Boiler Upgrade Scheme (BUS)
UK Government · England and Wales
The Boiler Upgrade Scheme supports the decarbonisation of homes and small and medium non-domestic buildings by providing grants to replace fossil fuel heating systems with low carbon alternatives such as heat pumps and biomass boilers.
Summary
Deadline
30 Dec 2027
Complexity
Medium
Time to apply
20-60 hours
Updated
9 Jun 2026
The Boiler Upgrade Scheme supports the decarbonisation of homes and small and medium non-domestic buildings by providing grants to replace fossil fuel heating systems with low carbon alternatives such as heat pumps and biomass boilers.
Eligibility
Applicant types
Business
Business size
SME, Large
Industries
Residential and small to medium non-domestic buildings
Match funding
Needs verification
Requirements
Property owners of homes or small and medium non-domestic buildings MCS-certified installer applies on property owner's behalf; property must be a home or small/medium non-domestic building in England or Wales with a valid EPC (max 45 kWth, or 300 kWth shared ground loop). To incentivise adoption of low carbon heating and increase deployment of heat pumps
Eligible applicants
Property owners of homes or small and medium non-domestic buildings
Funding and scope
Benefit amount
Up to £7,500 (heat pumps); up to £5,000 (biomass boilers)
Total fund available
Not specified
Funding intensity
Not specified
Payment type
Reimbursement
Eligible scope
To incentivise adoption of low carbon heating and increase deployment of heat pumps
Eligible expenses
Not specified
Ineligible costs
- Replacement of existing low carbon heating systems
- installations funded by multiple public funding sources
Application and risks
Application platform
Installer-led application via Ofgem
Competitiveness
Competitive Selection
Decision timeline
Not specified
Assessment process
Ofgem issues voucher; installer redeems voucher after installation
Application sections
Not specified
Application components
- Installer submits application
- property owner provides consent
- installer applies for voucher
Timeline and partners
Opening date
23 May 2022
Project duration
Not specified
Project start
Not specified
Project end
Not specified
Co-funders
Not specified
Collaboration rules
- Installer applies to Ofgem for voucher; property owner must consent.
Consortium requirements
- Installer-led single application; not a consortium grant.
Additional guidance
[{"label":"Key Organisational Requirements","value":"Property must have a valid Energy Performance Certificate; must replace an existing fossil fuel or electric heating system; installation must not be funded by other public funds; installer must be MCS-certified"},{"label":"Funding Structure","value":"£7,500 for air source heat pumps; £7,500 for ground source heat pumps; £5,000 for biomass boilers"},{"label":"important notes","value":"Biomass boilers only eligible in rural, off-gas-grid properties; application must be made within 120 days of installation commissioning; grant is deducted from installation invoice"}]
Quick facts
- Status
- Open
- Deadline
- 30 Dec 2027
- Funding amount
- Up to £7,500 (heat pumps); up to £5,000 (biomass boilers)
- Funding band
- Micro (<£50k)
- Funding type
- Capital grant
- Payment type
- Reimbursement
- Audience
- Business
- Industry
- Residential and small to medium non-domestic buildings
- Last updated
- 9 Jun 2026
- Published
- Not specified