4-inch three-layer air duct (2 meters to 5 meters)

The triple-layer air duct is designed for exhaust fans to provide the highest levels of efficiency and durability in modern ventilation systems. The product combines excellent insulation, high resistance to environmental factors, and stable long-term performance, making it the ideal choice for residential, commercial, and industrial applications that require reliable quality. Compatible products: exhaust fan. Features: triple-layer design ensures high-efficiency thermal and sound insulation. Reduces noise and vibrations caused by exhaust fans. Resistant to moisture and heat to withstand various operating conditions. Improves airflow efficiency and reduces loss. Long operational lifespan with performance stability. Easy installation and maintenance compared to traditional solutions. Technical specifications: number of layers: 3 high-quality layers. Duct length: 2 meters - 5 meters. Diameter: 4 inches. Product material: PVC + single-sided aluminum foil. Product color: black. Air temperature tolerance: −30 °C ~ +85 °C. Inner layer: smooth surface to improve airflow. Middle layer: thermal and sound insulation material. Outer layer: moisture and environmental resistant. Compatibility: suitable for most standard exhaust fans. Usage: indoor and outdoor ventilation systems. Quality: manufactured to high standards for long-term use. Recommended applications: bathrooms and kitchens, warehouses and factories, offices and commercial buildings, service rooms and ventilation, modern residential projects.