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Air ducts

The semi circular air ducts are suitable for the ventilation of agricultural products, such as potatoes, onions, carrots and tuberous products.

The semi circular air ducts are made of high quality galvanized sheet steel, which assure a long service life. The air ducts are being manufactured by Tolsma for over 30 years.

Duct length up to 30 metres

TT ventilation ducts are assembled from thirteen different models. This enables total lengths up to 30 metres to be constructed. The AC or EC fans can be placed directly in front of the ventilation canal.

The advantages of the Tolsma-Grisnich semi circular air ducts:

  • Excellent air distribution
  • Product-friendly
  • Easy to install
  • Guaranteed long life


Download the leaflet


Download the leaflet (USA)

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