What should I set my water heater temperature to in order to balance both efficiency and safety? Is there a specific range that is universally recommended for residential water heaters, or can this vary depending on the household’s unique requirements? How do factors such as the presence of young children or elderly individuals in the home influence this decision? Moreover, what are the implications of setting the temperature too high versus too low? Could excessive heat lead to scalding, thus necessitating a more cautious approach, or might a lower temperature foster bacteria growth in the water supply? Additionally, how do regional climates and seasonal changes play a role in determining the optimal setting? Are there potential energy savings associated with selecting the right temperature, and could this choice impact the longevity of the water heater itself? What guidelines might experts endorse to navigate these multifaceted considerations effectively?