Spiral ducts are produced by automated forming machines from galvanized steel (0.5–1.2 mm) or stainless steel. Diameters are available from Ø80 mm to Ø1600 mm. Fittings are pressed or welded, with flange or quick-connector joints. The system meets DW144 and EN 12237 Class D sealing requirements.
The ducts are rigid, lightweight, and offer quick installation with reduced labor cost. Ideal for large HVAC systems in commercial and industrial facilities.