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Number 5.5 and Annex 2 of TA Luft specify calculation methods for determining stack heights and for dispersion calculations. The calculation programs BESTAL (Besmin, Besmax) and AUSTAL are exemplary implementations of these specifications. They are provided free of charge by the Federal Environment Agency. read more

This page provides a list of problems that have been discovered. They are grouped into known and resolved issues. read more

This page provides the download of current program versions as well as sample calculations, test calculations and application packages for AUSTAL and BESTAL (Besmin, Besmax). The file format and the date of the file are shown in brackets. read more

This page contains a data base with deprecated program versions and update information as well as a documentation of program changes. read more

From the questions that have been received, the most important were selected and listed on this page along with a reply. The questions are grouped into general questions (A) and specific issues (S). read more