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Air-to-water heat pumps use energy from outdoor air to support space heating and hot water. Choosing the right system starts with understanding your property and the way you use it.
01Heat pumps can extract as much as 75% of the energy they consume from ambient air. They offer an eco-conscious alternative to fossil-fuel boilers for heating and hot water — and, like an air conditioner, can provide cooling too.
02Heat pumps need proper airflow to work efficiently, so allow around a metre of clear space around the unit. They can sit on a flat rooftop, though ground level is ideal, and should be positioned at least a metre from any property boundary, subject to local noise regulations.
03A monobloc heat pump contains all its components in a single outdoor unit, connecting directly to a water tank with no indoor unit or refrigerant piping needed. It’s straightforward to install, removes the risk of refrigerant leaking into the house, and can be fitted by any trained heating engineer without additional F-gas qualifications. The trade-off is a larger, heavier outdoor unit, so available space matters.
04Monobloc requires only water piping connections, eliminating the need for additional refrigerant piping work. This not only simplifies installation but also ensures a space-efficient solution in limited interior space.
05The energy-efficient R1 compressor increases the performance of heating and hot water while reducing costs. The Monobloc also offers stable heating thanks to a wide operation range down to -15°C.
06Experience the freedom of remote home management. The LG ThinQ app enables convenient temperature control and real-time energy consumption monitoring, optimising overall home energy efficiency. A WiFi modem is required.
Twelve monobloc models covering 5–16kW output, single and three-phase, so there is a unit sized to suit most Irish homes.
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Energy grade A+++Product Information SheetHM071MR U44
Energy grade A+++Product Information SheetHM091MR U44
Energy grade A+++Product Information SheetHM121MR U34
Energy grade A+++Product Information SheetHM123MR U34
Energy grade A+++Product Information SheetHM141MR U34
Energy grade A+++Product Information SheetHM143MR U34
Energy grade A+++Product Information SheetHM161MR U34
Energy grade A+++Product Information SheetHM163MR U34
Energy grade A+++Product Information SheetHM123MRS UB40
Energy grade A+++Product Information SheetHM143MRS UB40
Energy grade A+++Product Information SheetHM163MRS UB40
Energy grade A+++Product Information SheetYou may already be using this technology without realising it — a fridge uses the same basic principle to remove heat from the food inside and eject it outside, keeping the food cold. A heat pump reverses this process, extracting heat energy from the outside air, ground or water and moving it into your home to provide heating and hot water.
An air source heat pump, such as the market-leading LG range, is essentially a unit that sits outside your home and uses a fan to draw air through the refrigerant piping, where the heat energy is harvested and upgraded. It runs on electricity, converting each kilowatt of electrical energy into 2, 3, 4 or more kilowatts of heat energy — free, renewable energy replaced each day by the sun.
A number of factors affect installation cost, including the age and size of your property, insulation and thermal efficiency, and the number of rooms and radiators. On average, installation costs between £5,400 and £10,800 depending on these factors.
This depends on your current heating system, but even against a gas boiler you’re likely to make significant savings. For oil, LPG or direct electric heating, the savings can be even greater.
For a new-build home, an air source heat pump can typically be installed in a couple of days. For a refurbishment, timing depends on whether radiators need replacing, the water cylinder needs re-siting and where the outdoor unit will be fitted — including whether you are replacing your existing system entirely or adding a heat pump alongside it in a hybrid setup.
Modern air source heat pumps are designed specifically for UK & Ireland conditions, continuing to work at maximum efficiency down to -10°C and carrying on working to -20°C or beyond, so you can rely on a warm home even with snow on the ground.
The outdoor unit has a fan that draws air across the internal components, producing a whirring noise in operation. The amount of noise depends on the quality of the product — the latest models are amongst the quietest available, running close to the noise level of a typical library, which gives more flexibility in where the outdoor unit can be sited.
Yes. Modern systems come with smart controls that let you monitor and control your heating from anywhere via an app, see how much energy you’re using, spot trends and adjust your heating to match your needs. These controls also mean your installer can access the system remotely to check it’s running efficiently and troubleshoot if needed.
Suitability depends on the building and its current heating system. Tell us about the property, insulation and radiators or underfloor heating so we can discuss the next steps.
Tell us about your project. Our team will help you take the next step.