Due to different standardizations of various standards and regulations from different technical fields, we refer here to the standards that are relevant for us. Depending on the regulation or standard, other technical designations and abbreviations as well as indices are used. We have summarized an overview or a conclusion here.
The symbols, sizes and units for fans are described by various DIN EN ISO standards and other regulations, depending on the subarea. The nomenclature of this technical documentation is primarily based on DIN EN ISO 5801, which is supplemented by DIN EN ISO 3744 and DIN EN ISO 3746. These standards are explained in more detail in the following sections.
In some places, formula symbols are used which are not defined in these standards. If this is the case, these additional formula symbols are described explicitly at the respective position.