Emission Certificate (RHI)

Below is a full list of the information that should be found on an RHI Emission Certificate. This information is used to indicate the amount of pollutants likely to be emitted by a biomass product when burning specific fuel types.

  • The name and address of the testing laboratory
  • The name and signature of the person authorised by the testing laboratory to issue the certificate
  • The issue date of the certificate and the certificate reference number
  • The date of the laboratory’s accreditation to EN ISO/IEC 17025:2005 and their accreditation number
  • The name, model, manufacturer and installation capacity of the plant
  • The testing date
  • Confirmation that oxides of nitrogen (NOx) and particulate matter (PM) have been tested on the same occasion and in accordance with the relevant EN standards, and, that the test was carried out at no less than 85% of the installation capacity of the plant. The requirements for testing of PM and NOx are:
  1. that testing is carried out in accordance with the provisions relevant to emissions of PM and NOx specified in whichever of the following standards applies: EN 303-5:1999; or, EN 303-5:2012
  2. that testing is carried out in accordance with EN 14792:2005 for NOx and EN 13284-1: 2002 or BS ISO 9096: 2003 for PM.
  3. that the emissions of PM represent the average of at least three measurements of PM emissions, and for at least 30 minutes duration.
  4. that the value for NOx emissions is derived from the average of measurements made throughout the PM testing process.
  • Confirmation that emissions of PM did not exceed 30 grams of PM per gigajoule net heat input (the rate of heat which is supplied to the plant by the fuel used, and based on the net calorific value of that fuel), and NOx did not exceed 150 grams per gigajoule net heat input.
  • The actual emissions of PM and NOx measured when the plant was tested.
  • A list of the types of fuel used during the testing and the types of fuel which can be used so as not to exceed the emission limits.
  • The moisture content of the fuel used during testing and the maximum moisture content which can be used so as not to exceed the emission limits.
  • A statement indicating whether the plant was a manually stoked natural draught plant.
  • A list of any other plants in the type-testing range of plants for the certificate, if any.

If the RHI emission certificate template submitted with the application does not contain the right information, for example, if there is information missing, or the levels of PM and/or NOx are not within the limits laid out above, it will not be considered a valid RHI emission certificate. 
The English language versions of the BS or EN standards referenced above can be found on the British Standards Institute (IBSN) website.