For many years, energy efficiency has been the number-one topic with manufacturers and users of vacuum furnaces for thermal treatment. The search for energy-saving possibilities concentrated mainly on the furnaces themselves and the optimization of the heat-treatment processes.
Furnace designs and operating conditions were established and optimized long ago. Measures for heat recovery and other concepts to reduce energy consumption were clearly gained. With the new digital age upon us, however, further investigation into energy-savings possibilities should again be explored.