What temperature should a domestic hot water system aim to maintain for safety?

Maintaining a domestic hot water system at the correct temperature is crucial for both safety and efficiency. The ideal temperature for a hot water system to reduce the risk of scalding while still ensuring that water is hot enough to prevent bacterial growth, such as Legionella, is typically under 120 degrees Fahrenheit. This temperature is recommended because it minimizes the risk of burns, especially for vulnerable individuals like children and the elderly.

Setting the temperature higher than 120 degrees Fahrenheit can increase the risk of scalding significantly. While some may consider temperatures under 150 degrees Fahrenheit acceptable for some applications, they still present a burn risk. Keeping water temperature under 120 degrees Fahrenheit helps ensure safe handling and reduces hazards associated with excessively hot water. Therefore, aiming for a temperature under 120 degrees Fahrenheit not only promotes safety but also encourages responsible energy use.