ISO 17225-4:2021
Solid biofuels — Fuel specifications and classes — Part 4: Graded wood chips
Product Details
1.1 Forest, plantation and other virgin wood;
1.2 By-products and residues from wood processing industry;
1.3.1 Chemically untreated used wood.
This document covers only wood chips, which are produced with sharp tools, and does not cover hog fuel, which is produced with blunt tools.