Oven insulation arrangement

An analytical device having an oven arrangement that comprises:

• an oven,
• a housing comprising a bottom, a wall element and a cover;
• where the wall element of the housing comprises bottom apertures that allow air to pass between the external environment and the lower region of the outer air chamber, and top apertures that allows air to pass between the upper region of the outer air chamber and the external environment;
• an insulation system, comprising:
• a base insulation, arranged in the housing, comprising a support system that supports the oven and having apertures;
• a lateral insulation jacket, that surrounds the oven and is in contact with the base insulation;
• and
• an inner capping, arranged on the oven to thermally decouple the oven and the cover of the housing, and
• a ventilation system comprising:
• a first convection system that is a natural convection system, configured to cool the housing;
• and
• a second convection system that is a forced convection system, configured to reduce the temperature within the oven, the second convection system comprising a bottom air chamber that is defined by the base insulation, the bottom of the housing and the wall element, an inner air chamber, arranged between the oven and the lateral insulation jacket, the inner air chamber connected with the bottom air chamber through the apertures of the base insulation, an intermediate air chamber, arranged between the lateral insulation jacket and the inner capping, the intermediate aft chamber connected with the inner air chamber and with the top apertures of the housing, and a ventilation device, arranged to draw aft into the bottom air chamber, such that an aft stream, driven by the ventilation device, moves from the bottom air chamber through the inner air chamber and the intermediate aft chamber towards the top apertures of the housing.