ISO 12759-4:2019/DAmd 1

Fans — Efficiency classification for fans — Part 4: Driven fans at maximum operating speed — Amendment 1: Addition of Annex F providing an example of the use of efficiency classification and editorial changes

General information

Current stage: 40.20 Effective date: Feb 16, 2026

Originator: ISO

Owner: ISO/TC 117

Type: International Standard

ICS: 23.120

Life cycle

PREVIOUSLY

PUBLISHED
ISO 12759-4:2019

NOW

IN_DEVELOPMENT
ISO 12759-4:2019/DAmd 1
40.20 DIS ballot initiated: 12 weeks
Feb 16, 2026

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