The risk of legionella contamination in drinking water installations is subject to particularly strong influence from the temperature of the drinking water. To prevent legionella growth, the hot water outlet of the drinking water heater must be kept at a steady temperature of 60°C. Throughout the hot water network, the temperature must not fall below 55°C .

Although circulation systems are supposed to perform this task, they often fail due to the complex hydraulic conditions. Changing operating conditions repeatedly cause the temperature to drop alarmingly in certain parts of the system. 

KEMPER automatic regulating valves react to temperature changes in the hot water return system by further opening or closing the valve and therefore rebalance the system dynamically.

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