Hot water tank for open and closed operation. Closed inner tank, 0.6 Mpa, made of steel, specially enamelled. Protective anode. Outer casing white painted sheet metal casing, thermal insulation made of polyurethane rigid foam. Universal circuit, operation in single circuit and double circuit with different connected loads possible. Temperature selector continuously adjustable from approx. 30 °C to 85 °C. Energy saving setting at 'e' = 60 °C and 'E' = 40 °C. Safety temperature limiter, signal lamp. Quality and safety marks: CE mark, VDE mark