I'm coding some stuff for water heaters and one of the functions is anti-Legionella.
Anyway, I've read on wikipedia that 90% Legionella dies in first two minutes if the water temperature is 60°C, but I'm interested in how long should the temperature be 60°C for 99.99999% of Legionella to die? (I guess I can never get to 100%)
Follow-up question: On what intervals should this be done so that the water isn't contained? Should it be one week, two weeks, several days?
Final question: If the water in a water heater has 60°C for 30 minutes every 2 weeks, would the water be safe?