Why Switch to a Heat Pump?
A heat pump extracts heat from the outside air (or ground) and uses it to heat your home and hot water. Even when it's cold outside, there's usable energy in the air, a modern heat pump works efficiently down to -20°C.
For every 1 kWh of electricity a heat pump uses, it produces 3–4 kWh of heat. That's 300–400% efficiency, compared to a gas boiler at 90% or an oil boiler at 85%. This dramatically reduces your heating costs and carbon emissions.
The €12,500 Grant. How It Works
From 3 February 2026, SEAI nearly doubled the heat pump grant. The new bundled grant includes three components covering the full system upgrade, not just the heat pump unit itself.
Get the free 2026 SEAI Grant Summary Card
Every grant on one printable page. Updated for the Feb/March 2026 changes.
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| Component | Houses | Apartments | What It Covers |
|---|---|---|---|
| Heat pump unit | €6,500 | €6,500 | Air-to-water heat pump supply & installation |
| Central heating upgrade | €2,000 | €2,000 | New radiators, underfloor heating, pipework |
| Renewable heat bonus | €4,000 | €1,000 | Bonus for switching from fossil fuel |
| Total maximum | €12,500 | €9,500 |
If you already submitted a heat pump grant application before February 2026 and haven't yet received payment, you'll automatically receive the higher grant amount. No need to reapply.
Air-to-air heat pumps
Air-to-air heat pumps (which heat rooms directly without radiators) qualify for a lower grant: up to €3,500 for the unit plus the €4,000 renewable heat bonus = €7,500 maximum for houses. These are less common in Ireland but can suit certain properties.
Eligibility
Your home must have been built and occupied before 2021. You must use an SEAI-registered contractor. A technical assessment (€200 grant available) may be required for pre-2007 homes to confirm suitability. Both homeowners and landlords are eligible.
Types of Heat Pumps
Air-to-Water
- Most popular in Ireland (90%+ of installs)
- Heats radiators, underfloor, and hot water
- No drilling or excavation needed
- Outdoor unit + indoor cylinder
- COP 3.0–4.0 (300–400% efficient)
- Works in Irish climate year-round
Ground Source
- Slightly higher efficiency (COP 3.5–4.5)
- No visible outdoor unit
- Requires garden space for ground loops
- Higher installation cost
- Extremely quiet operation
- Best for rural properties with land
Air-to-Air
- Heats rooms directly (no radiators)
- Also provides cooling in summer
- Lower grant (€7,500 max)
- Doesn't heat water
- Can suit apartments or specific rooms
- Lower installation disruption
What Does a Heat Pump Actually Cost?
The total cost depends on your home's size, how much of your existing heating system needs upgrading, and the type of heat pump. Here are realistic 2026 figures:
| Home Type | Typical Total Cost | After €12,500 Grant |
|---|---|---|
| 2-bed terrace / apartment | €10,000–€14,000 | €0–€4,500 |
| 3-bed semi (typical) | €14,000–€18,000 | €1,500–€5,500 |
| 4-bed detached | €16,000–€22,000 | €3,500–€9,500 |
| Large detached (200m²+) | €20,000–€28,000 | €7,500–€15,500 |
Government-backed retrofit loans from 2.99% APR are available through AIB, Bank of Ireland, PTSB, and participating credit unions. A €10,000 loan at 2.99% over 10 years costs approximately €97/month, often less than what you're currently spending on oil. See financing options →
Running Costs. How Much Will You Save?
A heat pump’s running costs depend on electricity prices and the system’s efficiency (COP). Here’s how it compares to oil and gas for heating a typical 3-bed semi:
| Heating System | Annual Fuel Cost | CO² Emissions | Comfort |
|---|---|---|---|
| Oil boiler | €2,000–€2,800 | High | Good |
| Gas boiler | €1,600–€2,200 | Medium-High | Good |
| Electric storage heaters | €2,500–€3,500 | Medium | Poor |
| Air-to-water heat pump | €800–€1,400 | Low | Excellent |
| Heat pump + solar PV | €400–€800 | Very Low | Excellent |
Homeowners switching from oil typically save €1,000–€1,500 per year. Those switching from electric storage heaters save even more. Combining a heat pump with solar panels creates the ultimate combo, solar powers the heat pump during the day, dramatically reducing electricity costs.
Why the savings are so large
The key metric is the Coefficient of Performance (COP). A heat pump with a COP of 3.5 produces 3.5 units of heat for every 1 unit of electricity it consumes. The seasonal version. SCOP, averages performance across the whole year, accounting for colder months. A good air-to-water heat pump in Ireland achieves an SCOP of 3.0–3.5, meaning it’s 300–350% efficient across the year. An oil boiler, by contrast, converts fuel to heat at around 85–90% efficiency, and that’s for a modern condensing model. Older non-condensing oil boilers run at just 65–75% efficiency, meaning a third of your oil spend goes up the chimney.
In practical terms: if your home needs 15,000 kWh of heat per year (typical for a 3-bed semi), an oil boiler at 80% efficiency uses around 18,750 kWh of oil (about 1,875 litres at €1.10/litre = €2,060). A heat pump at COP 3.5 uses around 4,285 kWh of electricity (at €0.28/kWh = €1,200). That’s a saving of €860 per year, and it grows as oil prices rise.
Smart tariffs and night rates
Heat pumps pair brilliantly with smart electricity tariffs. Many Irish suppliers now offer time-of-use pricing with rates as low as €0.10–€0.15/kWh during off-peak hours (typically 11pm–8am). Since heat pumps can be set to pre-heat your home and hot water cylinder overnight, you can shift a significant portion of your electricity usage to these cheaper rates.
If you have a smart meter (MCC12/MCC16), ask your supplier about heat pump-specific plans. Electric Ireland, SSE Airtricity, and Bord Gáis all offer smart tariffs with discounted off-peak windows. The combination of a heat pump running primarily on night-rate electricity can reduce annual heating costs to under €700.
Maintenance costs
Heat pumps need annual servicing, but it’s simpler and cheaper than a boiler service. A typical heat pump service costs around €70–€100 per year, compared to €80–€120 for an oil boiler service. There are no fuel deliveries, no fuel tank maintenance, and no risk of fuel leaks. Most quality heat pump brands offer warranties of 5–10 years, and the outdoor unit typically lasts 20–25 years with proper maintenance.
Common Myths About Heat Pumps in Ireland
“Heat pumps don’t work in the Irish climate”. This is the most persistent myth and it’s completely wrong. Air source heat pumps extract heat from air at temperatures as low as −15°C to −20°C. Ireland’s winter temperatures rarely drop below 0°C, which is actually ideal for heat pump efficiency. Scandinavian countries with much colder winters than Ireland have been using heat pumps as their primary heating source for decades.
“They’re too noisy”. Modern heat pumps operate at around 40–50 dB at 1 metre distance, roughly the volume of a quiet conversation or a modern fridge. Planning rules in Ireland require the outdoor unit to be placed at least 0.5 metres from a boundary, and most installers recommend positioning it away from bedroom windows. In practice, you’re unlikely to hear it from inside your home.
“My radiators won’t work with a heat pump”. It depends. Heat pumps operate at lower water temperatures (35–50°C) than oil or gas boilers (60–80°C). If your radiators are generously sized, as they often are in older Irish homes, they may work fine. If not, you might need to upgrade some radiators to larger ones or add a few extra. This is covered by the €2,000 radiator/pipework element of the €12,500 grant. Your technical assessor will advise on what’s needed for your specific home.
“You need underfloor heating”. Underfloor heating works beautifully with heat pumps because it operates at low temperatures, but it’s absolutely not required. The vast majority of heat pump installations in Ireland use existing radiators (sometimes upsized) and work perfectly well. Underfloor heating is more common in new builds where it can be installed during construction.
“It takes too long to heat the house”. Heat pumps work differently from boilers. Instead of blasting heat for an hour morning and evening, they maintain a gentle, consistent temperature around the clock. This “set and forget” approach actually feels more comfortable, your home stays at a steady 20–21°C rather than swinging between 16°C and 23°C. The key is proper insulation: a well-insulated home with a heat pump stays warm with minimal effort.
Do I Need to Insulate First?
Heat pumps work best in well-insulated homes. Unlike a gas boiler that can blast heat quickly, a heat pump delivers gentle, consistent warmth, which means your home needs to retain that heat effectively.
SEAI recommends insulating before installing a heat pump. A well-insulated home allows you to install a smaller, less expensive heat pump that runs more efficiently. The recommended approach is: attic insulation first, then walls, then the heat pump.
Insulation requirements
To qualify for the heat pump grant, your home must meet certain fabric performance standards. Your Technical Assessment (mandatory before installation) will confirm whether your insulation is adequate. In practice, most homes need at least attic insulation to a depth of 300mm and some form of wall insulation. If your home already has decent insulation from a previous upgrade or was built after the 1990s with cavity fill, you may already qualify.
If insulation upgrades are needed, the good news is that these qualify for their own separate SEAI grants, attic insulation grants cover up to €2,000 and wall insulation grants cover up to €8,000 depending on your home type. You can claim the insulation grants first, then apply for the heat pump grant as a second step. See our full insulation guide →
What about older homes?
Homes built before the 1970s present the most challenges for heat pump installation, they typically have solid walls (no cavities), minimal or no attic insulation, and single-glazed windows. These homes need the most work before a heat pump makes sense, but they also stand to benefit the most from upgrading. A full fabric upgrade (external wall insulation, attic insulation, and new windows) followed by a heat pump can take these homes from G or F-rated energy disasters to comfortable A or B-rated homes. The One Stop Shop route is often the best path for these properties, with grants covering up to 50% of the total project cost.
From 2026, One Stop Shop installations no longer require a minimum BER uplift when installing a heat pump. This makes it easier for homes that are already partially upgraded to get a heat pump through the One Stop Shop route.
How to Get a Heat Pump. Step by Step
Get a BER assessment
Understand your home's current energy rating and what insulation is needed before a heat pump. The Advisory Report is your roadmap. Book a BER with Homerating.ie →
Insulate first (if needed)
Address any insulation gaps, attic, walls, windows. This maximises your heat pump's performance and may qualify for separate SEAI grants. Insulation guide →
Get quotes from SEAI-registered installers
Get at least 2–3 quotes from SEAI-registered heat pump contractors. They should assess your home, recommend the right system size, and include all pipework and radiator upgrades in the quote.
Apply for the SEAI grant
Apply online at seai.ie before any work begins. Approval is usually immediate. Do not start work until you receive your grant offer.
Installation (3–5 days)
Installation typically takes 3–5 days for a full system including radiator upgrades. Your installer handles the commissioning and handover.
Post-works BER and payment
A BER assessment after installation confirms the improvement. SEAI won't pay without it. Book your assessor before the work finishes to avoid delays. Homerating.ie covers Dublin and surrounding counties with fast turnaround. SEAI pays within 4–6 weeks of receiving all documentation.
You must receive written SEAI grant approval before any work begins. Starting work before approval permanently disqualifies you from the grant. This is the single most common and expensive mistake homeowners make.