1. Dual purpose system - Aeration ducts and Bin unloading after grain has ceased to flow by gravity.

2. For use in bins with center, side or multiple outlet discharge points.

3. Design consists of rectangular steel ducts with a top galvanized perforated deck plate with specially designed openings to allow the grain to flow.

4. Ridges of solid concrete or other acceptable material are cast between the kanal troughing (air ducts) at the angle required for the grain to flow onto the kanals and be conveyed to the bin discharge point by air from aeration fan.

5. Ductwork from the aeration fan is attached to the inlet end of the kanal trough to supply it with air.

6. Several different patterns of kanal layout are used depending on the layout or application designed.

7. Can also be used for aeration and unloading of flat storage buildings.

8. Can be designed for an unlimited bin diameter.