New boilers: Boiler replacement cost & deals 

A boiler is the heart of a home’s central heating system, supplying heat to the radiators and hot water to the taps.

It's a complicated and expensive piece of machinery, which works by burning gas to heat water, before feeding it into the central heating system.


On this page you can find information about: 


Finding the right boiler for your home

Get an online boiler quote, check out all the areas we're covering with local boiler service or read more about the different boiler types on this page.

In today's market the biggest seller and most popular type of boiler is the combi boiler. A combi boiler heats water directly from the mains, allowing a constant supply of hot water and alleviating the need for a separate water tank.

They are one of the most efficient types of boiler as they will only heat water on demand.

However, just as there are many different types of home, so there are many different types of boiler; including conventional, system and back boilers.

Boilers come in all shapes and sizes, but which one is right for you?


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The different types of boiler

Combi boilers:

  • Compact size; good choice for smaller properties
  • No loft space needed in your home
  • Less pipework required which typically makes the installation cheaper
  • Provides a constant flow of hot water from the mains
  • Read more about Combi boilers


System boilers:

  • Suitable for homes with more than one bathroom
  • Doesn't need a loft tank, which saves space
  • No feed or expansion cistern makes them more efficient
  • Offer a constant supply of hot water to any number of taps
  • Read more about System boilers


Conventional boilers:

  • Perfect for homes where a lot of hot water is used at the same time
  • Suitable for large households with two or more bathrooms
  • Requires a cold water storage tank in the loft as well as a hot water tank
  • Read more about Conventional boilers


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Click below to read about other types of boiler available:


The most common boiler sizes:

  • 24-25kw – suitable for flats and houses with 2-3 bedrooms, with up to 10 radiators
  • 28-30kw – suitable for 3-4 bedroom properties with up to 15 radiators
  • 33-35kw – suitable for large houses with up to 20 radiators
  • 40kw+ – suitable for larger properties with more than 20 radiators


Popular boiler brands to look out for:

  • Vaillant
  • Ideal
  • Glow-Worm
  • Intergas
  • Worcester Bosch
  • Viessmann
  • Baxi
  • Vokera


When should I consider buying a new boiler?

Unless you're upgrading your boiler before a problem occurs, it's likely you'll be replacing an existing one because it's not functioning correctly.

Replacement or not?

Before you decide to swap your old boiler for a new one, it's worth getting a second opinion from a Gas Safe registered engineer, who will be able to check it for you and see if it can be repaired.

It may be the case that a simple remedy is at hand, and it may be possible that an inexpensive solution is available.

If your boiler can't be repaired an engineer will be able to recommend the best type of boiler to replace it with, taking into consideration the size of your home and budget.

You may also wish to replace your boiler if it's rated 'G' for energy efficiency. 'G' is the lowest rating meaning the boiler is likely to be wasting fuel and costing you more money to run.

Installing a new boiler can also add value to your property if you're looking to rent it out or sell it, and it will also have an effect on the EPC rating of your property.


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The fees for servicing your boiler

It's important to regularly service your boiler to make sure it's in good working order and to safeguard against potential problems in the future.

Many boiler manufacturers also require an annual boiler service as part of the terms of their warranty.

When it comes to the cost of a boiler service, expect to typically pay around £60-110, depending on the make and age of your boiler.


The expenses for repairing your boiler

In some cases, it may be possible – and make economical sense - to fix your boiler should it develop any faults.

Should your boiler be in need of repair, parts aside, you can expect to pay from £50 upwards. For emergency call outs, prices typically start at £80.


The cost of a new boiler

Prices for a new boiler vary greatly, and can range from £600 to £3,000. This is dependant on many differing factors including what type of boiler it is, the size of the boiler and any additional costs that may result from the installation itself.

We've designed a helpful quiz so you can find out the real savings you can make with a new energy efficient boiler. We've put the savings into context for you, calculating how much money you'll have left each year to spend on your favourite things.


The boiler you choose will also very much depend on your individual requirements and circumstances. 

HomeServe can provide you with an indicative price for a new boiler by using our online quote form.

Get a boiler quote by entering your details on our online form and we'll email you an indicative cost straight to your inbox.

You may also want to find out if you're eligible for a boiler scrappage scheme, which offers a £400 rebate on old boilers with an energy efficiency rating of ‘G’.


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Pay monthly for your new boiler

Many heating companies offer finance packages to help spread the cost of buying a new boiler.

Flexible payment options can make buying a new boiler more manageable, and you can choose the length of your payment term to suit your budget and lifestyle.

To see if your local HomeServe Heating approved engineers offers finance packages, simply enter your postcode using our form and one of our advisors will be in touch.


Save money with improved heating efficiency

It's no secret that a new boiler can be a costly investment, but along with improved heating there are also many long-term financial benefits.

Your new boiler could potentially save you money on your heating bill if it's more energy efficient than the one it replaces.

Under EU guidelines, all newly manufactured boilers must hold an energy efficiency rating of ‘A’.

An ''A"-rated boiler holds an energy rating of at least 88% compared to similar boilers.


Tips to save money on your bill

Along with replacing your boiler, there are many other, less expensive, ways in which you can save money on your monthly bill:

  • Draught-proof your windows
  • Insulate your loft / walls
  • Insulate your windows
  • Purchase a smart thermostat
  • Install thermostat radiator valves (TRVs)
  • Move to a cheaper gas and electricity provider


Boiler installation time

In many cases, HomeServe can recommend and install a new boiler in as little as 48 hours as well as offering emergency boiler repairs, depending on the type of boiler you choose**.

It may occasionally take up to three days to install a new boiler if it requires more work.

For example: converting from a system boiler to a combi boiler, is a more complicated job than a straightforward upgrade.


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Get a boiler quote

To receive a free quote on a new boiler, simply answer a few simple questions using our online form and get a quote on a boiler deal.


Find a gas engineer in your local area

We offer a local boiler service across the country and you can get a new installation in areas including - but not limited to:


**Online discount is available to domestic gas and LPG customers who receive an online quote for all boiler brands excluding Ideal Logic HO18 & HO24 & like-for-like system swaps on the Ideal Logic HE24 and HE30, and Ideal Logic HO12 & HO15 boilers. Discount will be applied as long as the quoted price is still applicable at the point of sale. Online discounted price is only available for the duration of the 14-day quote validity which starts from the day the quote was given. Offer is not available to HomeServe Heating Services UK Ltd employees. | All boiler manufacturer types on like-for-like system swaps excluding the following boilers: Ideal Logic HE24 & HE30, Ideal Logic HO12, HO15, HO18 & HO24 are eligible for a £50 discount and then 5% discount off the final quoted price. Conventional to combi boiler swaps also qualify for an additional £100 discount after 5% initial discount is applied. This offer cannot be used in conjunction with any other offers. HomeServe Heating Services UK Ltd have the right to withdraw or change the offer at any time. Online discount is automatically applied when the customer gets a quote using the online quote system at and as long as the customer meets all the above criteria.

**Subject to survey availability and installation appointment.  

Get your free online boiler quote in just 30 seconds

Answer a few brief questions about the size of your home and energy use and find out how much a brand new boiler could cost in less than 30 seconds. 

Get an online quote