1 High-Efficiency Noise Reduction: Achieves 15~32dB sound attenuation, perfectly balancing ventilation efficiency and noise insulation to meet stringent acoustic standards. 2 Premium Durable Materials: Constructed from high-quality aluminum, galvanized steel or SS304, offering excellent waterproof and anti-corrosion properties for long-term outdoor service life. 3 Wide Application: Ideal for generator rooms, data centers, HVAC systems and various industrial ventilation openings. 4 Customized Service: Tailored solutions for size, depth and color are available based on your project drawings and specific requirements. 5 Professional Technical Support: Free CAD design services and detailed installation guidance are provided to ensure seamless integration with your systems.