Domestic Hot Water Temp

If you read the warning labels on the side of most water heaters the maximum hot water temperature is 120 degrees fahrenheit on some labels and 125 degrees fahrenheit on other labels.

Domestic hot water temp. If you read the model codes it states the maximum hot water temperature for a shower or bathtub is 120 degrees fahrenheit. You might be one of many who have heard that the best hot water temperature setting should be 120 f. Consequently osha recommends the minimum water heater outlet temperature in residential systems to be set at 130 degrees f to produce a faucet temperature of at least 120 degrees f. Test your water temperature.

So i investigated why is that. However there is less danger of bacterial growth in smaller domestic hot water tanks. Hot water is normally supplied to fittings and their consumers at 50 60 oc. For canteens and professional kitchen temperatures of 65 oc are often required to satisfy hygienic standards.

Guidelines from the department explain that most hot water heaters are automatically set to. For combined heating hot water and domestic hot water systems when the heating hot water system exceeds 140 f the ipc code requires a temperature actuated mixing valve conforming to asse 1017 to limit the domestic hot water temperature to a maximum of 140 f. The 125 degree limit probably allows for some temperature loss before the hot water gets to the fixtures. That still does not address the maximum storage temperature in the hot water tank.