Introduction, history, practise and importance, External and internal climate conditions. Room climate. Selection of internal designing conditions, Comfort conditions for the people; Meteorological and climatic parameters; Cooling load; Calculation of the heat losses and gains; The basic processes of air treatment; The thermal calculation of the process air preparation for winter and summer mode air-conditioning; Classification of the system, Air conditioning plants and air conditioning equipment, Calculation and selection of equipment air conditioning installations; Determination of airflow for air conditioning; Air chamber and its elements; Air conditioning installation and air conditioning equipment; The combination with systems for ventilation; Local air conditioners; Compact devices and split-systems; Modern systems for air-conditioning; Air conditioning system control; Energy efficient supply facilities; Energy consumption in air-conditioning systems;