Tankless Water Heater Temperature Setting 2022

Tankless Water Heater Temperature Setting 2022 – Important Things To Consider

A hot shower can be a harsh and drying experience for skin. If competition is fierce for hot water in your home across family members, a hot shower might be a great way to share the water amongst theme or even with your washing machine or dishwasher.

You can temper your water heater to the desired temperature, but what is the ideal temperature for the water heater?

The Department of Energy and manufacturers have different opinions on the safe temperature of hot water. 120°F is the recommended temperature to keep hot water at, but 140° F is the most used default setting.

Tankless Water Heater Temperature Setting
Tankless Water Heater Temperature Setting

Most experts agree that anything below 120 degrees creates a risk for bacteria to develop inside your water heater from stagnant water, such as Legionella that causes Legionnaire’s disease.

Whatever the fuel type, it’s important to note that type of pipe, how the water is heated (gas or electric) and whether your system is tank or tankless does not affect temperature setting.

Whatever your water heating system, it’s important to note that type of pipe, the type of gas used (natural gas or propane), and whether your system is tank or tankless doesn’t affect water temperature.

Sticking with 120°F if your home includes: young children and/or elderly who are susceptible to third-degree burns within seconds, single occupant due to lower demand on hot water

Consider 140 °F if your home includes: an immunocompromised person, a dishwasher that doesn’t pre-heat, multi-occupant due to higher demand on hot water.

But, what about energy costs? We hear you! On average, water heaters account for about 14-18% of a home’s energy consumption. And, it might be tempting to decrease temperature for savings. Note that a 10°F reduction in temperature is associated with about 3-5% savings in energy. However, legionella can survive in temperatures up to 122°F. So, balance out your risk acceptance with your energy consumption goals!

If you’re still undecided, try fiddling with it. Many hot water heaters have a temperature dial. If yours does not, let the water run for a few minutes and take the temperature with a thermometer. Start at 120°F and bump up in small increments to your satisfaction.

How To Set The Best Temperature For Tankless Water Heater?

There are five different kinds of water heating systems obtainable in the stores.

Whether you have a traditional tank-style or tankless unit, we will be sharing detailed information on how to set its temperature for saving money on energy bills.

The Rinnai tankless water heater is quite a popular brand. You will also learn how to adjust the temperature on it.

Solar-Powered Heaters

These appliances rely on the power of the sun and need solar panels positioned on the roof. They work well in bright sunny weather, but when it’s stormy, a back-up unit is needed.

Tankless Water Heater Temperature
Tankless Water Heater

They are energy-efficient, but before you buy them, you will have to check with the government if they are allowed in your region.

It is expensive, so you might not see a return on your investment. They have nice control panels so you can easily adjust the temperature to your liking.

Tankless Water Heaters

The Freshwater Lights do not have a container—they rely on superheated coils that heat water promptly whenever you want it.

There are different sizes of water heaters, so you can pick one that seems best for your needs. Tankless gas water heaters work better than electric ones.

Gas and electric heaters both have different temperatures and settings. Knowing how to set them can be very beneficial in saving on energy bills.

Temperature Setting Of Tankless Gas Water Heater

They usually have a setting xxxx, or a handle that can be rotated to adjust the preferred temperature. The tankless water heater temp control valves have a xxxx, or label with different labels such as a, b and c

  • Low= 80 to 90 degrees Fahrenheit
  • Hot= 120 degrees Fahrenheit
  • Very Hot= 160 degrees Fahrenheit
  • A= 130 degrees Fahrenheit
  • B= 140 degrees Fahrenheit
  • C= 150 degrees Fahrenheit

Some machines also have a “vacation” mode that does not warm the water but keeps the pilot light kindled. 

Electric Tankless Water Heater Temperature

The first thing to do is to turn off the circuit breaker and confiscate the access panels. The thermostat tankless water heater temperature adjustment will be under the insulation.

Set the thermostat control towards the preferred temperature using the flat screwdriver. Change the access panels and insulation and then, switch on the electricity.

Heat Pump Water Heaters

These appliances utilize wind and earth to increase the water temperature. They use electricity only to transfer heat from the wind and earth, not to generate it.

Moreover, it has a boiler that must be cleaned frequently. These appliances can help you save up to 60% on your power bills.

However, they are very costly and need a lot of space to be deployed. The pump on the crown requires approximately 8 feet of vertical space.

Tank-Storage Water Heaters

These conventional water heaters have the capacity to heat a huge volume of water. They keep the water warm for a long time because it is insulated.

If you require extra warm water, you will have to wait for the boiler to fill-up again.

There are many types of HVAC systems. They are used in residential and commercial spaces, but they also use a lot of energy.

To reduce energy bills, you can install a timer that turns off the heater when the water reaches the desired temperature.

To regulate its temperature, first of all, you need to grab a straight screwdriver. Then, switch off the heater and eliminate the top and bottom covers. Adjust the thermostat with the help of the screws.


Now, after reading this helpful guide, you are well aware that in a perfect situation, the best tankless water heater temperature setting is 120 degrees Fahrenheit.

This setting allows you to save electricity and reduce the hazards of burns and other health problems. The best thing is that it kills bacteria, so you and your loved ones will stay safe and healthy.

There are different types of water heating systems available out there. The latest ones have a digital temperature display so that you can easily fine-tune the temperature according to your personal preferences.

You can also control the heating and cooling system using your phone using a web-based mobile app.

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