Heat pumps are the future of home heating in Ireland. The government wants 400,000 existing homes fitted with heat pumps by 2030, and as of February 2026, you can get up to €12,500 in SEAI grants towards installation – nearly doubling the previous maximum.
But heat pumps are still a big investment, and the decision is not straightforward. This guide covers everything Irish homeowners need to know: how heat pumps work, what they cost, what grants are available, whether your home is suitable, and what savings you can realistically expect.
🔧 How Does a Heat Pump Work?
A heat pump works like a fridge in reverse. Instead of pulling heat out of your fridge to keep food cold, a heat pump pulls heat from outside – from the air, ground or water – and transfers it into your home.
It does this by circulating a refrigerant through a cycle of evaporation and compression. The refrigerant absorbs heat from the outside source, passes through a compressor which raises the temperature, then releases that heat into your home’s heating system – radiators, underfloor heating or hot water tank.
The remarkable thing about heat pumps is their efficiency. For every 1 unit of electricity they use, they can produce 3 to 4 units of heat. This is measured as the Coefficient of Performance (COP) or Seasonal Coefficient of Performance (SCOP). A SCOP of 4.0 means you get four times more heat energy out than the electrical energy you put in.
This makes heat pumps far more efficient than any boiler. An oil or gas boiler converts fuel to heat at roughly 88-90% efficiency. (Hoping to replace a boiler like-for-like instead? There is no boiler grant – see what actually exists.) A heat pump operates at 300-500% efficiency.
🏠 Types of Heat Pump Available in Ireland
There are three main types of heat pump, and each has its own pros, cons and costs.
🔹 Air Source Heat Pumps (Air-to-Water)
These are by far the most popular heat pumps in Ireland, accounting for around 73% of all installations – our air-to-water cost guide has detailed pricing. They extract heat from the outside air and use it to heat water, which is then circulated through radiators or underfloor heating and stored in a hot water cylinder.
Air-to-water heat pumps work even when outdoor temperatures drop below freezing – they just become slightly less efficient as temperatures fall. In Ireland’s mild climate, they perform well year-round.
They require an outdoor unit (roughly the size of a large suitcase) mounted on a wall bracket or placed on the ground outside your home. Installation is relatively straightforward compared to ground source systems.
Typical cost: €8,500 – €18,000 fully installed (before grants)
SEAI grant: Up to €12,500
🔹 Air-to-Air Heat Pumps
These extract heat from outdoor air and blow warm air directly into rooms through internal wall-mounted units. They do not heat water, so you will still need a separate system for hot water (such as an immersion heater or solar thermal).
They are cheaper to install than air-to-water systems and can also provide cooling in summer – our air-to-air heat pump guide covers costs, grants and suitability in detail. However, they are less common in Ireland because most homes use wet heating systems (radiators or underfloor heating).
Typical cost: Lower than air-to-water
SEAI grant: Up to €7,500 (€3,500 for the heat pump plus €4,000 renewable heat bonus)
🔹 Ground Source Heat Pumps
These extract heat from the ground using loops of pipe buried either in horizontal trenches or vertical boreholes in your garden. Because ground temperatures in Ireland remain relatively stable year-round (around 10-12°C), ground source heat pumps are slightly more efficient than air source systems – typically around 20% lower running costs.
The trade-off is higher installation costs and the need for sufficient outdoor space to lay the ground loop or drill a borehole.
Typical cost: €12,500 – €28,000 fully installed (before grants)
SEAI grant: Up to €12,500
🔹 Which Type Is Best for Irish Homes?
For most Irish homeowners, an air-to-water heat pump is the best option. It balances cost, efficiency and ease of installation. In Ireland’s mild climate, the difference in running costs between air source and ground source is relatively small compared to the difference in upfront cost.
Ground source makes more sense if you have plenty of outdoor space, a larger budget, and want the quietest possible system with the highest long-term efficiency.
💰 How Much Does a Heat Pump Cost in Ireland in 2026?
Here is a realistic breakdown of heat pump costs for a typical Irish home:
Hardware (heat pump unit + hot water cylinder + fittings): €5,500 – €13,000
Installation labour: €4,500 – €9,000
Total installed cost (before grants): €10,000 – €24,000
The median heat pump retrofit cost reported by SEAI in 2023 was approximately €14,868. Costs vary significantly depending on the brand, the size of your home, the complexity of the installation and whether you need additional work like new radiators or pipework upgrades.
You may also need insulation upgrades before installing a heat pump. Your home must meet a minimum Heat Loss Indicator (HLI) of 2.0 or below to qualify for the SEAI grant, and a well-insulated home is essential for the heat pump to work efficiently.
💚 SEAI Heat Pump Grants 2026 – Up to €12,500
From 3 February 2026, the SEAI heat pump grant has been significantly increased. The new maximum grant of €12,500 is made up of three components:
🌿 Up to €6,500 for the heat pump installation itself (€3,500 for air-to-air systems)
🌿 Up to €2,000 for central heating upgrades – new radiators, pipework or underfloor heating where required
🌿 €4,000 Renewable Heat Bonus for homeowners switching from oil, gas, solid fuel or electric storage heating to a heat pump
This means the out-of-pocket cost for a typical air-to-water heat pump installation could be as low as €0 to €11,500, depending on your total installation cost.
🔹 Who Is Eligible?
🌿 Your home must have been built and occupied before 2021
🌿 The property must have an MPRN (electricity meter point reference number)
🌿 The home must meet minimum insulation standards (HLI of 2.0 or below)
🌿 Homes built before 2007 require a Technical Assessment before applying
🌿 The work must be carried out by an SEAI-registered contractor
🌿 You must have grant approval before starting work
For full details on all available energy grants, see our complete SEAI grants guide.
🔹 How to Apply for the SEAI Heat Pump Grant – Step by Step
The application process is straightforward, but you must follow the steps in the right order. Starting work before grant approval will invalidate your application.
Step 1 – Get a BER assessment. If your home was built before 2007, you need a Technical Assessment carried out by a BER assessor. This confirms your current BER rating and Heat Loss Indicator. If your home was built between 2007 and 2020, you can skip straight to Step 2, but getting a BER done first is still a good idea so you know exactly where you stand.
Step 2 – Check your HLI. Your Heat Loss Indicator must be 2.0 or below before you can apply for the heat pump grant. If it is above 2.0, you will need to do insulation work first – see our section below on what to do if your home does not meet the HLI threshold.
Step 3 – Choose an SEAI-registered contractor. You must use a contractor from the SEAI’s registered list. They will survey your home, recommend the right heat pump size and type, and provide a quote. Get at least two or three quotes – prices vary significantly.
Step 4 – Apply online through the SEAI portal. Your contractor can submit the application on your behalf, or you can do it yourself through the SEAI’s online system. You will need your MPRN, your BER number and your contractor’s details.
Step 5 – Wait for grant approval. SEAI will confirm your grant offer in writing. Do not let your contractor start any work until you have this confirmation. Starting early means you will not get the grant.
Step 6 – Get the work done. Once approved, your contractor installs the heat pump. They must complete a Declaration of Works form confirming the installation meets SEAI standards.
Step 7 – Post-works BER. After installation, you need a new BER assessment to confirm the improvement. This is a requirement for grant drawdown – SEAI needs to verify that the upgrade has actually improved your home’s energy performance.
Step 8 – Claim your grant. Submit the Declaration of Works, your post-works BER certificate, and proof of payment to SEAI. The grant is paid directly into your bank account, typically within four to six weeks.
🔹 Stacking Grants – How to Get Over €20,000 Towards Your Energy Upgrade
The heat pump grant does not exist in isolation. You can combine it with other SEAI grants as part of a broader home energy upgrade, and the total available funding adds up quickly.
Here is what a realistic grant stack looks like for a homeowner doing a full upgrade on a semi-detached house in 2026:
🌿 Heat pump system grant: €6,500
🌿 Central heating upgrade grant: €2,000
🌿 Renewable heat bonus: €4,000
🌿 Cavity wall insulation: €1,700
🌿 Attic insulation: €1,500
🌿 Solar PV panels (up to 4kWp): €1,800
🌿 Windows and doors grant (new for 2026): up to €4,000
Total potential grants: over €21,500
If you go through a One Stop Shop provider and achieve a B2 BER rating or better, you may qualify for the One Stop Shop grant route instead, which covers up to 50% of the total cost of a deep retrofit. For larger projects costing €40,000 to €60,000, the 50% route can work out even more generous than stacking individual grants.
You can also layer on the Home Energy Upgrade Loan Scheme to cover whatever is left after grants. These government-backed loans range from €5,000 to €75,000 at rates from 2.99%, available through PTSB, AIB, Bank of Ireland, Avant Money and participating credit unions.
The key point is this: you do not have to do everything at once. SEAI allows a phased approach. You can do insulation this year, add a heat pump next year and install solar panels the year after, claiming separate grants each time. The only requirement is that each individual measure must meet SEAI’s standards.
For more on insulation grants and the full list of available amounts, see our retrofitting guide.
🔹 Additional Financial Supports
🌿 9% VAT rate on heat pump installations (reduced from 23% from January 2025)
🌿 Landlord tax relief – landlords can deduct up to €10,000 (net of grant) from rental income for retrofit works, on up to three properties from 2026 to 2028
🌿 One Stop Shop service – SEAI-registered companies that manage the entire upgrade process for you, with grants of up to 50% for deep retrofits achieving a B2 rating or better
📉 What Will a Heat Pump Save You on Energy Bills?
The savings depend on what you are replacing and how well your home is insulated. As a general rule, homeowners switching from an oil or gas boiler to a properly installed heat pump can expect heating bills to drop by around 40%.
Typical annual running costs for a heat pump in Ireland are between €500 and €1,000, depending on the size of your home, your insulation levels and your electricity tariff.
For comparison:
🌿 Oil heating: roughly €1,500 – €2,500 per year (and rising with carbon tax increases)
🌿 Gas heating: roughly €1,200 – €2,000 per year
🌿 Heat pump: roughly €500 – €1,000 per year
Several Irish electricity providers now offer special heat pump tariffs with cheaper nighttime rates, which can reduce running costs further. Electric Ireland’s Home Electric+ Night Boost plan is one example designed specifically for heat pump homes.
Combining a heat pump with solar PV panels is particularly effective. The solar panels generate free electricity during the day, which can power your heat pump and further reduce your bills. Both systems qualify for separate SEAI grants.
🏗️ Is Your Home Suitable for a Heat Pump?
Heat pumps work best in well-insulated homes. This is the single most important factor. If your home has poor insulation, a heat pump will have to work harder, run less efficiently and cost more to operate.
Here are the key considerations:
🔹 Insulation First – The Fabric First Approach
The “fabric first” approach is essential. Before installing a heat pump, make sure your home has adequate attic insulation, wall insulation (cavity or external), draught-proofing and reasonably efficient windows. SEAI requires a Heat Loss Indicator of 2.0 or below to qualify for the heat pump grant.
Homes built after 2011 typically meet this standard already. Homes built between 2005 and 2011 may be borderline. Homes built before 2005 will almost certainly need insulation upgrades first.
The good news is that SEAI offers separate grants for insulation, and the new 2026 grant rates are more generous than ever. You can do insulation now and add a heat pump later as a phased approach.
🔹 Understanding the Heat Loss Indicator (HLI) Threshold
The HLI is a number that measures how quickly your home loses heat, expressed in watts per square metre per degree Kelvin (W/m²K). The lower the number, the better insulated your home is.
To qualify for the SEAI heat pump grant, your home must have an HLI of 2.0 or below. This threshold exists for a good reason – a heat pump installed in a poorly insulated home will struggle to keep it warm, cost more to run and ultimately disappoint you.
Your HLI is calculated as part of a BER assessment. It takes into account wall insulation, attic insulation, window quality, draughtiness and overall building fabric. A BER assessor can tell you your exact HLI figure and what is dragging it up.
What if your HLI is above 2.0?
This is common, especially in homes built before the 2000s. You have two options:
🌿 Option 1 – Insulate first, then apply for the heat pump grant. This is the recommended approach. Do the insulation work (claiming SEAI insulation grants as you go), get a new BER assessment to confirm your HLI has dropped to 2.0 or below, then apply for the heat pump grant. Many homeowners spread this over two years.
🌿 Option 2 – Use the One Stop Shop route. If you go through an SEAI-registered One Stop Shop, they handle the entire process as a single deep retrofit project. The HLI threshold still applies, but the One Stop Shop will include the necessary insulation as part of the overall works, and you can access up to 50% grant funding on the total project cost.
The most common reasons for a high HLI are uninsulated or poorly insulated walls (especially solid walls in pre-1970s homes), single-glazed windows and missing or thin attic insulation. Cavity wall insulation alone can bring many 1980s and 1990s homes under the 2.0 threshold.
For a full breakdown of insulation grants and what each type costs, see our retrofitting guide.
🔹 Heating Distribution
Heat pumps produce heat at lower temperatures than oil or gas boilers. They work most efficiently with underfloor heating or oversized radiators. If your home has standard radiators, you may need to upgrade some of them to larger ones to get the best performance. The new €2,000 central heating upgrade grant helps with this cost.
🔹 Space Requirements
An air source heat pump needs space outside for the outdoor unit and indoor space for a hot water cylinder. Ground source systems need sufficient garden space for trenches or a borehole. Most semi-detached and detached homes in Ireland have enough space for an air source system.
🔹 BER Rating and the Post-Works Requirement
Installing a heat pump will significantly improve your home’s BER rating, which increases property value. 85% of homes built since 2020 already have heat pumps, and they almost all achieve an A rating. For older homes, a heat pump combined with insulation upgrades can lift a D or E rated home up to B2 or better.
There is also a practical requirement to be aware of: SEAI requires a post-works BER assessment after your heat pump is installed. This is not optional – it is a condition of the grant. The post-works BER confirms that the upgrade has genuinely improved your home’s energy performance and that the installation meets the required standard.
Your contractor should factor the cost of this post-works BER into their quote. It typically costs €150 to €300 and must be carried out by a registered BER assessor (not necessarily the same one who did your pre-works assessment, though using the same assessor can be simpler).
If the post-works BER shows your home has not improved as expected, it could indicate a problem with the installation. This is rare, but it is one reason to choose an experienced, SEAI-registered installer.
⏰ Ireland’s Heat Pump Targets – Where Are We?
Ireland’s Climate Action Plan targets 400,000 heat pump retrofits in existing homes by 2030, plus 280,000 heat pumps in new builds. That is 680,000 heat pump installations in total.
Currently, heat pumps are installed in around 13% of all BER-rated homes. In new builds from 2020 onwards, that figure is 85% – heat pumps are now standard in most new Irish homes.
But the retrofit rate is still well behind target. In 2025, just 4,360 homes drew down heat pump grants from SEAI. At that pace, Ireland would not hit the 400,000 retrofit target until 2042 – 12 years too late.
The massive increase in grants for 2026 is designed to accelerate this. The combination of up to €12,500 in grants, 9% VAT and low-cost loans means 2026 is genuinely the most affordable year yet to switch to a heat pump.
The heat pump market in Ireland was one of only three in Europe to grow in 2024, and the industry is scaling up rapidly. However, installer shortages remain a real challenge, so expect some waiting times if demand surges.
🌍 Heat Pumps and Climate Change
Residential heating accounts for a significant share of Ireland’s greenhouse gas emissions. Oil and gas boilers burn fossil fuels directly, producing CO₂ with every hour they run.
Heat pumps produce zero emissions on site. Their only energy input is electricity, and as Ireland’s electricity grid gets greener – wind energy already provides a third of Ireland’s power – the carbon footprint of running a heat pump continues to shrink.
Switching from oil to a heat pump is one of the single biggest steps any Irish household can take to reduce their contribution to climate change.
🔧 Running and Maintaining a Heat Pump
Heat pumps require relatively little maintenance compared to oil or gas boilers. An annual service costs around €70 – comparable to a boiler service – and there is no chimney to sweep, no fuel tank to fill and no carbon monoxide risk.
Key tips for running a heat pump efficiently:
🌿 Keep it running consistently – unlike an oil boiler, heat pumps work best when left on at a steady low temperature rather than being switched on and off
🌿 Use nighttime setback – program your heat pump to run a few degrees cooler overnight
🌿 Keep the thermostat sensible – 18-20°C is comfortable and efficient
🌿 Insulate well – the better your insulation, the less your heat pump has to work
🌿 Use a smart meter tariff – take advantage of cheaper night rates to heat water and boost heating
A well-maintained heat pump has a lifespan of around 20 years, and some last significantly longer.
❓ Frequently Asked Questions About Heat Pumps in Ireland
🔹 How much does a heat pump cost in Ireland?
A fully installed air-to-water heat pump typically costs €10,000 to €24,000 before grants. With the new SEAI grant of up to €12,500, the out-of-pocket cost can be as low as €0 to €11,500.
🔹 What is the SEAI heat pump grant for 2026?
The maximum SEAI heat pump system grant is €12,500 from February 2026. This includes €6,500 for the heat pump, €2,000 for central heating upgrades and a €4,000 renewable heat bonus when replacing a fossil fuel system.
🔹 Do heat pumps work in cold Irish winters?
Yes. Air source heat pumps work effectively in temperatures down to -15°C or lower. Ireland’s mild winters (typically 0-8°C) are well within their optimal range. Ground source heat pumps are even less affected by cold weather.
🔹 How much will I save on my energy bills?
Most homeowners switching from oil or gas save around 40% on heating costs. Typical annual running costs for a heat pump are €500 to €1,000, compared to €1,500 to €2,500 for oil.
🔹 Do I need to insulate my home first?
In most cases, yes. Your home needs a Heat Loss Indicator of 2.0 or below to qualify for the SEAI grant and to ensure the heat pump runs efficiently. Homes built before 2005 will almost certainly need insulation upgrades first. SEAI offers separate grants for insulation.
🔹 What happens if my HLI is above 2.0?
You will need to improve your insulation before applying for the heat pump grant. The most effective upgrades are wall insulation and attic insulation – cavity wall insulation alone brings many homes under the threshold. You can claim SEAI insulation grants for this work and then apply for the heat pump grant once your HLI is below 2.0. Alternatively, go through a One Stop Shop provider who will handle insulation and heat pump installation as a single project.
🔹 Can I combine a heat pump with solar panels?
Absolutely, and it is one of the smartest combinations available. Solar PV generates free electricity to power your heat pump during the day. Both qualify for separate SEAI grants – up to €12,500 for the heat pump and up to €1,800 for solar PV.
🔹 How much grant funding can I get in total?
If you combine heat pump, insulation, solar PV and the new windows and doors grant, total SEAI funding can exceed €21,500 for a single home. Going through the One Stop Shop route for a deep retrofit can provide up to 50% of the total project cost, which may be even more for larger projects.
🔹 Do I need planning permission for a heat pump?
No. Heat pump installations in Ireland are generally exempt from planning permission. The outdoor unit of an air source heat pump is classed as a permitted development.
🔹 What is the best type of heat pump for Ireland?
For most Irish homes, an air-to-water heat pump is the best balance of cost, efficiency and practicality. Ground source is worth considering if you have space and budget for the higher upfront cost.
🔹 Do I need a new BER after installation?
Yes. SEAI requires a post-works BER assessment as a condition of the grant. This confirms the heat pump has improved your home’s energy performance. Your contractor should include this in their quote – it typically costs €150 to €300.
📚 Related Guides
🌿 Air-to-Water Heat Pump Cost
🌿 Air-to-Air Heat Pumps
🌿 Heating Oil Prices
🌿 Heating Oil by County
🌿 HVO Fuel
🌿 Boiler Replacement Cost
🌿 Gas Boiler Service
🌿 Storage Heaters
🌿 Underfloor Heating
👉 All guides and calculators
Climate Jargon Buster is an independent resource providing plain-English information on climate, energy and sustainability topics for an Irish audience. Grant amounts and costs in this article are correct as of March 2026. For the latest official grant information, visit seai.ie. This site is not affiliated with SEAI – always check the official SEAI website for current figures and eligibility requirements.