​​The structure consists of a steel frame, the interior of the furnace is lined with plates from of fibrous insulating material at 1000ºC and fitted with heating elements FIBROTHAL. The cooling system consists of a system of channels in the bottom of the furnace and openings in the ceiling that are opened by flaps. Air access to the bottom the furnace is free or forced by a fan. There are flaps and a fan controlled by the program from the temperature controller. So it can be programmed ascending and descending temperature curve. This method of cooling is verified in dozens of rapid heating furnaces. The control and power part is electric located in a separate switchboard.