This clause of part 1 is applicable except as follows: 1.1 Scope 1.1.1 General Replacement: This standard applies to electric fan heaters, designed for placing on the floor, table or counter, etc., or for wall-mounting. This standard does not apply to: - Electric storage room heaters; - Room humidifiers; - Room dehumidifiers; - Air cleaners; - Heaters designed exclusively for industrial purposes. 1.1.2 Types of noise Replacement: ISO 3743-1, ISO 3743-2 and ISO 3744 can be used for measuring noise emitted by fan heaters. 1.1.3 Size of the source Replacement: The method specified in ISO 3744 is applicable to noise sources of any size. When applying ISO 3743-1 and ISO 3743-2, care should be taken that the maximum size of the appliance under test fulfils the requirements specified in clause 1.3 of ISO 3743-1 and ISO 3743-2.