The cooling process begins immediately after cooking is complete, automatically and without delay. This eliminates the possibility of contamination of the product with microorganisms from the ambient air. At the end of the cooking process, the frames with the products are transported by a hydraulic system to the cooling zone. Automatic doors hermetically separate the zones from each other, and the cooling process begins. Simultaneously with the cooling process, the product can be loaded into the vacant smoking and cooking zone and a new cycle can be started. Flexibility is a distinctive feature of these systems, as standard floor frames are used for operation and different types of products can be processed simultaneously.