Rectangular ducts are manufactured from the highest quality thermoplastics. Properly selected type of sheet (extruded, pressed or foamed), material thickness or welding method (hot air, welding, extrusion welding) allow to meet the various installation expectations.
Different welding parameters are used for different materials. Ventilation ducts and fittings are made according to DIN 4740 and DIN 4741 and Alnor factory standards.
For more information on types of plastics and their feature please refer to our technical catalogue.