The tutorial provides information about the properties of moist air and flue gas and process changes its state. We present some information about the properties of wood (moisture content, hygroscopicity and shrinkage). The main events taking place in the drying process. We describe the processing methods, equipment, construction equipment for drying wood (lumber, veneer, chopped wood, fibreboard). The principles of control and adjustment modes of drying wood. Given basic information on occupational health and safety.