Thermal Efficiency: Insulated with 25mm thickness, our ventilation duct boasts a thermal resistance up to 140°C, making it ideal for heating, cooling, and air conditioning applications. Noise Reduction: The spirally wound steel wire inner frame effectively dampens noise and vibrations, offering a quiet and comfortable environment in your ventilation and air conditioning systems. Versatile Applications: Tailored for ventilation, air conditioning, and recuperation installations, this flexible duct hose is a versatile solution for various HVAC systems. Temperature Resilience: With resistance to both low and high temperatures, this duct hose is built to withstand extreme conditions while maintaining optimal performance. Moisture protection further ensures longevity. Temperature Resilience: With resistance to both low and high temperatures, this duct hose is built to withstand extreme conditions while maintaining optimal performance. Moisture protection further ensures longevity. Stability and Cross-Section Retention: The inner frame's strong spiral spring provides the necessary rigidity, ensuring stable performance and preservation of the duct's cross-section. This design minimizes the need for additional fittings, making installation easier and more cost-effective. The ducts come equipped with "weep holes" or "weeping perforations," designed to facilitate drainage of condensation and moisture, preventing potential issues such as corrosion. This feature enhances the ducts' durability and longevity., Manufacturer: CRW