Abstract: A vacuum kiln apparatus and method of using same are disclosed for use in drying corn, other grains, seeds and legumes. The vacuum kiln apparatus can include a support base, a wall, a vacuum pump system, a pressure valve, a top hatch, a machinery access hatch, an anti-overload baffle, a conveyor system, a motor, a chamber vent valve, an air outlet manifold and an air compressor. The wall defines an internal chamber for receiving the grain. The vacuum pump system is used to draw down the pressure within the internal chamber which drives moisture out of the corn while maintaining the integrity of the corn, i.e., drying the corn with little or no cracking. The air outlet manifold along with the air compressor are used to flush high pressure air through the piles of corn to strips off any residual water that may be clinging onto the exterior of the corn grains.