Air-to-Water Heat Pump Cost in Ireland (2026)
Air-to-water heat pump costs in Ireland, including installation pricing, system components, SEAI grant impact and the upgrades that most affect total project cost.
Typical installed cost: €12,000–€24,000 before grant
Air-to-Water Heat Pump Costs in Ireland
Air-to-water heat pumps are the most common residential heat pump type in Ireland. They use outside air to heat water for radiators, underfloor heating and domestic hot water.
Typical installed cost is €12,000–€24,000 before SEAI support. After grant support, net homeowner cost commonly falls around €8,500–€18,000 depending on property size and required upgrades.
House size, heat-pump capacity, insulation, heat emitters and electrical work are the main cost variables.
Typical Installed Cost by Property
Small house / apartment: €12,000–€15,000
Semi-detached: €15,000–€19,000
Detached: €18,000–€24,000+
These figures generally include the heat pump, hot-water cylinder, controls, basic installation and commissioning.
System Size & What Is Included
Typical Heat Pump Sizes
5–7 kW: small houses / apartments
8–10 kW: typical semi-detached homes
11–14 kW: larger detached homes
Correct sizing should be based on a heat-loss calculation.
Base Installation Usually Includes
Outdoor unit, cylinder, controls and thermostats, standard pipework and fittings, installation labour and commissioning.
Radiator replacement, underfloor heating, major insulation upgrades and electrical-board work may be additional.
Main System Component Costs
| Component | Typical Cost |
|---|---|
| Outdoor heat pump unit | €5,000–€9,000 |
| Hot water cylinder | €1,200–€2,500 |
| Buffer tank, if required | €500–€1,200 |
| Controls & thermostats | €300–€900 |
| Pipework & fittings | €500–€1,500 |
| Installation labour | €3,000–€6,000 |
The size and complexity of the installation determine where a project falls within these ranges.
SEAI Grant Impact
The source page lists a €4,500 grant for apartments and €6,500 for mid-terrace, semi-detached/end-terrace and detached houses.
A semi-detached system priced at €18,000 falls to €11,500 after a €6,500 grant.
Grant approval and technical eligibility should be confirmed before installation.
Worked Project Examples
Semi-Detached House
| Item | Amount |
|---|---|
| System cost | €17,500 |
| SEAI grant | €6,500 |
| Net cost | €11,000 |
| 7% contingency | €1,225 |
| Total planning allowance | €12,225 |
Detached House
| Item | Amount |
|---|---|
| System cost | €22,000 |
| SEAI grant | €6,500 |
| Net cost | €15,500 |
| 7% contingency | €1,540 |
| Total planning allowance | €17,040 |
Upgrades, Timeline & Regional Pricing
Common Additional Upgrades
Radiators: €1,500–€4,000
Underfloor retrofit: €4,000–€10,000
Electrical board: €500–€1,200
Installation Timeline
Most on-site installations take 2–4 days.
Survey and heat-loss calculation usually take 1–2 weeks before installation.
Commissioning is normally completed the same day as final setup.
Regional Variation
Installation pricing can vary by around 5%–15%.
Labour costs tend to be higher in Dublin and commuter-belt counties.
Equipment pricing is generally more consistent nationwide.
Summary
Air-to-water heat pumps typically cost €12,000–€24,000 before grant.
After grant support, net homeowner cost commonly falls around €8,500–€18,000.
Heating-system upgrades are the biggest additional cost risk, so radiator, insulation and electrical requirements should be identified before comparing installer quotes.
Other resources:
SEAI Heat Pump Grant Explained
Required Upgrades – Before Installation
Radiators vs Underfloor Comparison
BER Requirements for Eligibility