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Animated depiction of an afterburner functioningAfterburners use a flame enclosed within a chamber. Combustion by-products include water vapor and carbon dioxide gas. They are commonly used to destroy volatile organic compounds. Heat tolerant refractory bricks line the chamber. Pollutant-laden gases are passed through the chamber and burned at temperatures between 1300 to 1500 degrees Fahrenheit. Because of rising fuel costs, heat recovery systems can use waste heat for useful purposes.