This document determines the fuel quality classes and specifications of graded firewood. This document covers only firewood produced from the following raw materials (see ISO?17725?1:2021, Table?1):
—?1.1.1 Whole trees without roots;
—?1.1.3 Stem wood;
—?1.1.4 Logging residues (thick branches, tops etc.);
—?1.2.1 Chemically untreated by-products and residues from wood processing industry.