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315mm Air Purifier Strong Exhaust Fan Blower Centrifugal Fan. Customizable Wire Length: Standard 500mm or fully customized length based on requirements. Multi-Speed Control: Offers 1-2-3 speed options for flexible operation. Wide Voltage Support: Compatible with 115V and 230V power supplies. Comprehensive Certifications: Certified by RoHS, UR, ISO, CE, and CCC standards. Advanced Protection Functions: Protects against over-temperature, locked-rotor, and voltage issues with auto-restart. Durable Aluminum Impeller: Constructed with high-strength aluminum alloy for longevity. Maintenance-Free Bearings: Equipped with maintenance-free ball bearing systems. Flexible Control Methods: Supports 0-10V, PWM, 4-20mA, and MODBUS protocols.