The article describes refrigerated transport trucks based on the Agreement on the International Carriage of Perishable Foodstuffs and on the Means of Transport Used for Such Carriage (ATP). A simple methods for choosing the refrigeration unit were discussed, stating that using for this purpose tables containing only the ranges of transport temperature and size of the trailers can lead to errors. The components of heat losses balance of refrigerated trailers are presented. It was found that the heat loss through the insulation body depends primarily on the temperature difference between the air outside of the body wall and the air inside the cargo space and on the quality of the insulation. The effect of solar radiation and fruits and vegetables respiration heat as well as the impact of door opening time during unloading of the transported goods on the heat transfer were discussed. Article completed a summary with analysis of errors possible to commit when creating the heat balance of refrigerated trailers.

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