FprEN ISO 12759-2

Fans - Efficiency classification for fans - Part 2: Standard losses for drive components (ISO/FDIS 12759-2:2018)

General information

50.98 Project deleted   Feb 24, 2021


CEN/TC 156 Ventilation for buildings

European Norm

23.120   Ventilators. Fans. Air-conditioners


This document establishes a classification for fan efficiency. It applies to all electric-motor-driven fan systems that utilize a specific combination of components as defined below:
a) fan airflow performance determined in accordance with an accepted performance standard;
b) polyphase induction motors with nominal motor efficiency specified in this document;
NOTE 1 Other types of motors are explicitly excluded.
c) pulse-width modulated variable frequency drives (VFDs) for use with single motors;
NOTE 2 Single VFDs that service multiple, parallel fan motors are excluded.
d) mechanical power transmissions that utilize V-belts, flat belts, cog belts or couplings.

Life cycle


FprEN ISO 12759-2
50.98 Project deleted
Feb 24, 2021