Key terms explained: Non-Domestic RHI

This means your installation meets the eligibility criteria and has been accepted on the RHI scheme, which is necessary to receive payments under the RHI.

This is a method of demonstrating compliance with emissions requirements and involves assessing the carbon emissions for fuel. The data used is the “typical value” for that fuel. DECC has created a carbon calculator to simplify this process.

This is a heat generating plant which uses a different technology or source of energy to an existing accredited RHI installation, but is still connected to the same heating system as the accredited RHI installation.

This is a plant which is commissioned after an RHI installation was first commissioned. It uses the same source of energy and technology as the original plant, and supplies heat to the same heating system.

The Air Quality requirements set obligations for plants accredited on or after 24 September 2013. Participants have to operate their plant in line with the manufacturer's instructions on emissions and in accordance with their RHI emissions certificate.

This refers to the small amounts of fossil fuel necessary for the effective operation of certain installations.

This is a declaration participants must provide to confirm that the accredited RHI installation/registered biomethane producer has met the eligibility criteria and ongoing obligations of the scheme for the previous 12 months.

Some participants will be required to provide annual sustainability audit reports to maintain compliance. These are biomass and biogas participants who are 'self-reporting' and have an installation of 1MWth and above. It also includes all biomethane participants. For more information, please see the Sustainability Audit Guidance.

Some applications may be rejected for various reasons.  We will always explain why an application has been rejected.

These are certification schemes that participants can use to ensure a fuel meets part or all of the RHI sustainability requirements. Currently the Biomass Suppliers List (BSL) is the only approved list.

This is the number given by an approved list such as the Biomass Suppliers List (BSL) to a participant, who must then provide us with the number to demonstrate compliance with the sustainability requirements. Participants must also keep their invoices and receipts which will include the BSL number.

This is a person who is authorised to open and use an account with the Ofgem RHI website or provide information by post, submit periodic data and complete the RHI annual declaration.