The furnace is very solidly built. It has an outline of steel sheet electrically welded on the outside and a stainless steel AISI sheet on the inside, thus forming a double wall filled with mineral fibres of high insulating quality and low weight, and as a consequence, low thermal inertia.
The load supporting carriages are entirely made of stainless steel.
The furnace insulation is made of a ceramic fibre layer, capable of resisting 850 degrees and a second layer that resists 550 degrees.
The rising and closing of the doors takes place thanks to closing flywheels that are manually activated.