Boiler Upgrade Scheme
Department for Energy Security and Net ZeroEngland, Wales£3k – £9k
Who can apply
your property must be a home or small or medium non-domestic building in England or Wales. The maximum installation capacity of 45 kWth covers the vast majority of these properties. The overall system capacity for any shared ground loop system must not exceed 300 kWth. your property must have a valid energy performance certificate.where a low carbon heating system has been commissioned prior to an installer submitting a voucher application, installers must ensure that the voucher application has been or will be, properly made within 120 days of the commissioning date stated on the MCS certificate.biomass boilers are only eligible in properties that are both in a rural location and not connected to the gas grid. Heat pumps do not have either of these restrictions.you must be fully replacing an existing fossil fuel system such as an oil or gas boiler, or an electric heating system such as storage or panel heaters. Funding will not be available for the replacement of existing low carbon heat systems.the installation cannot be funded by more than one source of public funds and you cannot apply if you have already been given government funding or support for a heat pump or biomass boile
Key criteria
- Property in England or Wales
What it funds
The Boiler Upgrade Scheme provides grants to encourage property owners to replace existing fossil fuel heating with more efficient, low carbon heating systems including air source heat pumps, ground source heat pumps and, in limited circumstances, biomass boilers. You can get:£7,500 off the cost and installation of an air source heat pump£7,500 off the cost and installation of a ground source heat pump£5,000 off the cost and installation of a biomass boilerThese grants help property owners overc
How to apply
The application is installer-led, with the installer applying for the grant on the property owner’s behalf. Your chosen installer will need to be certified by the Microgeneration Certification Scheme (MCS), a nationally recognised standards organisation that gives you assurance of the quality of your product and competence of your installer. It also ensures that your installer complies with high consumer protection standards.Your chosen installer will:discount the value of the grant from your invoice.apply to Ofgem, the scheme administrator, for a grant voucher.provide your details to Ofgem, who will then email you asking for you to consent to the installer applying on your behalf.liaise with Ofgem on most matters related to the scheme.complete the installation in line with industry standards and scheme requirements.redeem the voucher and receive the grant following installation and comm
Evidence you'll need
- Installer quote (MCS certified)
- Property ownership evidence
- EPC
Last checked against the official source: 3 Jul 2026. Scheme parameters are set by the funder and can change — verify before applying, or let us do it for you.
Ask about eligibility
Plain-English answers about this scheme's published criteria — not application advice.
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