400 450mm Backward Centrifugal Fan Aluminum Wheel and Impeller

400 450mm Backward Centrifugal Fan Aluminum Wheel and Impeller. Aluminum Construction: Fan and impeller made of aluminum and aluminum-magnesium alloy for durability. CE Certification: Product has passed EU CE certification ensuring safety and quality standards. IP44 Protection: Type of protection is IP44, offering solid dust and water splash resistance. Long Service Life: Fans can last 3 to 5 years normally, with some units operating for 8 to 10 years. Low Noise Operation: Designed for very quiet noise levels ranging from 68 to 79 dB(a). Full Customization: Supports full customization, minor customization, and customization from designs. 1-Year Warranty: Includes a one-year warranty covering free replacement and return freight for defects.