New boilers installed next day(1)

Replace your boiler with a new one and save £75 on any boiler. Installed by our trusted partner - BOXT, who are rated number one on Trustpilot for gas installation and heating service(2).

Get a new boiler

Worcester Bosch Greenstar 8000 Life gas boiler in black

New boiler costs

Worcester Bosch Greenstar 25i - gas boiler replacement popular on BOXT - from £1920

All our new gas boilers are installed by our trusted partner - BOXT. Their customers have rated them number one for gas installation and heating service on Trustpilot(2). You and your new gas boiler are in trusted hands.

Prices include new boiler installation, parts, labour and VAT
Monthly payment options including 0% deposit available
Up to 10-year warranty
Your new boiler delivered and installed in 24hrs (subject to installer availability)
Boiler installation includes wireless room thermostat, flue, filter and everything else you need
£75 off every new gas boiler.

Get a new boiler

Replacement boiler - we'll beat like-for-like price

If you find the same fixed price boiler installation somewhere else, BOXT will beat the like-for-like price by £50 or give you an Amazon voucher if they can't.

Get a new boiler

Boiler replacement that gives you more

Lower energy bills

New boilers tend to be more efficient than old ones, so you won't spend any more money than you need to on heating.

Reduce your carbon footprint

A new A-rated boiler helps the environment by bringing down your home's carbon emissions.

Smaller boilers

New boilers are generally smaller and quieter than the ones they replace. You'll also have the option of moving your boiler somewhere out of the way.

Better water pressure

Depending on the type of boiler you choose, it can improve your hot water pressure considerably, making a hot shower much more enjoyable.

Unlimited hot water

In flats and small houses where space is at a premium, installing a combi boiler means a hot water tank isn't required. In addition, they only heat up the water you need to use making them very efficient.

Modern boilers and radiators

If you're not moving your boiler, new ones are often more modern and attractive. You can also add new radiators to your installation to replace the old ones.

Why replace your boiler with BOXT?

Get a fixed price
from £1920

Every Gas Safe installation includes a free system cleanse, recycling of your old boiler, pipework alterations and upgrades, a new thermostat and magnetic filter.

Up to 10 year
warranty

If something goes wrong, it’s good to know that you’re covered and that you can get an engineer out to fix the problem as soon as possible, without leaving you out of pocket.

Gas Safe approved
engineers

Every engineer is a Gas Safe registered installer, with plenty of experience fitting boilers. They'll keep the house nice and tidy while they work too.

What do BOXT customers say?

Watch video: Meet Bill from North Wales | BOXT | Trustpilot No1

Read the Bill from north Wales video transcript (PDF 140KB)

BOXT James from Leicester on his new boiler installation

Read the James from Leicester video transcript (PDF 132KB)

BOXT boiler engineer showing customer how to use

Read replacing a combi boiler video transcript (156KB)

What happens when BOXT replace your combi boiler with a new one?

Find out what happens on new boiler installation day with a straight forward combi boiler swap.

Combi boilers are both a high-efficiency water heater and central heating boiler in one single unit, which can improve hot water pressure and mean there's no need for a hot water tank.

You can find out more about boiler replacement and what happens during new boiler installation in our handy guide.

Things to consider when replacing your boiler

boiler engineers installing a new boiler

Guide to new boiler replacement costs

A new boiler can be expensive, especially when unplanned. We explain what you should consider when getting a boiler that can impact the cost.

Learn about boiler replacement costs

UK gas boiler ban 2025

Find out everything you need to know about the boiler ban being introduced in 2025 and what other heating options are available to replace your gas boiler.

No heating or hot water?

A home with no heating or hot water is no fun. Here's what to do if you find yourself in hot water when your boiler breaks down.

What to do when there's no heating

Reducing your carbon footprint

As Britain’s biggest generator of zero-carbon electricity(3) we provide several low carbon heating options so we can all contribute to achieving our Net Zero target.

Waste less heat, energy and money with insulation

Save up to £530 on energy bills(4) wrapping your home with insulation, as less heat is wasted by escaping out of your home. Your new boiler will last longer too as it's not working as hard to heat your home.

Find out about insulation

Cosy home with Air Source Heat Pump outside

Air source heat pumps - low carbon heating

Consider replacing your gas boiler with a more sustainable and efficient electric air source heat pump. You could reduce your carbon footprint and save up to £1,548 over 10 years(5) with the help of the Renewable Heat Incentive subsidies.

Find out about heat pumps

Notes

Next day installation available in most areas based on engineer availability, location and completing your order before 3pm
Trustpilot has rated BOXT as best in the gas installation service category: https://uk.trustpilot.com/categories/gas_installation_service

UK Fuel Mix disclosure information, published by Government Department BEIS, recognises electricity from wind, solar and nuclear fuel produces zero carbon dioxide emissions at the point of generation.

The zero-carbon electricity purchased is supplied to the National Grid. Customers receive electricity via the National Grid, not directly from zero-carbon generators.

The below table summarises zero-carbon generation by company demonstrating EDF generating 32.4%. The data supporting the table below and the % values is sourced from a mixture of industry settlement data and the UK government renewable obligation database.

ZERO-CARBON GENERATION SUMMARY BY COMPANY		2020	2020
Supplier name	zero-carbon	GWh of zero-carbon electricity generation	% of overall zero-carbon electricity generation
EDF	zero-carbon	37,968	32.4%
CENTRICA	zero-carbon	9,101	7.8%
RWE	zero-carbon	5,060	4.3%
E.on	zero-carbon	2,195	1.9%
SSE	zero-carbon	5,424	4.6%
ScottishPower	zero-carbon	4,364	3.7%
Drax	zero-carbon	-	-
Orsted	zero-carbon	9,523	8.1%
EPH	zero-carbon	-	-
Equinor	zero-carbon	1,182	1.0%
Vattenfall	zero-carbon	1,783	1.5%
Fred Olsen Renewables	zero-carbon	1,100	0.9%
Macquarie	zero-carbon	3,504	3.0%
Ventient Energy	zero-carbon	562	0.5%
Statkraft	zero-carbon	370	0.3%
Eneco	zero-carbon	316	0.3%
Falck Renewables	zero-carbon	251	0.2%
RES	zero-carbon	320	0.3%
SGRE	zero-carbon	245	0.2%
Greencoat	zero-carbon	318	0.3%
Community Windpower	zero-carbon	329	0.3%
OTHER	zero-carbon	33,243	28.4%
TOTAL	zero-carbon	118,805	100%

Estimates based on a gas-heated detached home. Figures are based on fuel prices as of April 2019.
sources:
- https://energysavingtrust.org.uk/advice/roof-and-loft-insulation
- https://energysavingtrust.org.uk/advice/cavity-wall-insulation
Calculation is based on:
- Heat pump on offer is a package of 7KW air source heat pump with designed efficiency (SCOP) of 3.48, radiator upgrades, hot water tank and installation.
- Typical upfront price of £8,999 is for a 3 bedroom property in the South of the UK with annual heat demand of 13,903 kWh consumption for heating and hot water, at least 150mm insulation and built between 1960-1980.
- Our expert installer will provide a more accurate assessment of heat pump cost & savings based on your individual needs and house type
- Boiler cost of £3,324 from recent govt study where we assume a non-combi boiler of 24KW and boiler efficiency of 93%
- It does not differentiate between bedroom sizes so its an average across all property types: https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/913508/cost-of-installing-heating-measures-in-domestic-properties.pdf
- Heat pump lifetime is usually 15-20 years compared to boiler of 10 years
- Energy & carbon price assumptions from https://energysavingtrust.org.uk/about-us/our-calculations
- RHI subsidy of £7,574 (based on 10.92p/kWh)