For example, temperatures under 50 C may increase the risk of Legionnaires’ disease, a form of pneumonia, due to bacterial growth in the tank. That disease is caused by Legionella bacteria, which live in water. Temperature is a critical factor for Legionella to grow. The risk of colonization in hot water tanks is significant between 40 and 50 C.
热水温度太高,容易不小心烫伤。
As a way to prevent scalds, injury prevention advocates have lobbied to have settings on domestic hot water tanks reduced to 49 C from the accepted 60 C standard.