Changes to Boiler Upgrade Scheme (BUS) come into effect

As part of the Government’s aim of accelerating the deployment of low-carbon heating, and following a consultation and Parliamentary approval, changes to the Boiler Upgrade Scheme came into force on 28 April 2026.

The changes focus on expanding eligibility, improving flexibility for installers, and strengthening consumer protections.

Expanded technology eligibility

• Air-to-air heat pumps will become eligible for a £2,500 grant in domestic properties.
• Heat pumps may be installed alongside non-fossil fuel supplementary heating appliances as part of multi-technology installations.

Upfront grant deduction

• Installers must deduct the grant value as an upfront discount to the installation cost and provide the property owner with a quote showing the cost before and after the grant is applied.
• To remain compliant with BUS requirements, installers must not request or accept payment of the deducted grant amount.

Consumer protection and certification

• Updates to align with MCS redeveloped installer scheme.

Updated EPC requirements

• Properties no longer need a valid EPC to apply for BUS.
• Installers must provide alternative evidence, such as a recent utility bill and photos of the existing heating system.
• Where a valid EPC exists, it must still be submitted.

Updated BUS guidance (version 5) has been published and can be found on the Ofgem website.

With the expansion of eligible technologies under the Boiler Upgrade Scheme, it’s important to note that installers must have MCS certification for each of the low-carbon technologies they plan to apply for and install. OFTEC offers MCS registration.

For more information visit www.oftec.org/technicians/areas-of-registration/mcs-registration/

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