Abstract

This document establishes a system for the classification of fan efficiency for all fan types driven by motors with an electrical input power of 0,125 kW and above. It applies to driven fans only, but not to the system (finished original equipment manufacturer's product, for example box fans and roof fans or ventilation system) in which they might be installed. This document, as well as ISO 12759-3, ISO 12759-5 and ISO 12759-6, describe a number of different procedures to classify the efficiency of a fan or to apply a minimum efficiency limit (MEL). Appendix F shows how procedures described in this document can be used to set MELs. There is no method described to compare these classifications and MELs.This document (EN ISO 12759-4:2019) was prepared by Technical Committee ISO/TC 117 "Fans" in collaboration with Technical Committee CEN/TC 156 "Ventilation for buildings," whose secretariat is held by BSI. National interests in the development were represented by the working committee NA 060-09-11 AA "SpA to ISO/TC 117 and CEN/TC 156/WG 17" in the "General Air Technology" department of the DIN Standards Committee for Mechanical Engineering (NAM). Representatives of fan manufacturers and users, from research and educational institutions, and from testing institutes were involved in the development.

Begin

2025-06-30

WI

00156306

Planned document number

DIN EN ISO 12759-4/A1

Project number

06004576

Responsible national committee

NA 060-09-11 AA - Fans  

Responsible european committee

CEN/TC 156 - Ventilation for buildings  

Responsible international committee

ISO/TC 117/WG 11 - Energy efficiency classification