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Key Changes to Boiler Upgrade Scheme Starting April 2026 What You Need to Know

  • Writer: Liam Walsh
    Liam Walsh
  • Mar 27
  • 3 min read

The UK government is updating the Boiler Upgrade Scheme (BUS) with new rules coming into effect on 28 April 2026. These changes aim to make low carbon heating more accessible, improve flexibility for installers, and strengthen protections for consumers. If you are considering upgrading your heating system or are an installer working in this sector, understanding these updates is essential. This post breaks down the key changes and what they mean for homeowners and professionals alike.



Expanded Eligibility for Grants


One of the most significant updates is the inclusion of air-to-air heat pumps in the scheme. Starting April 2026, these systems will qualify for a £2,500 grant when installed in domestic properties. This addition broadens the range of low carbon heating options available to homeowners.


Previously, the scheme focused mainly on air-to-water heat pumps and biomass boilers. By including air-to-air heat pumps, the government aims to encourage more households to switch to greener heating solutions that can reduce carbon emissions and energy bills.


Combined Heating Systems Allowed


The updated scheme also permits heat pumps to be installed alongside other non-fossil fuel heating systems as part of a combined setup. For example, a homeowner could install an air-to-air heat pump alongside solar thermal panels or a biomass boiler. This flexibility allows for tailored heating solutions that better meet individual household needs and improve overall energy efficiency.



New Rules for Installers on Grant Application


Installers will face new requirements on how they apply the grant to customers. Instead of asking customers to pay the full price upfront and then claim the grant separately, installers must now:


  • Apply the grant as an upfront discount on the installation price.

  • Clearly show customers the price before and after the grant is applied.

  • Avoid requesting the grant amount separately from the customer.


This change improves transparency and helps customers understand the real cost of their heating upgrade. It also reduces confusion and administrative burden for homeowners.



Changes to EPC Requirements


Energy Performance Certificates (EPCs) have been a key part of the application process for BUS grants. The new rules remove the requirement for a valid EPC to apply for the scheme. However, if an EPC exists for the property, it must still be submitted.


Instead of an EPC, installers will now need to provide alternative evidence to support the application, such as:


  • A recent utility bill showing energy usage.

  • Photographs of the current heating system.


This adjustment makes the application process more accessible, especially for properties without a recent EPC, while still ensuring that the heating upgrade is appropriate for the home.



Certification and Compliance for Installers


To maintain compliance with the updated scheme, installers must hold the appropriate Microgeneration Certification Scheme (MCS) certification for each technology they install. This includes any new technologies added to the scheme, such as air-to-air heat pumps.


This requirement ensures that installations meet quality and safety standards, protecting consumers and maintaining the integrity of the scheme.








What These Changes Mean for Homeowners


For homeowners, the updated Boiler Upgrade Scheme offers more options and clearer pricing when upgrading to low carbon heating. The inclusion of air-to-air heat pumps means more affordable access to energy-efficient heating systems that can reduce bills and carbon footprints.


The upfront discount approach simplifies the financial aspect, making it easier to understand the true cost of installation. Plus, the relaxed EPC requirements reduce barriers for those without recent certificates.


If you are considering a heating upgrade, now is a good time to research installers certified under the updated scheme and explore which technologies best fit your home.



Final Thoughts


The Boiler Upgrade Scheme changes coming in April 2026 mark a clear step toward making low carbon heating more accessible and transparent. By expanding eligibility, simplifying grant application, and strengthening consumer protections, the government is supporting the transition to greener homes.


If you'd like to discuss any of this with our team we'd be pleased to help.



 
 
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