Free System Boiler Replacement under the UK Government’s ECO4 Grant
System Boiler Replacement with a High-Efficiency Condensing Boiler – Under the ECO4 Scheme
If your home currently has a system boiler, you may be eligible to replace it with a modern condensing boiler under the government-backed ECO4 scheme. While we do not install new system boilers under ECO4, we can upgrade existing system boilers to a high-efficiency condensing model — helping you cut energy bills and reduce carbon emissions.
Why Replace Your System Boiler with a Condensing Boiler?
- Improved Efficiency – Condensing boilers are typically over 90% efficient, compared to older models that may be as low as 60%.
- Lower Energy Bills – More heat from the same amount of fuel means reduced running costs.
- Eco-Friendly – Lower carbon emissions help meet UK net-zero targets.
- Reliable Performance – New boilers come with manufacturer warranties for peace of mind.
ECO4 Scheme Eligibility
- You may qualify for a free or heavily subsidised boiler replacement if:
- Your existing system boiler is inefficient or faulty
- You are a homeowner
- Someone in the household receives qualifying benefits (or meets local authority flex eligibility)
- Your home’s EPC rating is D, E, F, or G
How It Works – System Boiler to Condensing Boiler Replacement
- Free Eligibility Check
- We confirm you meet the ECO4 criteria (e.g. current system boiler in place, qualifying benefits, EPC rating D–G).
- Home Energy Survey
- Our engineer visits your home to assess your current heating system, check boiler condition, and confirm replacement suitability.
- Grant Approval
- We process your ECO4 application and arrange funding for your new A-rated condensing boiler.
- Boiler Replacement
- Your old system boiler is removed and replaced with a high-efficiency condensing boiler, optimised for your home’s heating needs.
- Quality Check & Handover
- We test your new boiler, ensure it’s running efficiently, and show you how to use it for maximum savings.
- Enjoy Lower Bills
- Benefit from improved efficiency, reduced energy costs, and a warmer, more reliable heating system — at little to no cost to you.
Why Upgrade to a Condensing Boiler with ECO4 Funding?
- The UK Government’s ECO4 scheme helps households cut their energy bills and carbon footprint by funding the replacement of outdated, inefficient boilers with modern, A-rated condensing boilers. If your home currently has a system boiler, this is the perfect opportunity to upgrade to a highly efficient condensing model at no cost. With fast installation, zero upfront charges, and long-term energy savings, switching to a condensing boiler is one of the smartest home heating improvements you can make today.
Your System Boiler Funded from Start to Finish
- Under ECO4, eligible households can have their old boiler replaced with a brand-new A-rated combi boiler, fully installed by accredited engineers, without paying a penny.
- Full home energy assessment
- Removal and safe disposal of old boiler
- Professional installation of your new boiler
- Manufacturer warranty for peace of mind
- System testing and demonstration
- Advice on using your new heating system efficiently
Who Qualifies?
- Homeowner or Private Tenant with an existing system boiler
- Home must have an EPC rating of D, E, F, or G.
Benefits-Based Criteria
- Universal Credit
- Working Tax Credit
- Child Tax Credit
- Housing Benefit
- Pension Credit (Savings or Guarantee)
- Income-based JSA or ESA
- Income Support
Why Thousands of Homeowners Are Switching to ECO4 Combi Boilers
- Zero upfront cost – the grant covers the full supply and installation
- Lower heating bills – save up to 30% annually on energy costs
- Eco-friendly – reduces your home’s carbon footprint
- Space-saving – no tanks or cylinders, just one compact unit
- Instant hot water – no waiting for a tank to heat up
- Boosted property value – better EPC rating for your home
Cost Savings & Impact
- Typical energy bill savings around 22–30% per year
- Lower carbon footprint thanks to A-rated technology
- No upfront installation costs—fully government funded
Why Choose Us
We only install A-rated, energy-efficient combi boilers from leading UK brands, ensuring top performance and long-lasting reliability — all backed by manufacturer warranties.
Every home is different. Our team carries out a full property assessment to design the perfect heating solution for your needs, making sure you get the maximum benefit from your ECO4 grant.
Upgrading to an energy-efficient combi boiler reduces your carbon footprint, cuts energy waste, and supports the UK’s journey towards Net Zero emissions.
Common Questions
Most Popular Questions
A system boiler works with a separate hot water cylinder to provide central heating and stored hot water. It’s ideal for homes with higher hot water demand but can be less efficient than modern condensing boilers.
System boilers heat water directly from the mains and store it in a hot water cylinder for later use. They supply central heating through radiators or underfloor heating while ensuring multiple taps can be used at once.
Yes — if you meet the ECO4 eligibility criteria, we can replace your existing system boiler with a brand-new A-rated condensing boiler at no cost.
A condensing boiler is more energy-efficient, takes up less space, heats water faster, reduces heat loss, and can significantly lower your heating bills compared to an older system boiler.
Yes — older system boilers can be less efficient, take up more space due to the separate cylinder, lose heat through stored water, and require more maintenance over time.
A well-maintained condensing boiler can last 10–15 years or more and maintain high efficiency throughout its lifespan, whereas older system boilers often lose efficiency over time.
Yes — upgrading to a condensing boiler can improve your EPC rating by reducing heat loss and improving heating efficiency, making your home more energy-efficient overall.
Yes — condensing boilers can be integrated with certain renewable systems like solar thermal for hot water, providing even greater energy savings.
Most replacements are completed within 1–2 days, including removal of the old system and installation of the new condensing boiler.
Yes — good mains water pressure is important for optimal performance. During your survey, we’ll check your home’s water pressure before installation.
Yes — even if it’s functional, upgrading to a condensing boiler can save money, reduce maintenance issues, and improve heating performance.
We’ll safely remove and dispose of your old boiler and cylinder in line with environmental regulations, freeing up space in your home.
