GSO ISO 12759-6:2025
ISO 12759-6:2024
Gulf Standard
Current Edition
·
Approved on
14 October 2025
Fans — Efficiency classification for fans — Part 6: Calculation of the fan energy index
GSO ISO 12759-6:2025 Files
English
40 Pages
Current Edition
Reference Language
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GSO ISO 12759-6:2025 Scope
This document defines the calculation method for determining the fan energy index (FEI), which is an energy efficiency metric for fan duty points. This metric provides a standardized and consistent basis to compare fan energy performance across fan types and sizes at a given fan duty point.
This document is applicable to fans driven by electric motors and fans without drives. It is not applicable to circulating fans or air curtains.
The fan energy index can only be calculated for fan duty points above a minimum air power of 125 W (where air power is the product of volume flow rate and fan static pressure) or above a minimum volume flow rate of 2,0 m3/s.
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