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Get quotes for a new boiler

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Want to know how much it costs to buy and install new combi or system boilers?

See the trade cost for combi & system boilers and how much local heating companies near you will charge for installing your new boiler (whether it is a like for like combi swap or installing a system boiler in a new location).

What are combi boilers?

Combi boilers (combination boilers) are compact small boilers which both heat water directly which comes out of your hot taps and also send hot central heating water to your radiators to heat your home.

How do combi boilers work?

To get your radiators hot the system water in your home's radiators and pipes is circulated using a pump through the combi boiler’s main heat exchanger which is heated by a gas burner.

When you turn on a hot water tap or shower a flow sensor tells the combi boiler’s diverter valve to redirect the heated system water internally through a second ‘plate to plate’ heat exchanger which indirectly heats up mains water and in seconds sends the now hot mains water to your hot tap or shower.

Why are combi boilers so popular?

No space needed for hot water cylinders or water tanks, low cost, range of out-puts to suit all properties, simple to install, maintain - all persuasive reasons why combi boilers are the number one choice when UK homeowners buy a new boiler.

What are system boilers and how do they work?

System boilers are a great solution for large family homes as they provide a constant supply of hot water for baths, showers and washing up. A system boiler works by filling a large, insulated storage cylinder with hot water so there is a constant supply of hot water ready to be used at any time.

 

How much do Worcester Bosch combi boilers cost (trade ex VAT)?

Greenstar 2000 Combi boiler (25/30kw); Suitable for one bathroom small to medium homes, fits between standard kitchen cabinets. Quietest in range, efficient and guarantee ranging from 5 – 6 years.

Greenstar 4000 Combi boiler (25/30kw); Ideal for small to medium homes with one bathroom. Modern design, easy to use colour display, efficient, quiet and guarantee ranging from 7 - 8 years.

Greenstar Si Compact Combi boiler (25/30kw); Suitable for small to medium homes with one bathroom, fits into a standard kitchen cupboard, easy to use controls and guarantee ranging from 7 – 8 years.

Greenstar CDi Compact combi boiler (28/32/36kw); suitable for small, medium and large-sized properties with one or two bathrooms. Compact enough to fit into a standard kitchen cupboard but powerful enough for homes with more than one bathroom. Guarantee ranging from 7 - 8 years.

Greenstar 8000 Life Combi boiler (30/35/40/45/50kw); most powerful wall hung combi boiler range with a modern design, wireless connectivity and guarantee ranging from 8 – 10 years.

Greenstar 8000 Style Combi boiler (30/35/40/45/50kw); Top of the range, look like huge black or white wall hung iPhones, connected technology and power to comfortably heat large homes with two or more bathrooms. Guarantee ranging from 8 – 10 years.

 

Worcester Bosch
Combi Boilers

Boiler Cost

Greenstar 2000 25kw combi

£600

Greenstar 2000 30kw combi

£700

Greenstar 4000 25kw combi

£820

Greenstar 4000 30kw combi

£920

Greenstar 25Si Compact Combi

£900

Greenstar 30Si Compact Combi

£1,000

Greenstar 28CDi Compact Combi

£800

Greenstar 30CDi Compact Combi

£900

Greenstar 32CDi Compact Combi

£1,050

Greenstar 8000 Life 30 Combi

£1,040

Greenstar 8000 Life 35 Combi

£1,150

Greenstar 8000 Life 40 Combi

£1,300

Greenstar 8000 Life 45 Combi

£1,550

Greenstar 8000 Life 50 Combi

£1,800

Greenstar 8000 Style 30 Combi (Black or White)

£1,100

Greenstar 8000 Style 30 Combi (Black or White)

£1,200

Greenstar 8000 Style 30 Combi (Black or White)

£1,350

Greenstar 8000 Style 30 Combi (Black or White)

£1,600

Greenstar 8000 Style 30 Combi (Black or White)

£1,850

 

 

How much do Worcester Bosch system boilers cost (trade ex VAT) ?

Greenstar 4000 System boiler (12/15/18/21/24kw); Suitable for one bathroom small to medium homes. Modern design, quiet, easy to use colour display and guarantee ranging from 7 – 8 years.

Greenstar I System boiler (27/30kw); Small but powerful, suitable for small, medium and large homes whilst fitting into a standard kitchen cupboard, easy to use controls and guarantee ranging from 7 – 8 years.

Greenstar 8000 Life System boiler (30/35kw); most powerful wall hung system boiler range with a modern design, wireless connectivity and guarantee ranging from 8 – 10 years.

Greenstar 8000 Style System boiler (30/35kw); Top of the range, look like huge black or white wall hung iPhones, connected technology and power to comfortably heat large homes with two or more bathrooms. Guarantee ranging from 8 – 10 years.

 

Worcester Bosch
System Boilers

Boiler Cost

Greenstar 4000 12kw System

£800

Greenstar 4000 15kw System

£850

Greenstar 4000 18kw System

£880

Greenstar 4000 21kw System

£890

Greenstar 4000 24kw System

£950

Greenstar 27i System

£940

Greenstar 30i System

£980

Greenstar 8000 Life 30 System

£1,060

Greenstar 8000 Life 35 System

£1,180

Greenstar 8000 Style 30 System

£1,150

Greenstar 8000 Style 35 System

£1,250

 

How much do Vaillant combi boilers cost (trade ex VAT) ?

ecoFIT pure combi (25/30/35kw); compact to fit in a cupboard so suitable for small homes. Efficient, quiet, smart controls and guarantee ranging from 2-10 years.

ecoTEC pro combi (24/28/30kw); smart boiler for small to medium homes. Full range of thermostat controls (from analogue timers to ySMART app controlled) and 2-10 years guarantee.

ecoTEC plus combi (25/32/35/38kw); high performance, precision control and efficiency suitable for any home and 5-10 years guarantee.

ecoTEC Green iQ combi (35/43kw); best in range for efficiency and control, fully compatible with vSMART app, 85% recyclable and 5-10 years guarantee.

 

Vaillant
Combi Boilers

Boiler Cost

ecoFIT pure 825 combi

£760

ecoFIT pure 830 combi

£865

ecoFIT pure 835 combi

£970

ecoTEC Pro 24 combi

£850

ecoTEC Pro 28 combi

£950

ecoTEC Pro 30 combi

£1,000

ecoTEC Plus 825 combi

£1,000

ecoTEC Plus 832 combi

£1,100

ecoTEC Plus 835 combi

£1,170

ecoTEC Plus 838 combi

£1,260

ecoTEC Plus 938 combi

£1,400

ecoTEC Green iQ 835 combi

£1,250

ecoTEC Green iQ 843 combi

£1,460

 

How much do Vaillant system boilers cost (trade ex VAT) ?

ecoFIT pure system (12/15/18/25/30kw); compact to fit in a cupboard so suitable for small homes. Efficient, quiet, smart controls and 2-10 years guarantee.

ecoTEC plus system (12/15/18/24/30/37kw); high performance, precision control and efficiency suitable for any home and 5-10 years guarantee.

ecoTEC Green iQ system (27kw); best in range for efficiency and control, fully compatible with vSMART app, 85% recyclable and 5-10 years guarantee.

 

Vaillant
System Boilers

Boiler Cost

ecoFIT pure 612 system

£730

ecoFIT pure 615 system

£800

ecoFIT pure 618 system

£865

ecoFIT pure 625 system

£1,000

ecoFIT pure 630 system

£1,060

ecoTEC plus 612 system

£780

ecoTEC plus 615 system

£840

ecoTEC plus 618 system

£920

ecoTEC plus 624 system

£1,050

ecoTEC plus 630 system

£1,150

ecoTEC plus 637 system

£1,270

ecoTEC Green iQ 627 system

£1,150

 

Boiler installation steps

There is more to getting a new boiler than choosing a brand, boiler type and then getting a gas safe registered engineer to fit your new boiler to the wall.

  • Powerflush existing system using old boiler to clean out corrosion debris. The existing radiators and pipes will have corrosion debris in them which needs to be cleaned out so it doesn’t clog up the highly efficient low water content (ie very small holes) heat exchanger in your new boiler
  • Remove old boiler – say goodbye to your old faithful boiler (hanky handy for tears). Your old boiler may have been bigger, had pipes running in different directions and so some making good of cabinets or walls may be required.
  • New location or configuration will require adapting pipes, flue to suit new boiler. Different boilers have pipes coming and going from different positions and so some local alignment of pipes and flue may be required.
  • Fit new boiler. The big event….up goes the new shiny white box onto the frame and make all the connections (power supply, gas, mains water in, flow and return pipes, hot water out, flue, pressure relief pipe….anything else?).
  • Recommend extras to customer; corrosion debris filter, limescale inhibitor, smart controls, system corrosion inhibitor, bleed radiators, top up system pressure
  • Commission whole central heating system, explain to customer how to top up pressure, bleed radiators, set timer/thermostat/controls
  • Register new boiler for Gas Safe Register and manufacturer warranty

 

Extra costs to consider when getting a new boiler

Replace radiators £160-320
Add radiators £260-380
Powerflush radiators and pipes £250-800
Fit water tanks £135-180
Fit new central heating pipework £750-1,100
Install thermostat controls £120-250

Rates for other trades

Boiler Installation Costs in the UK
Boiler Installation Cost(excluding VAT or callout charges)
Location in UKSame locationNew location
New Boiler Cost near Aberdeen £280 £560
New Boiler Cost near Amber Valley £242 £484
New Boiler Cost near Angus £270 £540
New Boiler Cost near Arun £280 £560
New Boiler Cost near Ashfield £238 £476
New Boiler Cost near Aylesbury Vale £283 £566
New Boiler Cost near Barnsley £230 £460
New Boiler Cost near Basildon £265 £530
New Boiler Cost near Basingstoke & Deane £269 £538
New Boiler Cost near Bassetlaw £241 £482
New Boiler Cost near Bath & North East Somerset £254 £508
New Boiler Cost near Bedford £280 £560
New Boiler Cost near Belfast £209 £418
New Boiler Cost near Birmingham £231 £462
New Boiler Cost near Blackburn £238 £476
New Boiler Cost near Blackpool £243 £486
New Boiler Cost near Bolton £245 £490
New Boiler Cost near Bournemouth £271 £542
New Boiler Cost near Bracknell Forest £282 £564
New Boiler Cost near Bradford £233 £466
New Boiler Cost near Braintree £259 £518
New Boiler Cost near Breckland £242 £484
New Boiler Cost near Bridgend £224 £448
New Boiler Cost near Brighton £265 £530
New Boiler Cost near Bristol £248 £496
New Boiler Cost near Broadland £266 £532
New Boiler Cost near Broxtowe £238 £476
New Boiler Cost near Bury £243 £486
New Boiler Cost near Caerphilly £222 £444
New Boiler Cost near Calderdale £228 £456
New Boiler Cost near Cambridge £272 £544
New Boiler Cost near Canterbury £239 £478
New Boiler Cost near Cardiff £227 £454
New Boiler Cost near Carmarthenshire £199 £398
New Boiler Cost near Charnwood £228 £456
New Boiler Cost near Chelmsford £260 £520
New Boiler Cost near Cheltenham £307 £614
New Boiler Cost near Cherwell £277 £554
New Boiler Cost near Chester £218 £436
New Boiler Cost near Colchester £255 £510
New Boiler Cost near Conway £204 £408
New Boiler Cost near Coventry £233 £466
New Boiler Cost near Crewe & Nantwich £233 £466
New Boiler Cost near Dacorum £278 £556
New Boiler Cost near Derby £232 £464
New Boiler Cost near Doncaster £239 £478
New Boiler Cost near Dover £234 £468
New Boiler Cost near Dudley £231 £462
New Boiler Cost near Dumfries & Galloway £252 £504
New Boiler Cost near Dundee £274 £548
New Boiler Cost near East Ayrshire £190 £380
New Boiler Cost near East Devon £247 £494
New Boiler Cost near East Dunbartonshire £280 £560
New Boiler Cost near East Hampshire £269 £538
New Boiler Cost near East Hertfordshire £276 £552
New Boiler Cost near East Lindsey £219 £438
New Boiler Cost near East Riding £196 £392
New Boiler Cost near Eastleigh £276 £552
New Boiler Cost near Edinburgh £251 £502
New Boiler Cost near Elmbridge £289 £578
New Boiler Cost near Epping Forest £292 £584
New Boiler Cost near Erewash £234 £468
New Boiler Cost near Exeter £257 £514
New Boiler Cost near Falkirk £272 £544
New Boiler Cost near Fife £261 £522
New Boiler Cost near Flintshire £226 £452
New Boiler Cost near Gateshead £268 £536
New Boiler Cost near Gedling £235 £470
New Boiler Cost near Glasgow £275 £550
New Boiler Cost near Gloucester £319 £638
New Boiler Cost near Guildford £294 £588
New Boiler Cost near Gwynedd £232 £464
New Boiler Cost near Halton £236 £472
New Boiler Cost near Harrogate £228 £456
New Boiler Cost near Havant & Waterloo £265 £530
New Boiler Cost near Highland £320 £640
New Boiler Cost near Horsham £268 £536
New Boiler Cost near Huntingdonshire £266 £532
New Boiler Cost near Ipswich £303 £606
New Boiler Cost near Isle of Wight £257 £514
New Boiler Cost near Kings Lynn & West Norfolk £260 £520
New Boiler Cost near Kingston-upon-Hull £196 £392
New Boiler Cost near Kirklees £229 £458
New Boiler Cost near Knowsley £231 £462
New Boiler Cost near Lancaster £257 £514
New Boiler Cost near Leeds £228 £456
New Boiler Cost near Leicester £230 £460
New Boiler Cost near Lisburn £209 £418
New Boiler Cost near Liverpool £234 £468
New Boiler Cost near London £287 £574
New Boiler Cost near Luton £284 £568
New Boiler Cost near Macclesfield £239 £478
New Boiler Cost near Maidstone £255 £510
New Boiler Cost near Manchester £237 £474
New Boiler Cost near Mid Bedfordshire £276 £552
New Boiler Cost near Mid Sussex £274 £548
New Boiler Cost near Middlesbrough £244 £488
New Boiler Cost near Milton Keynes £283 £566
New Boiler Cost near Neath Port Talbot £227 £454
New Boiler Cost near New Forest £269 £538
New Boiler Cost near Newbury £274 £548
New Boiler Cost near Newcastle-under-Lyme £221 £442
New Boiler Cost near Newcastle-upon-Tyne £270 £540
New Boiler Cost near Newport £228 £456
New Boiler Cost near North Ayrshire £224 £448
New Boiler Cost near North East Lincolnshire £249 £498
New Boiler Cost near North Hertfordshire £278 £556
New Boiler Cost near North Lanarkshire £277 £554
New Boiler Cost near North Lincolnshire £215 £430
New Boiler Cost near North Somerset £242 £484
New Boiler Cost near North Tyneside £268 £536
New Boiler Cost near North Wiltshire £310 £620
New Boiler Cost near Northampton £272 £544
New Boiler Cost near Norwich £259 £518
New Boiler Cost near Nottingham £232 £464
New Boiler Cost near Nuneaton & Bedworth £230 £460
New Boiler Cost near Oldham £243 £486
New Boiler Cost near Oxford £281 £562
New Boiler Cost near Pembrokeshire £204 £408
New Boiler Cost near Perth & Kinross £270 £540
New Boiler Cost near Peterborough £266 £532
New Boiler Cost near Plymouth £246 £492
New Boiler Cost near Poole £270 £540
New Boiler Cost near Portsmouth £262 £524
New Boiler Cost near Powys £308 £616
New Boiler Cost near Preston £245 £490
New Boiler Cost near Reading £283 £566
New Boiler Cost near Redcar & Cleveland £234 £468
New Boiler Cost near Reigate & Banstead £288 £576
New Boiler Cost near Renfrewshire £266 £532
New Boiler Cost near Rhondda, Cynon, Taff £212 £424
New Boiler Cost near Rochdale £241 £482
New Boiler Cost near Rochester-upon-Medway £280 £560
New Boiler Cost near Rotherham £234 £468
New Boiler Cost near Salford £237 £474
New Boiler Cost near Salisbury £251 £502
New Boiler Cost near Sandwell £230 £460
New Boiler Cost near Scarborough £242 £484
New Boiler Cost near Scottish Borders £370 £740
New Boiler Cost near Sefton £233 £466
New Boiler Cost near Sevenoaks £268 £536
New Boiler Cost near Sheffield £239 £478
New Boiler Cost near Slough £286 £572
New Boiler Cost near Solihull £231 £462
New Boiler Cost near South Ayrshire £227 £454
New Boiler Cost near South Bedfordshire £280 £560
New Boiler Cost near South Cambridgeshire £263 £526
New Boiler Cost near South Gloucestershire £250 £500
New Boiler Cost near South Kesteven £260 £520
New Boiler Cost near South Lanarkshire £275 £550
New Boiler Cost near South Oxfordshire £273 £546
New Boiler Cost near South Somerset £263 £526
New Boiler Cost near South Tyneside £267 £534
New Boiler Cost near Southampton £273 £546
New Boiler Cost near Southend-on-Sea £255 £510
New Boiler Cost near St Albans £289 £578
New Boiler Cost near St Helens £231 £462
New Boiler Cost near Stafford £232 £464
New Boiler Cost near Stockport £240 £480
New Boiler Cost near Stockton-on-Tees £246 £492
New Boiler Cost near Stoke-on-Trent £221 £442
New Boiler Cost near Stratford-on-Avon £246 £492
New Boiler Cost near Stroud £285 £570
New Boiler Cost near Suffolk Coastal £320 £640
New Boiler Cost near Sunderland £267 £534
New Boiler Cost near Swale £252 £504
New Boiler Cost near Swansea £223 £446
New Boiler Cost near Tameside £238 £476
New Boiler Cost near Teignbridge £252 £504
New Boiler Cost near Tendring £287 £574
New Boiler Cost near Test Valley £261 £522
New Boiler Cost near Thamesdown £310 £620
New Boiler Cost near Thanet £248 £496
New Boiler Cost near The Wrekin £254 £508
New Boiler Cost near Thurrock £267 £534
New Boiler Cost near Torbay £250 £500
New Boiler Cost near Trafford £240 £480
New Boiler Cost near Vale of Glamorgan £224 £448
New Boiler Cost near Vale of White Horse £285 £570
New Boiler Cost near Vale Royal £224 £448
New Boiler Cost near Wakefield £233 £466
New Boiler Cost near Walsall £229 £458
New Boiler Cost near Warrington £243 £486
New Boiler Cost near Warwick £239 £478
New Boiler Cost near Waveney £253 £506
New Boiler Cost near Waverley £284 £568
New Boiler Cost near Wealden £270 £540
New Boiler Cost near West Lancashire £235 £470
New Boiler Cost near West Lothian £270 £540
New Boiler Cost near West Wiltshire £310 £620
New Boiler Cost near Wigan £235 £470
New Boiler Cost near Windsor & Maidenhead £284 £568
New Boiler Cost near Wirral £231 £462
New Boiler Cost near Wokingham £284 £568
New Boiler Cost near Wolverhampton £230 £460
New Boiler Cost near Wrexham Maelor £283 £566
New Boiler Cost near Wychavon £266 £532
New Boiler Cost near Wycombe £290 £580
New Boiler Cost near York £228 £456