Winner — Wales Energy Efficiency Awards 2026Boiler Installer & Heating Contractor of the Year
See Our Wales Award
Special Commendation — UK National Energy Efficiency Awards 2026Boiler Installer & Heating Contractor of the Year
View certificate (opens in a new tab)See Our National RecognitionBoiler brands we install
Explore the ranges. We recommend the right boiler for your home following an assessment.
Boiler services for homes in Llanelli
A clear heating plan comes from evidence. We consider appliance condition, household demand, water quality and controls, then explain the suitable options for your Llanelli home.
Boiler installation Llanelli
A property-led specification covering the boiler, relevant controls, system protection and commissioning.
Boiler repair Llanelli
Boiler Diagnostic & Repair£85inc. VAT
A clear diagnosis of the appliance and symptoms before any repair route is agreed with the homeowner.
Boiler servicing Llanelli
Boiler Servicing£85inc. VAT
Regular servicing to keep the boiler’s condition visible and help homeowners plan maintenance with fewer surprises.
SwiftHeat UK Group Ltd · Whole-home thinking
Heating, solar & whole-home energy in Llanelli.
One improvement or a longer-term plan: our expertise brings heating, electricity generation, storage and hot water into the same conversation. We assess your existing system, comfort, energy use and budget before recommending the next step.
Care for what you have
Gas, oil & LPG heating
Installation, servicing, fault diagnosis and system upgrades across gas, oil and LPG. We assess the appliance, fuel supply, pipework and controls together, with the appropriate specialists identified for the work.
Explore a different heat source
Heat pumps & hybrid heating
Air source heat-pump planning considers room heat loss, radiators, hot water and outdoor space. Where suitable, we can compare a hybrid arrangement combining a heat pump with a compatible boiler and coordinated controls.
Generate, store and use
Solar PV & battery storage
Explore rooftop solar, solar with storage, adding a compatible battery, and maintenance of existing systems. Roof condition, shading, seasonal generation, electricity use and tariffs shape the proposal.
Compare suitable electric heating
Electric boilers
Electric combi, system and suitable heat-only arrangements assessed around the heating circuit, hot-water demand, electrical capacity and running costs. We compare the complete proposal with other suitable heating options.
Match supply to daily life
Cylinders & electric hot water
Hot-water cylinder assessment and replacement, direct electric unvented storage and compact electric heaters. We consider capacity, recovery, mains supply, available space and the requirements of the chosen installation.
Make the system work together
Controls, radiators & underfloor heating
Smart thermostats, TRVs, zoning, radiator upgrades and underfloor heating, with balancing and system cleaning where needed. We check compatibility and heat delivery so improvements suit the way you use your home.
One home. A connected energy plan.SwiftHeat UK Group Ltd · Assess first. Recommend second.
Whole Home Energy Solutions in Llanelli.
Bring heating, hot water, solar generation, battery storage and smart controls into one considered plan. We assess how suitable technologies can work together around your property, energy use and budget.
For enquiries around SA14 and SA15, tell us your full postcode, existing fuel and equipment, and what you want to improve. We can consider suitable combinations or phase the work around your priorities. Availability, responsible installers, relevant certification and aftercare are confirmed in your proposal.
Solar output varies through the year. Batteries have limited capacity, and most homes retain a grid connection. Equipment compatibility, electrical capacity and expected running costs are checked before a combined system is recommended.
Llanelli homeowner heating guide
Coastal and urban heating advice for Llanelli
Llanelli includes traditional terraces, large estates and newer homes near the coast. External exposure and the condition of older radiator circuits both affect long-term reliability.
We check flue and pipe locations, system water and control strategy so the installation is suited to both the house and the coastal environment.
Heating-system assessments and upgrades · Radiator improvements · Heating controls
That local property context is considered alongside the boiler, controls, radiator circuit and hot-water pattern, so the advice for a Llanelli home is grounded in evidence rather than a standard package.
Verified SwiftHeat work and customer evidence
These approved photographs show genuine SwiftHeat UK diagnostics and installations. They are representative workmanship examples and are not presented as projects completed in Llanelli unless a separate case study below names the town and postcode district.
Approved customer feedback
Experience behind the local service.
These are genuine SwiftHeat UK customer reviews. No location is attributed where the approved source does not provide one.
A great professional service from start to finish.
Read more
Excellent communication and the help and advice provided excellent too. Highly recommend and we will be using Swiftheat again for future works we have planned.
Fantastic service, completed the installation very quickly and to a high standard.
Read more
Very professional company with very high standards. Exceptional work and competitive price. Would highly recommend!
Our Work • Installation examples
Explore our completed heating projects
Considering heating work in Llanelli? Explore examples completed elsewhere in South Wales. These are examples of our installation work, with each project's actual location clearly identified.
A Navien combi upgrade with wireless controls.
A new NCB300 28kW combi with magnetic filtration, a shock arrestor, complimentary thermostat and five-year manufacturer’s warranty.
View the Penarth, South Wales case study →
A considered Baxi combi installation.
A Baxi 800 30kW combi with MagnaClean protection, complimentary wireless controls, ten-year manufacturer’s warranty and twelve-month installation guarantee.
View the Cardiff, South Wales case study →Planning a heating visit in Llanelli
Send the full postcode, property type and any parking or access restrictions. The SA14 and SA15 districts are a guide; we confirm the actual address and appointment availability.
Share the make, model and visible fault code if known, or a photograph taken safely without removing covers. Tell us whether you need servicing, fault diagnosis or an installation survey.
Tell us your current fuel, insulation, hot-water needs, available outdoor space and whether a hot-water cylinder is fitted. We assess room-by-room heat loss, radiator suitability and outdoor-unit siting before recommending a suitable system.
Read the heat-pump assessment guideFull information, one authoritative source
Essential SwiftHeat UK guides for Llanelli
These concise summaries point to the central pages where current terms, qualifications and full service details are maintained.
0% options for eligible installations
Eligible boiler installations from SwiftHeat UK Group Ltd may have repayment options of 3 months, 6 months, 9 months or 12 months through Humm Group Limited. 0% finance is subject to eligibility, approval and provider terms. Any applicable deposit, fees, repayment conditions and total payable are explained during your enquiry/application. Review the terms supplied before applying.
A measured route to renewable heating in Llanelli.
Heat pumps usually operate with lower water temperatures than traditional boilers. Careful emitter sizing and control strategy are therefore central to a dependable proposal for a Llanelli property. Current Boiler Upgrade Scheme support is subject to the property, technology, MCS and scheme eligibility rules.
The Boiler Upgrade Scheme offers £7,500 towards an eligible air-to-water heat pump in England or Wales. Qualifying homes currently heated by oil or LPG, with no mains-gas connection, may receive an additional £1,500 (£9,000 in total) until March 2027. An MCS-certified installer must confirm eligibility and apply on your behalf; approval is not guaranteed.
Running costs and any savings depend on the property, system design, controls and energy tariff.
Wales’ 2026 heating-contractor winner
SwiftHeat UK won Wales’ Boiler Installer & Heating Contractor of the Year 2026, alongside Highly Commended and Commended honours, and received a Special Commendation in the national Boiler & Heating Installer and Contractor of the Year category.
Cardiff City benefits and Disability Confident
SwiftHeat UK Group Ltd is Disability Confident Committed. Eligible Cardiff City season-ticket holders can also receive 15% off qualifying new boiler installations and boiler servicing under the current published offer terms.
Local heating questions
Boiler and heating FAQs for Llanelli
What address information is needed for an enquiry around Llanelli?
The principal postcode focus is SA14 and SA15. SwiftHeat UK also considers enquiries from Burry Port, Gorseinon, Kidwelly and Ammanford; the team confirms the exact address, required work and engineer availability before booking.
How does SwiftHeat UK investigate uneven heating around Llanelli?
Llanelli includes traditional terraces, large estates and newer homes near the coast. External exposure and the condition of older radiator circuits both affect long-term reliability. We check flue and pipe locations, system water and control strategy so the installation is suited to both the house and the coastal environment. Treat corrosion or leaks before adding inhibitor; chemicals preserve a sound system but cannot repair damaged components.
Can household hot-water needs be reviewed during a Llanelli survey?
For a Llanelli visit, start with the full postcode, the boiler make if known, the symptoms or planned work and the best contact method. SwiftHeat UK reviews those details, checks travel around Burry Port where relevant and explains whether the next step is diagnostics, servicing or an installation survey.
Where can I compare boiler repair and replacement help for Llanelli?
If the correct route is unclear for a property in SA14 and SA15, describe the symptoms and the outcome you want in one enquiry. The team can distinguish a Llanelli service appointment from diagnostic work or a replacement survey without creating unnecessary duplicate bookings.
Local service coverage
Serving Llanelli and nearby communities
Our Llanelli service area is centred on SA14 and SA15 and includes homes throughout Carmarthenshire, with nearby coverage around Burry Port, Gorseinon, Kidwelly, Ammanford. If your location is not listed, contact us—SwiftHeat UK works across Wales and throughout the UK.
Browse all Areas We Cover →
Gas Safe registered business978273
- Wales’ Boiler Installer & Heating Contractor of the Year 2026
- Gas, Oil and LPG boiler expertise
- Air source heat-pump assessment and installation
- Domestic & Commercial Heating • Plumbing • Engineering
- Manufacturer warranties from 5–12 years on eligible boilers
- 0% finance options, subject to eligibility and terms
Assess first. Recommend second.
One home.A clear route from enquiry to quotation.
Tell us what is happening at your Llanelli property and what outcome you want. Mention the boiler, controls or rooms affected; our team will review the detail and contact you with a sensible next step for your home in Carmarthenshire.
- 1Send a few details about your boiler, heating system or project.
- 2A member of the SwiftHeat UK team will contact you using your preferred method.
- 3Receive considered advice and a clear quotation for your Llanelli property.