Key Components Refractory lining: This heat-resistant material lines the interior of the furnace to withstand the extreme temperatures. Gas burners: These devices supply the gas and ignite it to create the necessary heat. Combustion chamber: This is where the body is placed for cremation. Exhaust system: This system removes the gases produced during the cremation process. Air filtration system: This helps to clean the air before it's released into the environment.