Burn-out furnaces suitable for baking any investment, including quick and sophisticated investments requiring lots of stand-by periods, or investments which harden at high temperature but require injection to be carried out at lower temperature. Electronic control of the heating process can be very complex, requiring controlled raise and drop stages. 2 distinct working stages: one for quick investments, featuring one threshold only and a fast rise in temperature; and a second for traditional investments, providing for in-between steps and controlled times. Possibility to replicate the cycle with quick investments. Set-up time corresponds to the actual time and will automatically start as the lid is closed after the casting rings have been put inside. Wide display showing all data of the cycle. Automatic cycle restart after a voltage drop. Start-up program delay of up to 100 hours.