ollie has been writing content online about home improvements for over 3 years. With a real interest and in-depth knowledge of heat pumps and ECO home improvement measures you can use to save on your energy bills. Ollie also keeps up to date with all the Government grants available for you to take advantage of like ECO4 and the Boiler Upgrade Scheme.