The double-chamber design developed by Christ places the ice condenser directly below the drying chamber. There is a wide choice of sizes, with ice condenser capacities from 12 kg to more than 500 kg. The shelf area ranges from 1 m² (specifically for process optimisation) to over 40 m², depending on the system type.

The design developed by Christ places the ice condenser directly below the drying chamber. The large opening creates ideal flow conditions for water vapour.

Especially at the start of the drying process, undesirably large pressure differences between the drying chamber and the ice condenser chamber can occur if the opening is not large enough to handle the enormous quantities of water vapour released during drying. A large opening significantly increases the performance and cost-effectiveness of the system. Temperature-sensitive materials can be dried reliably with this design.