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Combi Boiler Prices 2023

If this year is the year to replace your boiler, we’re sure there’s one question on your mind – how much does a new boiler cost?

Different Combi boiler systems work best for different types of homes and apartments, so it’s important to get the right solution for you and your needs.

In this article, we’ll look at the boilers available to buy, main combi boiler prices, and help you match the right type of boiler to where you live for the right boiler cost.

Types of Boiler:

There are two main types of boiler – conventional boilers and combination (or combi) boilers. They work differently, so it is useful to compare functionality and boiler costs.

Unlike conventional boilers, combi boilers don’t need a hot water tank. Combi boilers heat the water directly from the mains so you’ll benefit from an unlimited supply of hot water. This also means it’s much easier and quicker to heat your home rather than waiting for a hot water tank to fill up.

They’re also much more compact than traditional boilers. Most homes have them fitted in their kitchens neatly stored away behind a storage cabinet door.

New Boiler Prices (including installation costs)
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Compare Combi Boiler Cost

As we mentioned earlier, different homes need different boilers. When choosing a combi boiler, gas prices you pay to your utility company for using it should be a significant consideration for your overall boiler cost. Your running costs will be lower if your if you choose a boiler that is more closely suited to your needs.

What is a professional boiler installer likely to recommend to you?

If you in a flat or a smaller home, most professional installers will recommend that a boiler whose output is between twenty-four and twenty-seven kilowatts. Boilers generating this power can cost between £480 and £1,400.
If you live in a larger property, ask your installer to fit a twenty-eight to thirty-four-kilowatt boiler instead. If you have three to four bedrooms, this is most likely to best choice for you. If you choose one of these boilers, you can expect to pay between £509 and, at the very top end of the range, £2,740.
If you live in a large home, it’s always best to get advice. A professional installer should tell you that a boiler generating thirty-five kilowatts or above is the most suitable and economical solution for you. The most powerful boilers range from around £750 to £1,990.

How Much Does a Combi Boiler Cost in 2023 by Manufacturer?

There are a few leading boiler manufacturers which supply to installers across the UK. In this article, we’ll be looking at:

Worcester Bosch boiler prices range between £770 and £2,030 before installation but including VAT.
Vaillant boiler prices range between £870 and £1,310 before installation but including VAT.
Atag boiler prices range between £2,050 and £2,450 before installation but including VAT.
Viessmann boiler prices range between £840 and £1,220 before installation but including VAT.
Baxi boiler prices range between £720 and £1,150 before installation but including VAT.
Glow-worm boiler prices range between £610 and £1,790 before installation but including VAT.
Ideal boiler prices range between £660 and £1,340 before installation but including VAT.
New Boiler Prices (including installation costs)
New Boiler Prices (including installation costs)

Combi Boiler Installation Prices

Many people search for “British Gas boiler prices” when looking for combi boiler prices with fitting. It’s no surprise as the company is the country’s largest supplier of natural gas. There are other installers like HomeServe and BOXT who are proactively trying to increase their market share. There are also smaller regional companies who are worth considering when you are looking for a new boiler, as it is useful to see how boiler costs vary between companies.

Remember too that if you choose British Gas to install your boiler, you may be paying more than you need to. When it comes to installation, you might want to start with energy companies like British Gas for a quote. You should also look at independent traders who typically charge up to a third less. Boiler prices from British Gas may not be the best deal for you, and boiler costs can vary drastically based on various factors.

First, we’ll look at boiler prices and then consider how much you’ll generally pay to have them installed. Equally, who you should choose to install them.

Compare Combi Boiler Price

So, how much should you pay for your boiler? As we’ve seen, different types of homes require different types of boilers. We’ll look at the leading manufacturers’ offering first then look at the market as a whole.

In our boiler price study, we’ll not just be looking at the kilowatts produced by each boiler. We’ll look at boiler output if this isn’t high enough. Getting your home and water heated to the temperature you require is difficult. If it’s too high, you’ll be paying your gas company more than you need to. Be sure to ask an installer why they believe the output they’re recommending for your home is suitable for you, otherwise you could incur unncessary costs.

We’ll also look at the size of the boilers themselves. They can vary significantly in size, and if you’ve got somewhere in mind you want it to go, you’ll need to make sure it fits into that space. Finally, the flow rate – how much water your boiler can handle at any one time. If you use the water a lot in your home, it’s better to go for a higher flow rate.

New Boiler Prices (including installation costs)

Worcester combi boiler prices

Worcester Bosch installs more boilers in British homes than any other manufacturer. Originally founded in 1962 in Worcester, the company was bought by Bosch in 1999. The company currently rates very highly on consumer opinion sites with thousands of online reviews for you to read.

If you’re looking for boiler prices and the environment is an important consideration, all of Bosch’s boilers have been awarded 90% or above for their energy efficiency.

Here is a selection from the combi boiler range:

Worcester Bosch Greenstar 4000/2000

Model

Dimensions (H x W x D)

Output

Flow Rate

Efficiency Class

Average Price

Worcester Bosch Greenstar 4000 25kW

724 x 400 x 310 mm

24kW

9 litres per minute

A

£1,129

Worcester Bosch Greenstar 4000 30kW

724 x 400 x 310 mm

24kW

10.8 litres per minute

A

£1,275

Worcester Bosch Greenstar 2000 25kW

724 x 400 x 300 mm

20kW

9 litres per minute

A

£851

Worcester Bosch Greenstar 2000 30kW

724 x 400 x 300 mm

20kW

10.8 litres per minute

A

£961

Worcester Bosch Lifestyle Greenstar 8000

Model

Dimensions (H x W x D)

Output

Flow Rate

Efficiency Class

Average Price

Worcester Bosch Greenstar 8000 Life 30kW

780 x 440 x 365 mm

30kW

10.7 litres per minute

A

£1,480

Worcester Bosch Greenstar 8000 Style 30kW

780 x 440 x 365 mm

30kW

10.7 litres per minute

A

£1,730

Worcester Bosch Greenstar 8000 Life 35kW

780 x 440 x 365 mm

35kW

12.5 litres per minute

A

£1,600

Worcester Bosch Greenstar 8000 Style 35kW

780 x 440 x 365 mm

35kW

12.5 litres per minute

A

£1,920

Worcester Bosch Greenstar 8000 Life 40kW

780 x 440 x 365 mm

35kW

14.3 litres per minute

A

£1,854

Worcester Bosch Greenstar 8000 Style 40kW

780 x 440 x 365 mm

35kW

14.3 litres per minute

A

£2,471

Worcester Bosch Greenstar 8000 Life 45kW

780 x 440 x 365 mm

35kW

16.1 litres per minute

A

£2,212

Worcester Bosch Greenstar 8000 Style 45kW

780 x 440 x 365 mm

35kW

16.1 litres per minute

A

£2,470

Worcester Bosch Greenstar 8000 Life 50kW

780 x 440 x 365 mm

35kW

17.9 litres per minute

A

£2,545

Worcester Bosch Greenstar 8000 Style 50kW

780 x 440 x 365 mm

35kW

17.9 litres per minute

A

£2,717

Vaillant combi boiler prices compare

Now an official Superbrand of Britain, you have a choice of eight quality combi boilers on the market from Vaillant. Trading since 1984, the company was the first boiler company to be awarded the “Quiet Mark” for the noise (or lack thereof) that their boilers make while being used.

Here is a selection from the combi boiler range:

Vaillant ecoTEC plus

Model

Dimensions (H x W x D)

Output

Flow Rate

Efficiency Class

Average Price

Vaillant ecoTEC plus 826 - 26kW

720 x 440 x 352 mm

19.8kW

10.6 litres per minute

A

£1,475

Vaillant ecoTEC plus 832 - 32kW

720 x 440 x 352 mm

24.9kW

13.0 litres per minute

A

£1,541

Vaillant ecoTEC plus 836 - 36kW

720 x 440 x 352 mm

29.9kW

14.6 litres per minute

A

£1,705

Vaillant ecoTEC plus 840 - 40kW

720 x 440 x 386 mm

29.8kW

16.3 litres per minute

A

£1,810

Vaillant ecoTEC plus 940 - 40kW

720 x 440 x 580 mm

29.8kW

18.0 litres per minute

A

£2,160

Vaillant ecoTEC exclusive with Green iQ

Model

Dimensions (H x W x D)

Output

Flow Rate

Efficiency Class

Average Price

Vaillant ecoTEC exclusive 835

720 x 440 x 406 mm

26.4kW

14.5 litres per minute

A

£1,793

Vaillant ecoTEC exclusive 843

720 x 440 x 474 mm

36kW

17.8 litres per minute

A

£2,006

Vaillant ecoTEC pro

Model

Dimensions (H x W x D)

Output

Flow Rate

Efficiency Class

Average Price

Vaillant ecoTEC  pro 24

720 x 440 x 338 mm

24.8kW

9.6 litres per minute

A

£1,225

Vaillant ecoTEC  pro 28

720 x 440 x 338 mm

25.9kW

11.1 litres per minute

A

£1,346

Vaillant ecoTEC pro 30

720 x 440 x 338 mm

25.7kW

12.3 litres per minute

A

£1,415

Vaillant ecoFIT pure

Model

Dimensions (H x W x D)

Output

Flow Rate

Efficiency Class

Average Price

Vaillant ecoFIT pure 825

700 x 390 x 295 mm

19.1kW

10.4 litres per minute

A

£1,099

Vaillant ecoFIT pure 830

700 x 390 x 295 mm

26.5kW

12.2 litres per minute

A

£1,284

ecoFIT pure 835

700 x 390 x 295 mm

26.7kW

14.1 litres per minute

A

£1,428

ATAG boiler prices compare

A recognised brand for over seventy years, ATAG’s customer range from homeowners right up to the companies and organisations occupying the largest commercial premises. A Dutch company with a strong UK presence, the company has won many awards around the world, and they are repeated winners of the “Best Boiler” awards in the Netherlands.

Here is their current full UK range:

ATAG Economiser Combination Boiler

Model

Dimensions (H x W x D)

Output

Flow Rate

Efficiency Class

Average Price

ATAG i27C Plus

700 x 440 x 355 mm

23.2kW

12.6 litres per minute

A

£1,950

ATAG i35C Plus

700 x 440 x 355 mm

31.2kW

16.1 litres per minute

A

£2,096

ATAG i39C Plus

700 x 440 x 355 mm

31.2kW

17 litres per minute

A

£2,160

ATAG iC Combination Boiler

Model

Dimensions (H x W x D)

Output

Flow Rate

Efficiency Class

Average Price

ATAG i24C

700 x 440 x 355 mm

23.2kW

10.1 litres per minute

A

£1,300 

ATAG i28C

700 x 440 x 355 mm

23.2kW

11.5 litres per minute

A

£1,360

ATAG i36C

700 x 440 x 355 mm

31.2kW

14.9 litres per minute

A

£1,420

ATAG i40C

700 x 440 x 355 mm

31.2kW

16.2 litres per minute

A

£1,480

ATAG iS Boiler System

Model

Dimensions (H x W x D)

Output

Efficiency Class

Average Price

ATAG i15S

700 x 440 x 355 mm

14.7kW

A

£1,270

ATAG i18S

700 x 440 x 355 mm

17.5kW

A

£1,330

ATAG i24S

700 x 440 x 355 mm

23.2kW

A

£1,390

ATAG i32S

700 x 440 x 355 mm

31.2kW

A

£1,450

ATAG i40S

700 x 440 x 355 mm

38.8kW

A

£1,510

ATAG iR Regular Boiler

Model

Dimensions (H x W x D)

Output

Efficiency Class

Average Price

ATAG i15R

700 x 440 x 355 mm

14.7kW

A

£1,150

ATAG i18R

700 x 440 x 355 mm

17.5kW

A

£1,210

ATAG i24R

700 x 440 x 355 mm

23.2kW

A

£1,270

ATAG i32R

700 x 440 x 355 mm

31.2kW

A

£1,330

ATAG i40R

700 x 440 x 355 mm

38.8kW

A

£1,390

Viessmann combi boiler prices compare

Like ATAG, Viessman is an overseas company which has been settled in Britain (including its dedicated customer service HQ in Telford) since 1989. Viessman currently offers sixteen different combi boilers to the market with amazing energy efficiency ratings – ninety-eight percent of the power they consume in operation is turned into heat.

Here is the UK combi boiler range:

Model

Dimensions (H x W x D)

Output

Flow Rate

Efficiency Class

Average Price

Viessmann Vitodens 050-W

700 x 400 x 300 mm

35kW

14.3 litres per minute

A

£1,150

Viessmann Vitodens 100-W

700 x 400 x 360 mm

32kW

34.9 litres per minute

A

£1,163

Viessmann Vitodens 200-W

700 x 450 x 360 mm

32kW

34.2 litres per minute

A

£1,883

Viessmann Vitodens 222-F

595 x 600 x 1400 mm

32kW

33.5 litres per minute

A

£3,225

Baxi combi boiler prices compare

Established in 1866, Baxi provide domestic and commercial boilers across the UK complete with an industry-leading warranty and back-up support. Headquartered in Holland with a global presence, the company continues to win awards for the quality of the products and the way the company is run – including the Energy Efficiency Award and the Customer Service Award at the Gas Industry Awards in 2017.

Here is a selection from the combi boiler range:

Baxi Combi 2

Model

Dimensions (H x W x D)

Output

Flow Rate

Efficiency Class

Average Price

Baxi 224 Combi 2

700 x 395 x 279 mm

22.9kW

9.8 litres per minute

A

£625

Baxi 228 Combi 2

700 x 395 x 279 mm

22.9kW

11.4 litres per minute

A

£672

Baxi 424 Combi 2

700 x 395 x 285 mm

22.9kW

9.8 litres per minute

A

£700

Baxi 430 Combi 2

700 x 395 x 285 mm

22.9kW

11.9 litres per minute

A

£748

Baxi 624 Combi 2

700 x 395 x 285 mm

20.6kW

10.2 litres per minute

A

£980

Baxi 630 Combi 2

700 x 395 x 285 mm

25.7kW

12.2 litres per minute

A

£1,122

Baxi 636 Combi 2

700 x 395 x 285 mm

25.7kW

15 litres per minute

A

£1,270

Baxi 824 Combi 2

700 x 395 x 285 mm

20.6kW

10.2 litres per minute

A

£1,278

Baxi 830 Combi 2

700 x 395 x 285 mm

25.7kW

12.2 litres per minute

A

£1,345

Baxi 836 Combi 2

700 x 395 x 285 mm

25.7kW

15 litres per minute

A

£1,410

Baxi Platinum Combi

Model

Dimensions (H x W x D)

Output

Flow Rate

Efficiency Class

Average Price

Baxi Platinum Combi ErP 24

780 x 450 x 345 mm

25.9kW

9.8 litres per minute

A

£1,073

Baxi Platinum Combi ErP 28

780 x 450 x 345 mm

25.9kW

11.5 litres per minute

A

£1,157

Baxi Platinum Combi ErP 33

780 x 450 x 345 mm

30.3kW

13.5 litres per minute

A

£1,312

Baxi Platinum Combi ErP 40

780 x 450 x 345 mm

34.4kW

16.4 litres per minute

A

£1,450

Baxi Platinum+ 40 Combi

780 x 450 x 345 mm

36.4kW

16.4 litres per minute

A

£1,895

Baxi Duo-tec Combi

Model

Dimensions (H x W x D)

Output

Flow Rate

Efficiency Class

Average Price

Baxi Duo-tec 24 Combi

780 x 450 x 345 mm

21.0kW

9.8 litres per minute

A

£921

Baxi Duo-tec 28 Combi

780 x 450 x 345 mm

25.9kW

11.5 litres per minute

A

£1,012

Baxi Duo-tec 33 Combi

780 x 450 x 345 mm

30.3kW

13.5 litres per minute

A

£1,096

Baxi Duo-tec 40 Combi

780 x 450 x 345 mm

34.4kW

16.4 litres per minute

A

£1,190

Glow-worm combi boiler prices compare

Purchased by Valliant in 2001, the company decided to keep and grow the Glow-worm brand because of the high reputation it has among customers and installers in the UK. Originally opened in 1934 in Derbyshire, the company’s mission has to offer its customers reliable, efficient products which place it as one of the leading heating manufacturers in the UK.

Here is a selection from the combi boiler range:

Glow-worm Compact Combi Boilers

Model

Dimensions (H x W x D)

Output

Flow Rate

Efficiency Class

Average Price

Glow-worm Compact 24kW

626 x 400 x 270 mm

24kW

9.9 litres per minute

A

£566

Glow-worm Compact 28kW

626 x 400 x 270 mm

28kW

11.5 litres per minute

A

£640

Glow-worm Energy Combi Boilers

Model

Dimensions (H x W x D)

Output

Flow Rate

Efficiency Class

Average Price

Glow-worm Energy 25kW

700 x 390 x 280 mm

25kW

12.1 litres per minute

A

£904

Glow-worm Energy 30kW

700 x 390 x 280 mm

30kW

14.2 litres per minute

A

£1,030

Glow-worm Energy 35kW

700 x 390 x 280 mm

35kW

16.5 litres per minute

A

£1,202

Glow-worm Ultimate₃ Combi Boilers

Model

Dimensions (H x W x D)

Output

Flow Rate

Efficiency Class

Average Price

Glow-worm Ultimate₃ 30kW

740 x 418 x 300 mm

30kW

12.4 litres per minute

A

£840

Glow-worm Ultimate₃ 35kW

740 x 418 x 300 mm

35kW

14.4 litres per minute

A

£926

Glow-worm Easicom₃ Combi Boilers

Model

Dimensions (H x W x D)

Output

Flow Rate

Efficiency Class

Average Price

Glow-worm Easicom₃ 24kW

740 x 418 x 300 mm

24kW

10 litres per minute

A

£630

Glow-worm Easicom₃ 28kW

740 x 418 x 300 mm

28kW

11.7 litres per minute

A

£680

Ideal combi boiler prices compare

Founded in 1906, Ideal is a leading manufacturer of boilers for use both in the home and the workplace. It sets itself the challenge of continually testing technological boundaries to deliver the very best products to its customers and installers.

Here is a selection from the combi boiler range:

Ideal Logic Max Combi

Model

Dimensions (H x W x D)

Output

Flow Rate

Efficiency Class

Average Price

Ideal Logic Max Combi 24

700 x 395 x 278 mm

24.2kW

9.9 litres per minute

A

£984

Ideal Logic Max Combi 30

700 x 395 x 278 mm

30.3kW

12.4 litres per minute

A

£1,230

Ideal Logic Max Combi 35

700 x 395 x 278 mm

35.3kW

14.5 litres per minute

A

£1,397

Ideal Vogue Max Combi

Model

Dimensions (H x W x D)

Output

Flow Rate

Efficiency Class

Average Price

Ideal Vogue Max C26

740 x 450 x 330 mm

19.3kW

10.6 litres per minute

A

£1,363

Ideal Vogue Max C32

740 x 450 x 330 mm

27.9kW

13.1 litres per minute

A

£1,467

Ideal Vogue Max C40

740 x 450 x 330 mm

34.3kW

16.4 litres per minute

A

£1,583

Ideal Vogue Gen2 Combi

Model

Dimensions (H x W x D)

Output

Flow Rate

Efficiency Class

Average Price

Ideal Vogue Gen2 C26

740 x 450 x 330 mm

19.3kW

10.6 litres per minute

A

£1,225

Ideal Vogue Gen2 C32

740 x 450 x 330 mm

27.9kW

13.1 litres per minute

A

£1,467

Ideal Vogue Gen2 C40

740 x 450 x 330 mm

34.3kW

16.4 litres per minute

A

£1,618

Ideal Logic+ Combi

Model

Dimensions (H x W x D)

Output

Flow Rate

Efficiency Class

Average Price

Ideal Logic+ C24

700 x 395 x 278 mm

25.6kW

9.9 litres per minute

A

£915

Ideal Logic+ C30

700 x 395 x 278 mm

25.6kW

12.4 litres per minute

A

£1,048

Ideal Logic+ C35

700 x 395 x 278 mm

25.6kW

14.5 litres per minute

A

£1,236

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