LG Heat Pumps In Brief
If you are looking to replace your old boiler with a greener option that will save you money, then heat pumps are the energy efficient modern option. With an unrivalled energy efficiency, they provide some protection against rising energy prices, and can be used for both heating and cooling purposes.
LG offers a wide range of heat pumps and air-conditioning devices for home use. Their heat pump brands provide 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.
LG heat pumps are MCS certified, meaning those opting to have one installed could potentially make use of the government funding schemes and tax incentives, which can make a big difference to the payback time. LG heat pumps typically come with a seven year warranty.
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 | Hydrosplit Heat Pumps | Monobloc Heat Pumps |
| Flexible installation | Only water passes through the home | Single compact unit |
| Heating, cooling and hot water supply | Heating, cooling and hot water supply | Simple all-in-one solution providing heating, cooling and hot water supply |
| A+++ energy class (average climate at 35℃ water outlet) | A+++ energy class (average climate at 35℃ water outlet) | 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 | Leaving water temperature up to 65 ℃ | Leaving water temperature up to 65 ℃ |
| Works at outdoor temperature as low as -25 ℃ for R32 5,7,9kW, R410A and High Temperature models / -20 ℃ for R32 4,6kW models | Works at outdoor temperature as low as -25 ℃ | Works at outdoor temperature as low as -25 ℃ |
| Outdoor unit connects to indoor unit by refrigerant piping | Outdoor unit connects to indoor unit by water piping | No indoor space for indoor unit needed |
| Free of potential freezing risk | Wall-mounted hydro box or floor-standing integrated water tank type indoor unit | Safe indoor environment from leaking refrigerant |
| Wall-mounted hydro box or floor-standing integrated water tank type indoor unit |
LG Heat Pumps Pros and Cons
| Pros | Cons |
| Reduced energy bills – The LG Heat Pumps are highly efficient and can reduce energy bills significantly. | Initial cost outlay – it will be some time before the system pays for itself and starts saving you money. |
| Low noise levels – The units operate quietly, making them ideal for residential use. | Installation – putting in a heat pump is more complex than replacing a boiler. |
| 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. | May require upgrade of pipework/radiators – it is not always possible to utilise your existing central heating system. |
| Access to government grants – The product is MCS approved, which opens up various local and government grants and rebates. | Space requirements – some LG air source units require two units which can be problematic for those with smaller properties. |
| Seven year warranty. | Reduced efficiency – in colder months will require more electricity to produced the levels of heat required |
| Reliable and efficient – The units utilise LG’s own R1 scroll compressor, making them very reliable and efficient. |
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 known for its TVs, audio, computer systems and household appliances.
It is a truly global enterprise, with revenue of $5.19 billion in the first quarter of 2025 in just its Home Appliance & Air Solution Segment, which includes heat pumps. It has been manufacturing renewable energy systems since 2007 and expects to double its HVAC business revenue by 2030.
LG Air Source Heat Pumps FAQs
Q: How does a heat pump work?
A: It may seem counter-intuitive, but even cold ground, water or air has heat energy contained within it. Heat pumps require electricity to run the heat pump and extract this energy and then use this 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.
Air source heat pumps reduce fossil fuel reliance by generating up to 3-4 times the heat energy as the electricity it consumes, making it an excellent low-carbon solution. So for 100% heating you are effectively only using a quarter of the power to get the same result as a gas boiler.
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 what is effectively just 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 for your needs and to maximise savings.
Q: Do LG 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 Much Can You Save with an Air-Source Heat Pump?
A. 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 27.03 pence per kWh (based on The Energy Price Cap up to end of June 2025) the price cap would be a whopping £4,324.
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 27.03 per unit of electricity for 4,000 kWh, the annual heating costs of a heat pump would be around £1,081.
Q: How environmentally friendly 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.
It may seem counter-intuitive, but even cold ground, water or air has heat energy contained within it. Heat pumps require electricity to run the heat pump and extract this energy and then use this 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.
LG Heat Pump Summary
LG is one of the world’s premier technology brands. They have been making proven performance heat pumps for some time now 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.
LG heat pumps 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 there are various government incentives available to households to help them reduce the cost of a system and make a heat pump installation a much more affordable option.
