ČSN EN ISO 17225-1

This document determines the fuel quality classes and specifications for solid biofuels of raw and processed materials originating from
a) forestry and arboriculture;
b) agriculture and horticulture;
c) aquaculture.
Chemically treated material may not include halogenated organic compounds or heavy metals at levels higher than those in typical virgin material values or higher than typical values of the country of origin.