As the UK advances towards a net-zero future, the government continues to incentivise cleaner, low-carbon heating alternatives for households and small businesses. The Boiler Upgrade Scheme stands out as a key pillar in this initiative with an aim to provide substantial grants to the people who want to adopt heat pumps or biomass boilers. But navigating who qualifies is not always straightforward and easy as it seems.
This highly informative and detailed guide offers you a complete breakdown of boiler upgrade scheme eligibility by focusing on both the homeowners and installers responsibilities which are outlined by the latest official guidance from Ofgem and the DESNZ.
What Is the Boiler Upgrade Scheme?
To encourage greener living, the UK government introduced the BUS. It is a scheme that aims to support the transition to low-carbon heating for homes in England and Wales:
- £7,500 for air source heat pumps (ASHPs)
- £7,500 for ground source heat pumps (GSHPs)
- £5,000 for eligible biomass boiler installations (in specific rural scenarios)
Funds are not transferred to the applicant directly. Instead, the grant amount is subtracted from the total installation cost by the certified installer which makes this process seamless and upfront for property owners.
Also Read: Air Source Heat Pump Grant Eligibility: Things You Need to Know in 2025
Who Is Eligible? Key Criteria for Property Owners
Eligibility is based on a mix of factors, including property type, existing heating systems, and compliance with installation standards.
To qualify, your property must:
- Be located in England or Wales
- Be a domestic or small non-domestic property
- Applicants must have a current EPC that was issued within the previous 10 years.
- Not be social housing or a newly built development unless self-built
- Be replacing a system that uses fossil fuels or traditional electric heating (excluding existing heat pumps)
If your home has been renovated or converted, you may still qualify either as an existing property or as a self-build if it was not previously used as a dwelling.
Understanding System Eligibility: What Equipment Qualifies?
The scheme is designed to promote systems that meaningfully reduce carbon emissions and operate efficiently. Eligible technologies include:
1. Air Source Heat Pumps (ASHPs)
Only air-to-water systems are supported, as they integrate with central heating and hot water systems. Air-to-air models, despite their growing popularity, are not currently funded, although ongoing consultations suggest this may change in the near future.
2. Ground Source Heat Pumps (GSHPs)
These systems draw warmth from underground through ground loops. Shared loop configurations are allowed under specific criteria, provided that all connected systems are compliant and registered.
Installer Requirements: Why MCS Certification Matters
A key requirement of the scheme is that only MCS-certified installers (Microgeneration Certification Scheme) can manage applications and complete installations.
The installer is responsible for:
- Confirming your property’s eligibility
- Submitting the application
- Redeeming the grant after successful installation
- Maintaining documentation for six years
- Ensuring the installation complies with the current BUS regulations
Installers cannot submit an application with an MCS certificate or apply retroactively for a system commissioned over 120 days ago.
How to Apply: A Step-by-Step Overview
Although the process is installer-led, property owners must play an active role in confirming eligibility and granting consent. Here’s how it works:
Step 1: Find an MCS Installer
Infinity is an MCS certified company, eligible to apply on your behalf.
Step 2: Site Visit and Quote
Your installer will assess the property, recommend a suitable system, and issue a quote showing the grant deduction.
Step 3: Installer Submits Application
If all requirements are met, your installer will submit the application through the official BUS portal.
Step 4: Confirm Your Consent
You’ll receive a consent request from Ofgem. Your response is essential for voucher issuance.
Step 5: Installation and Redemption
Once the system is installed, the installer submits proof, and Ofgem processes the grant redemption.
Voucher validity:
- 3 months for ASHPs and biomass boilers
- 6 months for GSHPs
Recent Developments in 2025: What’s New?
Several key updates have expanded access and simplified processes:
- Increased funding: Budget extended to £295 million for 2025/26, with Ofgem authorised to over-allocate vouchers up to £280 million to meet demand
- Third-party ownership: Proposals are being reviewed to allow models like heat-as-a-service or lease agreements, reducing upfront costs for consumers
- Simplification plans: There’s active consultation to streamline eligibility rules, particularly for properties with standalone layouts or hybrid systems
These updates are designed to enhance uptake and broaden appeal to a wider range of households and businesses.
Infinity: Helping You Navigate Every Step of the Boiler Upgrade Scheme Eligibility
Infinity understands that navigating the Boiler Upgrade Scheme can be overwhelming — especially with technical requirements, documentation, and deadlines involved. That’s why we take a hands-on approach, guiding you through every stage of the process. As a fully MCS-certified installer, we handle eligibility checks, property assessments, system recommendations, and all application submissions to Ofgem, ensuring everything aligns with the latest scheme regulations.
Our role doesn’t end with paperwork. We deliver high-quality installations that meet current energy standards and help you maximise your grant without delays or hidden costs. With a proven track record and deep knowledge of low-carbon heating technologies, Infinity is your trusted partner for a smooth, compliant, and efficient transition to a more sustainable home heating system.
Conclusion
Adopting a low-carbon heating system is now easier, more affordable, and more rewarding than ever. With government grants available through the Boiler Upgrade Scheme, understanding whether your property qualifies and ensuring the application is done right, homeowners now have real financial support to invest in long-term energy efficiency.
Connect with Infinity now and embrace a smarter, cleaner way to heat your home. Let’s shape a sustainable future, together.