(1)Factory (2)ODM&OEM (3)High efficiency,energy saving and eco-friendly (4)Intelligent control (5)Good quality& best pric It is mainly apply at school ,dormitory,star-level hotel,sauna,Spa, etc It is satify to large using water.(when it is working, water tank added hot water into water tank ;when consumption bigger than heating capacity,water tank temperature still keeping). Features:1.Using the ...