... , the depth should not exceed 0.48m. 4.An automatic water circulation and filtration system, as well as heating equipment ... rooms must be separated from one another, with dual-temperature shower heads for cold and hot water and shower curtains ... sauna design and assistance requirements: SaunaRooms, Dry Steam Rooms, Temperature-Controlled Spas and Jacuzzis with Massaging Jets, and Water Heating and ...