7.3m Hvls Outside Use Indsutrial Size Waterproof Ventilation Fans

7.3m Hvls Outside Use Indsutrial Size Waterproof Ventilation Fans. IE5 Permanent Magnet Motor: Self-developed external rotor motor with IMU configuration for high efficiency and energy saving. IP66 Waterproof Controller: Fully enclosed smart controller with dust-proof, waterproof, and moisture-proof protection. Aluminum-Magnesium Alloy Blades: High-strength aviation-grade alloy blades with T5+ oxidation treatment for corrosion resistance. Wide Voltage Compatibility: Supports 220-240V/380V-440V input with 50Hz/60Hz frequency for global adaptability. Low Noise Operation: Operates at less than 39dB, ensuring a quiet environment for commercial and public spaces. Large Coverage Area: 7.3m diameter model covers up to 1500 square meters with 13000 M3/M air volume. Multiple Safety Protections: Features overvoltage, undervoltage, overload, collision, overheating, and lightning protection. Stainless Steel Components: Sunshade, blade clamps, gaskets, and screws are made of stainless steel for durability.