AS/NZS ISO 12759.5:2023 identically adopts ISO 12759 5:2021, which establishes a classification of fan efficiency for all jet fan types driven by motors with an electrical input power range from 5.5 kW to 155 kW (and this is likely to be in the size range 500 mm to 1600 mm diameter with motors rated between 5.5 kW and 150 kW from IEC 60034 30 1)