which has no electricity at all b and the second unit stays outside of the shower hanging to the wall that contains a steam generator is like a kettle that boil water and with a hose that guide the hot steam mist into the main panel and the dry sauna is like a hair blower with heating element and a metal fan to blow the hot air through a hose to guide the hot air into the shower through the main panel and a computer control system all connections are connected behind the wall with flexible or hard hoses and wires c the steam nozzle and the water drain join together so the installer don 39 t have to build a new drain that may be costly as you can see in the diagram i sent you page 2 of 6 the 2 units main panel inside shower and outside box are connected by a steam hose made in metal stainless steel or copper covered by an isolant so the heat do not escape hose can be fixed or flexible b water hose made in metal stainless steel or copper to supply water from the panel to the steam generator hose can be fixed or flexible c water exhaust hose made in metal stainless steel or copper hose can be fixed or flexible the water exhaust 3 and steam exhaust 1 come out at the same place connected by a t shape connection so the customers do not have to build a new drain for the water exhaust after the steam bath the excess water inside the steam generator remaining will.