Abstract: A system for disposing of materials such as vehicular tires and similar substantially organic matter and generating useful heat therefrom includes a first chamber, referred to as a gassification chamber, capable of holding a plurality of tires. The gassification chamber has an access way allowing for insertion of whole tires therein where they will be burned at a relatively low temperature resulting in incomplete combustion and the generation of combustible gases. A first air inlet is positioned substantially at the bottom of the gassification chamber with a first blower connected thereto. A gas outlet is positioned a first distance above the bottom of the gassification chamber confining the burning to the lower end of the gassification chamber. The combustible gas is removed and is conveyed to the lower end of a second chamber, referred to as a combustion chamber.