Site survey and sizing
A qualified engineer visits to measure the property, calculate the heating load and advise the right boiler type and location before any parts are ordered.
TJ&H · St Asaph & North Wales
Boiler Installation in St Asaph
Gas Safe and OFTEC qualified engineers supplying and fitting correctly sized boilers, commissioning systems and handing over controls. Friendly, reliable service across St Asaph and surrounding towns.
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Expert Boiler Installation from TJ&H PLUMBING & HEATING LIMITED
Our Gas Safe registered engineers and OFTEC qualified technicians lead every boiler installation, bringing 18 years of practical experience and high on-site standards. We supply and fit boilers from leading manufacturers, sized to your property and heating load, then fully commission the system and hand over controls with clear instruction. Installations carry a 12 month workmanship guarantee that if our work has failed due to our workmanship, then we will make it right.
How It Works
Supply and fit
We deliver the chosen boiler from a trusted manufacturer, isolate and remove the old unit where required, fit pipework and controls and install according to regs.
Commissioning and handover
Full commissioning, safety checks and flue tests are completed, controls are set up and explained. 12 month workmanship verbal guarantee, if our work is wrong due to workmanship we will make it right.
Why Choose us for Boiler Installation?
Qualified engineers and safety
Gas Safe registered and OFTEC qualified technicians ensure installations meet regulatory safety standards and pass all required checks.
Right-sized systems for efficiency
Boilers are specified to the actual heating load of the property, not guesswork, reducing running costs and avoiding short-cycling.
Local, reliable support
Based in St Asaph with 18 years' experience, TJ&H offers same-day emergency response, clear communication and a 12 month workmanship guarantee.
What this service covers
Supply and fit from leading manufacturers, specified to suit traditional terraces, semis and modern new builds across St Asaph and nearby towns. We work with trusted boiler brands and size each system by room heat losses and hot water demands, so small properties are not oversized and large properties get the capacity they need.
Commissioning, controls and handover. Every installation includes full commissioning, flue and pressure checks, and an explanation of timers, thermostats and smart controls where fitted. Our engineers will set the system for efficient operation and show you how to use the controls. For convenience you can contact us by phone or WhatsApp for follow ups.
Frequently Asked Questions
How long does a boiler installation take?
Times vary by property and scope. A straightforward like-for-like combi swap often takes one day, while full system installs or properties requiring new flues and pipework can take longer. Your survey will give an accurate programme and we keep disruption to a minimum.
Which boilers do you install?
We supply boilers from industry-leading manufacturers chosen for reliability and efficiency. The final make is selected during the survey based on property type, whether you need a combi, system or regular boiler, and your hot water requirements.
Will you size the boiler correctly for my house?
Yes. Our engineers carry out a heat loss assessment and consider radiator sizes and hot water demand before specifying the boiler. Correct sizing prevents inefficiency and premature wear.
Do installations include guarantees and certificates?
All work is completed to current regulations with commissioning certificates provided. Installations include a 12 month workmanship guarantee and applicable manufacturer warranties for parts and boilers.
Can you fit controls or smart thermostats with the new boiler?
Absolutely. We install and commission thermostats, programmers and smart controls to improve comfort and efficiency. We will explain schedules and show you how to manage devices during the handover.
Planning your quote
The boiler type, hot-water demand, controls, pipework and flue route affect the installation scope. Contact us to arrange an assessment and a quote for your property.
Coverage & related services
Based in St Asaph, we cover surrounding North Wales towns. Check the areas we serve or contact us with your postcode.