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New Boilers


  • Local Gas Safe engineers

  • Professionally fitted

  • Exclusive Blue Flame Warranty™

BOILER COVER


  • Local Blue Flame engineers

  • In-house parts & labour

  • No call centres

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    BOILER REPAIRS


    • Same-day diagnostics

    • Experienced engineers

    • Fast local call-outs

    Boiler Servicing


    • Safety & efficiency checks

    • Warranty compliance

    • Annual reminders

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    Air Conditioning Home


    • Local F-Gas engineers

    • Professionally fitted

    Air Conditioning Install


    • Local Blue Flame engineers

    • No call centres

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      Air Conditioning Repair


      • Same-day diagnostics

      • Experienced engineers

      Air Conditioning Service


      • Safety & efficiency checks

      • Warranty compliance

      Blue Flame warranty


      • Parts & labour covered in-house

      • Managed directly by Blue Flame

      • Designed for reliable local support

      local in-house engineers


      •  Work done by our local team

      • All jobs completed in-house

      • Faster response & local knowledge

      trusted & award-winning


      • Gas Safe Registered

      • Which? Trusted Traders

      • Award-winning local business

      family-run, south wales


      • Independent local company

      • Not a national call centre

      • Over 10 years serving South Wales

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      Advice & Guides


      • Boiler FAQs & Homeowner Guides

      • Smart Controls & Thermostats

      • Energy Saving Tips

      • Gas Safety Advice

      Enginer-Help-Guide

      Support & Controls


      • Boiler Fault Codes & Diagnostics

      • Boiler Pressure & Filling Loog Guides

      • Manufacturer Support Guides

      • Heating System Troubleshooting

      Costs & Comparisons


      • Boiler Installation Cost Guides

      • Boiler Repair & Service Costs
      • Blue Flame vs British Gas

      • Blue Flame vs BOXT

      Need expert advice? Speak to us →

      Why Homeowners Choose Viessmann

      Viessmann is one of the most trusted boiler manufacturers in the UK — and for good reason.

      Homeowners choose Viessmann because of:

      • Strong UK parts availability

      • Long manufacturer warranties (when installed correctly)

      • Proven reliability across their better-performing ranges

      • Nationwide support network

      However, like all manufacturers, Viessmann produces entry-level, mid-range, and premium models — and not all are equally suited to every home.

      That’s where engineer judgement matters.

      Why We Don’t Install Every Viessmann Model

      This is where Blue Flame is different.

      We provide in-house parts & labour-backed warranty support, which means:

      • If something goes wrong, we are responsible

      • Call-backs cost us, not a call centre

      • Poor model selection creates long-term problems

      Because of that, it’s in our best interests to:

      • Avoid weaker designs

      • Install proven, reliable Viessmann ranges only

      • Match the boiler properly to your property and usage

      This creates the opposite incentive to national installers, who often prioritise volume over longevity.

      Which Viessmann Boilers Do We Install?

      Rather than listing every model, we focus on what works best in real homes.

      ✔️ Best for family homes

      Reliable Viessmann combi and system boilers with:

      • Stable hot water delivery

      • Strong internal components

      • Good long-term serviceability

      ✔️ Best for apartments & smaller properties

      Compact Viessmann models suited to:

      • Lower demand

      • Limited cupboard space

      • Efficient daily use

      ✔️ Best for higher hot water demand

      Viessmann system boilers paired with cylinders where:

      • Multiple bathrooms are in use

      • Flow rate matters

      • Consistency is key

      We’ll always explain why a specific model is recommended — not just quote a price.

      Viessmann boiler in Bathroom

      Installed Properly — Not Rushed

      A Viessmann boiler is only as good as its installation.

      Our engineers take care of:

      • Correct system flushing

      • Proper pipe sizing

      • Clean, tidy copper runs

      • Controls setup and commissioning

      • Clear homeowner handover

      This reduces breakdowns, noise issues, and premature wear.

      Is a Viessmann Boiler Right for Your Home?

      Viessmann is an excellent choice for many homes — but it isn’t always the right choice for everyone.

      We’ll help you decide based on:

      • Property size

      • Hot water demand

      • Existing system layout

      • Long-term reliability, not short-term cost

      No pressure. No sales scripts. Just straight answers.

      Blue Flame Warranty™ (Why This Matters)

      Every Viessmann Boiler installation includes Blue Flame Warranty™, which means:

      Because we stand behind our work, we’re selective about what we install.

      That’s confidence — not marketing.

      Viessmann Boiler Installation

      Complimentary Silver Cover Included with Every Viessmann Installation

      Why this is included:
      Included because we selectively install only the most reliable Viessmann models and back our work with in-house parts & labour warranty, we’re confident enough to include complimentary cover.

      Continue Your Cover After Year One

      Continue your protection from just £6.99 per month after the free first year.

      • In-house parts & labour warranty
      • Manufacturer parts warranty (where applicable)

      • 12 months complimentary Silver Cover

      • Ongoing servicing continuity with the same local team

      “It’s a benefit we can offer because we control the quality from installation to aftercare.”

      Frequently Asked Questions

      Are Viessmann boilers reliable?

      Viessmann boilers are widely regarded as one of the most reliable boiler brands in the UK when the correct model is chosen and installed properly.

      Their stronger-performing ranges offer good component quality, strong UK parts availability, and long manufacturer warranties when installed to specification.

      Do you install all Viessmann boiler models?

      No. We don’t install every model in the Viessmann range.

      Viessmann produce entry-level, mid-range, and premium boilers — and not all are equally suited to every home.

      We selectively install proven, reliable Viessmann models based on real-world performance, serviceability, and long-term reliability.

      Which Viessmann boiler is right for my home?

      That depends on:

      • Property size

      • Hot water demand

      • Existing system layout

      • Long-term running expectations

      We’ll always explain why a specific Viessmann model is recommended, not just quote a price.

      Are Viessmann boilers good for family homes?

      Yes — when paired with the right output and system design.

      Many Viessmann combi and system boilers perform well in family homes where:

      • Consistent hot water delivery matters

      • Reliability is more important than headline features

      • Long-term servicing access is considered

      Are Viessmann boilers good for smaller homes or apartments?

      Yes. Viessmann offer compact models designed for smaller properties, flats, and apartments where:

      • Space is limited

      • Hot water demand is moderate

      • Efficiency and quiet operation matter

      We’ll advise on the most suitable compact options.

      Frequently Asked Questions

      How important is installation quality with a Viessmann boiler?

      Very.

      A Viessmann boiler is only as good as its installation. Poor system flushing, incorrect sizing, or rushed commissioning can lead to:

      • Noise issues

      • Reduced efficiency

      • Premature component wear

      That’s why installation quality matters as much as the boiler itself.

      What warranty comes with a Viessmann boiler installed by Blue Flame?

      Every Viessmann boiler installed by Blue Flame is backed by the Blue Flame Warranty™ — covering all parts and labour, always.

      Manufacturer parts warranties apply where applicable and are handled by us as part of the overall warranty support.

      Do Viessmann boilers require annual servicing?

      Yes. Like all boilers, Viessmann boilers require annual servicing to:

      • Maintain warranty validity

      • Ensure safe operation

      • Protect long-term reliability

      We offer ongoing servicing so your boiler is looked after by the same engineers who installed it.

      Are Viessmann boilers easy to service and repair?

      Yes — one of Viessmann’s strengths is good UK parts availability and familiar system layouts.

      This makes diagnostics faster and repairs more straightforward when servicing is carried out correctly.

      Is a Viessmann boiler always the right choice?

      Not always.

      Viessmann boilers suit many homes, but they aren’t the right solution for every property. We’ll always give honest, engineer-led advice and help you decide based on suitability — not brand alone.

      All boiler installations are carried out in accordance with our General Boiler Works Terms & Conditions.