The UK’s No.1 new boiler installer

A new boiler could cut your gas bill by up to 20% and reduce your home's carbon footprint. Upgrade now and we'll give you:

  • Up to 12 years' warranty - if something goes wrong, we'll repair or replace for FREE​
  • Up to 4 years interest-free credit - spread the cost with £0 deposit
Find your new energy-efficient boiler

Boiler installation in 3 simple steps

  • 1We recommend

  • 2We install

  • 3We recycle

We'll help you find your new boiler

Baffled by boilers? Relax, our experts can guide you every step of the way. They’ll recommend the best boilers to keep your home cosy and answer all your questions.

Find your new boiler

Here's what you get with British Gas

Up to 12 years' warranty

We’ll fix or replace your boiler if anything goes wrong

Up to 4 years’ interest-free credit

There are different ways to pay

Energy efficiency as standard

All our new boilers are A-rated which could cut your energy bill

We install more than 200,000 boilers every year. Here's why...

A wide range of top boiler brands

We only install quality boilers – and we’ll help you choose the right one for your home.

Over 6,500 expert engineers

All the leading manufacturers trust our highly trained team to install and service their boilers.

National company, local service

We have expert engineers right across the UK.

Industry-leading expertise

Our engineers are trained to the highest-levels in the business – and we install more boilers than anyone else.

24/7 support

Our customer support team is here for you any time, day or night.

Peace of mind

If something goes wrong with your new boiler, we'll fix it - or replace it for FREE if we can't.

All the best boiler brands

From Bosch to Ariston, Vaillant and Glow-worm, we stock boilers from all the top manufacturers. And we’ll give you impartial advice to help you decide which is the best for you.

+ plus many more brands

What our customers think of us on Trustpilot

The Engineer was extremely efficient, courteous and very helpful. Explained relevant information concisely and clearly. Took less than the amount of time allocated and left no sign of his visit - other than our new boiler and Hive system.


Trustpilot 5 stars

Very happy with the service through out. Everything well explained and happend as informed. From the first time we had an issue with our old boiler to the last day of instalation of the new boiler. Very happy.


Trustpilot 5 stars

Great service both to the engineer and the second guy who did a quote for some work were extremely helpful, knowledgeable and professional. I used British Gas for a new boiler at my previous property and had a great customer service on both homes.


Trustpilot 5 stars

Boiler breakdown?

With Repair and Cover, we’ll get it fixed – and cover your whole heating system for a year.

That means if it breaks down again, we’ll get it sorted. No excess, no call-out fee. And if we can’t fix it, we’ll give you expert help to find the perfect replacement.

Book a one-off repair

Frequently Asked Questions

How much does it cost to install a replacement boiler?

With British Gas, installation is always included in the price of your new boiler. Whether you’re ordering online or through one of our heating advisers, give us all the details and we’ll give you one easy to understand quote.

To get started, click here.

How long does it take to install a replacement boiler?

Installing a new boiler usually takes 1-3 days. If your new boiler is the same type as your old one, it will be simpler and quicker than if you were changing to a different type – for example, from a conventional boiler to a combi boiler. Keeping your new boiler in the same place as the old one will make installation quicker than relocating it, as this creates extra work like changing the pipework.

What happens when a new boiler is fitted?

Your engineer will drain down your central heating and hot water system so that they can disconnect and remove your old boiler. They will then clean out your heating system to get rid of impurities in the system pipework. They’ll then install your new boiler and check that everything is working as it should be. Once that’s done, they’ll talk you through the boiler and system controls and show you how to use it. Our step-by-step guide to new boiler installations explains everything in more detail.

What happens after a new boiler is fitted?

Once your expert engineer has installed your new boiler, they’ll check that everything is working as it should be and then talk you through the boiler and system controls and show you how to use it. Our step-by-step guide to new boiler installations explains everything in more detail.

And we’re here to keep your new boiler in top condition and working as efficiently as possible with our market-leading aftercare package. We’ll be back to give your new boiler its first annual service, and you’re also covered by a warranty of up to 12 years.

That means that if anything goes wrong, we’ll be there to repair it – or to replace it for FREE if we can’t.

You’ll need to have your new boiler serviced annually to keep the warranty valid. To save the hassle of remembering to book this in, all of our HomeCare packages include an annual boiler service at no extra cost. With HomeCare, we’ll give you

  • Unlimited call-outs and repairs
  • Annual boiler service for £7.75 a month
  • Service inclusive of all parts and labour costs

How do I accept my boiler quote?

However you choose to get your new boiler quote, we’ll email you a copy of it and you’ll also be able to access it on our website. You can either accept it online or call us to accept it. When you do, you’ll be able to choose an installation date that’s convenient for you.

If you opt for a home visit to get your quote, then you can accept it from your expert heating adviser there and then. You don’t have to accept it straightaway - they’ll leave you their contact details so you can take some time to think about it. Similarly, if you get your quote online, you can accept it immediately on the website.

Can I speak to someone about buying a new boiler?

Of course! Our expert heating advisers are here to guide you through every step of choosing and buying your new boiler.

You can book a free appointment for a new boiler quote here.

Or if you already have a quote, it will include the contact details of your heating adviser so you can get in touch directly.

Alternatively, give us a call on 0333 009 5784. Our advisers are available 9am-5pm, Monday to Friday.

What boilers do British Gas fit?

We have over 100 different models within our range, all produced by leading manufacturers like Worcester Bosch and Vaillant. Our boilers are selected to work with different sizes and types of properties, and all are chosen for quality, reliability and performance.

Find your new boiler here

How much does a boiler service cost?

According to our friends at Local Heroes, the average cost of a boiler service in the UK is £99. The price you pay for a boiler service might be higher or lower, depending on the type of boiler you have and where in the country you live.

It’s important to have your boiler serviced regularly because not only will doing so keep it in top condition and running as efficiently as possible, but your warranty may also be invalidated if you don’t.

At British Gas, we give you a choice of how to service your boiler:

  • One-off service with no ongoing commitment for £99
  • Annual boiler service for £7.75 a month

Get a quote for your new boiler here

What is the cost of a new combi boiler?

The size of your home and the number of radiators it has will determine the cost of a new combi boiler. A new combi boiler for a small one-bedroom flat with only five radiators will cost much less than a new combi boiler for a large detached house with lots of bedrooms, bathrooms and radiators.

Additional information

  1. Saving up to 23% based on the average gas bill of a semi-detached home when upgrading from a D-rated to an A-rated boiler. Source:

  2. British Gas acts as a credit broker, not the lender and offers products from a panel of lenders. Payment options are subject to change without notice. British Gas is a trading name of British Gas New Heating Limited (No. 06723244), an appointed representative of British Gas Services Limited (No. 03141243) which is authorised and regulated by the Financial Conduct Authority (Financial Services Register No. 490568). Both companies registered in England and Wales. Registered office: Millstream, Maidenhead Road, Windsor, Berkshire SL4 5GD. Availability of credit depends on status and credit checks. Terms and Exclusions apply.