Replace your boiler with a new one and save £50 on any boiler. We're working with BOXT, who have over 20,000+ 5-star reviews on Trustpilot for gas installation and heating service(2).
New boiler costs
Navien NCB300 28kw - gas boiler replacement popular on BOXT - from £1,550
We're working with BOXT to install all our new gas boilers. Who have over 20,000+ 5-star reviews 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
- Delivery and installation as soon as the next day (subject to availability and location)
- Boiler installation includes wireless room thermostat, flue, filter and everything else you need
- £50 off every new gas 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.
Boiler replacement that gives you more
Why replace your boiler with BOXT?
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
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.
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.
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 £995 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 pumps - low carbon heating
Consider replacing your gas boiler with a more sustainable and efficient electric air source heat pump. You could get help with the upfront cost through the Boiler Upgrade Scheme.