Ventilair. Sonodec TRD Non-Woven 25. Flexible air duct. Flexible aluminium silencer, thermally and acoustically insulated with a 25 mm glass wool layer. Suitable for ventilation systems and air conditioning systems. Ends taped to create ready-made connections. Material construction: non-woven fabric, glass wool and aluminium laminate. Inner hose: polypropylene. Glass wool blanket: 25 mm, 16kg/m3. Outer jacket: aluminium, polyester laminate. R-value glass wool: 0.65 m2K/W (ASTM C177-76). Temperature range: from - 30°C to + 140°C. Max. working pressure: +2500 Pa. Max. air velocity: 25 m/s. Bend radius 0,54 x D + 25 mm. Antibacterial. Length: 0,5 m or 1 m. Qualified according to the specifications of: NEN 13180.