What is the recommended water temperature setting from a mixing valve to the domestic water system?

The recommended water temperature setting from a mixing valve to the domestic water system is typically between 49°C to 54°C (120°F to 130°F). This temperature range is considered safe for domestic hot water use while effectively minimizing the risk of scalding injuries, particularly in environments with children or the elderly. Additionally, this temperature range is high enough to inhibit the growth of harmful bacteria, such as Legionella, which can thrive in lower water temperature settings.

Using a temperature within this range for mixed domestic hot water systems ensures a balance between safety and hygiene. Water below this temperature could pose a risk for bacterial growth, while higher temperatures (such as those above 60°C or 66°C) could significantly increase the potential for burns or scalding.