Domestic RHI Annual Report 2021-2022

Reports, plans and updates

Publication date

Scheme name

Domestic RHI

This is the annual report for the Domestic Renewable Heat Incentive Scheme (DRHI). It covers activity on the scheme over the 2021-22 financial year, including statistics on accreditations, payments made, a summary of our audit and compliance programme and changes to the scheme regulations. 


  • 24,489 applications were granted accreditation in 2021-22, bringing the total number of accreditations to 110,265.
  • Air Source Heat Pumps (ASHP) accounted for the majority (85.2%) of accreditations in 2021-22 and 67.5% of accreditations throughout the scheme’s lifetime.
  • Amongst the heating systems replaced by DRHI installations since the start of the scheme, 55,702 were fossil fuel powered boiler systems and 20,190 storage heaters. Additionally, 20,703 systems were installed in custom builds where no heating system was being replaced.
  • To date the scheme has subsidised a total of 7,038 GWh of renewable heat demand by accredited installations. We estimate that by the time the scheme ends, accredited installations will have produced carbon savings in the region of 6.65 Mt CO2.
  • A total of £145.7 million in payments were made to scheme participants throughout 2021-22. This brings the total payments made since the start of the scheme to £819.3 million.
  • As well as providing assurance on the payments we make, our audit work during 2021-22 resulted in the protection of over £1 million in public funds.

Please note: For those wishing to look at the data used in the report in more detail, a spreadsheet with this information is published below.

Additional information

For further information regarding the Non-Domestic Renewable Heat Incentive Scheme, visit the DRHI section of the Ofgem website.