Data collected on corn drying bins employing unheated air and bins utilizing electric heat for small air temperature rises indicate better energy efficiency when the energy is used to provide more air as compared to using a portion of the energy to increase the temperature of a smaller quantity of air. Unheated air drying of shelled corn was accomplished with an average of about 6.0 kWh per metric ton per percentage point of moisture removed as compared to an average of about 12.0 kWh/t- % when electric heaters were used to increase the air temperature. Final corn moisture content was approximately the same for both methods since the unheated air drying systems, with more air per unit of grain, completed drying earlier. Early fall weather, as contrasted to late fall, is generally more favorable to drying and the existence of lower average daily relative humidities permit the drying of corn to 15% or less, wet basis, without the addition of heat.