Boiler Installation Cardiff
Cardiff’s Local Boiler Installation Specialists
Upgrade your heating with a new boiler installed by experienced Gas Safe engineers trusted across Cardiff.
Book an Engineer →Your Local Plumber in Cardiff
We are a Cardiff-based team installing boilers for homes of all ages, from modern developments to older period properties.
Gas Safe Registered (518700)
NJ Harkus is Gas Safe registered (518700), City & Guilds qualified and CIPHE members, with full public liability insurance for all plumbing, heating and gas work.
Highly Recommended & Reviewed
Our reputation for quality boiler installations is built on experience, transparency, and genuine customer satisfaction.
Boiler Replacement Services Cardiff
Fitted By Gas Safe Engineers
Installing a new boiler is a significant investment, and it is important that the system is correctly specified, installed safely, and set up to suit your home. At NJ Harkus, we provide professional boiler installation services across Cardiff, helping homeowners replace outdated systems or upgrade to more efficient modern boilers.
Our experienced Gas Safe registered engineers take the time to assess your property, heating demands, and hot water usage before recommending the most suitable boiler.
We work with leading manufacturers, including Worcester Bosch, Vaillant, Viessmann, Baxi and Ideal, allowing us to install systems we trust for long-term performance and reliability.
Our boiler installation service typically includes:
- Removal of your existing boiler and associated components
- Advice on the most suitable boiler type for your home
- Safe installation by Gas Safe registered engineers
- System checks, commissioning, and clear operating guidance
- Tidy workmanship with minimal disruption to your home
Do You Need To Install A New Boiler?
Boiler Installation Services Across Cardiff & Nearby
We provide boiler installation services throughout Cardiff and the surrounding areas, supporting homeowners across the city and nearby locations, including Penarth, Barry, Dinas Powys, Radyr, Pontcanna, Llandaff, and Roath. As a Cardiff-based company, we understand the wide range of properties in the area and install boilers suited to both modern homes and older heating systems. If you are unsure whether we cover your area, our team is always happy to confirm availability.
Business Hours
24 Hours, 7 Days A Week
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We Are Highly Recommended in Cardiff & The Surrounding Areas
Why Choose NJ Harkus To Fit Your New Boiler
Professional From Start To Finish
NJ Harkus is a family-run business with over 15 years of experience installing boilers across Cardiff. Our approach is simple: we do the job properly, communicate clearly, and treat every home with respect.
With over 1,000 five-star Google reviews, our boiler installation service is trusted by homeowners who value reliability, workmanship, and honest advice. We are fully Gas Safe registered and insured, giving you complete confidence that your boiler installation is carried out safely and in line with current regulations.
From the initial assessment to final commissioning, our team remains focused on long-term performance and customer satisfaction, not quick fixes.
Combi, System & Regular Boiler Installations
Boilers Chosen To Suit Your Home
Every home is different, which is why choosing the right boiler is just as important as the installation itself.
Our experienced team of plumbers in Cardiff take a practical approach, explaining the differences between combi, system and regular boilers and how each option may suit your property, household size, and hot water usage.
We consider factors such as property layout, existing pipework, water pressure, and future heating needs before making any recommendations. This ensures your new boiler is correctly sized and capable of delivering consistent heating and hot water without unnecessary running costs.
Our aim is to provide clear, honest advice so you can make an informed decision, whether you are replacing a failing boiler or planning a full heating upgrade.
Frequently Asked Questions
Our Boiler Installation FAQs
Do we remove my old boiler?
Yes, we safely remove and dispose of your existing boiler as part of the installation.
Will we help me choose the right boiler?
Yes, we assess your home and usage before recommending suitable options.
How long does a boiler installation usually take?
Most boiler installations are completed within one day, though more complex systems may take longer.
Which boiler brands do we install?
At NJ Harkus, we will happily install most branded new boilers, but the trusted brands we recommend include Worcester Bosch, Vaillant, Viessmann, Baxi, and Ideal.
