The primary chamber contains the body – one at a time usually contained in some type of combustible casket or container. This chamber has at least one burner to provide the heat which vaporizes the water content of the body and aids in combustion of the organic portion. A large door exists to load the body container. Temperature in the primary chamber is typically between . Higher temperatures speed cremation but consume more energy, generate more nitric oxide, and accelerate of the furnace's refractory lining.