ISO 17225-5:2021
Solid biofuels — Fuel specifications and classes — Part 5: Graded firewood
Product Details
— 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.