Display of the innovative heating and ventilation system of the parliament. The heating and ventilation system in the building – which was quite a sensation in its day as one of the most modern such systems in Europe – works perfectly even today after some updating. The hot steam from the furnace room located in a nearby facility reaches the various rooms through a distribution chamber and radiators. Originally, the air was cooled with cold air that entered the building through the fountain with two pools on the square. With the removal of these pools between the 1930s and 1994, the building was cooled with many tonnes of ice piled up in two huge shafts.