# The Renewable Heat Incentive Scheme Regulations 2018, Paragraph 3


All other woodfuel must meet—
(a) fuel quality standard EN 15234-1:2011, ISO 9001:2015 or ISO 17225-4:2021;
(b) a subsequent version of one of those standards; or
(c) an equivalent standard.

---
Source: https://www.legislation.gov.uk/uksi/2018/611/schedule/4A/paragraph/3 (the official version)
Page: https://openlegislation.uk/renewable-heat-incentive-scheme-regulations-2018/schedule-4A/paragraph-3
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.