How to Set a Tankless Water Heater Temperature

Cold showers are fantastic for re-energizing your body but should not be done frequently. There’s also the aggravating scenario of getting scalded by hot water. Setting the right temperature on your tankless water heater is critical for your health and safety. It may also save you a few dollars.

Why is an appropriate temperature range so important?


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Even if your safety and comfort are the most obvious reasons for selecting the proper temperature, several more factors must be considered. Showering with lukewarm water is likely if the temperature is too low. You may not have a cold but acquire bacterial growth, such as Legionnaire’s disease.

The water heater must be adjusted to a temperature that prevents legionella bacteria from growing. OSHA (Occupational Safety and Health Administration) recommends that water heaters (of any sort) be set no lower than 140F degrees. Legionella and other microbes are less likely to survive in this environment.

Some may be tempted to go higher, but the water will be too hot and unsafe, especially if children are around. Did you know that it only takes 150 degrees Fahrenheit for water to cause third-degree burns? To reduce the danger of scalding, the CPSC (Consumer Product Safety Commission) recommends not setting the water heater higher than 120F degrees.

Running your tankless water heater at high temperatures will raise your power cost. And one of the many reasons you converted to tankless water heaters was to save money on your utility bills.

Let us remember that every home has its quirks. It is also important to consider the distance between the faucet and the water heater. Heat is lost when the tap is far from the water heater, especially if the pipes need to be well insulated. It would be best if you raised the temperature over the recommended 120F.

Finally, apply common sense when setting the temperature on your tankless water heater. Temperatures ranging from 120 to 140F are ideal. When it comes to changes, it’s perfect to do a few tests until you know what temperature works best for your house.

ECOTOUCH Tankless Water Heater

  • Brand : ECOTOUCH
  • Color : White
  • Wattage : 5.5 KW
  • Voltage : 240 Volts
  • Maximum Flow Rate : 1.5 Gallons Per Minute


ECOTOUCH Tankless Water Heater 5.5kW 240V

How do you change the temperature on a tankless water heater?

It doesn’t take a rocket scientist to recognize that tankless water heaters have diverse interfaces. Therefore the settings might vary greatly. However, the modifications are very similar.

A thermostat is located just behind the insulated access panel on gas and electric water heaters. Electric variants often have two thermostats, one at the top and one at the bottom.

Tankless water heater systems are classified into two types: huge home units that may offer on-demand hot water to the entire house and POU (point of use) devices positioned at a delivery point. You can customize them for a specific application based on your requirements.

Most tankless water heaters have a display with a temperature reading and simple buttons for adjusting the temperature.

Setting the tankless water heater is similar to altering the thermostat for the air conditioner. Adjust the temperature on the digital control panel using the up and down arrows. The LED controls on the board allow you to regulate the temperature more comfortably than typical tank-style water heaters. You may adjust the temperature degree by degree rather than utilizing a less precise dial control.

If you have many tankless water heaters in your home, you may regulate the temperature for each one separately. Hotter water may be required in your bathroom than in your washing machine.

Remember to adjust the vent controls when employing a gas-fired tankless water heater. You may regulate the temperature with the fan settings provided by the computerized temperature controls. You want a system that removes fumes that pose a concern when you forget to switch on the hot water for a while.

One final suggestion

It’s best to test the water before making any modifications, regardless of the kind of water heater. Please turn on the water in a kitchen or bathroom sink and let it run until it’s hot. Submerge a thermometer in water for an accurate reading.