Insulated ventilation ducts with a thermal resistance up to 140°C. Designed for ventilation, air conditioning and recuperation installations. Proper stiffness and cross-section retention is ensured by the inner frame of the  spirally wound steel wire of increased strength. The ducts perfectly dampen noise and vibrations, reduce the need to use fittings.

Flow speed: max. 30m/sek.

Operating pressure: max. 5000Pa

Flammability class: hardly flammable

Insulation: 25 mm thick wool with a density of 12 kg/m³