Abstract: A stove for burning corn (maize) including a heat exchanger having an input chamber in which corn is burned, and an output chamber where heat from the burning corn is absorbed in air, which is directed to a conventional grain drying machine for drying the grain therein. Unique arrangements are made for optimizing the quantity of air admitted to the input chamber for combustion, and for making the flow of combustion air uniform across the entire mass of burning corn. An auger is included for feeding corn to the input chamber either from a separate supply vessel, or, in cases where corn is the grain to be dried, from the grain dryer itself.