Gas boilers

Fixed-price, next day gas boiler installation¹

Get a new boiler from £1,790 or £12 a month² with flexible finance options. Plus, get a free Hive Thermostat Mini with code FREEHIVEMINI*.

We'll beat any like-for-like price

UK's most trusted boiler installers

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.

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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.

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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.

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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.

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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.

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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

Good gas boiler installation experience Helpful with boiler selection and installation survey. Fixed price installation for 30 days, giving time to decide. Boiler delivered and installed on the agreed date and times, to my satisfaction.

Mr D Plane

From ordering to completion within a week couldn't ask for more. And better than half the quoted price of British Gas boiler installation.

Mrs Patricia Green

Everything did go well with the purchase of our new gas boiler from Boxt. I did have my concerns about purchases from BOXT rather than British Gas, but the price difference pushed my into taking that chance, and I'm glad I did

Allan Gourdie

An extremely positive experience with supplying and fitting my new Worcester gas boiler.

Peter Denyer

I was amazed at how quick they were at removing my old gas boiler and replacing with a new one. All in all, it took them about 5 hours from arriving till leaving. I would definitely recommend Boxt to anybody who needs a new boiler.

Howay Thelads

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.

Worcester Bosch

Explore boilers from Worcester Bosch

Vaillant

Discover new boilers from Vaillant

Navien

Learn more about our range of Navien boilers

Baxi

Find a new Baxi boiler for your home

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

Get a fixed price Worcester boiler

Gas boiler FAQs

On average, a gas boiler should last you around 10-15 years if well maintained. It's recommended to book an annual boiler service to keep on top of any problems that may arise with your boiler. Especially as your boiler gets older, it may start to become less efficient, so a regular annual service will help to identify any faults and repair them before they turn into larger problems, like your boiler not working.

Get a new gas boiler with BOXT

*Saving of £173.55 based on the Ofgem medium annual gas consumption of 11,500 kWh at the October 2025 UK average unit price of 6.288 pence per kWh including VAT. Emissions saved per year: 508 kg CO2 (0.184kg per kWh). Actual savings will vary depending on individual circumstances. Terms and conditions apply to Free Hive Mini promotion.

^¹Next working day installation when you order before 3pm, subject to availability.

^²New boiler prices start from £12 a month with a 50% deposit.

BOXT Limited is authorised and regulated by the Financial Conduct Authority. FCA register No. 767308. Finance is offered through HomeServe Finance Limited (FRN 994955) and in some cases we also lend with Propensio Finance Limited (FRN 806409). Finance available subject to status, affordability and a credit check. Terms and conditions apply. BOXT Limited acts as a credit broker and is not a lender. Registered in England & Wales company No. 08086606 VAT No. 257059782. BOXT Limited, 3320 Century Way, Thorpe Park, Leeds, West Yorkshire, LS15 8ZB.