What Should Tankless Water Heater Be Set To?

Tankless water heater temperature setting – Complete Guide

  • Although tankless water heaters provide a high level of comfort and simplicity of use, this does not imply that they are suited for all customer’s requirements.
  • It is because they are created for commercial interests, in order to meet the needs of a broad range of individuals.
  • One of the most fundamental improvements that customers are looking for in 2022 is the temperature setting for their tankless water heater.
  • As a result, we will be discussing how to alter the temperature setting on your tankless water heater in this article.

Prior to that, if you want to raise the temperature of your tankless water heater because you believe the water is not as hot as it used to be, this does not necessarily imply that you should raise the temperature of your unit as well.In order to choose how to continue, it is necessary to first identify the underlying problem.

Finding Tankless water heater actual temperature

  • Start by opening the tap and allowing the waterfall to run until you receive hot water from the device.
  • Preparation: Get a thermometer and submerge its measuring end for 30-40 seconds under hot water.
  • Take the temperature reading from the thermometer and compare it to the reading displayed on the tankless unit’s display screen.
  • As long as both readings are identical, your tankless water heater is functioning properly, and you may change its temperature to meet your demands.
  • If, on the other hand, the reading you took does not match the one displayed on the device, it is likely that the root of your problem is something altogether else.
  • ″When was the last time you had your tankless water heater flushed/cleaned?″ you should ask yourself at this point.
  • With a response of more than a year ago, the reason of your problem is most likely hard water sediment, which deposits itself on the heating element of your tankless water heater over time and causes it to malfunction.
  • This sediment, also known as scalp, is the deposition of calcium or magnesium present in hard water (bad quality water), which is deposited on heating devices when they are heated.

Because of the larger accumulation scalp, the tankless water heater unit has a harder time heating the water effectively and may potentially have a shorter lifespan as a result of the higher accumulation scalp.

Tankless Water Heater Temperature Adjustment

  • Knowing that you possess a tankless water heater, you are undoubtedly aware that tankless water heaters are designed with the highest temperature setting advised at 120°, which is regarded the optimal temperature for getting a hot shower bath without burning yourself.
  • However, due to the fact that many individuals are seeking for ways to raise the temperature of their water in order to use the more sizzling water to clean their clothing of filth, bacteria, and bed bugs, 140° is a better option.
  • Following the steps outlined below will assist you in accomplishing this goal.

1.     Rheem Tankless Water Heater Temperature Setting

  • You should be aware that raising the temperature too quickly might result in scalding or burn.
  • Be sure to give yourself enough time to discover the most comfortable shower temperature for you before jumping in the shower.
  • Also, make sure no one else is in the shower at the time you are doing this.
  • Step-by-Step Instructions Start by opening the tap and allowing the waterfall to run until you receive hot water from the device.
  • The shut-off valves for gas and water must be closed at this point.
  • Keep pressing and holding the arrow pointing up until the angle changes from 120° to 140°
  • Continue to hold down the Up Arrow while pressing the Down Arrow
  • The temperature has now reached 140 degrees, as can be seen on the graph below. This time, you may change it between 120° and 140°.
  • Open the gas and water shut-off valves, if necessary.

Consider the following scenario: you wish to lower the temperature from a maximum of 140° to a maximum of 120°. You can also choose to do the reverse, as shown in the steps that follow.

  • You may return to a maximum of 120° by pressing and holding the Down Arrow till it travels from 140° to 120°, then pressing and holding the Up Arrow while holding the Down Arrow

The actions that follow will also help you to lower the temperature to less than 100 degrees.

2.     Novitz Tankless Water Heater Temperature Setting

Novitz tankless water heaters, like any other tankless water heater, are equipped with a temperature control with an LED display that can be used to change the water temperature.

  • To switch off the remote control, press the Power button on the remote control.
  • Press and hold the flow alarm button until the temperature on the screen begins to flash
  • then release the button.
  • Use the Up and Down arrows to adjust the new maximum temperature, then hit the Power button to save your settings.
  • You have successfully set the new maximum temperature for your device.

3.     Rinnai Tankless Water heater Temperature Setting

  • Unlike the Rheem and Novitz tankless water heaters, the Rinnai tankless water heater does not allow you to modify the temperature only through the use of the remote control screen. It is necessary to gain access to the unit’s interior part. Step-by-Step Instructions Keep the power to the Rinnai unit turned on because you will be unable to do so in power off mode
  • By moving the safety clips on the device to the appropriate side, they may be unfastened.
  • Following the removal of the clips, you will notice four screws beneath them
  • these are the retaining clips.
  • Remove the front cover of the unit by unscrewing the screws.
  • Upon removing the lid, find and push the A button on your keyboard once
  • Your LED screen will now display the number ″01A.″ To turn it off, press the on/off button once. This will result in the readout on the screen changing to ″01b″ or ″016.″
  • Hold down the ″A″ key until the temperature value is displayed on the screen again.
  • You are now able to raise the temperature to 140 degrees.

How to change the temperature setting on a tankless water heater is demonstrated in this video.

Precautions to be taken before and after adjusting the temperature setting.

  • Make certain that everyone in your home is aware of the temperature change so that they can take appropriate measures as well..
  • When you alter the temperature, be sure no one is in the shower or utilizing the water at the time.
  • The first thing you should do is double-check that the temperature you’ve selected is appropriate for your requirements.
  • You should avoid checking the temperature with your hand since it might scorch your hand in seconds if the temperature has escalated.

It is preferable to use a thermometer to verify the actual water temperature after the adjustment to confirm that it is the temperature you desired.


  • Setting the temperature of your water heater is a simple process that can be completed by almost anybody with minimal training.
  • The secret is in understanding what you’re up against.
  • This method might differ based on the manufacturer and model of the device.
  • In this case, you may always refer to your owner’s handbook.

If you have a tankless water heater from Rinnai, Rheem, or Novitz, you can alter the temperature setting on your tankless water heater by following the instructions outlined in the preceding section.Always exercise caution and warn everyone around you before doing so in order to avoid any incidents of scorching.

Frequently Asked Questions

  • What can I do to make my tankless water heater heat up more quickly?
  • This is accomplished by the installation of a recirculation pump.
  • A recirculation pump circulates the hot water to the faucet and returns the cold water in your pipe back to your tankless water heater, saving you money on energy costs.
  • In this manner, you will receive hot water from the faucet at the same time that you have opened the faucet.

What is causing my tankless water heater to go cold?In plumbing jargon, this is referred as as a sandwich.A sandwich refers to the outflow of water that alternates between cold, hot, and cold.This occurs as a result of your tankless water heater not receiving a sufficient flow of cold water to properly kick start its operation.

  1. This occurs when numerous faucets are open at the same time, allowing the majority of the cold water to flow to one location.
  2. The amount of cold water being provided to the tankless water heater is inadequate to cause the flow sensor to be activated by the sensor.
  3. Almost every tankless water heater is equipped with a flow sensor, which is often located near the cold water intake valve.
  4. The tankless water heater will only come on when the quantity of cold water flowing into the device exceeds the minimal amount that the flow sensor can detect or activate, according to the manufacturer.
  5. Is it possible to determine whether a tankless water heater is properly heating the water?

You may check the temperature with a standard household thermometer.Bring the thermometer under the running hot water and let it there for 30-40 seconds to warm it.Taking note of the temperature reading on the thermometer, compare it to the temperature reading displayed on the tankless water heater’s LCD display screen.

Tankless Water Heater – Setting the Right Temperature

  • Your tankless water heater has unexpectedly gone out of service, and you’re stuck with no hot water?
  • You’re in the shower when all of a sudden the warm water is replaced with frigid!
  • You may reach us at 281-302-6710 to get it resolved.
  • It is possible that the temperature setting on your tankless water heater is the source of the problem.

In this video, Master Plumber Bryan Graham explains why this occurs and how to correct the problem.

Summary of Setting the Temperature of Your Tankless Water Heater

  • Occasionally, clients contact us because their tankless water heater is constantly cycling on and off.
  • When we walk outside, we notice that the water heater is set to an excessively high temperature most of time.
  • As a result, many individuals turn the heat up as high as they possibly can, reaching temperatures over 140 degrees.
  • If you have a tankless water heater, that water heater has a flow switch, and you must have a significant amount of water flowing through that water heater for that water heater to activate.

The water heater also mixes the hot water it produces with cold water in order to provide you with the temperature you choose when the shower head is turned on.For starters, if you have the water heater set to 140 degrees, you are mixing much too much cold water with far too little hot water in order to keep the temperature at the shower head comfortable.This results in a low amount of water flowing into the water heater.It is possible to resolve this issue by turning down the temperature of the water heater.

  1. It’s actually recommended that you use 120 degrees, although I know a lot of individuals who prefer hotter water.
  2. As long as you maintain the temperature about 130 degrees, you won’t have to worry about becoming too hot when taking a shower.
  3. The 140-degree setting is intended for business use rather than for personal showers in the home.
  4. While taking a shower, you’ll actually get more hot water if you lower the temperature setting to 120 degrees or at most 130 degrees, rather than 120 or 130 degrees.
  5. You’ll be generating enough flow to turn on that tankless water heater and keep it running during your shower session.

Excellent customer service!After less than an hour, they were at my house to have a check at my hot water heater.Benjamin was really kind and professional, and he even went the extra mile by calling the manufacturer and requesting that they send out replacement components under warranty as soon as possible after the incident occurred.

He went out of his way to make sure I had hot water to keep me going till the parts came.I’m so delighted, this is the greatest customer service I’ve ever had!

Lona Howell

Recommendation from Facebook Graham Plumbing Services is certified A+ by the Better Business Bureau of Houston and services consumers in Sugar Land, Missouri City, Katy, and other communities around the greater Houston region. See what our customers have to say about us by reading their reviews and testimonies.

We’re Service Plumbers Too!

Our plumbers are certified to fix and replace your water heater as well as install new ones. Changing the temperature setting on your tankless water heater might sometimes solve the problem with your tankless water heater. To get your water heater inspected, call us at 281-302-6710 or click on the icon below.

Tankless Water Heater Temperature Setting 2022 – Important Things To Consider

  • Take frigid or blistering hot showers, depending on your preference.
  • Is it possible that you like lukewarm water?
  • Even though many homeowners may not give much thought to their tankless water heater on a regular basis, it is an important component of your home’s plumbing system.
  • An inefficient water heating system might be the most significant contributor to high power and water expenses.

This makes scheduling regular repair and maintenance of your unit vital in order to guarantee that hard water is not hurting it and that the unit is operating within the optimal temperature range.Tankless water heater temperature setting may appear to be a matter of personal preference, but there are a number of factors to consider.There are several safety and health hazards that you should be aware of.There’s also the matter of saving money on water and power bills to consider.

  1. In addition, you should make every effort to reduce your impact on the environment.
  2. We can no longer afford to waste the few resources available on our beloved world, such as electricity and water.
  3. We must acknowledge that having access to these priceless possessions entails a duty of gratitude on our part.
  4. We should remember that half of the world’s population does not have access to safe drinking water, therefore we should act responsibly.

Tankless Water Heater Temperature Setting – Things To Consider

Safety And Health Concerns

  • Upon installation of a water heating equipment on your property, the temperature is set to 140 degrees Fahrenheit as a default setting.
  • It is possible to get burnt if you take a bath with only warm water while the temperature is this high.
  • Toddlers and the elderly are at a very high risk of suffering severe burns.
  • Children’s skin is particularly sensitive, and elderly people’s reflexes may take a long time to recognize that the water is excessively hot.

As a result, you may be asking why the tankless water heater temperature control has been set to an excessively high setting.There are two primary reasons for this:

Bacterial Accumulation Prevention

  • Bacteria tend to congregate in warm, stagnant water, although it can also accumulate in cold water on occasion.
  • However, it is most commonly seen growing in water that is between 41 and 135 degrees Fahrenheit in temperature.
  • The temperature setting of 140 degrees Fahrenheit is somewhat higher than the risk zone limit of 130 degrees Fahrenheit.
  • As a result, producers regulate the temperature to avoid bacterial development.

Despite this, some specialists believe that a temperature of 120 degrees Fahrenheit is safe for the majority of people.Individuals with a weakened immune system or who suffer from persistent respiratory issues are not eligible for treatment.A pre-set water temperature is included with the newer units, and they also have an anti-scaling technology that delivers water to the tap at 120 degrees Fahrenheit.In electric tankless water heaters, legionella bacteria accumulates in the machine’s bottom and has the potential to cause a type of pneumonia in those who are exposed.

  1. It is spread in the air by inhaling filthy water droplets when bathing or taking a shower.
See also:  How Much To Get A Tankless Water Heater Installed?

Marketing Perks

  • When companies offer you a tankless gas water heater, their first aim is to ensure that you are completely satisfied.
  • The fact that you have energy and water bills does not worry them.
  • They want you to be completely happy when you turn on the water faucet and receive properly warm water from the faucet.
  • In the event that you receive just lukewarm water, the vast majority of you will conclude that the device is incapable of heating water and that your hard-earned money has been spent.

The temperature of a tankless water heater may be adjusted to provide hot water with no effort.The temperature of the water has absolutely nothing to do with the overall quality and durability of the heater.However, it has a significant impact on sales psychology.As a result, you should not place too much emphasis on the temperature of the device because it is only a question of adjustment.

  1. Nonetheless, investing in a high-quality heater will prove to be useful in the long run.

Energy Savings

  • The best hot water heater temperature for the most majority of propane water heaters, as previously indicated, is 140 degrees Fahrenheit.
  • The Department of Energy in the United States, on the other hand, recommends a temperature of 120 degrees Fahrenheit.
  • You may also adjust the amount according to your own requirements and tastes.
  • If you are going to be away for a few days, it is best to set the thermostat to 120 degrees F to prevent bacteria from growing within the unit.

Frequent Hot Showers

If you have a large family who takes many showers at the same time, a 20-degree temperature difference might have a significant impact on the amount of hot water available. If you take regular hot showers in your home, the 120 degrees Fahrenheit tankless water heater temperature setting is the best choice for you.

Dishwasher Performance

Do you have a dishwasher that is more than a decade old? Many earlier versions do not have an advanced heater, and as a result, they will not be able to wash the utensils correctly with a tankless water heater temperature change of less than 140 degrees Fahrenheit.

Kids And Elders In The House

The water temperature should be set at 120 degrees F in homes with small children and elderly residents to reduce the danger of burning or scorching at the water fixture.

How To Set The Best Temperature For Tankless Water Heater?

  • There are five distinct types of water heating systems available for purchase in the marketplace.
  • Whether you have a standard tank-style or a tankless unit, we will provide extensive instructions on how to control the temperature of your unit in order to save money on your utility costs.
  • In addition, you will learn how to regulate the temperature on a Rinnai tankless water heating system.
  • So let’s get started.

Solar-Powered Heaters

  • These gadgets rely on the energy provided by the sun and therefore require solar panels to be installed on the roof.
  • They perform admirably on bright, sunny days, but in inclement weather, you will want a backup unit to keep you safe.
  • When it comes to energy efficiency, they are just great.
  • However, before you can put them to use in your home, you must first obtain clearance from the government.

Apart from that, it is incredibly expensive, and you will not get a return on your investment for a lengthy period of time.They are equipped with a control panel, which allows you to easily adjust the temperature to suit your requirements.

Tankless Water Heaters

  • No container is provided as implied by the name of this group. Their operation is dependent on super-heated coils that quickly heat water anytime you use it. Because they are available in several sizes, you may choose the one that best suits your water requirements.. Tankless gas water heaters perform significantly better than electric water heaters. The electric ones, without a doubt, will increase your electricity bills. The next step is to learn how to adjust the temperature of both gas and electric heaters. Adjusting the temperature of a tankless gas water heater They are typically equipped with a setting knob or lever that may be turned to get the desired temperature.. The temperature control valves for tankless water heaters have a knob with different names on it, such as a, b, and c, on them. The labels on the water heaters of various brands are different from one another. The following is the significance of each label: Low temperature is 80 to 90 degrees Fahrenheit
  • hot temperature is 120 degrees Fahrenheit
  • very hot temperature is 160 degrees Fahrenheit
  • A temperature is 130 degrees Fahrenheit
  • B temperature is 140 degrees Fahrenheit
  • C temperature is 150 degrees Fahrenheit

Some machines additionally offer a ″vacation″ mode, in which the water is not heated but the pilot light is kept lit.

Electric Tankless Water Heater Temperature 

Take control of the circuit breaker and seize control of the access panels. Under the insulation, look for the thermostat tankless water heater temperature adjustment. Using the flat screwdriver, move the thermostat control closer to the desired temperature. Change the access panels and insulation first, and then turn on the electricity to complete the process.

Heat Pump Water Heaters

  • The heat from the wind and the soil is used by these gadgets to raise the temperature of the water.
  • They just utilize electricity to transmit heat; they do not use it to generate it.
  • Furthermore, it is equipped with a boiler that must be cleaned on a regular basis.
  • These gadgets have the potential to save you up to 60% on your electricity expenses.

They are, however, quite expensive, and their deployment necessitates a significant amount of room.The pump at the top of the tower requires around 8 feet of vertical space.

Condensing Heaters

These water heaters heat the water by utilizing exhaust gas as a heat source. If you have access to a natural gas supply in your neighborhood or home, this unit would be an excellent alternative for you. Because it has a larger tank, it is an excellent choice for large families. It has a control panel that allows you to adjust the temperature.

Tank-Storage Water Heaters

  • Traditional water heaters are capable of heating a large volume of water quickly and efficiently.
  • Because the tank is insulated, the water remains warm for an extended period of time.
  • The boiler’s capacity is limited, so if you demand more hot water than the boiler can provide, you may have to wait up to an hour or more for it to refill.
  • They are low-cost and are most typically seen in residential and commercial settings, where they provide excellent value.

The main drawback is that they use a lot of energy when in use.As a result, you may install a timer that will switch off the heater when the water reaches the desired temperature, so lowering your energy expenses.It is necessary to first obtain a straight screwdriver in order to manage the temperature of the device.After that, turn off the heater and remove the top and bottom covers from the room.

  1. With the aid of the screwdriver, you may make adjustments to the thermostat.
  2. Replace the covers and turn on the electricity.

How To Improve The Efficiency And Performance Of The Tankless Water Heater?

Install Water Heater Controller Kit

  • Water heater controller kits are now readily accessible on the market, and they are inexpensive.
  • As a result, if you have a solid internet connection and a mobile phone or tablet, you may purchase and install it to regulate the temperature of your unit.
  • With this kit, you will be able to operate your device from any location on the planet.
  • Additionally, you may turn it off to conserve energy and then turn it back on when you get home.

Insulate Traditional Tank-Style Machines

If you have a tanked water heater, you should consider insulating it in order to keep the water hot for an extended period of time. In order to avoid standby heat loss, this is an inexpensive and practical solution.

Replace Out-Dated Models

  • If your appliance is older, or if you regularly take showers with cold water, the likelihood is that your heater is not operating efficiently.
  • The installation of a new gadget may provide you with a more pleasant and stress-free start to your day than previously.
  • Because current hybrid and tankless systems are extremely energy efficient, you may save a significant amount of money on your utility costs by utilizing them.

Descale It

  • The hardness of the water might reduce the effectiveness of your system.
  • Mineral development within the container has an adverse effect on the container’s performance and longevity.
  • When the temperature is high, the buildup increases.
  • As a result, reduce the temperature and descale your boiler every three months by utilizing the best tankless water heater flush kit available to you.

You may also arrange expert repair and maintenance services for systems that have been neglected for a long time.

Decrease The Water Flow

It is possible to reduce the amount of warm water used by replacing old-fashioned showerheads and fixtures with newer models that require less water flow.


  • Now that you’ve finished reading this comprehensive guide, you should be fully aware that the greatest tankless water heater temperature setting is 120 degrees Fahrenheit in ideal circumstances.
  • By using this option, you may save money on electricity while also reducing the risk of burns and other health risks.
  • The best part is that it destroys bacteria, ensuring that you and your family remain safe and healthy.
  • It is possible to find a variety of various water heating systems on the market.

The most recent models contain a temperature control knob that allows you to quickly fine-tune the temperature to your specific tastes.You may also install a control kit that allows you to adjust the functioning and temperature of the device using your mobile phone that is linked to the internet.

What should I set my tankless water heater to?

  • Asked in the following category: General The most recent update was made on March 8, 2020.
  • In most cases, when you buy a tankless water heater, you will discover that the manufacturer has already set the thermostat at a temperature of 140 degrees Fahrenheit for you.
  • That is a well accepted practice.
  • However, for the purposes of the majority of families, it is not necessary to raise the temperature to such a high level.

Tankless water heaters provide an infinite supply of hot water while taking up less space, posing a reduced danger of leaking, being safer, and having an overall lifespan that is substantially longer than conventional water heaters.The most important drawback of tankless water heaters is that their upfront cost (both for the device and for installation) is substantially greater than that of tank-style water heaters (see chart below).One could also wonder how a tankless water heater is able to heat water so quickly.Because the pipe material is cold (unless you have just used hot water), it will absorb heat from the water as it travels to the sink, and it will continue to do so until the pipe reaches the same temperature as the water.

  1. The length of time it takes to bring hot water to the sink increases with the temperature of the pipe.
  2. Also, can you use a tankless water heater to heat your home?
  3. This is another question that has been raised.
  4. In fact, a tankless water heater can readily heat the majority of single-family residences with ease.
  5. A tankless water heater is also smaller and less expensive than a boiler or a furnace, which is another benefit of using one.

Combi-systems are heating systems that employ a single heating device to provide both space heating and domestic hot water at the same time (or combo-systems).What is causing my tankless water heater to go cold?Another issue that tankless water heaters might encounter is the phenomenon known as a cold water sandwich.

A cold water sandwich is a plumbing phrase that refers to abrupt temperature variations that occur when your tankless water heater alternates between producing hot and cold water.This can be caused by one of the following: a clogged water filter on the cold water entrance.

What should a tankless water heater be set at?

  • Asked in the following category: General The most recent update was on the 5th of February, 2020.
  • In most cases, when you buy a tankless water heater, you will discover that the manufacturer has already set the thermostat at a temperature of 140 degrees Fahrenheit for you.
  • That is a well accepted practice.
  • However, for the purposes of the majority of families, it is not necessary to raise the temperature to such a high level.

The process of adjusting the temperature on a tankless heater is straightforward.Each tankless water heater or point-of-use device is equipped with an LED display that allows you to set the required temperature.Rather from adjusting the temperature using a dial control that is less exact, you may change the temperature degree by degree.What are the disadvantages of a tankless water heater, on the other hand?

  1. Tankless water heaters provide an infinite supply of hot water while taking up less space, posing a reduced danger of leaking, being safer, and having an overall lifespan that is substantially longer than conventional water heaters.
  2. The most important drawback of tankless water heaters is that their upfront cost (both for the device and for installation) is substantially greater than that of tank-style water heaters (see chart below).
  3. Furthermore, can a tankless water heater be used to heat water for the entire house?
  4. Tankless water heater for the entire house Compared to single-fixture units, whole-house units have greater GPM flow rate capacity and can meet the demand for several fixtures at the same time.
  5. It is possible that a single unit will have the capacity to manage two shower fixtures at the same time, or to handle a dishwasher, kitchen sink, and lavatory hot water faucet at the same time.

What is it about a tankless water heater that allows it to heat water so quickly?Because the pipe material is cold (unless you have just used hot water), it will absorb heat from the water as it travels to the sink, and it will continue to do so until the pipe reaches the same temperature as the water.The length of time it takes to bring hot water to the sink increases with the temperature of the pipe.

See also:  How To Check Water Pump On Car?

Tankless Water Heater 101

There are advantages and disadvantages to using a tankless water heater; it all comes down to how much hot water your home wants and how patient you are with your investment in order for it to pay for itself.We’ll guide you through the major pros and cons of each option to assist you in making an informed purchasing decision….Even while tankless water heaters are more expensive (often up to three times as much as a typical water heater), they have a longer life cycle and can drastically reduce your power bills.

If you use 41 gallons or less of hot water per day, a tankless hot water heater can save you between 24 and 34 percent on your energy bills compared to a storage tank heater.If you use more hot water per day (for example, 86 gallons per day), they can be 8 percent to 14 percent more efficient in terms of energy usage.Additionally, the life expectancy of a tankless water heater is often greater than 20 years.

  1. The primary advantages of a tankless water heater will be discussed in this tutorial, as will how to determine the size and kind of water heater you’ll require, how they function, and what makes them distinct from one another.
  2. When purchasing a tankless water heater, there are various considerations that must be made.
  3. We’ll go over some of these considerations later.

Advantages of a Tankless Water Heater

There are a number of advantages to using a tankless water heater rather than a traditional tank water heater.What really distinguishes a tankless water heater from a traditional water heater is the fact that they can eliminate standby heat loss from occurring.Tankless hot water heaters heat water on demand, as opposed to traditional hot water heaters, which heat and store water on a continuous basis.

In other words, there will be no hot water sitting idly in a tank, wasting its heat.Some tankless water heaters are controlled by a thermostat, which allows you to vary the temperature of the water they produce more easily.Another advantage is that they take up less space and are better for the environment because the rusted tank isn’t disposed of in a landfill like conventional tanks.

  1. Your larger, traditional heaters, with their 30-50 gallon tanks, take up a significant amount of floor space.
  2. It is possible to find containers that are 60 inches tall and 24 inches wide that hold 40-60 gallons.
  3. In comparison, a tankless water heater is about the size of a large computer, which explains why these bad boys are so popular in small homes with limited space for storage.
  4. The maximum temperature rise possible at a given flow rate is used to rate the performance of these tankless hot water heaters.

You’ll need to figure out how many hot water devices you intend to use at the same time (for example, running the washer and shower at the same time) and multiply the total flow rate by the number of hot water devices (in gallons per minute).When looking for the best tankless water heater, you’ll want to aim for a flow rate that meets your requirements.Low-flow water fixtures can help you save money on your water bill by lowering the flow rate.

Calculating Temperature Rise

When choosing on which kind to choose, you should take into account both the flow rate and the temperature rise involved (ie: difference between groundwater temperature and desired output temperature).It’s possible to see the average groundwater temperature in your region by looking at this map.Simply subtract the temperature of your ground water from the temperature of your intended output.

The temperature of your water should be between 100 and 115 degrees Fahrenheit when it is being heated.If the temperature of your groundwater is 60 degrees and you want your shower to be 110 degrees, it will result in a 50-degree increase in temperature.

Calculating Flow Rate

It is possible to compute the flow rate by adding up the GPM for all of the household water faucets that will be used at the same time.The flow rate of a bathroom faucet with low flow is estimated to be between 0.5 and 1.5 GPM.The majority of faucets installed after 1992 have a flow rate of 2.2 GPM, with 3.0 and 5.0 GPM available after 1992.

The flow rate of a kitchen faucet can range from 3.0-7.0 GPM.There are no low-flow statistics for kitchen faucets since they do not employ aerators.Showers have a modest flow rate that is typically between 1.0 and 2.0 GPM.

  1. Pre-1922 heads have a flow rate ranging from 4.0 to 8.0 GPM.
  2. A circulation system can be added to the heat source if you discover that hot water is not reaching your faucet as soon as you would like.
  3. Depending on the tankless type you pick, it may already be configured for the addition of a circulation system, eliminating the need to reconfigure pipework or a buffer tank.

What Size Tankless Water Heater Do I Need?

In order to assist you in determining the tankless hot water heater that is required for your needs, here is an example from Compact Alliance: The temperature of an ordinary shower will be between 104 and 106 degrees, and it will require 2.6 gallons of water.Assuming that the water temperature entering your home is 40° and that you wish to create enough hot water to run two showers at the same time, what temperature rise would you need to produce to achieve this goal?Answer: You’ll need to elevate the temperature of the entering water from 40 degrees to 105 degrees.

As a result, you’ll need a tankless water heater that has the ability to heat at least 5.2 gallons of water per minute and can achieve at least a 60-degree increase in temperature while pumping out 5.2 gallons per minute.

How Does a Tankless Water Heater Work?

When you turn on the hot water tap, the water begins to heat up.It is heated by a gas burner or electric components after the cold water has traveled via a pipe into the device and reached the heating element (heating coils).A high-capacity heat exchanger efficiently transfers heat from one source to another.

The passage of water causes this exchanger to become active.Heaters’ intake and output temperature measurements are taken into consideration by flow sensors, which monitor the precise flow rate as well as the temperature data.This information is passed on to the temperature control unit.

  1. Combustion gases are properly vented out of the building using a specialized and sealed vent system.
  2. Instead of having to wait for the storage tank to fill up with enough hot water, you may use a hot water heater right now.
  3. The disadvantage of tankless heaters is that their output restricts the amount of water that can flow through them.
  4. Tankless water heaters heat water at a rate of 2-5 gallons per minute on average, according to industry standards.

Although the flow rate of gas-fired tankless water heaters is higher than that of electric ones, they are nevertheless stressed when numerous hot water sources are running at the same time, as is the case in many households.Alternatively, you may install two or more tankless water heaters, or you can build separate heaters for different items that need a large amount of hot water, to address the difficulties.It is necessary to consider the fuel type, environment, local building code requirements, and safety considerations when installing these systems appropriately to ensure a safe installation.

Tankless Water Heater Pros & Cons

Tankless water heaters, according to the United States Department of Energy, save an average of $108 in energy expenditures per year when compared to standard tank water heaters, on average.Electric tankless heaters save $44 per year on heating costs.However, this figure must be weighed against the cost of the heaters themselves to be meaningful.

A tankless water heater can range in price from $1,000 to $3,000 depending on the model.You’ll want to be certain that your home is capable of supporting a tankless water heater.If your utilities are solely electric, for example, you’ll need to improve your electrical system to accommodate this.

  1. This may be a time-consuming and expensive undertaking.
  2. Tankless water heaters might also be more difficult to install than traditional water heaters.
  3. It is possible that the gas pipe, gas meter, and gas line to the meter in your house are not the proper size for the high gas load that will be required to replace the typical storage gas heater in your home.
  4. These heaters may underperform or even pose a safety danger to your family if they are not placed properly.

Energy Efficient

Tankless water heaters that use natural gas are 23 percent more efficient than standard storage water heaters, according to research (60 percent efficiency).Tankless water heaters fuelled by natural gas are also eligible for a $300 tax credit.For storage-tank water heaters, you’ll be able to calculate how much hot water the heater can supply over a specific amount of time by factoring in the first-hour rating and the gallons per minute for tankless water heaters, among other factors.

Hot water heaters are normally capable of producing 3.5 gallons of hot water per minute on average.If you need less than 41 gallons of hot water per day in your house, a tankless water heater is an excellent choice for your situation.According to Energy.gov, they can reduce your energy use by 23 percent to 34 percent in your situation.

Types of Heaters

It is possible to purchase two distinct types of tankless heaters: one at the point of use and one for the full home.Point-of-use systems are limited in their ability to heat water for only one or two outlets.Because they’re so compact, you can easily tuck them away beneath a cabinet or inside a closet.

You’ll be able to limit water loss by shortening the time between events (time it takes for the hot water to reach your faucet).In bigger homes, this lag period might span several minutes or even several hours.You may also choose between versions that run on electricity, propane, or natural gas.

  1. When compared to point-of-use versions, which are often powered by electricity, whole-house systems are powered by natural gas or propane.

Gas and Propane

As a result of their greater power, gas and propane-powered heaters are suited for use in whole-house systems.The storage tank is the most significant distinction between a whole-home gas tankless water heater and a normal gas water heater.When compared to a traditional gas tankless water heater, an Energy Star certified tankless water heater harnesses the potential of a secondary heat exchanger to cut energy usage by 9 percent, according to the company.

This secondary exchanger removes any excess heat from the combustion gas and cools it down to the point of condensing it.It is from this process that the term ″gas condensing″ is derived.They also necessitate the installation of a vertical PVC pipe and a condensate drainage system.

  1. Electric models are more common at point-of-use scenarios, while some individuals choose to purchase two of them in simultaneously.


A tiny electric tankless heater is a preferable option for those who want to take a shower in their pool house or have hot water for an outdoor meal. In addition, electric versions emit no greenhouse emissions and may be controlled from a distance using a remote control. You also won’t have to be concerned about floods if your tank ruptures either.

Getting the Best Tankless Water Heater

We aim to assist you in selecting the most appropriate tankless water heater for your hot water demands and financial situation. Please get in touch with us if you are interested in a tankless hot water heater. Our licensed professionals are available to answer any queries you may have and do the service on YOUR timetable.

What’s The Best Water Heater Temperature Setting?

  • A hot shower may receive a bad name from your dermatologist since it might dry up your skin, but many people like it for its relaxing properties! In a household where hot water is fiercely competed for among family members, or even between your washing machine and dishwasher, you may be tempted to raise the temperature of your hot water heater. But at what point does it become too hot? There are differences of opinion between the Department of Energy and the industry. Scalding can occur at temperatures below 120 degrees Fahrenheit, although 140 degrees Fahrenheit is the normal default temperature. Any temperature below 120 degrees Fahrenheit, according to the majority of experts, increases the likelihood that germs from stagnant water, such as the bacterium legionella, which causes Legionnaire’s disease, would form within your water heater. Whatever temperature setting you choose, it’s vital to remember that the kind of pipe used, how the water is heated (gas or electric), and whether your system is tanked or tankless have no effect on the temperature you choose. There are, however, a number of elements to take into consideration when determining your thermostat setting: Stick with 120°F if you have small children and/or the elderly in your house who are prone to third-degree burns in seconds, or if you are a single occupant owing to the decreased demand for hot water in your home.
  • Consider 140°F if you have an immunocompromised individual in your home, a dishwasher that does not pre-heat, or a multi-occupant household owing to the increased need for hot water.

But what about the expenses of energy?We get what you’re saying!Water heaters account for around 14-18 percent of the total energy consumed by a residence on a typical day.

Furthermore, it may be tempting to lower the temperature in order to save money.It should be noted that a 10°F decrease in temperature is related with a 3-5 percent reduction in energy use.Legionella, on the other hand, can live at temperatures as high as 122°F.

  1. So make sure to strike a balance between your risk tolerance and your energy consumption targets!
  2. If you’re still on the fence, play around with it.
  3. Many hot water heaters are equipped with a temperature control dial.
  4. If yours does not, run the water for a few minutes and use a thermometer to check the temperature of the water thereafter.

Start with 120°F and gradually increase the temperature in small increments until you get your desired result.All things considered, it is possible that your house is not as simple as ″simply″ setting a temperature and forgetting about it.A water tank booster may be an appropriate option in houses where the requirement to maintain a greater hot water temperature for health safety must be balanced with the need to reduce the danger of scorching.

  • To inhibit pathogens from growing in your tank, it retains the temperature at 140°F while mixing with cold water to provide a lower temperature at the faucet.
  • Alternatively, you could live in a house where, no matter what temperature you select, hot water takes an inordinate amount of time to reach the faucet (or a certain tap farthest from the hot water heater).
  • A hot water circulating system circulates hot water gently through the pipes so that you are not forced to wait.
  • Whatever you choose, we’re only a phone call away if you’re having issues with your hot water!
See also:  How To Replace Gas Water Heater

Ideal Water Heater Temperature Settings: Tank & Tankless

Even though you may not give your water heater much thought on a regular basis, it is an extremely important part of your home’s plumbing system and should not be overlooked.Although most people set their water heater temperature between 130 and 140 degrees Fahrenheit, according to Consumer Product Safety Commission guidelines, reducing your water heater temperature to 120 degrees Fahrenheit can save you money and avoid scorching.Keeping the temperature of your water heater lower will save you a lot of energy and money while also extending the life of the heater.

It is discussed in this article what the optimal temperature settings for water heaters are.

What Is Normal Water Heater Temperature?

Manufacturers of water heaters are not required to specify a specified operating temperature for their devices.Some businesses adhere to the Consumer Product Safety Commission’s advice that their heaters be set at 120 degrees.However, data indicates that at least 41% of water heaters operate at or above this temperature.

Some families are quite content with it.Others, on the other hand, may be at risk for second-degree burns as a result of this.Your water heater’s working temperature typically varies between 120 and 140 degrees Fahrenheit, as we’ve already established.

  1. It is your responsibility to investigate and determine the operating temperature of your heater.
  2. Water heaters that have a temperature indicator are available on the market.
  3. The problem is that they aren’t always dependable, which may be frustrating.
  4. Choose a more exact temperature measurement to be on the safe side.

You might choose a faucet that is as far away from your water heater as you possibly can.Allow the water to flow at a variety of settings for a certain amount of time.Choose the temperature setting that is most comfortable for you.

  • However, for reasons of safety, the temperature should be set at 120 degrees Fahrenheit at all times.

What Temperature Should Your Water Tanks Be Set At?

A specified temperature for water heaters is not required by law, thus manufacturers are free to do so.According to the Consumer Product Safety Commission, some firms set their heaters to 120 degrees, which is the recommended temperature.However, research indicates that at least 41% of water heaters operate at or above this temperature..

For some families, that is perfectly acceptable.Those who suffer second-degree burns, on the other hand, may be at greater danger of death.Your water heater’s working temperature typically fluctuates between 120 and 140 degrees Fahrenheit, as we’ve previously demonstrated.

  1. It is your responsibility to determine the operating temperature of your heater.
  2. Water heaters that have a temperature indicator are available on the market today.
  3. Despite this, their dependability is sometimes called into question.
  4. Choose a temperature value that is more accurate for your safety.

A faucet that is located as far away from your water heater as feasible is an option to consider.A specified duration of time should be allotted for the water to run at various settings.Choose the temperature setting that’s most comfortable for you at this time.

  • However, for the sake of safety, the temperature should be set at 120 degrees Fahrenheit or more.

Measure the Current Temperature

Before you can alter or set your temperature, you must first know the temperature of the water that is flowing from the faucet or the showerhead.You can accurately test the temperature of your water with a conventional kitchen thermometer, which is inexpensive.Start by turning on the hot water tap located near your water heater, which should be the first step in this process.

Collect water in a container and use a thermometer to determine the temperature of the water.Keep the thermometer in place until the temperature readings on the thermometer stop climbing.If the temperature on the thermometer does not reach 120 degrees Fahrenheit, raise the temperature of your water heater.

  1. The thermostat should be adjusted to reduce temperatures if they become excessively hot.

Access the Thermostat

First, turn off the water heater’s power source before making any modifications to the water heater.Electric heaters are often configured with two thermostats and two heating components, which is standard practice.As a result, you’ll need to get access to the thermostats and make adjustments.

Set the thermostat to the same temperature as the furnace for optimal operation.The access panels should be removed with a flat-head screwdriver or a Philips screwdriver.Remove the screws holding the panel in place in order to reveal the thermostat.

  1. After that, you may proceed with adjusting your thermostat.
  2. It is possible that you may need to remove insulation in order to see your thermostat clearly.

Test the Water temperature

Before making any adjustments to the water heater, consider taking some measurements of the present temperatures.Take a jar of hot water and use a kitchen thermometer to determine the temperature of the water.It will provide you with the ability to determine its current temperature.

After that, you may proceed to make the necessary changes to the heater.Using a cooking thermometer, confirm that the temperature has been reached at the appropriate level.If it has, everything is in working order.

Water Heater Temperature and Saving Energy

Setting the temperature of your water heater to the proper level will help you save money on energy costs, regardless of the type of water heater you use. The following are some measures you may take to guarantee you conserve energy:

Set The Temperature to 120° F

As we’ve seen, unless you have persistent respiratory issues or a compromised immune system, 50 degrees Celsius (120 degrees Fahrenheit) is a comfortable temperature.It is not necessary to raise the temperature of your water heater any further.Setting your thermostat to 120 degrees Fahrenheit will assist you in conserving electricity.

Whenever you decrease your thermostat by 10 degrees Fahrenheit, you will save between 3-5 percent on your energy bills.

Select An Energy Efficient Appliance

50 degrees Celsius or 120 degrees Fahrenheit is sufficient temperature for most people unless they have persistent respiratory issues or a reduced immune system.It is not necessary to raise the temperature of your water heater.Setting your thermostat to 120 degrees Fahrenheit will help you save money on your energy bills!

Whenever you decrease your thermostat by 10 degrees Fahrenheit, you will save between 3-5 percent on your electricity bill.

Use Cold Water

Not that taking cold showers is a need, but it may be the most beneficial option in some situations. For example, you should always wash your hands and your clothing with cold water to avoid spreading germs.

How to Adjust the Water Heater Temperature On Your Unit

There are at least five different types of water heaters available on the market. Let’s go over them one by one in terms of lowering your energy bills.. We’ll also go through how you can adjust the temperature of the heaters, which includes:

Storage tank Water Heaters

  • The majority of them are classic heaters, which heat only as much water as the tank can comfortably contain at a time. Due to the insulation, the tanks will remain warm until water is required.. If you need more hot water than the tank can hold, you’ll have to wait until the tank refills. It takes around 1 to 2 hours for the water in the tank to heat up once more. These heaters are among the most popular and least expensive alternatives available. They can, however, be made more energy efficient if you use a timer to operate them. It enables the heater to be turned off when the water reaches the desired temperature. In order to alter the temperature on the tank water heaters, follow the instructions outlined below: After turning off the heater, remove the bottom and top covers
  • adjust the thermostat with a flat screwdriver
  • replace the covers
  • and then turn the heater back on.

Tankless Water Heater

These water heaters do not have a tank to store water.They feature coils that are super-heated and can heat water instantly.In order to accommodate the volume of water required, the coils are available in a variety of various diameters.

Natural gas is the fuel of choice for the vast majority of tankless water heaters.The use of an electric heater will almost certainly result in an increase in your energy cost.The LED panel may be used to change the temperatures.

Heat Pump Heaters

Heat pumps use the heat from the ground and the air to raise the temperature of the water in their reservoirs.Heat pump heaters, like all other types of heaters, utilize electricity to transport heat rather than to create it.There is also a tank that has to be cleaned on a regular basis.

Heat pumps are well-known for their energy-saving capabilities, which may save up to 60% on energy expenditures.However, they require a significant amount of room for installation and are prohibitively expensive to purchase.

Solar Powered Water Heaters

These heaters heat water by harnessing the force of the sun.If you want to get the most out of your solar panels, you should install them on your roof.When used in warm climates and on sunny days, the water heaters are useful.

During the rainy season, make sure you have a backup water heater ready.Solar-powered heaters are environmentally friendly.However, unless you receive a subsidy from the government, the expense of installing them is prohibitively expensive.

  1. They are equipped with a control panel that allows you to simply alter the temperatures.

Condensing Water Heaters

Exhaust gas is used to heat the water in these water heaters. If your home is equipped with natural gas, condensing gas is the most cost-effective alternative. Because of its big tank, the water heater is very well suited for large family houses. From the control panel, you may adjust the temperature to your preference.

Does Turning Up Your Water Heater Make Hot Water Last Longer?

Increasing the temperature of your water heater is one option for dealing with the problem.The technique taken here is to utilize less hot water while the temperature of the water is still high.The likelihood is that you have ever been in a warm or hot shower that suddenly become ice cold is considerable.

It is a negative sensation, regardless of whether it is part of your bedtime ritual or your morning wake-up call.The issue here is that your hot water isn’t staying hot for as long as it should.To accomplish this, increase the temperature of your thermostat that is attached to your hot water tank.

Considerations When Selecting a Water Heater Temperature Setting

A number of factors must be taken into account when determining the appropriate temperature setting for your water heater. The following are some questions that you must be able to respond to:

Are There At-Risk People Living In Your Home? 

It is possible that persons who are sensitive to high temperatures will be badly harmed if the water is really hot.For example, it would take only two seconds of exposure to hot water at 150 degrees Fahrenheit for a tiny baby to suffer third-degree burns.If a newborn is exposed to 140 degrees for only 5 seconds, the same degree of burns is also feasible.

Lowering the temperature is, therefore, not only safer for your kid, but it is also more cost-effective for you.If you have a newborn in your home, we recommend that you keep your heater temps at 130 degrees or above.When exposed to excessively hot water, older adults are also more likely to suffer burns and other injuries than younger ones.

  1. They should likewise adhere to the same rules and principles as everyone else.
  2. People who suffer from respiratory problems or have weakened immune systems, on the other hand, may require greater temperatures in order to generate a higher steam concentration and destroy microorganisms.
  3. Temperatures of around 140 degrees are recommended for such adults, given that there are no children present in the home.

Do You Own Energy-Efficient Appliances?

Dishwashers that pre-heat are currently more popular than they have ever been.Such systems take in water and then heat it to higher temperatures in order to provide a more hygienic cleaning environment.These results are achieved without the need for you to increase the warmth emitting from the heater.

When it comes time to replace or repair your dishwasher, we recommend that you look for one that has a pre-heat system built in.If this isn’t possible, you can raise the temperature of the water heater to 140 degrees by pumping it.It keeps the water hot and pleasant for use in the dishwasher while still being safe for your family.

  1. You must, however, have an enough supply of cold water to compensate.

How Many People Stay In Your House?

Especially when it comes to taking a shower, everyone has a favorite temperature for their water heating system.With the help of the cold and hot water knobs, you can effortlessly adjust the temperature to your liking.If you want a hotter shower, increase the hot-to-cold water ratio in your shower.

A lower ratio indicates a colder shower experience.The temperature of the water flowing from the water heater, on the other hand, has an impact on the results as well.Because hotter water comes from the heater, you will require less hot water and more cold water in order to get the desired temperature.

  1. If the heater is set at a lower temperature, you will use less cold water and more hot water.
  2. It also implies that if you set the water temperature to a lower setting, you will run out of hot water more rapidly.
  3. If you have a large house with many people living in it, raise the temperature of the water to ensure that the supply lasts for a longer time.
  4. Smaller dwellings with fewer occupants are able to operate at lower thermostat settings.

Health and Safety Considerations

When you purchase and install a water heater in your house, the temperature should be set at 120 degrees Fahrenheit.It is the factory-set temperature for the product in this configuration.Take a shower with the water flowing at this temperature and you’ll most certainly get burnt and scalded, according to the experts.

As we’ve seen, the elderly and children are the most vulnerable groups when it comes to burns.However, there are still valid reasons why the temperatures are maintained at such elevated levels:

Preventing Bacterial Growth

Water that is stagnant and lukewarm is ideal for the growth of bacteria.The danger zone is between 105 and 135 degrees centigrade, despite the fact that certain germs flourish in either hot or cold temperatures.Sulfur or a ″rotten egg″ odor in your hot water is frequently the result of this phenomenon.

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