This academic work talk about air-conditioning system, or on obtaining the conditions needed for a comfortable life for a man on the ship. Air conditioning includes heating, cooling, dehumidification, ventilation and purification of air and can be described humidity control, temperature and air flow. Test in accordance with this, the first part deals with the system of air conditioning and ventilation. Shows the scheme of air conditioning and ventilation described Marine accomodations which is divided into natural and artificial ventilation. This section also touches upon cooling with the attached diagram of the cycle of cooling. In the central part of the work defines the thermal load and the microclimate of accomodations. This builds on the humidification and dehumidification. The last part of the article talks about the air distribution systems. It talks about the fans, and they are axial and centrifugal. Axial is divided into vane axial and tube axial fans.