These baths were used until the 20th century and have an entrance hall, a cold room, a warm room and a hot room. The room in the photo is adjacent to the cold room and had bathroom utensils and latrines.
In the hot room there is an opening that allowed boiling water to be taken. The hot air produced by the boiler was distributed under the floor of the room through a low-rise chamber. As the floor was very hot, people were pouring buckets of water continuously, and that generated steam. Only a few minutes passed here.