Cost guide · Verified May 2026
Heat pump cost in Ireland — full price + SEAI grant + payback
A full air-to-water heat pump installation in Ireland typically costs €9,000–€18,000. The SEAI bundle grant of up to €12,500 brings the net cost to €4,000–€12,000 for most homes, with a 7–12 year payback against oil or electric heating.
What you actually pay for
A heat pump install is not just the unit — it usually requires a new hot water cylinder, and many homes need radiator or underfloor heating upgrades because heat pumps run at lower flow temperatures than oil/gas boilers.
| Component | Typical cost |
|---|---|
| Air-to-water heat pump unit | €3,000–€7,000 |
| Installation + pipework | €2,000–€5,000 |
| Hot water cylinder (if needed) | €800–€1,500 |
| Radiator/UFH upgrade (if needed) | €1,500–€4,000 |
| Heating controls (often combined) | €500–€1,200 |
Not all components apply to every home — eligibility depends on dwelling type and works.
Worked example · 3-bed semi replacing oil
Net cost after the SEAI grant
- Gross cost
- €14,000
- SEAI grant
- −€12,500
- You pay
- €1,500
€14k mid-range install with radiator upgrade, full €12,500 bundle (unit €6,500 + central heating €2,000 + €4,000 renewable heat bonus for replacing oil). Apartments cap at €9,500 on the grant.
Payback period
vs Oil heating
7–9 years. Oil is the most expensive heating fuel in Ireland; typical annual savings are €1,200–€2,000 on a 3-bed semi.
vs Gas heating
10–14 years. Gas is cheaper to run, so the savings are smaller. The carbon and future-proofing case is stronger than the bill case.
vs Electric heating
Under 7 years. Direct electric heating is the most expensive on a per-kWh-of-heat basis; switching to a heat pump (3–4× more efficient) pays back fastest here.
These paybacks assume the home is well-insulated (B2 BER or better). In a poorly-insulated home the heat pump falls back on expensive auxiliary heat and the economics fall apart. Do fabric first, then the heat pump.
Common questions
- How much does a heat pump cost in Ireland in 2026?
- A typical air-to-water heat pump installation in a 3–4 bed semi-detached home costs €9,000–€18,000 inclusive of unit, installation, pipework, hot water cylinder, and any required heating distribution upgrade (larger radiators or underfloor heating). The SEAI grant of up to €12,500 brings the net cost to €4,000–€12,000 for most homes.
- What does the €12,500 SEAI heat pump grant cover?
- The €12,500 bundle is made up of: €6,500 for the heat pump unit, €2,000 for central heating distribution upgrades, and a €4,000 renewable heat bonus when replacing a fossil-fuel or electric heating system. Not every home qualifies for all three components — apartments are capped at €9,500.
- What is the payback period for a heat pump?
- Payback vs oil heating is typically 7–9 years (oil is the most expensive system to run, so savings are highest). Vs gas heating: 10–14 years (gas is cheaper, so savings are smaller). Vs electric heating: usually <7 years. These assume good fabric — a poorly-insulated home runs the heat pump on auxiliary electric heat and ruins the economics.
- Do I need to insulate before installing a heat pump?
- Yes, in practice. Heat pumps run at lower flow temperatures than gas/oil boilers — a leaky home with poor insulation either struggles to stay warm or falls back on expensive auxiliary heat. SEAI recommends "fabric first": attic + wall insulation before the heat pump. The pre-installation technical assessment (required for the grant) will confirm whether your home is suitable.
- What's the running cost of a heat pump vs gas/oil?
- A well-installed heat pump in a B2-rated home typically runs at €500–€900/year for space heating + hot water — about 30–50% cheaper than oil and roughly similar to or slightly cheaper than gas at 2026 prices. The bigger benefit is that running costs are stable rather than tied to fossil-fuel price spikes.
See your exact grant amount
The navigator works out your specific heat-pump bundle based on dwelling type, current heating, and BER. 3 minutes, no sign-up.
Run the navigatorIndicative figures based on typical Irish market averages and SEAI-published grant rates. Final cost depends on dwelling size, existing heating system, insulation level, and contractor. Always get 3 quotes from SEAI-registered installers.