Boiler installation Ireland: RGII-registered engineers
Find a registered gas engineer for combi boiler installation, system boiler replacement or heat pump installation across all 26 Irish counties. SEAI grants available. Supply and fit or fit-only.
Boiler replacement in Ireland: what the law requires
All gas boiler installation work in Ireland must be carried out by an RGII-registered engineer. This is a legal requirement under the Gas Safety (Installation and Use) (Amendment) Regulations. An unregistered installer cannot certify the work, your home insurance may be invalidated, and the installation cannot be included in a BER certificate.
How long does boiler installation take in Ireland?
A like-for-like combi boiler replacement takes one working day. Switching boiler type from a back boiler to a combi, or from a conventional to a system boiler, takes two days and requires additional pipework. Heat pump installations take two to three days and require underfloor heating or large-panel radiators for full efficiency.
SEAI grant for boiler replacement Ireland 2026
The SEAI Better Energy Homes scheme offers up to €2,000 for oil boiler replacement and up to €6,500 for heat pump installation. Work must be carried out by an SEAI-registered contractor. Engineers listed on plumbersinireland.ie who carry SEAI registration are clearly tagged on their profiles.
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Gas boiler installation Ireland: which type is right for your home?
Combi boiler
Heats water on demand with no cylinder needed. Ideal for homes under 130 sq m and the most popular choice for Irish houses and apartments. Supply and fit from €2,200.
System boiler
Works with a hot water cylinder. Better for larger homes with multiple bathrooms and high hot water demand. Suitable for solar water heating. From €2,800.
Heat pump
Replaces your boiler entirely. SEAI grant of €6,500 available in 2026. Best suited to well-insulated homes with a BER of B2 or better. From €12,000 before grant.
Oil boiler
For homes off the gas network. Modern condensing oil boilers are over 90% efficient. SEAI grants available for replacement with a heat pump or solar thermal system. From €3,000.
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Boiler installation cost Ireland 2026: typical prices by job type
Prices below are typical ranges for 2026 based on like-for-like replacements. Switching boiler type adds pipework cost. All figures include labour and VAT at 9% (the reduced rate for energy-efficient heating upgrades).
| Job type | Typical cost | Notes |
|---|---|---|
| Combi boiler, supply and fit | €2,200–€3,200 | Like-for-like replacement |
| System boiler, supply and fit | €2,800–€4,000 | Includes cylinder if needed |
| Oil boiler, supply and fit | €3,000–€4,500 | Tank inspection may be extra |
| Heat pump, supply and fit | €12,000–€18,000 | Before SEAI grant of €6,500 |
| Plumber rates Ireland 2026, fit only | €600–€900 | Labour only, customer supplies boiler |
| Annual boiler service Ireland | €80–€120 | Recommended every 12 months |
SEAI boiler grant Ireland 2026: how much can you get?
The SEAI Better Energy Homes scheme is open to homeowners across all 26 counties of Ireland. You must own and live in a home built before 2011. Grants are paid directly to your contractor after the work is completed and inspected by SEAI.
SEAI grant amounts for heat pump installation in Ireland
Heat pump (air to water): €6,500. Solar water heating: €1,200. Oil boiler replacement combined with heat pump: up to €8,000. Insulation upgrade grants are also available and are often required before a heat pump qualifies for full grant value. Attic insulation alone can add €1,500 in grant support. Find SEAI-registered insulation contractors at wallinsulationireland.ie.
How to claim your SEAI grant for boiler replacement
Hire an SEAI-registered contractor before any work begins. Grants cannot be claimed retrospectively once work is complete. Your contractor registers the job with SEAI and handles the inspection. The grant payment is issued to the contractor and reduces your upfront cost directly.
Find SEAI-approved installers
How to find a registered boiler installer in Ireland
Every gas boiler installer in Ireland must be registered with the RGII (Register of Gas Installers of Ireland). Here is how to verify and hire correctly.
Check the RGII register at rgii.ie
The RGII register is publicly searchable. Enter the engineer's name or registration number to verify current registration status. An unregistered installer cannot certify gas work in Ireland and any work they carry out is not covered under your home insurance policy.
Get three written quotes for boiler installation in Ireland
Quotes should specify the boiler model, labour cost, flue materials and any pipework changes required. A quote without a named boiler model is incomplete. The boiler specification affects warranty terms, SEAI grant eligibility and long-term running costs.
Confirm SEAI registration if claiming a grant
RGII and SEAI are two separate registers. RGII registration is mandatory for all gas work in Ireland. SEAI registration is required only for grant-eligible jobs. Your installer must be on both lists before any SEAI-funded work begins.
Request your gas safety certificate on completion
Your installer must provide a gas safety certificate on the day the work is completed. This is a legal document. Keep it with your home insurance documents and BER certificate. Without it, any gas work is unverifiable and will affect your property's resale.
Boiler installation questions from Irish homeowners
How much does combi boiler installation cost in Ireland in 2026?
A combi boiler supply and fit costs €2,200 to €3,200 in 2026 for a like-for-like replacement. Switching from a back boiler adds €400 to €800 for pipework changes. These figures include labour and VAT at 9%.
Do I need an RGII engineer for boiler installation in Ireland?
Yes. All gas boiler installation in Ireland requires an RGII-registered engineer by law. An unregistered installer cannot certify the work, your home insurance may be invalidated, and the installation will not be accepted for a BER certificate.
How long does boiler installation take in Ireland?
A like-for-like combi boiler replacement takes one working day. Switching boiler type takes two days. Heat pump installations take two to three days and may require additional work on your heating system and radiators.
Can I get an SEAI grant for a new boiler in Ireland in 2026?
SEAI grants are available for heat pump installation (€6,500) and oil boiler replacement. Standard gas combi replacements do not qualify for a direct SEAI grant, but insulation upgrades carried out at the same time may qualify separately.
What is the best combi boiler for an Irish home in 2026?
Viessmann, Worcester Bosch and Vaillant are the most frequently installed brands by Irish RGII engineers. Your engineer will recommend the correct output size in kW for your home's square footage, insulation level and hot water demand.
How much does an annual boiler service cost in Ireland?
Annual boiler service costs €80 to €120 in Ireland in 2026. Servicing every 12 months is required by most boiler manufacturers to maintain the warranty and ensures the boiler meets gas safety requirements.
More heating and boiler guides
Related guides from plumbersinireland.ie on heating installations, costs and what to expect.
Find a boiler installer in your county
RGII-registered boiler engineers available across all 26 counties of the Republic of Ireland.
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