Currently, the most common way of air supply is carried out above floor with help of the so called semicircular ducts. This ventilation system is the most cost-effective variant. Because of a complete delivery spectrum of semicircular ducts, made of galvanized and perforated steel, the complete erection of an effective ventilation system is possible.

The perforations are available in versions K30 – K50 for grain and rapeseed and in versions K30 – K160 for potatoes. Various accessories are available on request.


  • cost-effective solution for professional ventilation
  • easy to install
  • many attachement parts for many stock types
  • also a version for grains, rapeseed, potatoes and wood chips is available