90.92 Standard to be revised Apr 30, 2025
ISO
ISO/TC 117 Fans
International Standard
23.120 Ventilators. Fans. Air-conditioners
Published
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.
PUBLISHED
ISO 12759-2:2019
90.92
Standard to be revised
Apr 30, 2025
IN_DEVELOPMENT
ISO/AWI 12759-2
