The sauna is a cube made from acrylic panels heated by a 6W electric heater. Temperatures can exceed 71°C [160°F]. The sauna’s complete transparency allows for the extremely small size. It’s the most private and most open space of all the projects. The small size of this sauna allows for an efficient heat-to-air volume ratio. When you’re inside the sauna sometimes you see the entire city, and at other times, when it fogs up, you’re focused on yourself or your companions.