The invention refers to a method for tempering, such as cooling, of a number of packaged units of products (bags) by using a coolant in the form of a mixture of ice cubes and water, and characterised by the fact that an ice slurry of water and ice particles is applied, and that the mixture is circulated around the units in order to cool them. Preferably, injectors should be utilised to pump the slurry around and in between the bags. The invention also refers to a system and an application.
