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Boiler upgrade grants

Yes you can have your boiler replaced for free. Check if you qualify.



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Boiler Upgrade Grants

If your boiler is over 12 years old, it may be time for an upgrade. The Boiler Upgrade Grants under ECO4 make it possible to replace your outdated boiler with a more energy-efficient combi boiler at absolutely no cost to you.

Do I Qualify for a Boiler Upgrade through ECO4?

Funding is primarily aimed at lower-income households or individuals with medical conditions that are adversely affected by cold weather.

  • Receive means-tested benefits, or
  • Total household income below £31,000
  • Medical conditions worsened by cold conditions

Worcester Bosch combi boiler

Financial Benefits of Upgrading Your Boiler

Upgrading to a new boiler can significantly reduce your heating bills thanks to their superior energy efficiency. Modern condensing boilers are designed to work with the latest smart technologies, enhancing their effectiveness even further.

The amount you save will depend on your current boiler's energy efficiency rating and the type and size of your property. Generally, larger homes tend to yield more substantial savings.


Boiler Savings Calculator

Select the Age of Your Boiler:


Annual Savings by Boiler Efficiency Grade

Here’s a breakdown of potential annual savings based on the energy efficiency grade of your existing boiler and its approximate age:

Grade G Boiler (under 70% efficiency, approx. 25+ years old)

  • Detached House: £340 - £380
  • Semi-Detached House: £220 - £260
  • Detached Bungalow: £170 - £210
  • Mid-Floor Apartment: £80 - £110
  • Mid-Terrace House: £180 - £220

Grade F Boiler (70% to 74% efficiency, approx. 20+ years old)

  • Detached House: £230 - £270
  • Semi-Detached House: £150 - £190
  • Detached Bungalow: £120 - £150
  • Mid-Floor Apartment: £50 - £80
  • Mid-Terrace House: £130 - £160

Grade E Boiler (74% to 78% efficiency, approx. 15+ years old)

  • Detached House: £180 - £220
  • Semi-Detached House: £130 - £170
  • Detached Bungalow: £100 - £140
  • Mid-Floor Apartment: £50 - £70
  • Mid-Terrace House: £110 - £150

Grade D Boiler (78% to 82% efficiency, approx. 10+ years old)

  • Detached House: £140 - £180
  • Semi-Detached House: £110 - £150
  • Detached Bungalow: £90 - £120
  • Mid-Floor Apartment: £40 - £60
  • Mid-Terrace House: £100 - £130

Upgrading to a new boiler not only reduces your heating bills but also enhances the comfort of your home. The funding options available mean that you can make this upgrade at little to no cost to you!

Additional Benefits of an Efficient Boiler




Improve Your Home with ECO & GBIS Grants

Learn more how our grant service can upgrade your home at absolutely no cost to you.

Eco4 Home Retrofit Guide

Apply for a grant,
in 60 seconds.

Do any of these Apply to you?

  • Condition affected by cold
  • Recieve income related benefits
  • Household income below £31,000



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