This depends on the size of the area and what health care materials are chosen. There are bian stone, tourmaline and tourmaline, so it depends on the kind. There are more than 2,000, 3,000 and 4,000 on the market. I suggest you install a water circulation steam room, because the current steam room needs to be safe and fire-proof. The steam room recommends Dongri thermal energy. I hope my answer is helpful to you.