Why replace an Oil Boiler?
Older oil boilers can waste up to 35–40% of their fuel through flue gases and poor combustion efficiency.
Result: A modern condensing oil boiler operates at over 90% efficiency, converting almost every drop of oil into usable heat — saving you money and reducing emissions.
Why Choose Oil Boiler Replacement?
Is My Home Suitable?
Most oil boiler upgrades can be completed in 1–2 days with minimal disruption, typically using your existing oil tank and radiators.
How an Oil Boiler Replacement Works
Upgrading your oil boiler is simple, quick, and hassle-free:
Most replacements are completed in 1–2 days — giving you warmer, more reliable heating with lower fuel bills.
SEAI Grants & Supports
SEAI does not provide grants for new oil boilers — however, generous funding is available for homeowners who upgrade from oil to a heat pump system.
Our team will:
- Confirm your eligibility for increased heat pump grants
- Advise on the most cost-effective transition
- Guide you through the application process
Moving from oil to renewable heating not only improves comfort — it also significantly reduces long-term fuel costs and carbon emissions.
How the Process Works
We inspect your current boiler, oil tank, and heating setup.
You receive a clear, fixed-price quote and system recommendation.
We agree a date that suits your home.
Our technicians remove your old boiler, fit the new condensing model, and test the full system.
Optional smart thermostat setup and efficiency check included.
Frequently Asked Questions on Oil Boiler Replacement
We’ve answered some common questions to help you with any concerns
Costs depend on boiler type, home size, and insulation. We provide free, no-obligation quotes and identify available grants to reduce upfront costs.
Through installation of smart heating controls, you may be entitled to a grant of €700. Homeowners replacing Gas or Oil systems with Heat Pumps will qualify for grants up to €12,500. We’ll guide you through the application to ensure you get the maximum support available.
Oil boiler replacements usually take 1–2 days. We carefully plan work to minimise disruption to your home life.
Upgrading to a modern oil boiler can reduce energy usage and fuel bills, especially when combined with smart heating controls.
Hear from Our Customers
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June 2026 External Wrap, Cavity Wall and Attic Insulation. Chimney blocked and vents inserted in all of the rooms and attic. I would like to thank Tony, the project manager and Niamh in the office for such a good experience (and all the Bluebuild people who worked on our house). Bluebuild carried out all works in a timely, professional manner with minimum distruption. They organised everything and helped with the grant paperwork. I would have no hesitation recommending Bluebuild.
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Very happy with all works done 'lads were very helpful always ,worked very hard and long days to get our job done thanks to all who helped get our ho.e finished
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Fantastic service from Blue Build. The whole team did an excellent job wrapping our house. They were professional, reliable, hardworking, and the quality of the workmanship is outstanding. We couldn’t be happier with the finished result and would highly recommend them.
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We recently had external insulation installed on our home, and we couldn't be happier with the entire experience. The professionalism shown by everyone involved was outstanding. The quality of the workmanship is excellent, and the attention to detail is clear in the finished result. The installation crews were incredibly hardworking, friendly and courteous. They arrived early each day, worked efficiently, and were always happy to answer any questions we had. The management team were equally impressive. They were approachable, helpful and very accommodating throughout the project, making the whole process straightforward and stress-free. Nothing ever seemed like too much trouble. The work was completed much quicker than we expected, without any compromise on quality. The team also took great care to keep everything clean and tidy, leaving the property in excellent condition when the job was finished. We are absolutely delighted with the final result and would have no hesitation in recommending this company to anyone . A first-class service from start to finish. We'd like to specifically thank Michael, Colm, Lulian and his crew and Niamh the secretary!
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Had the most wonderful group of lads in to do the wrap fan s windows and attic insulation in my mum's house in wicklow town under the supervision of Jason roe project manager From start to finish a fantastic job the lads all very mannerly and plesent extremely tidy Could not rate them any higher Thrilled with the end result Thank you guys Andre and most of all Jason
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