This standard BS EN ISO 21654:2021 Solid recovered fuels. Determination of calorific value is classified in these ICS categories:
75.160.40 Biofuels
75.160.10 Solid fuels
This document specifies a method for the determination of gross calorific value of solid recovered fuels at constant volume and at the reference temperature 25 °C in a combustion vessel calorimeter calibrated by combustion of certified benzoic acid.