The standard describes the state of the art of facilities and appliances for the combustion of wood and woodbased panels and in particular the emission control measures. The standard is referring to combustion systems with a rated thermal input from 1 MW to less than 50 MW. It applies only to fuels, which are free from wood preservatives and coating materials containing halogenated organic compounds and/or heavy metals. The wood assortment, which are allowed to be burned within the scope of this standard, covers untreated wood, industrial wood and/or used wood. As the emissions from the covered combustion systems are significantly influenced by the fuel quality, measures for ensuring a uniform fuel quality are also concerned.