To control the temperature and humidity of the grain stored in the silos, aeration system is necessary. In these silos centrifugal fans are used to distribute the air inside.
Flat bottom silos foundation must have air channels so that the air created by the fans be able to enter through these channels and then get transferred to the silo.
Required number of fans, fan exhaust, air flow rate and pressure is based on the capacity, height and type of grain to be stored in the silo.