New boilers installed next day(1)

We’ve teamed up with BOXT, the number one rated gas installation and heating service on Trustpilot(2) to replace your boiler.

Get a new boiler

Worcester Bosch Greenstar 8000 Life gas boiler in black

Save £50 on any BOXT boiler

We’ve teamed up with BOXT, the number one rated gas installation and heating service on Trustpilot(2).

Prices include installation, parts, labour and VAT
Monthly payment options including 0% deposit available
Up to 10-year warranty
Delivered and installed in 24hrs (subject to installer availability)
Includes wireless room thermostat, flue, filter and everything else you need

Get a new boiler

How much is a new boiler?

Worcester Bosch Greenstar 25i - Popular on BOXT
from £1920

Price includes installation, parts, labour and VAT
Monthly payment options including 0% deposit available, subject to status
10-year warranty
Delivered and installed in 24hrs (subject to installer availability)
Includes wireless room thermostat, flue, filter and everything else you need

This is a guide price for this boiler, which might not be suitable for your home

Get a new boiler

New boiler and value you can trust

BOXT are so confident their prices are the lowest that if you find exactly the same fixed price boiler installation cheaper elsewhere, they will either beat the like-for-like price by £50 or give you a free Amazon voucher if they can't.

Get a new boiler

Get more than just a new boiler

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.

Greener choice

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

Space-saving

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 and stylish

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 replacing a combi boiler with BOXT?

Find out what happens on 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.

Things to consider when replacing your boiler

Boiler grants

Discover what schemes and subsidies are available to help you with the cost of a new boiler.

Learn about boiler grants

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.

Learn about the gas boiler ban

Helping you achieve Net Zero

As Britain’s biggest generator of zero-carbon electricity(3) we provide several heating options to help you lower your home's carbon footprint

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

Air source heat pumps - the future of heating

Consider replacing your gas boiler with a more sustainable and efficient electric air source heat pump. In addition to helping the environment, you could save up to £1,548 over 10 years(5), due to the Renewable Heat Incentive subsidies.

Find out about heat pumps

Make your heating even smarter

Our range of smart products can help you save money without even thinking about it.

Smart radiator valves

There’s no point heating an empty room, but manual radiator valves rely on you remembering to turn them down. Let a smart radiator valve do that for you.

Get smart radiator valves

Smart thermostats

Our great range of smart, learning thermostats will adjust your heating automatically depending on the weather, the time of day and your settings.

Get a smart thermostat

Smart voice control

Control your home's heating with a smart home assistant such as Amazon Echo or Google Home, which also gives you remote control via their smartphone apps.

Get smart voice control

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 into 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 29.4%. 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		2019	2019
Supplier name	zero-carbon	GWh of zero-carbon electricity generation	% of overall zero-carbon electricity generation
EDF	zero-carbon	42,233	29.4%
CENTRICA	zero-carbon	10,176	7.1%
RWE	zero-carbon	3,656	2.5%
E.on	zero-carbon	3,704	2.6%
SSE	zero-carbon	6,360	4.4%
ScottishPower	zero-carbon	4,609	3.2%
Drax	zero-carbon	13,573	9.5%
Orsted	zero-carbon	6,869	4.8%
EPH	zero-carbon	2,430	1.7%
Equinor	zero-carbon	1,091	0.8%
Vattenfall	zero-carbon	1,602	1.1%
Fred Olsen Renewables	zero-carbon	1,130	0.8%
Macquiearie	zero-carbon	371	0.3%
Ventient Energy	zero-carbon	594	0.4%
Statkraft	zero-carbon	403	0.3%
Eneco	zero-carbon	347	0.2%
Falck Renewables	zero-carbon	250	0.2%
RES	zero-carbon	305	0.2%
SGRE	zero-carbon	371	0.3%
Greencoat	zero-carbon	371	0.3%
Community Windpower	zero-carbon	371	0.3%
OTHER	zero-carbon	42,816	29.8%
TOTAL	zero-carbon	143,632	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
- Car emission from UK Government GHG Conversion Factors for Company Reporting 2020, assuming 10,000 miles for an average size petrol car
- RHI subsidy of £7,525 (based on 10.85p/kWh)

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Notes