... OEM 3) more efficence stainless steel water box 4)inlet/outlet diameter:1/2inch Wet sauna steam generator:functions: The control ... of soft and comfortable environment.Material: super galum board,stailess steel tank, copper inlet and outlet , copper handle with zinc4 ... - 18kW power options, in-shower thermostatic control, stainless steel tank, long-life elements, automatic water feed, dual low- ...