The “calidarium” was the second room after the “tepidarium” in ancient Roman thermae. At a 50°C temperature and a 98% humidity rate, the calidarium was the vapor bath room. The vasodilation effects of heat, are beneficial for your blood circulation and eliminate your stress and tiredness. The heat and humidity help curing breathing problems and joint pain intervening on rheumatic and arthrosis pain. Moreover, high transpiration helps you eliminate toxins and excessive liquids. In modern spas, the calidarium is often made with freestanding fireproof expanded polyester cabins or fiberglass prefab panels. They are thermally insulated and come with pre-mixing and vapor blowing systems, air recirculation systems and power saving devices.