The furnace shell are cylindrical. Furnace shell made of welded steel plate with Pu. Refractories fired by the studio as a whole furnace, the furnace had to wear silk tank, heating element placed in the tank to wear silk. Between the furnace and the furnace shell foam blocks with fans, such as vermiculite insulation. 
 The furnace is equipped with temperature control, and thermocouple connection can be measured furnace temperature.