'Zisterne 2003' is a program for determining the optimal size of your rainwater storage, providing the following features:



an assistent helps you to gather all needed information
expert mode for rapidly entering the required data
geographical support for measuring the average rainfall at your location. (not in demo)
detailed help (only in german)
in-depth background information about planning your rain water utilization system
printing a report with recommendations (not in demo)
fill level simulation (monte carlo) of a calculated rainwater storage to determine its optimal size

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