scope:

This international standard deals with the classification of fan power consumption and efficiency for many fan types. In addition, it details specific application, efficiency classification information. This document describes a number of different procedures to classify the efficiency of a fan (stand-alone fan or fan designed to be integrated/embedded into another product), power consumption compared to a reference model, or to apply a minimum efficiency limit (MEL). Those procedures are described in parts;- ISO 12759-3 ISO 12759-4 ISO 12759-5 ISO 12759-6 There is no method described to compare these classifications and MEL's. Direct comparison shall not be made between the classifications and MEL's described in parts 3, 4, 5 and 6. This document applies to the fans, not to the system in which they are installed.