Measuring and Estimating Airflow Rates From Fans

Airflow resistance in a grain bin is an important measure as it dictates how much airflow (cfm or cubic feet of air per minute) your fan is pushing into the grain.

This handout describes two methods for using airflow resistance to know or predict airflow rate.

Click here to open the“Measuring and estimating airflow rates from fans” handout.

Note: This handout should be used in conjunction with manufacturer information. (i.e. “Grain Guard Fan Guide” and the video titled “Selecting Fans for Grain Conditioning and Natural Air Drying.”