Sterilizing laboratory glassware and containers is a challenging task, but necessary for many analytical processes and measuring methods. Usually, the glass containers are cleaned thoroughly with mechanical and chemical methods. As one of the last steps, the glassware is often heated to 400 °C - 600 °C for several hours to remove traces of organic material and residual deposits. Chamber furnaces with brick insulation (models N ../G) and forced convection furnaces are particularly suitable for such processes. By using additional equipment, such as a charging trolley with shelves, glass components can be positioned conveniently in several levels.