How Much Does a Boiler Replacement Cost in Ireland?
Replacing an old or inefficient boiler is one of the most impactful home improvements you can make in Ireland — both for comfort and energy costs. With SEAI grants available, the net cost can be significantly lower than the headline price.
These figures are researched Irish market estimates for budgeting. Costs vary by project scope, materials and county; get at least three written quotes before starting work.
Typical heating & boiler engineers costs
- Gas combi boiler replacement: €2,000–€3,500 — Supply and fit, like-for-like replacement
- Oil boiler replacement: €2,500–€4,500 — Supply and fit, new flue if required
- Heat pump installation (air to water): €10,000–€18,000 — Before SEAI grant (up to €6,500 available)
- Heat pump installation (after grant): €3,500–€12,000 — Varies by house type and insulation level
- Boiler service: €80–€150 — Annual service recommended
- Power flush (radiator system): €400–€800 — Clears sludge from system
What affects the cost?
- Type of boiler — gas, oil, or heat pump have very different cost profiles
- Whether new flue work or pipework is required
- Insulation levels in your home — heat pumps require well-insulated homes to be efficient
- SEAI grants — significant grants available for heat pumps and certain upgrades
- System size — larger homes need higher output boilers which cost more
- Brand and warranty — premium brands cost more but offer longer guarantees
Tips before hiring
- Check SEAI.ie for the latest grants before proceeding with any heating upgrade
- Your heating engineer must be RGII registered to work on gas systems
- An annual boiler service extends lifespan and maintains efficiency
- Consider whether a heat pump is viable — your home needs good insulation first
Frequently asked questions
- What SEAI grants are available for boiler replacement in Ireland? SEAI offers grants of up to €6,500 for air-to-water heat pumps and up to €4,500 for oil-to-heat pump conversions. Grants are also available for insulation upgrades which are often needed alongside a heat pump. Visit seai.ie for current grant levels.
- How long does a boiler replacement take? A like-for-like gas or oil boiler replacement typically takes 1–2 days. A full heat pump installation is a larger project that can take 2–5 days, including new radiators if required.
- How long does a boiler last in Ireland? A well-maintained gas or oil boiler typically lasts 10–15 years. Heat pumps generally last 15–20 years. Regular servicing significantly extends the life of any heating system.