lSO 17225-5:2026

Solid biofuels — Fuel specifications and classes Part 5: Graded firewood (Edition 3, 2026)

Abstract

This document specifies the fuel quality classes and specifications of graded firewood. This document applies only to firewood produced from the following raw materials (see ISO 17225-1:2021, Table 1):

1.1.1 Whole trees without roots;

1.1.3 Stemwood;

1.1.4 Logging residues (thick branches, tops, etc.);

1.2.1 Chemically untreated by-products

General information