What is the ideal temperature setting for a residential water heater?

The ideal temperature setting for a residential water heater is 120 degrees Fahrenheit. This temperature strikes a balance between providing sufficient hot water for domestic use and minimizing the risk of scalding. At this setting, water is hot enough for bathing and cleaning purposes, which optimizes comfort and efficiency in daily activities.

Additionally, maintaining the temperature at 120 degrees helps in reducing energy consumption, as higher temperatures can lead to increased energy costs without providing significant benefits for typical household needs. It also decreases the risk of bacterial growth, such as Legionella, that can occur in water that is stored at lower temperatures. Hence, with safety, efficiency, and health in mind, 120 degrees Fahrenheit is considered the most optimal setting for residential water heaters.