- 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. Then it is sucked out by the ducts above the carts.
The amount of air from the left and right side changes smoothly from minimum to maximum in both phases. DAF 1 is suitable for chambers especially for KMD chambers up to 6 carriages.