ISO 21684:2025
ISO 21684:2025 Fans — Laboratory test methods for air circulating fans
CDN $296.00
This publication was last reviewed and confirmed in 2025.
Fans — Laboratory test methods for air circulating fans
Description
This document specifies laboratory testing methods for electrically powered air circulating fan heads and ceiling fans when air is used as the test gas.
This document is applicable to air circulating fans with an input power greater than or equal to 125 W, except for ceiling fans that are larger than 1 800 mm, which do not have a lower input power limit. The diameter of the fan being tested is limited by the minimum dimensions as shown in the applicable test figures.
See annex A for information on common names used for various air circulating fans.
This document does not apply to:
— jet fans;
— powered roof ventilators, induced flow fans, laboratory exhausts;
— positive pressure ventilators as defined in ISO 24660:2024;
— compressors;
— positive displacement machines.
Edition
1
Published Date
2026-06-19
Status
PUBLISHED
Pages
28
Language
English
Format
Secure PDF
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Abstract
This document specifies laboratory testing methods for electrically powered air circulating fan heads and ceiling fans when air is used as the test gas.
This document is applicable to air circulating fans with an input power greater than or equal to 125 W, except for ceiling fans that are larger than 1 800 mm, which do not have a lower input power limit. The diameter of the fan being tested is limited by the minimum dimensions as shown in the applicable test figures.
See annex A for information on common names used for various air circulating fans.
This document does not apply to:
— jet fans;
— powered roof ventilators, induced flow fans, laboratory exhausts;
— positive pressure ventilators as defined in ISO 24660:2024;
— compressors;
— positive displacement machines.
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