This clause of IEC 60704-1:2021 is applicable except as follows: Replacement: This part of IEC 60704 applies to electric hand-held hairdryers for household and similar use supplied from mains, which operate with a flow of air. These particular requirements can also be applied to analogous electrically operated devices such as hairstyling appliances, which produce the airflow by a fan. Helmet-type hairdryers are excluded from this standard. This standard does not apply to hair care appliances with radiant heating For determining and verifying noise emission values declared in product specifications, see IEC 60704-3:2019.