Aeration apparatus for mounting within a hopper bottom of a grain storage bin

An aeration apparatus for a grain storage bin having a bin boundary partly defined by a hopper bottom wall tapering downwardly and radially inwardly to a central discharge gate and an air supply duct communicating through the bin boundary for receiving aeration air from an external blower, the aeration apparatus comprising:

• a duct member defining an upper boundary of an aeration duct extending along an annular path about a central opening and being at least partially open at a lower boundary of the aeration duct;
• and
• a plurality of leg members arranged to support the duct member within the storage bin at a location spaced above the hopper bottom wall such that the central opening is generally aligned with the central discharge gate of the storage bin and such that the aeration duct communicates with the air supply duct to distribute the aeration air from the external blower within the storage bin.