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Boiler Replacement

We recognise that for most people getting a new boiler installed is an unfamiliar and scary process - so, we're here to help with boiler replacement.

In this guide, we’ll offer boiler replacement advice and teach you the basics to make sure you know different types of boilers & brands to choose from. We’ll even breakdown our easy to understand boiler installation process.

When should you replace your boiler?

The heartbeat of a home is your boiler and a cosy household is something that we can all take for granted. So, if your boiler has been on the blink or you've been thinking about upgrading to a more energy-efficient system, we've listed the many reasons of when you should definitely replace your inefficient or old system.

If you’re having to call out an engineer more than once a month to 3 times a year. It’s worth considering whether the sum of the repairs is greater than the cost of a new boiler - most of the time it will be.


You can help keep your boiler healthy by getting it serviced annually, this will help keep it running smoothly - and if any repairs are necessary, they should only be minimum.


A boiler should only be replaced if it’s always on the blink and costing you too much.

You could be paying a lot more on gas bills with an older boiler as they’re far less environmentally friendly than a new A+ energy efficient boiler. Manufacturers are always looking at ways to improve boiler technology to become more energy efficienct – which helps the environment and you save money on energy bills. Win-win. 

If your current boiler has a low efficiency rating, it’s definitely time to think about replacing your boiler.

If your current boiler no longer meets the needs of your home. As an example, you may have just extended your property from a 2-bedroom home to a 4-bed, and you didn’t realise your little combi boiler couldn’t keep up with the amount of extra work.


So, rather than try to manage with a boiler that clearly isn’t fit for purpose, it’s much better to install a new boiler that’s perfect for you and your new home.

When selling or renting your home, an old or inefficient boiler is likely to be picked up on a survey by any prospective buyers. It’s much better to replace your boiler before you sell the house and cover installation costs within the house price.


The same applies to renting, as you are more likely to attract tenants with a reliable and up to date boiler and central heating system. Just remember no one wants an angry tenant complaining about cold showers and a broken boiler.

If you can smell an eggy odour when you use your boiler, it’s likely a gas leak. You must immediately turn off your boiler and call the emergency gas line on 0800 111 999. You should do this if you ever smell any unusual odours coming from your boiler.


If your boiler is leaking at all, there is likely an issue with an internal component and if the problem isn’t fixed, it will lead to further damage – which will cost a lot more money than just a simple boiler install.   


In both situations, we’d recommend turning your boiler off and have it professionally checked by a Gas Safe engineer. Hopefully, it’ll be possible for them to repair the boiler to a working condition without having to install a brand-new boiler.

Most of you probably won’t agree with us, but if you’ve been considering a boiler replacement for a while then you should definitely get it installed during the spring-summer time. Hear us out.


Winter is one of busiest times of the year for boiler installs and repairs. So, if you’re in need of a new boiler during a freezing storm or a bad wintery week, you could be without hot water for days - No one needs that in their life.


Think of it as a preparation purchase – you may not need it right now but it’s better to be prepared and warm for winter instead of unprepared and freezing. Plus, in the summer you’ll have total flexibility of when you want the boiler installed - and if there are any teething issues you can let the installer know and be totally winter-ready.

Trust us, we’re the boiler experts.  

Different boiler types combi regular heat only system boiler

What type of boiler do I need?

When it comes to choosing the 'best type' of boiler for your home it all depends on various factors such as house size, number of bathrooms and water pressure - there isn't a 'perfect' boiler for 100% of people so we'll explain the most popular boiler types in the UK and a little about them.

Different boiler brands

What boiler brand is the best?

When it comes to choosing the 'best brand' of boiler - it all depends on which manufacturer sounds perfect for you and your home. We've listed popular boiler brands we work with daily - all of which offer an up to 10-year manufacturer-backed warranty. 

How do you replace a boiler?

No obligations quick online quote

Online quote

Get an instant online quote. In just a few clicks you can choose your boiler, payment method and book your installation.

Gas safe registered engineer video and home survey


Our experts will check your chosen boiler is a perfect fit for your home. So you get the best efficiency and output from your new boiler.

Gas safe registered engineer boiler installation


Our Gas Safe Registered engineers will install your boiler, at a time that suits you. They'll do a tidy job and show you how to use your boiler.

Customer service happy healthy boiler


We give you the full VIP treatment and post installation, repair or service, we'll check-in with you to ensure you're happy.

Different boiler types combi regular heat only system boiler

How much does it cost to replace a boiler?

There are various factors that influence the cost of a brand new boiler. The size of your home, the type of system you need or which brand you’d prefer. All have costs associated with them and our new boiler cost guide will help alleviate the confusion.

At Boiler Plan, we offer our customers a range of finance options to suit their timescales & budgets. Our packages come with an up to 10-year warranty, which covers you for all repairs, labour, call-outs and parts; plus, all our local experts are trained to work across multiple heating brands.

Frequently asked questions

Choosing the right boiler for you can be confusing. So, if you're not sure or have burning questions that need answering, take a look at our FAQ's below.

This depends on what work you're having done when installing your new boiler. For the quickest installation possible, when you purchase a boiler swap online we aim to have it installed within 48 hoursˆ.

Here's our full guide on how long it takes to fit a new boiler.

No, you don't have to replace any radiator when you purchase a new boiler.

If your radiators are older or you just want to upgrade them then we can absolutely replace as many radiators as you like, just let our surveyor know during your home or video survey, but this is completely up to you.

We do offer ECO grants for eligible households. This will make the boiler installation free or heavily discounted, as long as you qualify for the schemes.

For everyone else, we do offer payment plans that will help make the price of a new boiler more affordable.

We’ll always be on hand if you need us

Once your brand new boiler is installed and you’re enjoying the benefits of a lovely warm home just know that's not the end of our services. Repairs and Servicing is just one way we can help keep your home warm.

Whenever you need us just get in touch any way you prefer and our friendly customer service team will be on hand to help.


Hopefully, this guide will have offered you some insight into the wonderful world of boilers. If you need any more help with boilers, brands or installs then don't hesitate to get in touch with us on 0800 61 22 302 - or email us on

We're here to help.