NBN ISO 21684:2025

Fans — Laboratory test methods for air circulating fans (ISO 21684:2025)

ACTIVE

About this standard

Languages
English
Type
NBN
Standards committee
ISO/TC 117 (Fans)
Status
ACTIVE
Publication date
22 December 2025
ICS Code
23.120 (Ventilators. Fans. Air-conditioners)
Withdrawn Date
Price
€ 145,00

About this training

Summary

< p class=" MsoBodyText" > < span lang=" EN-GB" > This document specifies laboratory testing methods for electrically powered air circulating fan heads and ceiling fans when air is used as the test gas. < / span>


< p class=" MsoBodyText" > < span lang=" EN-GB" > 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.< / span>


< p class=" MsoBodyText" > < span lang=" EN-GB" > See annex A for information on common names used for various air circulating fans.< / span>


< p class=" MsoBodyText" > < span lang=" EN-GB" > This document does not apply to:< / span>


< p class=" ListContinue1" style=" mso-list: l0 level1 lfo1 " > < !-- [if !supportLists]--> < span lang=" EN-GB" style=" mso-fareast-font-family: Cambria mso-bidi-font-family: Cambria " > < span style=" mso-list: Ignore " > —< span style=" font: 7.0pt ' Times New Roman' " >     < / span> < / span> < / span> < !--[endif]--> < span lang=" EN-GB" > jet fans < / span>


< p class=" ListContinue1" style=" mso-list: l0 level1 lfo1 " > < !-- [if !supportLists]--> < span lang=" EN-GB" style=" mso-fareast-font-family: Cambria mso-bidi-font-family: Cambria " > < span style=" mso-list: Ignore " > —< span style=" font: 7.0pt ' Times New Roman' " >     < / span> < / span> < / span> < !--[endif]--> < span lang=" EN-GB" > powered roof ventilators, induced flow fans, laboratory exhausts < / span>


< p class=" ListContinue1" style=" mso-list: l0 level1 lfo1 " > < !-- [if !supportLists]--> < span lang=" EN-GB" style=" mso-fareast-font-family: Cambria mso-bidi-font-family: Cambria " > < span style=" mso-list: Ignore " > —< span style=" font: 7.0pt ' Times New Roman' " >     < / span> < / span> < / span> < !--[endif]--> < span lang=" EN-GB" > positive pressure ventilators as defined in ISO 24660:2024 < / span>


< p class=" ListContinue1" style=" mso-list: l0 level1 lfo1 " > < !-- [if !supportLists]--> < span lang=" EN-GB" style=" mso-fareast-font-family: Cambria mso-bidi-font-family: Cambria " > < span style=" mso-list: Ignore " > —< span style=" font: 7.0pt ' Times New Roman' " >     < / span> < / span> < / span> < !--[endif]--> < span lang=" EN-GB" > compressors < / span>


< p class=" ListContinue1" style=" mso-list: l0 level1 lfo1 " > < !-- [if !supportLists]--> < span lang=" EN-GB" style=" mso-fareast-font-family: Cambria mso-bidi-font-family: Cambria " > < span style=" mso-list: Ignore " > —< span style=" font: 7.0pt ' Times New Roman' " >     < / span> < / span> < / span> < !--[endif]--> < span lang=" EN-GB" > positive displacement machines.< / span>