Order by 3pm for next working day installation
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Over 200,000 BOXT customers
Gas boilers
Gas boiler installation
Save £110 on new boilers with code BOILERS110**, or you can use FREESERVICEPLAN to get a boiler service plan free for one year*
We'll beat any like-for-like price¹
UK's most trusted boiler installers²
One year workmanship warranty on every installation
Popular gas boilers
Worcester Bosch Greenstar 4000
BOXT's best selling boiler
Our best selling boiler, and for good reason. The Greenstar 4000 comes in a range of outputs so it can efficiently power different sized homes.
Navien NCB 300
Super efficient. Great value for money.
Featuring a smart digital display so you can easily control your heating and hot water, plus a stainless steel heat exchanger to provide long-term efficiency.
Vaillant ecoFIT Pure
Worcester Bosch's most powerful wall-hung model
This compact model fits seamlessly into your home, while offering plenty of power with quality components to ensure long-lasting reliability and efficiency.
Worcester Bosch Greenstar 1000
A budget friendly boiler
A-rated for efficiency to help save on energy bills, and with Worcester Bosch's Quick Tap feature to help save on wasted water, the Greenstar 1000 is a budget-friendly boiler that helps you keep making savings.
How much is a new gas boiler?
At BOXT, we specialise in gas boilers.
We regularly review our prices and uphold our Price Match Promise, where we guarantee to beat any like-for-like boiler installation quote by £50.
With BOXT, you can get a new gas boiler installed from £1,790 or from £24 a month with no deposit.
The cost of your new gas boiler will depend on the size of your home and what is required to heat, such as the number of bathrooms.
Find the best gas boiler for your home and get a fixed price quote in a few minutes online.
National World's review of a new gas boiler from BOXT
"I had my old back boiler replaced by BOXT and my only regret is not having done it sooner"
"I was dreading replacing our ageing and inefficient back boiler with a new system but knew it had to be done. It was bad for the environment, costing me more than it should, could break down at any time and, due to its age, might also pose a safety risk.
The entire process, from going on the website and booking, to firing up my new boiler was done and dusted in less than a week. I’m still reeling from the ease of it all. BOXT understands there are many people just like me who don’t understand the first thing about boilers and have simplified the process so you don’t need to."
- Jamie Jones, Editor, National World. Read the review.
BOXT gas boiler installation reviews
Gas boiler benefits
A-rated
All new gas boilers are A-rated for energy efficiency.
Cheaper
To run than electric boilers on average.
Options
There are plenty of gas boilers on the market, meaning lots to choose from.
Affordable
Gas boilers are the most affordable heating option for those on a budget.
Gas boiler brands
We stock a range of top boiler brands. Find your new A-rated gas boiler online with BOXT today.
Getting a new gas boiler with BOXT
Discover
Answer a few questions about your home online to get a fixed price quote in 90 seconds
Choose
We'll give you boiler recommendations based on your answers, then choose your boiler and payment option
Installation
A BOXT Gas Safe registered engineer can install for you the next working day if ordered before 3pm
Maintain
Keep track of your install with the BOXT app, and find all your important documents in one place
Gas boiler FAQs
Get a new gas boiler with BOXT
*Only one promo code can be used per order. Service Plan is free for 12 months then automatically renewed at £8.99 a month for homeowners or £11.99 for landlords, unless cancelled. Offer ends 31st March, 2026. Click here for the full Terms & Conditions of Free Service Plan offer.
**Terms and conditions apply to £100 discount promo code. Click here to learn more.
¹Learn more about the BOXT Price Match Promise here.
²Most trusted based on the highest proportion of five-star Trustpilot reviews against direct competitors.