Compare boilers

Compare boilers, side by side.

Filter by fuel, type, brand and the size of your house. Pick up to four and we'll line them up on the things that actually matter: output, hot water flow, warranty and what the market charges to fit them.

Every price here is a market range, not a quote.

It is what installers across the UK typically charge to fit that model, boiler and labour included. What it costs in your house depends on your pipework, your flue and who does the work — which is exactly why you want three quotes rather than one number off a website.

Every price here is a market range, not a quote. It is what installers across the UK typically charge to fit that model, boiler and labour included. What it costs in your house depends on your pipework, your flue and who does the work — which is exactly why you want three quotes rather than one number off a website.

79 boilers match

Longest warranty first

ATAG

iC Economiser 27

A · 94%

Output: 27 kW
Hot water: 11.4 l/min
Warranty: 14 yr
Type: Combi

Typical fitted: £2,300 – £3,000

The longest warranty on the market

ATAG

iC 40

A · 94%

Output: 40 kW
Hot water: 16.4 l/min
Warranty: 14 yr
Type: Combi

Typical fitted: £2,700 – £3,500

14-year warranty and a big output

ATAG

iC 32

A · 94%

Output: 32 kW
Hot water: 13.1 l/min
Warranty: 14 yr
Type: Combi

Typical fitted: £2,450 – £3,200

14-year warranty, mid output

Worcester Bosch

Greenstar 4000 30kW

A · 94%

Output: 30 kW
Hot water: 12.3 l/min
Warranty: 12 yr
Type: Combi

Typical fitted: £2,300 – £2,900

The long warranty, and engineers everywhere know them

Worcester Bosch

Greenstar 8000 Life 35kW

A · 94%

Output: 35 kW
Hot water: 14.3 l/min
Warranty: 12 yr
Type: Combi

Typical fitted: £2,900 – £3,600

Big houses, two bathrooms, strong showers

Worcester Bosch

Greenstar 8000 System 30kW

A · 94%

Output: 30 kW
Hot water: Cylinder
Warranty: 12 yr
Type: System

Typical fitted: £2,600 – £3,400

Keeping a cylinder, losing the loft tanks

Ideal

Vogue Max Combi C40

A · 94%

Output: 40 kW
Hot water: 16.4 l/min
Warranty: 12 yr
Type: Combi

Typical fitted: £2,700 – £3,500

Serious hot water demand

Viessmann

Vitodens 200-W 35kW

A · 94%

Output: 35 kW
Hot water: 14.5 l/min
Warranty: 12 yr
Type: Combi

Typical fitted: £3,000 – £3,800

Best-in-class efficiency, if you'll pay for it

Navien

NCB700 ON 36kW

A · 94%

Output: 36 kW
Hot water: 15.1 l/min
Warranty: 12 yr
Type: Combi

Typical fitted: £2,100 – £2,800

Big output for the money

Worcester Bosch

Greenstar 4000 25kW

A · 94%

Output: 25 kW
Hot water: 10.2 l/min
Warranty: 12 yr
Type: Combi

Typical fitted: £2,100 – £2,700

Smaller homes that still want the 12-year warranty

Worcester Bosch

Greenstar 8000 Life 30kW

A · 94%

Output: 30 kW
Hot water: 12.3 l/min
Warranty: 12 yr
Type: Combi

Typical fitted: £2,700 – £3,400

The flagship, quieter than most

Ideal

Vogue Max Combi C32

A · 94%

Output: 32 kW
Hot water: 13.1 l/min
Warranty: 12 yr
Type: Combi

Typical fitted: £2,500 – £3,200

Ideal's premium line, 12-year cover

Alpha

E-Tec Plus 33

A · 94%

Output: 33 kW
Hot water: 13.6 l/min
Warranty: 12 yr
Type: Combi

Typical fitted: £2,000 – £2,700

12-year warranty at a mid price

Navien

NCB700 ON 24kW

A · 94%

Output: 24 kW
Hot water: 10.1 l/min
Warranty: 12 yr
Type: Combi

Typical fitted: £1,800 – £2,400

12-year cover at a budget price

Worcester Bosch

Greenstar 8000 Style 35kW

A · 94%

Output: 35 kW
Hot water: 14.3 l/min
Warranty: 12 yr
Type: Combi

Typical fitted: £2,900 – £3,700

Black or white front, if it's on show

Worcester Bosch

Greenstar 8000 Life 35kW System

A · 94%

Output: 35 kW
Hot water: Cylinder
Warranty: 12 yr
Type: System

Typical fitted: £2,900 – £3,700

Large cylinder homes

Ideal

Vogue Max System S32

A · 94%

Output: 32 kW
Hot water: Cylinder
Warranty: 12 yr
Type: System

Typical fitted: £2,600 – £3,300

12-year cover with a cylinder

Viessmann

Vitodens 200-W 32kW

A · 94%

Output: 32 kW
Hot water: 13.2 l/min
Warranty: 12 yr
Type: Combi

Typical fitted: £2,900 – £3,800

Their flagship, modulates very low

Alpha

E-Tec Plus 28

A · 94%

Output: 28 kW
Hot water: 11.5 l/min
Warranty: 12 yr
Type: Combi

Typical fitted: £1,900 – £2,500

12 years, and it fits anywhere

Intergas

Xclusive 36

A · 94%

Output: 36 kW
Hot water: 15.1 l/min
Warranty: 12 yr
Type: Combi

Typical fitted: £2,400 – £3,100

Engineers rate these and rarely say so

Navien

NCB700 ON 30kW

A · 94%

Output: 30 kW
Hot water: 12.5 l/min
Warranty: 12 yr
Type: Combi

Typical fitted: £1,950 – £2,600

Long warranty, low price

Worcester Bosch

Greenstar 2000 25kW

A · 94%

Output: 25 kW
Hot water: 10.2 l/min
Warranty: 10 yr
Type: Combi

Typical fitted: £2,000 – £2,600

Worcester quality on a tighter budget

Vaillant

ecoTEC Plus 832

A · 94%

Output: 32 kW
Hot water: 13.1 l/min
Warranty: 10 yr
Type: Combi

Typical fitted: £2,500 – £3,200

The best shower in its class

Vaillant

ecoFIT Pure 830

A · 94%

Output: 30 kW
Hot water: 12.4 l/min
Warranty: 10 yr
Type: Combi

Typical fitted: £2,100 – £2,700

Vaillant engineering, less of the Vaillant price

Vaillant

ecoTEC Plus 825

A · 94%

Output: 25 kW
Hot water: 10.5 l/min
Warranty: 10 yr
Type: Combi

Typical fitted: £2,200 – £2,800

Flats and small houses that still want a good shower

Vaillant

ecoTEC Plus 618 System

A · 94%

Output: 18 kW
Hot water: Cylinder
Warranty: 10 yr
Type: System

Typical fitted: £2,400 – £3,100

Quiet, and very well made

Ideal

Logic Max Combi C30

A · 94%

Output: 30 kW
Hot water: 12.4 l/min
Warranty: 10 yr
Type: Combi

Typical fitted: £1,900 – £2,500

The value pick most installers rate

Ideal

Logic Max System S30

A · 94%

Output: 30 kW
Hot water: Cylinder
Warranty: 10 yr
Type: System

Typical fitted: £2,200 – £2,900

A cylinder house on a budget

Baxi

800 Combi 2 30kW

A · 94%

Output: 30 kW
Hot water: 12.2 l/min
Warranty: 10 yr
Type: Combi

Typical fitted: £1,900 – £2,500

British-built, easy to get parts for

Baxi

800 System 2 30kW

A · 94%

Output: 30 kW
Hot water: Cylinder
Warranty: 10 yr
Type: System

Typical fitted: £2,100 – £2,800

A like-for-like system swap

Viessmann

Vitodens 100-W 30kW

A · 94%

Output: 30 kW
Hot water: 12.6 l/min
Warranty: 10 yr
Type: Combi

Typical fitted: £2,200 – £2,900

German build, stainless heat exchanger

Alpha

E-Tec 33

A · 94%

Output: 33 kW
Hot water: 13.6 l/min
Warranty: 10 yr
Type: Combi

Typical fitted: £1,900 – £2,500

Slim - fits cupboards others don't

Intergas

Eco RF 30

A · 94%

Output: 30 kW
Hot water: 12.7 l/min
Warranty: 10 yr
Type: Combi

Typical fitted: £2,000 – £2,700

Fewest moving parts of any combi - less to break

Worcester Bosch

Greenstar 4000 30kW System

A · 94%

Output: 30 kW
Hot water: Cylinder
Warranty: 10 yr
Type: System

Typical fitted: £2,400 – £3,100

Cylinder homes, straightforward swap

Worcester Bosch

Greenstar 4000 30kW Regular

A · 93%

Output: 30 kW
Hot water: Cylinder
Warranty: 10 yr
Type: Regular

Typical fitted: £2,300 – £3,000

Like-for-like on an old gravity system

Vaillant

ecoTEC Plus 838

A · 94%

Output: 38 kW
Hot water: 15.6 l/min
Warranty: 10 yr
Type: Combi

Typical fitted: £2,800 – £3,600

Two bathrooms running at once

Vaillant

ecoFIT Pure 825

A · 94%

Output: 25 kW
Hot water: 10.2 l/min
Warranty: 10 yr
Type: Combi

Typical fitted: £1,950 – £2,550

Flats, and the price is fair

Vaillant

ecoTEC Plus 630 System

A · 94%

Output: 30 kW
Hot water: Cylinder
Warranty: 10 yr
Type: System

Typical fitted: £2,500 – £3,200

Bigger cylinder homes

Ideal

Logic Max Combi C35

A · 94%

Output: 35 kW
Hot water: 14.4 l/min
Warranty: 10 yr
Type: Combi

Typical fitted: £2,100 – £2,800

Big output, small cupboard

Ideal

Logic Max Heat H30

A · 94%

Output: 30 kW
Hot water: Cylinder
Warranty: 10 yr
Type: Regular

Typical fitted: £2,000 – £2,700

Keeping the loft tanks

Baxi

800 Combi 2 36kW

A · 94%

Output: 36 kW
Hot water: 15 l/min
Warranty: 10 yr
Type: Combi

Typical fitted: £2,100 – £2,800

Plenty of hot water for the money

Baxi

800 Heat 2 30kW

A · 94%

Output: 30 kW
Hot water: Cylinder
Warranty: 10 yr
Type: Regular

Typical fitted: £1,900 – £2,600

Traditional system, modern boiler

Viessmann

Vitodens 100-W 25kW

A · 94%

Output: 25 kW
Hot water: 10.5 l/min
Warranty: 10 yr
Type: Combi

Typical fitted: £2,050 – £2,700

German build in a smaller home

Viessmann

Vitodens 100-W 30kW System

A · 94%

Output: 30 kW
Hot water: Cylinder
Warranty: 10 yr
Type: System

Typical fitted: £2,400 – £3,100

Stainless exchanger, cylinder home

Glow-worm

Ultimate3 30c

A · 94%

Output: 30 kW
Hot water: 12.3 l/min
Warranty: 10 yr
Type: Combi

Typical fitted: £1,950 – £2,550

Longer warranty than the Energy line

Alpha

E-Tec 28

A · 94%

Output: 28 kW
Hot water: 11.5 l/min
Warranty: 10 yr
Type: Combi

Typical fitted: £1,800 – £2,400

The slimmest boiler most installers carry

Intergas

Eco RF 36

A · 94%

Output: 36 kW
Hot water: 15.2 l/min
Warranty: 10 yr
Type: Combi

Typical fitted: £2,200 – £2,900

Two moving parts. Genuinely.

Ariston

Clas ONE 30

A · 94%

Output: 30 kW
Hot water: 12.5 l/min
Warranty: 10 yr
Type: Combi

Typical fitted: £1,800 – £2,400

Quiet, and cheaper than the big names

Vaillant

ecoTEC Exclusive 835

A · 94%

Output: 35 kW
Hot water: 14.4 l/min
Warranty: 10 yr
Type: Combi

Typical fitted: £2,900 – £3,700

Self-diagnosing, top of the range

Vaillant

ecoTEC Plus 418 Regular

A · 94%

Output: 18 kW
Hot water: Cylinder
Warranty: 10 yr
Type: Regular

Typical fitted: £2,200 – £2,900

Smaller conventional systems

Ideal

Logic Max Combi C24

A · 94%

Output: 24 kW
Hot water: 9.8 l/min
Warranty: 10 yr
Type: Combi

Typical fitted: £1,800 – £2,400

Flats, and it fits a standard cupboard

Ideal

Logic Max System S30

A · 94%

Output: 30 kW
Hot water: Cylinder
Warranty: 10 yr
Type: System

Typical fitted: £2,000 – £2,700

Cylinder homes on a budget

Baxi

800 System 2 24kW

A · 94%

Output: 24 kW
Hot water: Cylinder
Warranty: 10 yr
Type: System

Typical fitted: £1,900 – £2,550

Smaller cylinder homes

Ariston

Clas ONE 24

A · 94%

Output: 24 kW
Hot water: 10 l/min
Warranty: 10 yr
Type: Combi

Typical fitted: £1,650 – £2,200

Quiet, cheap, decent cover

Ariston

Clas System ONE 30

A · 94%

Output: 30 kW
Hot water: Cylinder
Warranty: 10 yr
Type: System

Typical fitted: £1,800 – £2,400

Budget system boiler

ATAG

iS 24 System

A · 94%

Output: 24 kW
Hot water: Cylinder
Warranty: 10 yr
Type: System

Typical fitted: £2,200 – £2,900

ATAG with a cylinder

Ferroli

Bluehelix Maxima 32C

A · 94%

Output: 32 kW
Hot water: 13.1 l/min
Warranty: 10 yr
Type: Combi

Typical fitted: £1,750 – £2,350

Ferroli's serious one

Ideal

Logic Combi C24

A · 93%

Output: 24 kW
Hot water: 9.8 l/min
Warranty: 7 yr
Type: Combi

Typical fitted: £1,700 – £2,200

The cheapest sensible boiler for a flat

Baxi

600 Combi 2 24kW

A · 93%

Output: 24 kW
Hot water: 10.2 l/min
Warranty: 7 yr
Type: Combi

Typical fitted: £1,700 – £2,200

Straightforward, cheap, does the job

Viessmann

Vitodens 050-W 29kW

A · 93%

Output: 29 kW
Hot water: 11.8 l/min
Warranty: 7 yr
Type: Combi

Typical fitted: £1,900 – £2,500

The cheapest way into Viessmann

Glow-worm

Energy7 30c

A · 94%

Output: 30 kW
Hot water: 12.3 l/min
Warranty: 7 yr
Type: Combi

Typical fitted: £1,800 – £2,400

Vaillant's budget brand, and it shows in a good way

Glow-worm

Energy7 35c

A · 94%

Output: 35 kW
Hot water: 14.3 l/min
Warranty: 7 yr
Type: Combi

Typical fitted: £2,000 – £2,600

Big output on a modest budget

Potterton

Assure Combi 30

A · 94%

Output: 30 kW
Hot water: 12.2 l/min
Warranty: 7 yr
Type: Combi

Typical fitted: £1,750 – £2,300

Baxi's sister brand, cheaper badge

Viessmann

Vitodens 050-W 30kW

A · 93%

Output: 30 kW
Hot water: 12.3 l/min
Warranty: 7 yr
Type: Combi

Typical fitted: £1,850 – £2,450

Viessmann's budget line

Glow-worm

Energy 25s System

A · 94%

Output: 25 kW
Hot water: Cylinder
Warranty: 7 yr
Type: System

Typical fitted: £1,850 – £2,450

Cheap system swap

Alpha

E-Tec S 24 System

A · 94%

Output: 24 kW
Hot water: Cylinder
Warranty: 7 yr
Type: System

Typical fitted: £1,750 – £2,300

Slim system boiler

Potterton

Assure Combi 24

A · 93%

Output: 24 kW
Hot water: 10.1 l/min
Warranty: 7 yr
Type: Combi

Typical fitted: £1,600 – £2,150

Flats, cheap, Baxi parts

Potterton

Assure System 24

A · 93%

Output: 24 kW
Hot water: Cylinder
Warranty: 7 yr
Type: System

Typical fitted: £1,550 – £2,050

The cheapest way to keep a cylinder

Vokera

Evolve C 32

A · 94%

Output: 32 kW
Hot water: 13.1 l/min
Warranty: 7 yr
Type: Combi

Typical fitted: £1,750 – £2,300

Better Vokera, still cheap

Glow-worm

Betacom4 24kW

A · 93%

Output: 24 kW
Hot water: 9.8 l/min
Warranty: 5 yr
Type: Combi

Typical fitted: £1,600 – £2,100

Landlords and rentals

Baxi

400 Combi 24kW

A · 93%

Output: 24 kW
Hot water: 10.1 l/min
Warranty: 5 yr
Type: Combi

Typical fitted: £1,600 – £2,100

The budget end, done properly

Main

Eco Compact 30

A · 93%

Output: 30 kW
Hot water: 12.2 l/min
Warranty: 5 yr
Type: Combi

Typical fitted: £1,600 – £2,100

Rentals and tight budgets

Vokera

Easi-Heat Plus 29C

A · 93%

Output: 29 kW
Hot water: 11.9 l/min
Warranty: 5 yr
Type: Combi

Typical fitted: £1,600 – £2,150

Cheap, and widely serviced

Ferroli

Modena 32C

A · 93%

Output: 32 kW
Hot water: 13.1 l/min
Warranty: 5 yr
Type: Combi

Typical fitted: £1,500 – £2,000

The cheapest on this list. Engineers are divided.

Glow-worm

Betacom4 30c

A · 93%

Output: 30 kW
Hot water: 12.3 l/min
Warranty: 5 yr
Type: Combi

Typical fitted: £1,650 – £2,150

Landlords and tight budgets

Main

Eco Compact 24

A · 93%

Output: 24 kW
Hot water: 10.1 l/min
Warranty: 5 yr
Type: Combi

Typical fitted: £1,500 – £2,000

Rentals

Vokera

Easi-Heat Plus 25C

A · 93%

Output: 25 kW
Hot water: 10.2 l/min
Warranty: 5 yr
Type: Combi

Typical fitted: £1,500 – £2,000

Cheapest gas combi here

Ravenheat

HE30 Combi

A · 93%

Output: 30 kW
Hot water: 12.2 l/min
Warranty: 5 yr
Type: Combi

Typical fitted: £1,500 – £2,050

Budget, UK-made

Biasi

Advance Plus 30C

A · 93%

Output: 30 kW
Hot water: 12.3 l/min
Warranty: 5 yr
Type: Combi

Typical fitted: £1,550 – £2,100

The value end

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