- Vertical phase – the air enters the chamber through the vertically positioned nozzles, passes through the product trolleys and is sucked out through the ducts located above the trolleys.
- Horizontal phase – the air enters the chamber through the top nozzles and enters the product trolleys from above. It is then sucked out through lower channels located in the bottom of the chamber along the walls.
The amount of air from the left and right side changes smoothly from minimum to maximum in both phases. DAF 2 system is suitable for chambers especially for KMZ or KMU chambers up to 4 carriages and KMD for up to 6 carriages. It is very suitable for products with greater dehumidification and for trucks over 2m.