Pre-heating oven ECF 3N series with a new simple and functional electronic card which controls a three-stage cycle with temperatures, rising speed and standby times that may be preset by the operator according to his needs. LCD display. Possibility to preset the cooling phase. Timer for deferred ignition which may be set up to 99 hours and 59 minutes. Final temperature which may be preset up to 1100 °C. Heating system by muffle with resistances on the four sides. Set for the connection to an extractor equipped with intake fan (AS) controlled by card with two options: automatic ignition of the fan when the heating system starts with temperature programming for stopping the fan or manually fan drive with timer programming for the duration of the intake time. Safety microswitch that cuts off the power to the resistance in any phase of the heating cycle when the door opens. Upper part made of stainless steel. Input voltage 230 V ac 50/60 hz.