Could you get a free oil boiler?

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Understanding boiler - grants, replacements and the boiler scheme

We've been installing boilers across the UK for eligible customers under the government's ECO scheme since 2013. You'll see the term “free boiler” used a lot to describe this, but boiler grant, boiler replacement and boiler scheme mean the same thing too.

If you want to find out more, give us a call   or   between 8am-8pm Monday to Friday and we'll be able to help.

And if you want to read more on what the government has to say about the the ECO scheme, visit the GOV.UK website. Please note - free boilers are currently funded by the 'Affordable Warmth' part of the ECO scheme

Did you know? Since the ECO scheme started, we've installed over 60k boilers saving each property hundreds of pounds on their energy bills.

Boilers explained

We offer a like for like boiler replacement scheme. We fit brand new A-rated energy efficient boilers which are equivalent to the type of boiler you currently have fitted (combi, system or oil boilers). If you currently have a back boiler we replace this with a new system or combi boiler. We’ve explained these boiler types below to help you better understand what you currently have.

Combi boilers

Combi (or combination) boilers are the UK’s most popular type for gas central heating and domestic hot water. As with other variants they provide heat to your radiators, but differ by only heating hot water for your taps on demand (when you turn it on or run a hot shower). This means you’re not keeping a full cylinder of hot water heated if only a small amount of hot water is required, and you’re saving energy. They also don’t need extra space for a cylinder and they deliver water to your taps at mains pressure, which can make for a more powerful shower.

Combi boilers at a glance:

  • Instant hot water at mains pressure
  • No need for a separate hot water cylinder
  • Available in a range of sizes to suit your home, including ultra- compact models for flat
  • Recommended by the Energy Saving Trust Ideal for households with low hot water demand
Water Supply
Water supply

System boilers

System boilers are particularly suitable for heating larger houses that use more hot water – (i.e. houses that have more than one bathroom). It pumps hot water to the radiators and cylinder (usually in the airing cupboard or loft). And you can run more than one tap at the same time.

System boilers at a glance:

  • Let’s you run more than one hot water tap at the same time
  • Economical to run
  • Key components (like expansion vessel and modulating pump) are built-in
  • Available in different sizes, but particularly well-suited to larger homes
  • Recommended by the Energy Saving Trust

Coventional boilers

Conventional/ Heat only Boilers are very similar to System boilers as both require a separate hot water cylinder. However, certain components are external to the boiler (diverter valve, pump) and are usually located next to the cylinder within the airing cupboard. Installing a new heat-only boiler in your home can be a straightforward job as most can be added to existing systems, making them a very versatile option, and they’re easy to use.

Heat-only boilers at a glance

  • In certain circumstances can be simple to install
  • Compact designs
  • Let’s you run more than one hot water tap at the same time
  • Available in a range of sizes
  • Can replace any existing heat-only boiler
  • Recommended by Energy Saving Trust
Water Supply

Customer feedback

“Very grateful for npower's support. They're a very good company and I'm pleased with the new boiler.”

“They did exactly what they said they were going to do. They were really quick, the boiler is amazing and I'm extremely happy.”

Check and see if you’re eligible for a free or subsidised new boiler

Check your eligibility

Or call us on

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View our opening times and call charges

Energy saving improvements

Making simple changes to help keep your home warmer

More about energy saving

Free insulation

Upgrading your insulation help keep the cold out

More about free insulation