Wall-mounted exhaust fan with high-quality metal body and blade design for stable operation, large air volume, and low noise. Durable, corrosion-resistant shell that is sturdy and resistant to oxidation. Equipped with a pure copper motor featuring a sealed copper winding for fast speed, low noise, stable performance, and reliable power to drive the fan blades efficiently. Key parameters: - Voltage: 220V - Speed: 2800 RPM - Motor power: 20W (4 inch model) - Airflow: 140 m³/h (4 inch model) Features dust-proof design with grille and powder-coated steel wire guard to prevent debris from entering and damaging the blades. Suitable for ventilation and heat dissipation in supermarkets, shopping malls, production workshops, industrial facilities, and warehouses. Packing list: 1 x Ventilating Extractor Fan