British Standards Institution

Source:: ISO
Committee:: MCE/17 - Fans
Categories:: Information management | Standardization. General rules | Engineering | Fluid systems and components | Ventilators. Fans. Air-conditioners

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 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.

Purpose

This document differs from others in this series in that the fan is not evaluated at its peak efficiency value. Rather, the fan is evaluated at every duty point within its stated performance range. In doing so, this document addresses both the design and the proper selection of fans for reduced power consumption.

The fan energy index provides a consistent basis to compare fan energy performance across fan types and sizes at a given fan duty point. This document can be used by fan specifiers to communicate fan efficiency design intent and by those selecting fans to compare the energy use of various fan options. With improvements in technology and manufa

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Please email further comments to: debbie.stead@bsigroup.com

Standard timeline

1. Proposal

Proposal start date:

28/05/2021

Proposal end date:

16/07/2021

2. Draft

3. Public Comments

4. Comment Resolution

5. Approval

6. Publication

Learn more about the standards development process

Standards Development

ISO/NP 12759-6 - Fans — Efficiency classification for fans — Part 6: Calculation of the fan energy index

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