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How to adjust Water Heater Temperature

Reducing Water Heater Temperature

Water Heater TemperatureReducing Water Heater Temperature safely saves energy by:

Reducing the amount of heat that is lost out of the hot water tank (known as stand-by losses). If appliances, such as clothes washers and dishwashers, use hot water at the temperature supplied by the water heater; and do not mix this water with cold water to achieve a set hot water temperature, additional savings will occur.

Avoiding possible burns or scalding. Water temperatures over 110°F – 120°F can cause severe burns in a matter of seconds.

Adjusting the hot water temperature is relatively easy. (New water heaters, by law, are set at the safer lower temperatures.) A homeowner can usually make this adjustment.

Electric Water Heaters: The thermostat is usually located behind a cover plate; and can be accessed by removing a few screws.

Many electric water heaters have two thermostats – one for the upper heating element and one for the lower. Make sure to adjust both of them.

When lowering the setting on an electric water heater, be sure to shut off the power at the circuit breaker/fuse box to avoid the danger of electric shock.

Gas Water Heaters: If the thermostat dial is visible, simply adjust it to the desired temperature.

The lowest temperature is the safest setting.

Experiment with the setting to find a temperature that provides adequate hot water, while still minimizing wasted energy.


If you have any further questions or concerns regarding water heater safety or any of your other HVAC needs, DeMark Home Ontario is more than willing to help solve your problem. Our experts will provide you with quick and efficient water heater service and replacement performed by our highly experienced and trained technicians. Call us at 647-847-2998 or fill out online request form and we will be happy to assist you with your request.


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This item comes with absolutely free standard installation. We’ll ensure that the product is completely installed to code and fully functioning prior to leaving.


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Save money on this item when buying it along with a qualifying high-efficiency furnace or air conditioner.

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Great news! When renting a qualifying water heater, you’ll get your first 2 months absolutely rent free.


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Notice for Power Vent Water Heater Customers

Effective August 2007, gas code requires technicians working on venting to replace black ABS vent pipe with white UL-certified vent pipe.

We will upgrade your venting pipes at no additional cost.

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