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Boiler installers in Wales

Boiler installers in Wales typically charge £2,500 for a Worcester Bosch Greenstar 4000 combi, fitted, with most jobs between £2,000 and £3,100 including VAT. That is 6% below the UK average, because local installers charge around £155–£215 a day.

Covers Cardiff, Swansea, Newport, Wrexham, Bangor, Merthyr Tydfil and the surrounding areas.

A valley terrace in Wales with a boiler flue on a rear wall.

What boiler installers in Wales charge: combi boiler models

ProductTypical hereUK typical
Worcester Bosch Greenstar 4000 Worcester Bosch Greenstar 4000 combi, fitted£2,500£2,700
Ideal Logic Max Ideal Logic Max combi, fitted£2,600£2,800
Viessmann Vitodens 100-W Viessmann Vitodens 100-W combi, fitted£2,600£2,800
Vaillant ecoTEC Plus combi Vaillant ecoTEC Plus combi, fitted£4,400£4,700

Guide prices including VAT, −6% against the UK average. Indicative, not quotations.

What boiler installers in Wales charge: boiler types

ProductTypical hereUK typical
Gas combi boilers 24 to 30kW gas combi boiler, like-for-like swap, fitted£2,600£2,700
System boilers Gas system boiler, like-for-like swap, fitted, hot water cylinder not included£2,800£3,000
Regular boilers Gas regular (heat-only) boiler, like-for-like swap, fitted£2,800£3,000
Electric boilers 12kW electric boiler, no cylinder, fitted£2,800£3,000
Oil boilers Oil boiler, heat-only at the low end and combi at the high end, fitted£3,100£3,300

Guide prices including VAT, −6% against the UK average. Indicative, not quotations.

What boiler installers in Wales charge: boiler installation

ProductTypical hereUK typical
Boiler conversions System or regular boiler to gas combi, fitted£3,400£3,600
Back boiler replacement Back boiler to gas combi, fitted£4,100£4,400
Boiler relocation Moving a boiler to a new position in the home£760£800
Power flushing Power flush of a central heating system£470£500

Guide prices including VAT, −6% against the UK average. Indicative, not quotations.

What boiler installers in Wales charge: boiler service and repair

ProductTypical hereUK typical
Boiler servicing Annual service of a gas combi boiler£90£100
Boiler repairs Typical boiler fault repair, parts and labour£330£350

Guide prices including VAT, −6% against the UK average. Indicative, not quotations.

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Boiler installers and housing in Wales

In Wales, the Nest scheme and the Boiler Upgrade Scheme are separate from the English schemes, and the building rules are set by the Welsh Government. A combi is the usual choice in the valley towns and the coast; farmhouses off the gas network may use oil.

Wales has many stone terraces in the valleys and older farmhouses, a lot of them with solid walls and awkward flue routes. Installers in the valleys and in Cardiff and Swansea are used to fitting a combi in a small kitchen, and rural homes often need an oil or LPG quote.

In the valley terraces and older farmhouses of Wales, conversions often involve awkward flue routes through solid walls. Building rules in Wales are set by the Welsh Government, and Nest may help eligible households with a replacement.

Wales has valley terraces and rural farmhouses, so boilers range from compact combis to oil boilers outside the gas network. A service on an oil boiler needs an OFTEC engineer, so say which fuel you have when you book.

Wales has one of the highest proportions of solid-wall, pre-1919 housing anywhere in the UK. The valleys are lined with stone terraces built for the coal and steel industries, roofed in Welsh slate and stepped down steep hillsides, which makes access and scaffolding a larger share of the bill than it would be on level ground. Cardiff and Newport add Victorian and interwar suburbs on more conventional lines.

Planning and building rules in Wales

Building regulations in Wales are set by the Welsh Government and have diverged from England, particularly on energy efficiency, so guidance written for England does not always apply. Eryri (Snowdonia), Bannau Brycheiniog (the Brecon Beacons) and Pembrokeshire Coast are National Parks, each with its own planning authority and tighter control over external change.

The weather

Wet and exposed. Snowdonia is among the wettest ground in the UK, with parts of the uplands recording well over 2,000mm a year against a UK average nearer 1,150mm. Driving rain on west-facing solid walls is the single biggest weathering problem in the Welsh stock, and it is why breathable repair and correct pointing matter more here than in the dry east of England.

Recent combi boiler model enquiries in Wales

What people in Wales have actually asked for, in their own words. Names, contact details and street addresses are not shown.

  1. March 2026SA73

    REPLACE WORCESTER 24 CDI Like for like

  2. October 2025BS22

    Gas boiler requires servicing

  3. January 2025S9

    Customer in the Sheffield area made an enquiry online for a new boiler and is waiting for a call. Confirmed interest. Please contact to arrange an appointment to discuss options for their home.

Enquiries submitted through LeadsDoWork in the last two years. Shown to give a sense of the work people in Wales are having done – they are not reviews, and no rating is implied.

Vaillant is a trade mark of its owner, named above in a homeowner's own words. CombiBoiler.net is independent and is not affiliated with, sponsored or endorsed by any manufacturer. See how we make money.

Recent boiler enquiries in Wales

What people in Wales have actually asked for, in their own words. Names, contact details and street addresses are not shown.

  1. May 2026SY18

    Call back anytime. type of building: detached number of bedrooms: 2 access available for delivery of fuel: yes mains gas available: no how became interested in biomass system: reduce bills quote requested on domestic biomass heating system, to be supplied and fitted. are you the property owner: owner

    • property type detached
    • age of boiler 10+ years
    • is your boiler solid fuel
  2. March 2026SA73

    REPLACE WORCESTER 24 CDI Like for like

  3. January 2025S9

    Customer in the Sheffield area made an enquiry online for a new boiler and is waiting for a call. Confirmed interest. Please contact to arrange an appointment to discuss options for their home.

Enquiries submitted through LeadsDoWork in the last two years. Shown to give a sense of the work people in Wales are having done – they are not reviews, and no rating is implied.

Vaillant is a trade mark of its owner, named above in a homeowner's own words. CombiBoiler.net is independent and is not affiliated with, sponsored or endorsed by any manufacturer. See how we make money.

Recent boiler installation enquiries in Wales

What people in Wales have actually asked for, in their own words. Names, contact details and street addresses are not shown.

  1. March 2026SA73

    REPLACE WORCESTER 24 CDI Like for like

  2. January 2025S9

    Customer in the Sheffield area made an enquiry online for a new boiler and is waiting for a call. Confirmed interest. Please contact to arrange an appointment to discuss options for their home.

Enquiries submitted through LeadsDoWork in the last two years. Shown to give a sense of the work people in Wales are having done – they are not reviews, and no rating is implied.

Vaillant is a trade mark of its owner, named above in a homeowner's own words. CombiBoiler.net is independent and is not affiliated with, sponsored or endorsed by any manufacturer. See how we make money.

Recent boiler service enquiries in Wales

What people in Wales have actually asked for, in their own words. Names, contact details and street addresses are not shown.

  1. October 2025BS22

    Gas boiler requires servicing

Enquiries submitted through LeadsDoWork in the last two years. Shown to give a sense of the work people in Wales are having done – they are not reviews, and no rating is implied.

Worcester Bosch and Baxi are trade marks of their respective owners, named above in a homeowner's own words. CombiBoiler.net is independent and is not affiliated with, sponsored or endorsed by any manufacturer. See how we make money.

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Worcester Bosch, Vaillant and Viessmann are trade marks of their respective owners. CombiBoiler.net is independent and is not affiliated with, sponsored or endorsed by any manufacturer. We name brands only to help you compare like with like; see how we make money.