Spiral duct (round duct) by VSP.

The spiral duct is the core element of round ventilation systems, used to convey air in supply and exhaust systems. It is manufactured from galvanised steel strip by spiral winding, so the spiral seam gives the duct high rigidity, strength and stable geometry.

The round cross-section ensures low airflow resistance and highly airtight connections, while the smooth inner surface reduces noise and pressure loss. The duct connects easily to fittings — bends, reducers and tees — allowing systems of any configuration to be assembled. Available in diameters from 100 to 1600 mm.

The spiral duct is suitable for supply and exhaust ventilation systems in residential, commercial and industrial buildings.