BOXT Boiler Prices & Installation Cost 2025

BOXT is one of the most popular boiler installers in the UK. Allowing customers to select and purchase a brand-new boiler online, this Leeds-based installer seeks to make boiler replacements as convenient as possible.

Founded by Mel Butler, Andy Kerr and Keith Jones, BOXT was launched in 2017 to simplify the boiler buying process and to help make the heating industry fairer on customers. This boiler installation company aims to provide homeowners with fixed, competitive prices on all boiler installations. They operate across the UK on a nationwide scale.

BOXT have gone through various rounds of funding and ownership structures and on 5th December 2023 Homeserve Assistance Limited aquired a majority stake with over 75% of the shares.

How BOXT Boilers works

BOXT aim to make it simple and convenient for you to get a new boiler installed. All you have to do is use their free online quote tool to get a fixed-priced quote for your new boiler installation. You’ll need to answer questions regarding the type of system your home requires, i.e., gas, LPG or oil, and provide a few details about your current heating system so that they can measure your needs. If you’re in need of an oil-fuelled heating system, you will be instructed to contact their specialist team on 0800 193 7777 or via live chat so that they can provide you with more tailored assistance.

BOXT Boilers: how to get a quote

The quote tool will also request information about the type of property you have, for example, the number of bedrooms, bathtubs, showers and radiators you have. Once you have answered all of the necessary questions, simply enter in your postcode and the tool will reveal the best offers for your home and needs.

You will have a variety of options for your new boiler system to choose from, all of which would be excellent options for your property and heating requirements. The quote will detail the different boilers’ main features and functions, the included warranty period, and information on your payment options. You can choose to pay for your new BOXT boiler installation in full or select a suitable finance option.

The quote will also inform you of what’s included in your total installation package, such as the removal and safe disposal of your old boiler, a MagnaCleanse system flush, and a brand-new thermostat to help you control your heating.

BOXT Boiler Prices

BOXT boiler prices range from £1,499 to £6,000 including full installation.

BOXT install a range of different boiler types and their qualified engineers are skilled in conducting all installations, whether it’s a straight swap or a more complicated system replacement. No matter the job, BOXT aim to provide you with an affordable deal that won’t leave you out of pocket.

Do you currently have a combi boiler installed? If so, you’ll typically pay around £1,499 to £4,450 for a straight combi replacement. If you’re in need of a conventional/heat-only boiler swap, you could pay approximately £1,825 to £3,738. For system boiler swaps, you’re likely to pay around £1,950 to £2,927 with BOXT.

The installer can also meet your needs if you’d like a system swap within your home. For example, they can replace your existing conventional boiler with a combi boiler for around £2,725 to £3,695. BOXT also specialise in conducting back boiler replacements, swapping old back boilers with more modern and efficient combi boilers. This job typically costs between £2,725 to £3,695. 

BOXT Combi Boiler Prices

BOXT install combi boilers from £1,499 up to £5,000.

BOXT install a range of different combi boilers to households across the country. No matter the size of combi system required for your home, you can trust that BOXT can provide you with an effective solution.

Did you know that the combi boiler size required for your home is dependent on the number of radiators featured at your property? Here’s a breakdown of the type of combi boiler sizes typically needed for different homes:

·      Homes with up to 10 radiators: 24-25 kW combi boiler; prices up to £1,925

·      Properties with up 10-15 radiators –28-32 kW combi boiler; prices up to £2,480

·      Homes with up to 15-20 radiators – 35-40 kW+ combi boiler; £4,450

BOXT supply combi boilers from premium brands such as Worcester Bosch, Ideal and Vaillant in a variety of sizes, from 24kW to 50kW.

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

BOXT System Boiler Prices

A system boiler from BOXT will cost between £1,950 up to £5,000.

BOXT also install high quality system boilers into homes of all sizes. Like combi boilers, the installer fits system boilers that will suit the needs of specific homes. Here’s a breakdown of the types of homes different system boilers typically suit:

·      Properties with up to 10 radiators – 15 - 18kW system boiler; prices up to £2,399

·      Homes with up 10-15 radiators – 24kW system boiler; prices up to £2, 580

·      Properties with 15-20 radiators – 30kW + system boiler; prices up to £2,927

BOXT installs system boilers from top brands such as Worcester Bosch, Ideal and Vaillant. They have system boilers with power outputs of 9kW to 35kW to suit the heating and hot water requirements of every property.

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

BOXT Conventional Boiler Prices

A conventional boiler from BOXT will cost between £1,825 and £5,000.

BOXT install a diverse selection of conventional boilers to suit the needs of homes that have a tank and cylinder. The type of conventional boiler best suited to your home will depend on factors such as the number of radiators. For example:

·      Homes with up to 10 radiators – 15-18kW conventional boiler; prices up to £2,075

·      Properties with 10-15 radiators – 24 kW conventional boiler; prices up to £2,440

·      Homes with 15-20 radiators – 30kW conventional boiler; prices up to £3,738

BOXT installers fit conventional boiler systems from brands such as Worcester Bosch, Vaillant and Ideal in homes of all sizes. Their conventional boiler collection ranges in size from 12kW to 40kW.

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

BOXT Back Boiler to Combi Boiler Prices

A back boiler conversion to a combi boiler from BOXT will cost from £2,995 to £6,000.

Are you looking to replace your old back boiler with a brand-new, energy-efficient combi boiler? If so, BOXT can provide you with an effective solution for your home and needs.

BOXT’s Gas Safe registered engineers are skilled in conducting back boiler replacements and they can install a high-quality combi boiler into your property.

The cost of replacing your back boiler with a combi boiler will vary depending on the size and brand of the boiler selected. Typically, BOXT charge between £2,995 to £3,695 for back boiler to combi swaps.

The cost of back boiler to combi swaps are higher than standard boiler swaps due to the additional labour required to remove the back boiler and the extra pipework and consumables needed to the combi boiler to a suitable location within the home. 

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

BOXT Conventional Boiler to Combi Boiler Prices

A conventional swap for a combi boiler by BOXT will cost from £2,995 to £6,000.

Another fairly common boiler installation type is conventional boiler to combi boiler swaps. Many homeowners wish to free up space within the home by getting rid of the tank and cylinder needed for conventional boilers – a combi boiler installation allows you to do this.

BOXT typically charge between £2,995 and £3,695 for a conventional to combi boiler swap, depending on the brand and size of the system selected. Again, this job tends to be more expensive than standard like-for-like system swaps due to the removal of the hot water tank and the additional pipework and consumables required in order to move the combi boiler to a suitable area within the home.

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

What price guarantee does BOXT offer?

Once you’ve selected your new boiler deal, you will be offered a selection of extras such as timers, TRVs (thermostatic radiator valves) and scale reducers. After this step, you will need to confirm your chosen quote and select a suitable installation date. BOXT is committed to offering you the best price for your new boiler installation, so they state that they will beat any like-for-like quote or give you £50.

BOXT Installation Process

Once you have selected a suitable date for your installation, the installer will let you know when your Gas Safe registered engineer will arrive and how long the installation is likely to take. BOXT installers typically arrive between 7:30 – 9:30am. A unique feature of the BOXT quote process is that they introduce you to the engineer who will be conducting your boiler installation, providing you with their name and a link to some of their customer reviews.

Finally, enter in your contact details so that the installer can send you confirmation of your installation, then select a suitable payment method.

Which boilers do BOXT install?

BOXT install a vast range of boiler systems, including gas, LPG and oil heating solutions. For gas and LPG enquires, you can use the brand’s online quote service. However, you’ll need to contact the installer via phone or live chat to enquire about oil boiler installations.

BOXT specialise in conducting a variety of boiler installations, from combi boiler, heat-only and system boiler fittings to back boiler replacements. They also install heating systems from leading brands such as Worcester Bosch, Ideal, Viessmann and Alpha. You’ll also be able to find boilers in a range of different sizes from this installer, so rest assured that they could provide you with an effective solution regardless of the size of your home.

BOXT Customer Reviews

BOXT have received a number of reviews and ratings from their customers for their heating products and services. To get a better insight into BOXT, it can help to look at some of the reviews they have received.

On Trustpilot, BOXT has an “Excellent” rating of 4.9 out of 5. Their score is based on the reviews of around 15, 188 customers. 97% of their reviews are 5-stars, 2% are 4-stars and they only have <1% of 1-star reviews. Their commendable ratings are a testament to this boiler installer’s commitment to delivering excellent service.



BOXT Trustpilot

In terms of Trustpilot Ratings and Reviews BOXT and therefore customer satisfaction BOXT are class leaders, bo other boielr installer has the depth and volume of 5* reviews, such a high percentage of all their reviews being 5-star and such a low percentage of their reviews being 1-star. As the graphs below show only iHeat and Heatable come close to the 97% percent of all reviews that are 5-star that BOXT command (93% respectively). Whilst only iHeat (1%), Heatable (1%), Warmzilla (2%) and Boiler Central (3%) are in the same zone as BOXT with <1% 1-star reviews, indicating a consistantly high level of service delivered from this cohort of installers.

correct and accurate as of 11-1-2025

BOXT payment options and finance deals

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

FAQs BOXT

Who owns BOXT?

BOXTs majority owner is HomeServe Assistance Limited who purcahsed a more than 75% stake in BOXT in December 2023.

What is BOXT?

BOXT is an online platform for homeowners to purchase new boilers, smart home devices, air conditioning and electric vehicle chargers. They were launched in 2017.

How much is a BOXT boiler?

BOXT boilers start at £1,825 and increase based on job type and grade of boiler required.