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Over 200 years of experience
And trusted in millions of homes across the UK
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6,500 expert
engineersSo we’re always ready to install your new boiler
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Up to 3 years' interest-free credit
Spread the cost with £0 deposit and no hidden fees
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Up to 12 years' warranty
So if anything goes wrong. we’ll get it sorted
Buy a new conventional boiler with British Gas today
Get a energy-efficient conventional boiler from British Gas and you could cut your gas bill by up to 22%.
Two ways to get your conventional boiler quote
Whatever you pick, we'll give you personalised conventional boiler recommendations tailored to your home.
Our most popular option
Home visit
Best if you'd like to chat to a expert at home - or want to change your boiler type location.
Online quote
Want your new conventional boiler in the same place as your existing one? Get an online estimate right now.
What is a conventional boiler and how does it work?
What is a conventional boiler?
Also known as a ‘regular’ or ‘heat-only’ boiler, conventional boilers are one of the types of boiler that has a water tank. They heat up your radiators directly and connect to a separate cylinder or tank to provide hot water.
How do conventional boilers work?
As with combi boilers, a heat exchanger warms water when fuel is ignited, but with a conventional boiler a pump transports the water to a storage tank. This hot water then flows through to radiators to heat them, or into your taps when you switch them on.
What is the typical cost of a conventional boiler?
New conventional boilers range in price from £1,200 to £5,000 - but these are just average prices. You need to take lots of things into consideration, such as the brand of conventional boiler you want, the model, the warranty and the property size. For example, larger conventional boilers will cost more than smaller ones. The average costs of installing a conventional boiler can vary. You could buy your boiler and then get a local tradesperson to fit it who will charge separately for labour and any additional costs. You might find prices ranging from £600 to £1000s.
The quote for your conventional boiler includes installation
At British Gas, the quote you get for your conventional boiler includes installation too. And no hidden costs. Get a quote from British Gas and we can help you find the perfect conventional boiler to suit your needs. Learn more about the cost of a new conventional boiler
Why choose British Gas to install a new conventional boiler for your home
We install more boilers than anyone else, so when you get your conventional boiler from British Gas, you know you're in safe hands.
We stock the best conventional boiler brands
From Ideal Heating to Worcester and many more, British Gas works with the best boiler brands in the business. And we’ll give you impartial advice to help you find the right conventional boiler for your home.
How to pay for your conventional boiler replacement
Monthly payments
Get up to 3 years' interest-free credit with £0 deposit (0% APR).
Pay in full
Secure with a 10% deposit and pay the balance after your system boiler is installed.
What size conventional boiler should I have installed in my home?
There’s no one-size-fits all conventional boiler for your home. It all depends on various factors, such as the size of your home and how many bathrooms it has. Here’s a rough guide:
Bedrooms |
Bathrooms |
Radiators |
Recommended output |
1-2 |
1 |
0-10 |
9-18kW |
3-4 |
2-3 |
10+ |
18-26kW |
4+ |
3+ |
20+ |
27-40kW |
Is a conventional boiler right for me?
A conventional boiler is the right type of boiler for you if:
- There’s backup hot water in the tank so if your conventional boiler isn’t working properly, there’s still some hot water to use, especially if you have an immersion heater installed in the cylinder
- You can use multiple taps and showers at the same time and still get the same temperature or water pressure from all of them
- Conventional boilers work with older heating systems, making it perfect for older homes
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Advantages |
Disadvantages |
|---|---|
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Multiple use – hot water can run from several taps at once |
Water wait – hot water isn’t always available on demand, you |
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Solar compatible – to lower your bills and do your bit for the |
Less efficient – conventional boilers aren’t as efficient as |
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Back up – even if your boiler breaks down, you can still have |
Pricey installation – can be more expensive to install if you |
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Money saving – these are the cheapest boilers to replace |
Bulky system – you’ll need space for the tanks as well as the |
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Low pressure – conventional boilers don’t rely on high mains |
Limited water – once the hot water tank runs out, you’ll have |
How our customers review us on Trustpilot 
We've got a lovely new boiler and a warm home again. Would definitely recommend!
British Gas out of their way to install a new boiler very quickly. Their staff were wonderful and their engineers were amazing!
The installation of our new British Gas boiler was excellent in every way. Every person who worked with usto install it was highly professional, polite and full of expertise.
Frequently Asked Questions
Are conventional boilers efficient?
All the conventional boilers we supply at British Gas are A-rated for energy efficiency. So yes, they are efficient! When it comes down to efficiency, it all comes down to how you use your energy. And we have a range of tips that can help you with that, whether you’ve got a conventional boiler, system boiler or combi boiler.
Which conventional boiler manufacturer is best?
At British Gas we work with some of the best boiler manufacturers in the industry, including:
Worcester – continuously ranked as one of the UK’s best value boiler brands.
Vaillant – Quiet Mark accredited boilers so you can heat your home without the noise!
Ideal – come with an innovative displays and features, making them easy to use
And many more.