Eon New Boiler Installation, and Replacement 2025

Who is Eon?

E.on is recognised as one of the world’s largest energy companies. Based in Germany and founded in 2000, the supplier now operates in over 30 countries and has over 50 million customers worldwide. Under the guidance of CEO Leonhard Birnbaum, the brand not only offers energy products but also heating solutions. You can get a first-class boiler installation with E.on, continue reading to find out more.

Eon Boiler Installation Reviews

E.on has received a varied range of ratings and reviews from their customers for their products and services. Currently, the brand has an “Average” Trustpilot score of 3.4, based on the reviews of 40,493 customers. Their review score is made up of 47% 5-stars, 12% 4-stars, and 30% 1 stars. E.on’s overall Trustpilot score includes reviews for all of their services, including energy, heating and EV charger installations.

Eon Next Trustpilot

correct and accurate as of 11-01-2025

Eon New Boiler Installation

E.on install a range of different types of gas boilers, However, in line with their efforts to encourage environmental sustainability, the installer promotes the installation of more eco-friendly air source heat pumps instead of LPG, electric and oil boilers.

If you’re in need of a new gas boiler, E.on can provide you with a professional installation of a combi, regular or system boiler of your choice. They also conduct thorough back boiler installation. E.on installs boiler systems from leading brands such as Worcester Bosch and Ideal, with a range of systems available to suit the needs of different properties.

Eon boiler replacement

It’s quick and easy to get an Eon boiler replacement. Simply use their free online quote tool and in as little as two minutes you could receive a personalised estimate for the cost of your new boiler, as well as a recommendation for a suitable boiler system for your needs. Alternatively, you could book a video call survey to discuss your needs with a qualified engineer.

When using E.on’s quote tool, you will be asked questions such as which type of fuel you use to heat your property, the type of heating system you currently have, as well as the number of bedrooms, bathtubs and showers you have within your home. Additionally, the tool will ask you to enter the number of radiators and thermostatic radiator valves (TRVs) that are present within your property. All of these questions are asked to help the tool determine the type and size of boiler best suited to your home and needs.

Thinking of relocating your heating system? Just let the tool know and it will factor this into your overall quote price. You will also be asked questions about your flue placement.

How to get a new boiler installed by Eon

Once you’ve answered all of the quote tool’s questions, you will be asked to enter your postcode. At this point, you will be provided with your free quote detailing the most suitable boiler for your needs, a breakdown of its key features, and the price of the E.on boiler installation. The quote will also show you how much it would be to spread the cost of your new E.on boiler replacement and pay monthly.

Next, you’ll need to book a video call with one of E.on’s expert engineers. If you rent your property, you will need authorisation from your landlord in order to carry out the video call. The official new boiler quote will only be provided to the property owner.

Eon Boiler Installation



Select a suitable date and time for your video call survey, decide whether you’d like the call to be conducted over WhatsApp or Facetime, then fill in your contact details to get to the next step in your new boiler journey. A trained E.on engineer will be in touch on your selected date to install your new boiler.

Eon new boiler finance options

You can pay outright for your boiler or you could take advantage of some of the many finance plans on offer from Eon.

Current Eon Boiler Prices

E.on aims to make all of their boiler replacements affordable for their customers. Whether you’re in need of a combi, regular or system boiler, you can trust E.on to provide you with a suitable deal. Looking to book a combi boiler swap? E.on can provide you with this service for around £2,464 - £4,397. If you want to get a conventional boiler swap, this is likely to cost you approximately £2,367 - £3,058 with E.on. For system boiler swaps, you’re likely to be charged around £2,540 - £3,058.

E.on’s expert engineers can also perform system swaps. Replacing your old back boiler with a more modern and efficient combi boiler typically costs £3,159 upwards, whilst a conventional boiler to combi swap is generally priced from £3,114. 

Eon Boiler Replacement: Combi Boiler Prices

With E.on, you can get a new and efficient combi boiler installed into your home at a suitable price for your budget. E.on install combi boilers from top brands Ideal and Worcester Bosch, so you can rest assured knowing that you’ll get excellent value for your investment.

The size of the combi boiler required for your home will impact the overall price. In order to find out which size combi boiler you need, you’ll need to consider the number of radiators you have in your property. Below, we detail the typical boiler sizes needed for different kinds of homes and the estimated prices of installation with E.on.

·      Homes with up to 10 radiators: 24-25kW combi boiler; prices up to £2,795

·      Properties with 10-15 radiators: 28kW – 32kW combi boiler; prices up to £3,682

·      Households with 15-20 radiators: 35kW – 40kW combi boiler; £4,397 .

Published instalation prices (combi swap, same location, horizontal flue), correct and accurate as of 11-01-2025

Eon Boiler Replacement: System Boiler Prices

E.on also install an excellent range of system boilers. These heating systems are manufactured to suit the needs of properties that have a larger demand for heating and hot water. As system boilers have higher heating and hot water capabilities than combi boilers, you can expect to pay slightly more for an E.on system boiler installation. Nevertheless, E.on will aim to provide you with a great deal on your system boiler replacement.

As is the case with combi boilers, the size of the system boiler you require will depend on the number of radiators in your home. Here’s a breakdown of the typical system boiler sizes needed for different properties and the estimated cost of installation with E.on:

·      Households with up to 10 radiators: 15-18kW system boiler; prices up to £2,561

·      Properties with 10-15 radiators: 24kW system boiler; prices up to £3,215

·      Homes with 15-20 radiators: 30kW+ system boiler; prices up to £3,709.

Published instalation prices (system swap, same location, horizontal flue), correct and accurate as of 11-01-2025

Eon Boiler Replacement: Conventional Boiler Prices

You can get a first-class installation of an energy-efficient conventional boiler from E.on. Conventional boilers are the traditional form of heating in the UK, and E.on provides a range of options for you to choose from.

The price of your conventional boiler installation will depend on the size of the system needed for your home. The number of radiators will again influence the boiler size best suited to your property. Here’s a breakdown of the type of conventional boiler required for different households and the estimated cost of installation with E.on:

·      Properties with up to 10 radiators: 15-18kW conventional boiler; prices up to £2,812

·      Households with 10-15 radiators: 24kW conventional boiler; prices up to £3,058

·      Homes with 15-20 radiators: 30kW conventional boiler; prices up to £2,481.

Published instalation prices (conventional swap, same location, horizontal flue), correct and accurate as of 11-01-2025

Eon Boiler Replacement: Back Boiler to Combi Boiler Prices

Do you currently have an old back boiler fitted? If so, it may be time to upgrade to a more modern and efficient heating system. Not only could a combi boiler provide you with a better standard of heating, but it could also help to reduce your heating costs and lower your carbon footprint.

E.on’s expert engineers specialise in conducting high-quality back boiler replacements. They could remove your old back boiler and install a brand-new combi boiler of your choice. Typically, replacing a back boiler with a combi boiler costs more than a standard like-for like swap. This is due to the extra parts and labour required to remove the back boiler from the property, as well as the extra pipework and consumables needed to move the combi boiler to a suitable location.

You can expect to pay around £3,159 for a back boiler to combi swap with E.on. The installer will provide you with an estimated price until an official survey is conducted; then you will be given a fixed-price quote. This is not the case with all installers, other online-only competitors like Boiler Central may be able to provide you with a fixed-priced quote sooner.

Published instalation prices (back to combi swap, same location, horizontal flue), correct and accurate as of 11-01-2025. Guide Price only, survey required to obtain fixed price quote.

Eon Boiler Replacement: Conventional Boiler to Combi Boiler Prices

If you want to trade in your conventional boiler for a more compact combi boiler system, E.on can provide you with a conventional to combi swap at a suitable price. You should be aware that in order to perform this job, the engineer will have to remove the conventional boiler’s water tank. Although this will free up more space in your home, this additional labour will cause the overall cost of the replacement to increase. Additionally, there will be additional pipework and consumables required to move the combi boiler to a suitable location – this will also add to the price.

A conventional to combi swap with E.on will typically cost approximately £3,114 in total. When you get your free quote, E.on will provide you with an estimated price. You will then be required to book a video call survey in order to get a fixed-priced quote for the boiler replacement. Again, this is not the case with all installers, other online-only competitors, like BOXT could provide you with a fixed-priced quote straight away.

Published instalation prices (conventional to combi swap, same location, horizontal flue), correct and accurate as of 11-01-2025. Guide Price only, survey required to obtain fixed price quote.

Eon Boiler Replacement: Final Thoughts

Eon are a good option to review for new boiler replacement particularly if you are considering getting your new boiler on finance, due to the competitive finance packages on offer. The boiler installer runs money off discounts and promotions but is not always the cheapest, but the finance deals on offer are normally very competitive.

Of course we would always recommend gathering a few competitive quotes and then choosing the best for you and your circumstances. Our online boiler quote tool is a great place to start.

FAQs Eon Boiler Replacement

Do Eon have good boiler installation reviews?

Eon have a massive amount of reviews on Trustpilot; over 40 thousand. However they only have a trust score of 3.4 out of 5, rated as average. Only 47% of all their reviews are 5-star and an unsatisfactory 30% of reviews being 1-star indicating that customer satisfaction is not as high as some of their competitors.

How much will a new boiler from Eon cost me?

Eon can install a boiler  from £2,464 for their cheapest combi boiler and rise to over £5k for more complciated jobs with bigger capacity boilers.

Do Eon sell boilers on finance?

Yes they do have various pay monthly finance options available, subject to status, including 0% interest free over 1 or 2 years, plus 9.9% APR over 3, 5, 7 and 10 years. All of which are available with no deposit.