This kind of fan used brushless DC motor without hall sensors, and the feedback signal is created by back EMF. They can be used in bus air conditioner, radiator and cooling system, etc.
1. Speed regulating wire: +5~+11VDC. 2. Air volume: 1900m3/h@100Pa, 2000m3/h@100Pa, 1700m3/h@100Pa. 3. Pull type, push type. 4. Paddle blades, curved blades and straight blades.