Free Back Boiler Replacement For UK Households Under ECO4

See how to replace your old back boiler with a new efficient boiler model at no upfront cost under the ECO4 scheme.

If you’re still using an old, inefficient back boiler, you’re likely paying more than necessary on your energy bills. Outdated boilers consume more fuel, provide uneven heating, and are prone to breakdowns especially in winter. The ECO4 scheme, funded by the UK government, allows eligible households to replace these old boilers with modern, efficient boilers at no upfront cost. This guide explains how it works, who qualifies, and how to apply through Cozyfy.

What Is The ECO4 Scheme?

The Energy Company Obligation (ECO4) is a government-backed scheme launched in 2022. Its goal is to help low-income households improve energy efficiency by funding heating upgrades and insulation. If you qualify, the scheme can cover the full cost of a new boiler and installation. You may be eligible if:

Who Is Eligible?

You receive certain benefits (Universal Credit, Pension Credit, Child Benefit, Housing Benefit).
Your home has an EPC rating of D, E, F, or G.
You own your home and have a working gas supply (or can be connected).
Your current heating system is old, inefficient, or a back boiler.

Why You Need To Replace Your Back Boiler?

Back boilers, once common in UK homes, are now outdated and less efficient compared to modern boilers. They:

Operate at ~70–80% efficiency (declines with age)
Require a separate hot water tank, taking up extra space
Often lack modern safety and control features
Are costly to maintain and repair

Replacing a back boiler with a condensing combi boiler offers:

90–98% efficiency
Instant hot water and heating without a tank
Lower carbon emissions
Compatibility with smart thermostats
Lower energy bills and reduced maintenance

Types Of Boiler Grants Under ECO4

Free Combi Boiler Grant: Ideal for small to medium homes; provides hot water and heating in one compact unit.
Free Boiler Replacement Grant: Swap your old, non-condensing boiler for a new energy-efficient model like the Worcester Bosch Greenstar 4000.
Full Central Heating Grant: For homes without central heating; includes boiler, radiators, and pipework.
Insulation + Boiler Grant: Combine a new boiler with loft or wall insulation for maximum savings.

How To Apply For Free Back Boiler Replacement?

Step 1: Check Eligibility: Use Cozyfy’s free online form to confirm you qualify.
Step 2: Book a Survey: A certified engineer visits your home to assess your heating needs (10–15 minutes).
Step 3: Approval: Once approved, installation is arranged within a few days.
Step 4: Installation: Your new A-rated boiler is installed at no upfront cost, complete with warranty.

Environmental Benefits

Older boilers produce higher CO₂ emissions, contributing to climate change. ECO4-funded condensing boilers reduce fuel consumption, helping the UK work towards its net zero target by 2050. This means you save money while reducing your carbon footprint.

Benefits Of Installing A New Combi Boiler

Lower Heating Costs: Modern boilers use less fuel, cutting bills by up to 35%.
Better Home Comfort: Consistent and reliable warmth during winter.
Smart Heating Controls: Optimise energy use with app-based thermostats.
Higher Property Value: Improved EPC rating increases home resale appeal.
No Upfront Cost: Fully funded by ECO4 if you qualify.

The ECO4 scheme runs until March 2026, but funding is limited and demand is high. Applying early increases your chances of securing a free boiler replacement through Cozyfy.

Conclusion

Replacing your old back boiler with a modern, energy-efficient system through the ECO4 scheme is a cost-free way to cut energy bills, improve comfort, and reduce environmental impact. Cozyfy makes the process simple from checking eligibility to installation.

Check Your Eligibility Today!