Abstract: Grain bin ducting systems are disclosed that more evenly disperse air through a grain bin while also preventing moisture from building up on the top and sides of a grain bin, which can lead to undesirable moisture levels for parts of the grain bin or even ruin grain. Airflow resistance may be reduced in a grain bin by having the air travel in a horizontal direction through the grain bin instead of a vertical direction. Normally, the radius of the grain bin is substantially less than the height of the grain bin, so the resistance to airflow is substantially lower than in typical grain bin ducting systems.

Abstract: Potentially off-grid grain conditioners that can be operably connected to an aeration grain bin or silo to blow heated air through the crop to dry the crop or to blow ambient temperature air through the crop to cool it are disclosed. A fan is powered by a motor that may be mounted inside the air stream to allow the heat from the motor to be collected and forced into the airstream that is blown into the grain bin. The engine exhaust may be routed through an air exchanger to remove heat from the exhaust and direct heat into the grain bin, or the exhaust may be put into the atmosphere without capturing any of the heat, which allows the fan to operate in a cooling mode. The motor may be mounted inline or mounted to the side for a centrifugal aeration fan.