They have been designed to obtain the best compromise between the heating speed and the operating life of both the resistances and the thermal insulation. The combination of preformed ceramic fiber panels, low density refractory bricks, and high quality resistances, allow these ovens a very rapid rise in temperature and cooling, thus having great advantages in working with intermittent ovens. It is built with a double-walled body with additional free air cooling to keep the external temperature low. The structure in fire-painted steel with epoxy paints, and support feet with rubber base, make the ovens of the LKN-VAC series compact, light and that can be placed on any laboratory table or bench. The heating part is made up of “molybdenum disilicide” resistors.