... the using life can last 15 years8) Temperature when exposed to sun without water: 250,2.5 hours to boiling point ... switch off the power supple before bathing10) Please test the water temperature before using, in order to avoid scalding. Modelproduct Size(mm ... steelStructure of tank:4 holes for exhaust port, overflow, water inlet and outlet, electric heater is optionWelding:Argon arc weldingFastening ...