Combi Boiler Price Comparison

Are you interested in getting a combi boiler fitted in your property? Then you have loads of different brands and options to pick from as combination boilers are the most common boiler in homes across the UK. Some of the brand options you have available to you include: Worcester Bosch, Vaillant, Vokera, Baxi, Ideal and so many more, each of these options have their own pro’s & con’s.

How do combi boilers work?

Combi boilers work by having a single compact system which heats your hot water and pushes the heat through your radiators with no need for a hot water cylinder or cold-water tank. This boiler type provides instant hot water as soon as you turn the tap on.

Modern combi boilers are usually condensing boilers which are designed to make them effective and energy efficient. A condensing boiler makes more use of the energy it uses as it extracts the heat from the flue which means that it loses less energy than a non-condensing boiler.

Combi boilers contain control valves which operate in various directions, this allows water to flow through either the central heating system or determines if it should be diverted to the appropriate hot water tap, but the limitation is that you can never have both at the same time.

New combi boiler price range (£499 - £2,850.06*)

As combi boilers are the most popular type of boiler in homes across the UK there are loads of different models & brands to choose from. Out of the brands we have featured, which include Biasi, Vokera, Potterton, Ferroli, Glow-Worm, Alpha, Worcester Bosch & more, we have managed to provide a price range for the base boiler, without installation.

The base combi boiler range starts with the price of £499 with the Vokera Compact 25A which has a two-year warranty & the most expensive of the range model is the Viessmann Vitodens 222-F 35kW Storage with a 5-year warranty priced at £2,850.06.

Combi boiler: Why should you get one?

Are you looking to switch to a combi boiler from another system type? We have outlined a few advantages of getting a combi boiler to help you make your decision:

Combi boilers are more compact and space saving

Designed to be more efficient than older boiler models due to the condensing technology

Hot water is provided faster and it’s unlimited, as long as there is a gas supply

Typically cheaper as they are less complex, they are typically cheaper to install as well due to their size

Due to their popularity they're typically easier to service and repair

Compare Combi boiler prices

BrandModel NameTypeFuelkWWarrantyExample Price*
(Including VAT)
VokeraCompact 25ACombiGas25kw5£499
VokeraCompact 29ACombiGas29kw5£539
AlphaE-TEC 28CombiGas28kw5£562.80
Glow-WormEasicom3CombiGas24kW3£594.95
AlphaE-TEC 33CombiGas33kw5£598.80
VokeraVision 25cCombiGas25kw7£602
AlphaInTec 24XCombiGas24kW2£604.8
IdealIndependent C24CombiGas24kW5£625.36
Glow-WormEasicom3CombiGas28kW3£632.85
Baxi224CombiGas24kW3£633.36
BiasiInovia 25CCombiGas25kW5£636
VokeraVision 30cCombiGas30kw7£638
AlphaInTec2 28XECombiGas28kw7£642
PottertonGold 24CombiGas24kW2£653.42
Baxi228CombiGas28kW3£656.23
BiasiAdvance Plus 7 25CCombiGas26.6kW7£659.99
BiasiInovia 30CCombiGas30kW5£660
FerroliModena 27c HECombiGas27kw5£665.91
IdealIndependent C30CombiGas30kW5£671.48
FerroliModena 32c HECombiGas32kW5£678.48
Baxi424CombiGas24kW3£689.44
BiasiAdvance Plus 7 30CCombiGas31.9kW7£699.99
IdealLogic ESP1 24CombiGas24kW2£704.18
VokeraUnica i28CombiGas28kw5£717
BiasiInovia 35CCombiGas35kW5£719.99
BiasiAdvance Plus 7 35CCombiGas36.4kW7£719.99
PottertonGold 28HECombiGas28kW2£724.13
Baxi428CombiGas28kW5£729.41
Glow-WormEnergy 25CombiGas25kW2£735.93
Glow-WormUltimate3CombiGas30kW5£738
IdealLogic 24CombiGas24kW2£743.39
IdealIndependent C35CombiGas35kW5£749.09
AlphaInTec 26CECombiGas26kW5£749.95
IdealIndependent Plus C24CombiGas24kW7£753.58
BaxiDuo-tec 24CombiGas24kW7£765.43
PottertonTitanium 24CombiGas24kW7£767.52
Glow-WormUltimate2 35CombiGas35kW2£774
IdealLogic Plus 24CombiGas24kW7£789.26
IdealLogic ESP1 30CombiGas30kW2£794.78
PottertonGold 33HECombiGas33kW2£794.83
VokeraUnica i32CombiGas32kw5£799.99
BaxiEcoBlue+ 24CombiGas24kW7£804.85
IdealIndependent Plus C30CombiGas30kW7£813.2
AlphaeTEC Plus 28CombiGas28kW5£826.8
Glow-WormEnergy 30CombiGas30kW2£827.76
IdealLogic 30CombiGas30kW2£829.5
PottertonTitanium 28CombiGas28kW7£829.92
AlphaInTec2 30CECombiGas30kw5£833.17
BaxiPlatinum 24CombiGas24kW10£833.62
VokeraEvolve 24CCombiGas24kw7£838.8
ViessmannBPJD Vitodens 050-W 29CombiGas29kW3£842.78
FerroliModena 38c HECombiGas38kw5£860.56
PottertonPromax Ultra 24CombiGas24kW2£863.68
ViessmannBPJD Vitodens 050-W 35CombiGas35kW3£870.44
VaillantEcoFIT pure 825CombiGas25kW2£874.74
VokeraEvolve 28CCombiGas28kW7£874.8
IdealLogic Plus 30CombiGas30kW7£878.93
VokeraUnica i36CombiGas36kW5£885
BaxiEcoBlue+ 28CombiGas28kW7£885.12
IdealIndependent Plus C35CombiGas35kW7£890.81
PottertonTitanium 33CombiGas33kW7£892.32
VokeraEvolve 32CCombiGas32kW7£898.8
AlphaInTec2 35CECombiGas35kw5£898.81
IdealLogic ESP1 35CombiGas35kW2£907.91
AlphaInTec2 26CECombiGas26kw5£908.28
AlphaeTEC Plus 33CombiGas33kW5£910.8
BaxiDuo-tec 28CombiGas28kW7£925.59
AristonClas One 24CombiGas24kW8£930.95
IdealLogic 35CombiGas35kW2£937.55
Glow-WormEnergy 35CombiGas35kW5£940.21
BaxiDuo-Tec 40CombiGas40kW7£940.4
Glow-WormEnergy 35CombiGas35kW2£940.5
IdealVogue C26 Gen2CombiGas26kW8£948.16
BaxiEcoBlue Advance 24CombiGas24kW10£955.05
PottertonTitanium 40CombiGas40kW7£967.2
PottertonPromax 28CombiGas28kW2£968.33
VaillantEcoFIT pure 830CombiGas30kW2£974.18
BaxiPlatinum 28CombiGas28kW10£976.6
VaillantecoTEC Pro 24CombiGas24kW5£980
IdealLogic Plus 35CombiGas35kW7£987.95
VokeraEvolve 36CCombiGas36kW7£994.8
IdealVogue C26 Gen2CombiGas26kW8£1003.08
Worcester-BoschGreenstar 25iCombiGas25kW5£1008.74
AristonClas One 30CombiGas30kW8£1012.95
BaxiDuo-tec 33CombiGas33kW7£1029.59
IdealVogue C32 Gen2CombiGas32kW8£1035.25
ViessmannB1KC Vitodens 100-W 26CombiGas26kW5£1044.58
BaxiDuo-TecCombiGas33kW7£1045.86
VaillantecoTEC Pro 28CombiGas28kW5£1058
Worcester-BoschGreenstar 28CDi CompactCombiGas28kW5£1062.53
VokeraLinea One 38CombiGas38kw5£1069.99
VaillantecoTEC Pro 30CombiGas30kW5£1083.29
Worcester-BoschGreenstar 25Si CompactCombiGas25kW5£1084.16
ViessmannB1KC Vitodens 100-W 30CombiGas30kW5£1092.2
VaillantecoTEC Plus 825CombiGas25.4kW5£1095.27
BaxiPlatinum 33CombiGas33kW10£1097.87
BaxiEcoblue Advance 28CombiGas28kW10£1098.51
Worcester-BoschGreenstar 29CDi ClassicCombiGas29kW5£1110.88
IdealVogue C32 Gen2CombiGas32kW8£1113.86
Worcester-BoschGreenstar 30SiCombiGas30kW5£1126.84
BaxiDuo-tec 40CombiGas40kW7£1133.59
IdealVogue C40 Gen2CombiGas40kW8£1134.48
VaillantecoFIT 835CombiGas35kW5£1145.09
AristonClas One 38CombiGas38kW8£1149.95
ViessmannVitodens 100-WCombiGas35kW5£1153.26
Worcester-BoschGreenstar 32CDiCombiGas32kW5£1190.18
BaxiPlatinum 40CombiGas40kW10£1205.12
VaillantecoTEC Plus 832CombiGas32kW5£1207.79
BaxiEcoblue Advance 33CombiGas33kW10£1217.09
IdealVogue C40 Gen2CombiGas40kW8£1230.78
Worcester-BoschGreenstar 34CDiCombiGas34kW5£1234.3
BaxiEcoblue Advance 40CombiGas40kW10£1282.46
VaillantecoTEC Plus 835CombiGas35kW5£1282.92
IdealLogic Code ESP1CombiGas26kW2£1287.38
Worcester-BoschGreenstar 36CDiCombiGas36kW5£1313.04
AristonClas Net One 24CombiGas24kW12£1314.95
IdealLogic Code ESP1CombiGas33kW2£1388.48
Worcester-BoschGreenstar 38CDiCombiGas38kW5£1389.03
AristonClas Net One 30CombiGas30kW12£1409.95
AristonClas Net One 38CombiGas38kW12£1505.95
ViessmannVitodens 111-WCombiGas26kW5£1516.17
VaillantecoTEC Plus 938CombiGas38.7kW5£1530.98
IdealLogic Code ESP1CombiGas38kW2£1551.09
VaillantecoTEC 835CombiGas35kW5£1586.43
ViessmannVitodens 111-WCombiGas35kW5£1630.02
Worcester-BoschGreenstar 42CDiCombiGas42kW5£1668.21
VaillantecoTEC 843CombiGas43kW5£1916.94
Worcester-BoschGreenstar Highflow 440CDiCombiGas29.2kW5£2003.14
AlphaInTec 30GSCombiGas30kW5£2106.02
Worcester-BoschGreenstar Heatslave II 18-25CombiOil18-25kW2£2411.28
Worcester-BoschGreenstar Highflow 550CDiCombiGas30.6kW5£2434.58
ViessmannVitodens 222-FCombiGas19kW3£2702.88
Worcester-BoschGreenstar Heatslave II 18-25 ExternalCombiOil18-25kW2£2747.34
ViessmannVitodens 222-FCombiGas26kW3£2785.38
Worcester-BoschGreenstar Heatslave II 25-32CombiOil25-32kW2£2798.48
ViessmannVitodens 222-FCombiGas35kW3£2850.06

Combi boiler installation costs

The cost of installing a combi boiler varies massively dependant on your situation and choice of boiler amongst several other factors. As there are so many different factors to installing a combi boiler it can be hard to determine the cost without having a surveyor visit your property, we've put toghet a list of a few of the factors that can potential change the price:

• If you're planning a combi-combi swap it should keep prices down. If you are swapping different boiler types it can be more expensive, you may require more parts and additional labour

• As with changing any boiler you may require extra parts like a new gas pipe, a condensate pipe and if your flue needs to move, you might need scaffolding.

• If you are moving the boilers location, it may cost more.

• Different combi boiler brands can be easier to install than others.

• The install price can also be determined by your location and how in demand the boiler installers can be in your area.

What combi boiler is right for my household?

There are combi boilers of all shapes and sizes suitable for all types of properties from a little one bedroom flat to large commercial property. When looking at what combi boiler to get the best suited boiler for your property is usually determind by the KW output. The number of bathrooms & radiators on a property will determine the kW output boiler that you need.

We have put together a small guide of what kW output could potentially be required, which is determined by the size of your property:

24-27kW28-34kW35-42kW
1-2 bedroom3-4 bedroom4+ bedrooms
10 radiators15 radiators20 radiators
1 bathroom1-2 bathrooms2+ bathrooms

(This information has been supplied by Help-Link UK limited and has been produced for information purposes only and should not be used or relied upon as a substitute for professional advice by a suitably qualified engineer.)

* Prices correct as of 3rd September 2018 from the list of suppliers