High Quality Ywf-350 Extractor Axial Exhaust Fan 350mm Duct Fan Low Noise Cigarette Smoke Exhaust Fans

High Quality Ywf-350 Extractor Axial Exhaust Fan 350mm Duct Fan Low Noise Cigarette Smoke Exhaust Fans. External Rotor Design: Integrates motor rotor into impeller for space-saving, thin profile, and superior heat dissipation. Low Noise Operation: Dual-plane dynamic balancing (G6.3) minimizes vibration and operational noise. Maintenance-Free Bearings: Equipped with sealed ball bearings and IP44/IP54 protection for harsh environments. Versatile Blade Materials: Available in cold-rolled steel, die-cast aluminum, or reinforced plastic for anti-corrosion needs. Smart Speed Control: Supports 100% stepless speed regulation via voltage control or EC frequency conversion. Wide Voltage Range: Operates on 220V/380V with 50Hz/60Hz frequency compatibility. High Starting Torque: External rotor structure ensures smooth startups for frequent on/off cycles. Comprehensive Certifications: Passed RoHS, UR, ISO, CE, and CCC certifications for global compliance.