Costs
How Much Does a New Boiler Cost in Ireland?
TL;DR
A combi boiler replacement in Ireland typically costs €2,200 to €3,500 fully installed. The SEAI Better Energy Homes grant reduces this by up to €1,800. Most installations are completed in one day.
What Does a New Boiler Cost in Ireland in 2026?
The total cost of a new gas boiler in Ireland depends on the boiler type, the brand, and whether any pipework or flue changes are needed. Based on current pricing for Meath and Leinster, here are the typical installed costs:
- Combi boiler replacement (like-for-like): €2,200 to €2,800
- Combi boiler with new flue or pipework changes: €2,800 to €3,500
- System boiler replacement: €2,500 to €3,200
- Back boiler to combi conversion: €2,500 to €3,800 (extra pipework required)
- Back boiler to system boiler with hot press cylinder: €3,000 to €4,200
SEAI Grants for Boiler Replacement
The SEAI Better Energy Homes scheme provides grants for home energy upgrades including heating system changes. For 2026, the relevant grants are:
Heat pump with underfloor heating: up to €6,500. Solar water heating: up to €1,200. Heating controls: €700. The scheme no longer offers a standalone gas boiler grant but heating controls, a solar thermal add-on, and attic insulation can all be combined with a boiler replacement to draw down multiple grants in one project.
Check current grant levels directly on the SEAI website before committing, as amounts are reviewed annually.
Which Boiler Brand Should I Choose?
Worcester Bosch, Viessmann, and Vaillant are the three brands most commonly recommended by independent gas engineers in Ireland. All three offer 10-year warranties when installed by a registered engineer and serviced annually. Worcester Bosch is typically the most widely available for parts and servicing. Viessmann and Vaillant are considered premium brands with strong efficiency ratings.
What Is Included in a Boiler Installation?
- Removal and disposal of the old boiler
- Supply and fit of the new boiler
- New flue if needed, or connecting to existing flue
- Magnetic filter installation
- System flush
- Commissioning to manufacturer specification
- Gas safety certificate (legally required)
- Warranty registration
Back Boiler Replacement in Ireland
A back boiler (a gas boiler fitted behind a fireplace) cannot simply be swapped like-for-like because combi boilers require a different flue and pipe layout. Converting from a back boiler to a combi typically costs €2,500 to €3,800 depending on how much pipework needs to move. The savings in fuel costs and reduced maintenance usually pay back the extra installation cost within 5 to 7 years.
How to Get the Best Price on a Boiler in Ireland
- Get at least two written quotes from RGI-registered engineers
- Compare installed prices, not just boiler prices, installation costs vary significantly
- Check SEAI grant eligibility before buying
- Ask what the quote includes: old boiler removal, magnetic filter, gas safety cert, and warranty registration should all be included
- Avoid engineers who cannot provide an RGI certificate number
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Boiler Installation, quoted before work starts.
Costs
Frequently asked questions
How long does a boiler last in Ireland?
A well-maintained gas boiler should last 12 to 15 years. Annual servicing and a magnetic filter significantly extend this. A boiler over 15 years old is likely to need replacement within the next few years regardless of condition.
Is a combi boiler better than a system boiler?
For most Irish homes without a high simultaneous hot water demand, a combi boiler is more efficient and cheaper to install because it does not need a hot water cylinder. A system boiler with a cylinder is better for larger homes where two or more showers run at the same time.
Do I need an RGI engineer for boiler installation in Ireland?
Yes. Under Irish law, all gas work must be carried out by a RGII register-registered engineer. Installing a boiler without a registered engineer is illegal and will void the boiler warranty and any home insurance claims related to the installation.
How long does a boiler installation take?
A straightforward combi boiler replacement is typically completed in 4 to 6 hours. A back boiler conversion can take a full day or sometimes two days if significant pipework changes are needed.
Is there VAT on boiler installation in Ireland?
Yes. Boiler installation labour and materials are subject to the standard VAT rate of 23% in Ireland. Some qualifying energy-saving equipment may attract a reduced rate, check current Revenue guidance.
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