Survey and Heat Loss Assessment
We visit the property, measure heat loss, map pipe routes and confirm plant siting, access and fuel type to produce accurate specifications.
TJ&H · St Asaph & North Wales
Central Heating Systems in St Asaph
Full design and install of central heating systems for new builds, upgrades and replacements in St Asaph and North Wales. Gas Safe and OFTEC engineers, 12 month workmanship guarantee and same-day emergency response.
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Central Heating Systems Done Right
Our three-step process starts with a detailed on-site survey to assess heat loss, pipe runs and plant location. Next we produce a bespoke system design and parts schedule that balances boiler sizing, pipework layout and controls. Final stage is professional installation, commissioning and handover with safety certificates and user instruction.
How It Works
Bespoke System Design
We select boiler size, pipework layout, radiators or underfloor circuits and controls, then supply a parts schedule and timeline for approval.
Installation, Commissioning and Handover
Our Gas Safe or OFTEC-registered engineers install, pressure test and commission the system, issue safety paperwork and explain operation and controls.
Why Choose us for Central Heating Systems?
Nearly Two Decades of Practical Experience
18 years on boilers, central heating and replacements means accurate sizing, tidy pipework and reliable system performance on first fix and final commissioning.
Gas Safe and OFTEC Registered
All gas and oil work is carried out to current regulations by qualified engineers, with full safety checks and certificates on completion.
12 Month Workmanship Guarantee and Rapid Response
Every installation is backed by a 12 month workmanship guarantee, plus emergency same-day call-outs to get homes back to heating quickly.
What this service covers
Central heating systems are an integrated job: pipe runs, plant location, flue routing and controls must work together to give even heat and efficient fuel use. TJ&H Plumbing & Heating Limited specialises in systems for traditional stone houses, modern new builds and converted lofts in St Asaph and North Wales. Our designs consider boiler type, cylinder location, room-by-room radiator sizing and whether underfloor heating is a better option for the space.
Frequently Asked Questions
Do you design systems for new builds and older properties?
Yes. We tailor designs to each property type. For new builds we coordinate plant position and meter locations; for older properties we assess insulation, pipe access and radiator locations to minimise disruption while delivering the required output.
How long does a full central heating installation take?
Timescales depend on property size and scope. A typical single-storey or small house install is faster than a full multi-storey refurbishment. We provide a clear programme after the survey so you know access days and milestones before work starts.
Will you size the boiler and radiators for my house?
Yes. We carry out heat loss calculations and size boilers and radiators accordingly. Correct sizing prevents short-cycling, reduces running costs and delivers even room temperatures throughout the property.
Do you handle controls and smart thermostats?
Absolutely. We fit and commission room thermostats, programmers, TRVs and smart control systems, and explain how to use them. Correct controls are essential to efficiency and homeowner comfort.
What safety and certification do you provide?
All gas work is completed by a Gas Safe registered engineer and oil work by OFTEC qualified staff. We issue the relevant certificates and commissioning documentation on completion, and back installations with a 12 month workmanship guarantee.
Coverage & related services
Based in St Asaph, we cover surrounding North Wales towns. Check the areas we serve or contact us with your postcode.