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.

£100 off any boiler - offer ends midnight Sunday!
Discount available in the booking calendar

Important information about COVID-19

All our partners are working hard to serve our customers and keep everyone safe during the coronavirus pandemic. If you have any questions or concerns, our partners will be happy to help

Free Amazon Echo Show 5

Free Amazon Echo Show 5 when your new boiler is installed worth £59.99

Exclusive EDF offer

  • Get a quote from BOXT using the ‘Find a new boiler’ links on this page

  • Buy your boiler and book your installation online through BOXT

  • Once your new boiler has been fitted, BOXT will send you an email with your unique code and instructions on how to claim your offer

Please note: you can only claim this offer by following the steps above.

Terms and conditions apply


Worcester Bosch Greenstar 25i

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

Boiler price promise

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 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.


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

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

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 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

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

thermal heat loss of an insulated house

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.

air source heat pump in modern garden

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 £2,755 over 10 years(5), due to the Green Homes Grant and Renewable Heat Incentive subsidies, and lower running costs than a gas boiler.

Make your heating even smarter

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

Picture of smart radiator valves

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.

Picture of a smart thermostat

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.

Picture of a smart home assistant

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.