Drying installations for bulbs Ventilation system for boxes. Example box for drying. One layer ventilation boxes in front of the drying wall. Boxes in front of ventilation system. Cross-cut of forced ventilation system (with air flows). Cross sections of boxes drying/storage. Ventilation system for drying and storage in boxes. Cross-cut of forced ventilation system (with air flows). Ventilation per box level individually. Ventilation system with slanted wall. Practical situation hatches; air mixing 50/50%. Air mixing unit with mix-hatches for inside/mix/outside air.