The basics of heat and mass exchange of technological equipment, as well as humans with the environment are outlined; selection of design outdoor air parameters; conditions of microclimate formation in the room; consideration of harmful substances entering the room and atmosphere from operating process equipment; aspiration and local exhaust ventilation systems; local supply ventilation systems; aeration of workshops; Air exchange definition and air distribution calculation ventilation networks and their calculation; ventilation equipment (fans, ejectors, heaters and filters); pneumatic conveying systems and cleaning equipment.