Thermal efficiency is another critical factor. In many operations, up to 50% of energy can be lost if the furnace is poorly designed or maintained. Features like regenerative burners, well-insulated linings, and advanced heat recovery systems help to reduce heat loss and improve efficiency. Modern furnaces often incorporate sophisticated control systems that monitor and adjust burner settings, airflow, and melting rates in real-time. These innovations not only improve fuel efficiency but also help to maintain consistent metal quality.