Find a verified Gas Boiler Installer in Ireland
Like-for-like or system upgrade boiler swaps by RGI-registered installers. Gas safety certificate included.
What does a gas boiler installer do?
A gas boiler replacement swaps your existing gas boiler — combi, system, or regular — for a new high-efficiency condensing model. In Ireland, all gas boiler work must be carried out by a Registered Gas Installer (RGII). A typical replacement involves removing the old unit, fitting the new boiler, flushing the system to clear sludge, fitting a magnetic filter, updating controls and thermostats, and a thorough commissioning.
Most Irish homeowners replace boilers when the old unit fails repeatedly, no longer holds pressure, costs more in repairs than a swap, or loses efficiency. Modern condensing boilers run at 90–94% efficiency vs 70–80% for older non-condensing units. Pairing a boiler swap with smart controls (Hive, Nest, Honeywell evohome) gets you another 10–15% in heating cost savings through better zoning and scheduling.
Common gas boiler installer services
From routine fixes to bigger projects — here's what Irish gas boiler installers on Jobiit typically handle.
- Combi boiler replacement
- System (heat-only) boiler swap
- Boiler relocation
- Power flush and system clean
- Magnetic filter installation
- Smart thermostat install
- Zone valve and control upgrade
- Flue extension or rerouting
- Cert of Compliance (RGI)
- 12-month parts and labour warranty
How much does a gas boiler installer cost in Ireland?
Indicative pricing — your actual quote will vary
Boiler replacement pricing varies by boiler type, brand, and any extras like filters or controls. The figures below are indicative Irish ranges fitted, including disposal of the old unit.
A like-for-like combi swap typically runs €1,800–€3,000 fitted with a mid-range brand (Vaillant, Worcester Bosch, Ideal). Premium boilers (Viessmann, top-end Vaillant) push to €2,800–€3,800. System and regular boilers are similar pricing. Adding a power flush is €350–€550. Magnetic filter is €150–€220 fitted. Smart thermostat install is €250–€450. A full package — boiler, flush, filter, smart stat — typically lands €2,800–€4,200.
These are indicative ranges based on typical Irish jobs. Final pricing depends on scope, materials, urgency, and the trader you choose. On Jobiit you'll receive itemised quotes (labour, materials, VAT) so there are no surprises.
Why hire your gas boiler installer through Jobiit
We built Jobiit to fix what's broken about finding tradespeople in Ireland.
Verified & insured traders
Every trader on Jobiit is ID-checked, has valid insurance, and is reviewed by real customers before they can quote.
Secure payments
Pay through the app or using tap-to-pay, securely with Stripe.
No lead fees, ever
Free for homeowners. Traders pay a small platform fee on completed jobs only — never per lead.
Real reviews, real ratings
All reviews come from completed, paid jobs. No fake stars. See what actual customers said before you book.
How we vet every trader
- 1
ID verification
Every trader passes a government-issued ID check before they can quote on jobs.
- 2
Insurance & qualifications
Public liability insurance, trade-specific qualifications, and registrations are validated and kept current.
- 3
Real reviews, no fakes
Reviews can only be left after a paid, completed job. No anonymous ratings.
- 4
Dispute resolution
In-app dispute process with mediation by our support team if you and your trader can't agree.
Gas Boiler Installers across Ireland
Jobiit covers the whole of Ireland. Wherever you are, local gas boiler installers are quoting on jobs near you.
- Dublin
- Cork
- Galway
- Limerick
- Waterford
- Drogheda
- Swords
- Dundalk
- Bray
- Navan
- Kilkenny
- Sligo
Gas Boiler Installer FAQs
How long should a new gas boiler last?
A modern condensing gas boiler installed by an RGI and serviced annually should last 12–15 years. Some last longer with diligent service; others have shorter lifespans if the system is dirty or pressure issues are ignored. Most warranties are 7–12 years parts and labour. Annual service is required to keep most warranties valid.
Is a power flush necessary when fitting a new boiler?
Strongly recommended on any system over 8–10 years old, or any system with cold-spot radiators, slow heat-up, or sludge in the filter. A power flush removes magnetite and sludge that would otherwise quickly clog the new boiler's heat exchanger, voiding the warranty. Most boiler manufacturers require either a flush or chemical clean to honour warranty claims.
Combi vs system boiler — which suits my home?
Combi boilers heat water on demand and don't need a hot water cylinder — best for small to mid-sized homes with 1–2 bathrooms and limited airing-cupboard space. System boilers feed a hot water cylinder and handle multiple bathrooms running simultaneously without flow drop. Larger homes (3+ bathrooms) usually do better on a system. Your installer should recommend based on simultaneous demand.
Why does my old boiler keep losing pressure?
Common causes are a leaking pressure relief valve (PRV), a perished expansion vessel, micro-leaks in the system, or a leaking automatic air vent. If your boiler is over 10 years old and pressure loss is recurring after multiple repairs, replacement is usually more economical than continued fixes. An RGI can identify the cause in a 60-minute diagnostic.
Do I need an RGI for a boiler swap?
Yes — legally. All gas boiler installation, replacement, repair, and service in Ireland must be carried out by an RGI registered with the Register of Gas Installers of Ireland (rgii.ie). After the install, the RGI must issue a Declaration of Conformance and a CO alarm test certificate. Always ask for the RGI registration number and verify on rgii.ie before booking.
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