Fixed price new boilers, with next working day installation from BOXT.
Why choose BOXT for your new boiler?
When you buy your new boiler from BOXT, you benefit from:
Next working day installation.
When you order before 3pm.1
Fixed, fair prices starting from £1,795.
Which includes installation, parts, labour and VAT.2
Boiler installation with trust.
With over 40,000 five-star Trustpilot reviews. BOXT is the UK's most trusted boiler installation company.
BOXT's Price Match Promise.
Which means you won't find a better like-for-like quote anywhere else.3
Pre-install suitability survey.
To double check everything you've ordered is a perfect fit for your home.
Post-install quality check.
To make sure all the work done meets our high standards, as well as manufacturer and industry regulations.
One year workmanship warranty.
Covering all work done by our BOXT accredited local engineer.
Up to 10-year manufacturer-backed warranty.
Which BOXT registers with the manufacturer for you.
The handy BOXT app.
Means you can track your purchase and access all documents post-install.
How does BOXT work?
Discover.
Answer some questions about your home and get a fixed price new boiler quote in minutes.
Choose.
Compare brands, models and sizes to choose the right new boiler for your home, then choose how to pay.
Install.
Order your new boiler online by 3pm for next working day installation by a skilled and friendly BOXT accredited engineer.
Maintain.
Download the BOXT app to keep track of your installation and view all your important documents.
Get your tailored boiler quote in 90 seconds.
Get a fixed price quoteYour BOXT boiler FAQs.
How much does a new boiler cost?
Should I repair or replace my boiler?
What happens during a BOXT boiler installation?
Are BOXT installers Gas Safe registered?
1 Next working day installation when you order before 3pm, subject to availability.
2 £1,795 based on purchase of a Navien NCB 300 30kW. Prices accurate as of May 2025.
3 Terms and conditions apply, visit https://www.boxt.co.uk/boilers/the-boxt-price-promise to find out more.
E.ON Next is a trading name of E.ON Next Energy Limited. E.ON Next Energy Limited is a company registered in England and Wales. Registered number: 03782443. Registered office: Westwood Way, Westwood Business park, Coventry, CV4 8LG. E.ON Next brings you this discount offer through BOXT Limited (CRN: 08086606) whose registered office is at 3320 Century Way Thorpe Park, Leeds, West Yorkshire, England, LS15 8ZB (“BOXT”). This £100 discount is only available to E.ON and E.ON Next customers who have current/active accounts at the time of the installation of the gas boiler installed by BOXT. Only one discount available per boiler installation on all gas boilers. The discount will be applied to the cost of the boiler requested. Installation must be booked within 30 days of the date of the quote provided by BOXT to the customer. No cash alternatives given. E.ON Next and BOXT reserve the right to withdraw or amend this offer at anytime.