Duct airflow calculator
Aeration Fan Calculator
OSU Biosystems Engineering
Grain Bin Aeration Fan Calculator
This calculator estimates the power of an aeration fan for a grain storage bin. Calculations are based on ASABE Standard D272.3 Revision 2007. This calculator is provided as is and OSU assumes no responsibility for results obtained.
Help with this calculator

Enter the height of the grain in the bin:
Enter the bin diameter;

Enter aeration rate in CFM/bushel

Enter the static pressure in the duct system. 
 inches water

Fan efficiency
Grain packing factor

Calculated results:
Grain volume:
Airflow rate:
Time for air to go through grain bulk:
Static pressure across grain bulk:
Fan power estimate: