Heat Pumps Ireland — Cost, Grants & Is It Right for Your Home | Parce

What is a heat pump and how does it work?

A heat pump doesn't generate heat — it moves it. The outdoor unit extracts heat energy from the outside air and transfers it into your home via a refrigerant circuit. The same principle a fridge uses in reverse: instead of pushing heat out, a heat pump pulls it in.

The most common type in Ireland is an air-to-water heat pump. It heats water that circulates through your radiators or underfloor heating, and also heats your domestic hot water cylinder. Ground-source heat pumps (which extract heat from the ground via buried pipes) are more efficient but require significantly more space and cost — most Irish homes use air-to-water.

Heat pumps are designed to work in cold weather. Modern units operate efficiently down to -15°C. They work best in well-insulated homes — not because they fail in poor insulation, but because every degree of heat that leaks out needs to be replaced, and heat pumps work at lower temperatures than oil boilers. A leaky house costs more to run on any heating system.

Up to €6,500

SEAI heat pump grant

For homes built before 2011, using a registered SEAI contractor.

€10,000–€18,000

Typical installed cost

Before grant. Depends on home size, system type, and whether radiators need upgrading.

−15°C

Operating temperature

Modern air-to-water heat pumps work efficiently in Irish winters.

Does a heat pump work in Ireland's climate?

Yes — and Ireland's climate is actually well-suited to heat pumps. The country's mild maritime weather means winters are rarely severe by European standards. The average Irish winter temperature rarely drops below 2–4°C in most of the country — well within the efficient operating range of a modern heat pump.

For comparison: Germany, Denmark, Norway, and Sweden — all with significantly colder winters than Ireland — have much higher rates of heat pump adoption. Cold weather is not the barrier.

The honest caveat: heat pumps work best in homes with good insulation and low-temperature heating systems. If your home has older high-temperature cast-iron radiators designed for an oil boiler, you may need to upgrade some radiators alongside the heat pump installation. Your installer should assess this as part of their survey. A BER rating of C or better is generally recommended before installing — see parce.ie/ber to understand where your home stands.

What does a heat pump cost in Ireland?

A supply-and-install air-to-water heat pump typically costs €10,000–€18,000 before the SEAI grant. The range is wide because it depends on your home's size, whether your existing radiators need upgrading to low-temperature versions, and local installer pricing.

What you're paying for

The heat pump unit

The outdoor unit and indoor controller — the core of the system. Sized in kilowatts (kW) based on your home's heat loss. Getting this right matters: undersized means the system struggles in cold weather; oversized means inefficient cycling.

Installation labour

Pipework, electrical connections, integration with your hot water cylinder, and commissioning. The most variable cost — prices differ significantly between installers and regions.

Hot water cylinder

A larger, well-insulated cylinder suited to heat pump operation. Usually included in the main installation quote — confirm this when comparing quotes.

Radiator upgrades

Heat pumps operate at lower flow temperatures than oil boilers. If your existing radiators are undersized for lower-temperature operation, they may need replacing or supplementing with larger panels. Not always required — your installer should assess this.

Underfloor heating (if retrofitting)

If you want to add underfloor heating — which pairs very well with a heat pump — budget an additional €5,000–€12,000 for a full retrofit. Not required; most retrofits use upgraded radiators instead.

Grant application

An SEAI-registered installer handles the grant application on your behalf. The grant comes off the final invoice — you pay the net amount. You cannot claim the grant after the fact if you used a non-registered installer.

The SEAI heat pump grant

The SEAI grant for a heat pump is up to €6,500 (confirmed April 2026). This is one of the larger grants in the Better Energy Homes scheme.

Key eligibility conditions:

Home must have been built before 2011
You must use an SEAI-registered contractor — grant cannot be claimed after the fact
Grant is paid directly to the contractor; you pay the net amount
Cannot be combined with the Warmer Homes Scheme (that's a separate, income-based programme for households on certain social welfare payments — covered on parce.ie/grants)

The One Stop Shop option is worth knowing about: SEAI can coordinate your full home energy upgrade — assessment, insulation works, and heat pump installation — as a single managed programme. If your home needs multiple upgrades before a heat pump makes sense, this can simplify the process considerably. See parce.ie/grants for details.

SEAI heat pump grant — full details at seai.ie →

Heat pump vs oil boiler — an honest comparison

There's a lot of marketing noise around heat pumps. Here's a straightforward assessment.

Running costs

Heat pumps are typically cheaper to run than oil boilers over the long term — but this depends on your electricity tariff and home insulation. With a well-insulated home and a good tariff, savings are meaningful. In a poorly insulated home on a standard electricity rate, the savings are smaller.

Upfront cost

A heat pump — even after the €6,500 SEAI grant — is a bigger upfront investment than replacing a like-for-like oil boiler. The economics are long-term, not immediate. If you're replacing a boiler that has years left in it, the maths only works if you're staying in the house long enough to see the payback.

Fossil fuel independence

A heat pump runs entirely on electricity. Once you're off oil, you're no longer exposed to kerosene price volatility — which has been considerable. If you also have solar panels, you're generating some of the electricity your heat pump uses. That's the combination that makes the economics most compelling.

Comfort and heat delivery

Heat pumps heat more slowly and consistently than oil boilers. Instead of blasting rooms to temperature and cycling off, they maintain a steady background warmth. Most people find this comfortable — but it's a different experience from a high-temperature oil system. Underfloor heating pairs particularly well with this steady, low-temperature approach.

Planning permission

Air-to-water heat pumps are generally exempt development in Ireland — you don't need planning permission in most cases. Exceptions apply for protected structures and some Architectural Conservation Areas. Confirm with your SEAI-registered installer before proceeding.

Maintenance

Heat pumps have fewer moving parts than oil boilers, no annual fuel delivery to organise, and typically lower maintenance requirements. Annual servicing is still recommended — but there's no oil filter to change, no flue to clean, and no risk of running out of fuel.

Is your home suitable for a heat pump?

Most Irish homes can have a heat pump installed — but these factors determine how smoothly it goes and how well it performs.

→BER rating C or better — or willing to upgrade insulation first (attic and cavity wall are the priority)
→Adequate external space for the outdoor unit — approximately 1m × 0.5m, with clear airflow around it
→Standard single-phase electricity supply — sufficient for most residential heat pump installations
→Radiators are compatible with lower flow temperatures — or budget is available to upgrade undersized radiators
→Planning permission not required in most cases — confirm with your SEAI-registered contractor if you're in a protected structure or conservation area
→Home built before 2011 — required for the SEAI grant (homes built after 2011 may still install a heat pump, but won't qualify for the current grant scheme)

How to find a heat pump installer

You must use an SEAI-registered contractor to qualify for the grant — this is non-negotiable. Using an unregistered installer means losing the €6,500 grant entirely.

The SEAI maintains a public register of approved heat pump contractors. Check it before agreeing to anything — not just the installer's word that they're registered.

Get at least three quotes. Heat pump installation pricing varies significantly across Ireland — sometimes by thousands of euros for the same job. Three quotes takes some time but can make a real difference to the final cost.

Questions to ask every installer:

What kW output do you recommend for my home, and how did you calculate it?
Will my existing radiators work at lower flow temperatures, or do any need replacing?
What does the installation include — cylinder, controls, commissioning?
Are you SEAI-registered, and will you handle the grant application?
What is your workmanship warranty?
Can you give me two or three references from recent installs in this county?

We're building a verified heat pump installer network across Ireland. Email hello@parce.ie if you can recommend a reliable installer in your area.

SEAI registered heat pump contractors →

Common questions about heat pumps in Ireland

What Irish homeowners most often want to know before making a decision.

How much does a heat pump cost in Ireland after the SEAI grant?▾

A typical air-to-water heat pump installation costs €10,000–€18,000 before the SEAI grant. After the maximum €6,500 grant, the net cost is roughly €3,500–€11,500 depending on home size, whether radiators need upgrading, and installer pricing. The wide range is real — get three quotes from SEAI-registered installers before committing. The grant is paid directly to the contractor; you pay the net amount on the final invoice.

Does a heat pump work in old Irish houses?▾

Yes, with some caveats. Older houses often have poor insulation and high-temperature radiator systems designed for oil boilers. A heat pump can be installed in these homes, but it may perform less efficiently if the insulation isn't upgraded first — and some radiators may need replacing to handle lower flow temperatures. A BER assessment will tell you exactly where your home stands and what upgrades would make the biggest difference. SEAI grants are available for insulation works alongside the heat pump grant.

Do I need planning permission for a heat pump in Ireland?▾

Generally no. Air-to-water heat pumps are considered exempt development under Irish planning regulations in most cases, meaning no planning application is needed. Exceptions apply for protected structures and some Architectural Conservation Areas. Your SEAI-registered installer should confirm this as part of their initial survey. If you're in any doubt, check with your local planning authority before proceeding.

How long does a heat pump installation take?▾

A straightforward installation — heat pump unit, cylinder, controls, and commissioning — typically takes 2–4 days. If radiator upgrades are also required, add another day or two. If underfloor heating is being retrofitted as part of the job, the project will take longer. Your installer should give you a clear timeline as part of their quote.

Is a heat pump cheaper to run than oil?▾

In most cases, yes — but it depends on your electricity tariff and home insulation. Heat pumps generate 3–4 units of heat for every unit of electricity consumed (this is called the Coefficient of Performance, or COP). At current Irish electricity prices and oil prices, a well-insulated home with a heat pump typically has lower annual running costs than the same home on oil. The gap narrows if your insulation is poor or your electricity tariff is high. If you also have solar panels generating some of your electricity, the running costs drop further.

Can I get a heat pump grant if I already have solar panels?▾

Yes. The SEAI heat pump grant and the Solar PV grant are separate schemes and can be claimed independently. Having solar panels installed does not affect your eligibility for the heat pump grant, and vice versa. In fact, combining solar panels with a heat pump is one of the most effective combinations — your panels generate electricity during the day that your heat pump can use, reducing the amount you draw from the grid.

Heat Pumps Ireland — Cost, Grants & Suitability Guide