Key terms explained: Non-Domestic RHI

Self-reporting participants need to demonstrate that the balance of the wood fuel used in a reporting period meets a threshold of at least 70% from legal and sustainable sources with the remainder from legal sources, in line with the Timber Standard. The Mass Balance approach is a means of accounting for the flows of wood fuel material, and also enables material with differing percentages of legal and sustainable content to be mixed.

This refers to the volume of biomethane in cubic meters per quarterly period, biomethane producers are entitled to supply for injection under their Network Entry Agreement.

Participants must measure their heat output by metering the installation. For more information see the Easy Guide to Metering.

Certain installations of 45kWth or less need to be certified under the MCS, or an equivalent scheme. These include all heat pumps, solid biomass, and solar thermal.

An installation which uses multiple metering and therefore requires a combination of quantities (i.e. two or more) to be measured for RHI payment purposes.