A spiral-seam duct SPIRO of zinc-coated steel are applied as standard ducts for air distribution within ventilation installations and air condition systems. The duct can also convey other media, i.e. welding fumes or dust.
![Spiro01 przewody sztywne SPIRO i Kształtki wentylacyjne](https://klimawent.com.pl/wp-content/uploads/2018/10/spiro01.jpg)
A spiral-seam duct SPIRO of zinc-coated steel are applied as standard ducts for air distribution within ventilation installations and air condition systems. The duct can also convey other media, i.e. welding fumes or dust.