Abstract: An improved method for batch drying grain and the like utilizes a plurality of separate batch bins having hot, drying air inlets, transfer air outlets and inlets, and return air outlets. The hot, drying air inlets are connected by a common duct as are the transfer air outlets and inlets. The return air outlets are also connected with a common duct or ducts. The common return duct or ducts connect the outlets to a fan chamber. Air in the fan chamber is dehydrated and heated by a heat pump before being directed into the common hot, drying air supply duct. Air is circulated among the batch bins by arranging various combinations and permutations of supply, transfer and return inlet and outlet openings before it is recycled through the fan chamber and heat pump coils.