What Is The Best Temperature For A Tankless Water Heater?

Tankless Water Heater Temperature Setting 2022 – Important Things To Consider

  1. Take frigid or blistering hot showers, depending on your preference.
  2. Is it possible that you like lukewarm water?
  3. 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.
  4. 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.
  • In addition, you should make every effort to reduce your impact on the environment.

We can no longer afford to waste the few resources available on our beloved world, such as electricity and water.We must acknowledge that having access to these priceless possessions entails a duty of gratitude on our part.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

  1. Upon installation of a water heating equipment on your property, the temperature is set to 140 degrees Fahrenheit as a default setting.
  2. It is possible to get burnt if you take a bath with only warm water while the temperature is this high.
  3. Toddlers and the elderly are at a very high risk of suffering severe burns.
  4. 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

  1. Bacteria tend to congregate in warm, stagnant water, although it can also accumulate in cold water on occasion.
  2. However, it is most commonly seen growing in water that is between 41 and 135 degrees Fahrenheit in temperature.
  3. The temperature setting of 140 degrees Fahrenheit is somewhat higher than the risk zone limit of 130 degrees Fahrenheit.
  4. 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.
  • It is spread in the air by inhaling filthy water droplets when bathing or taking a shower.

Marketing Perks

  1. When companies offer you a tankless gas water heater, their first aim is to ensure that you are completely satisfied.
  2. The fact that you have energy and water bills does not worry them.
  3. They want you to be completely happy when you turn on the water faucet and receive properly warm water from the faucet.
  4. 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.
  • 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.With the aid of the screwdriver, you may make adjustments to the thermostat.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 Is The BEST Water Heater Temperature Setting?

  • Please keep in mind that this content may contain affiliate links.
  • This means that, at no additional cost to you, we may gain a small profit on purchases made via our links.
  • In the event that you have already adjusted the temperature and are complaining to yourself that you ″have no hot water″ or ″don’t have enough hot water,″ there are a few reasons that might be impacting the heat.
  • If all else fails, it’s possible that the heating element is faulty and has to be replaced.

How To Check Your Water Heater Temperature

  • The majority of water heaters do not have a temperature gauge with a digital readout on them.
  • A temperature or heating range is marked on the thermostat, rather than a number.
  • A cup and a culinary thermometer will be required in order to correctly determine the temperature of the hot water heater.
  • If you haven’t used your water heater in at least one hour, turn on the faucet that is nearest to it.
  • Allow the water to run for at least one minute to ensure that the water is at its warmest possible temperature before filling the cup with it.
  • Insert your cooking thermometer and make any necessary adjustments to the temperature settings.

Recommended Temperature Settings

  • Water heaters are pre-programmed to operate at temperatures about 140 degrees Fahrenheit, which is recommended by OSHA.
  • The Environmental Protection Agency, on the other hand, recommends lowering the thermostat down to 120 degrees Fahrenheit to save power use and using a booster heater to attain sanitizing temperatures at certain outlets.
  • Another point of view is that lower temperatures are preferable for homes with little children, although higher temperatures are more effective in cleaning and sanitizing surfaces.
  • Recommendation from me Personally, I feel that the temperature of a water heater should be set around 130 degrees in practically all circumstances.
  • However, the temperature is low enough to avoid scorching while being high enough to destroy hazardous microorganisms.
See also:  How To Reset Water Filter On Kenmore Refrigerator?

How To Turn Up Your Water Heater

  • If you are dissatisfied with the suggested temperature of your hot water heater, you may alter the settings to receive extra hot water.
  • Although electric water heaters may require a screwdriver and potentially a tiny wrench or socket, most hot water heater settings are straightforward to modify.
  • Keep in mind that the thermostat is factory configured to a recommended temperature, and that altering the setting may increase the risk of significant burns from the appliance.

How to Set Temperature on a Gas Water Heater

  • The temperature of a gas water heater may be adjusted by turning the setting knob on the water heater. The majority of gas control valves have a knob with different designations on them, such as A-B-C. Control valves for gas water heaters may be labeled differently depending on the manufacturer. In the majority of circumstances, the following is what each label indicates: Temperatures range from 80-90 degrees
  • hot (or triangle sign) = 120 degrees
  • A = 130 degrees
  • B = 140 degrees
  • C = 150 degrees
  • Very Hot = 160 degrees

There is a ″Vacation″ setting that appears from time to time. This does not heat the water, but it does ensure that the pilot light remains lit.

How to Set Temperature on an Electric Water Heater

Turn off the circuit breaker if necessary. Remove the access panels from the room. Under the insulation, look for the thermostat adjustment screwhole. Adjust the thermostat control to the appropriate temperature by using a straight screwdriver to make the adjustment. After replacing the insulation and panels, the power should be restored. Here’s a good video that demonstrates the procedure:

Factors That Affect Water Temperature

  • Some of the things that may influence the temperature of your hot water include the distance between the water heater and the outlet, the way the pipes are built, and the quality of the heating element itself, among others.
  • Because of the length of the pipe and the small bore size, it will take longer for the hot water to reach the opening.
  • Additionally, pipes that run beneath or outside the residence may be exposed to freezing or freezing temperatures in the winter and summer.
  • If you have a big house, you may want to consider installing a hot water recirculation system, which may reduce the amount of time it takes to send hot water to all of the outlets in the house, as well as provide significant cost savings over time.
  • If setting the thermostat does not result in the desired temperature, it is possible that the water heater element has to be replaced.
  • Alternatively, if you don’t notice a difference in water temperature after changing the thermostat, it’s likely that you have a malfunctioning thermostat that has to be replaced.

Eight cold-climate tips for tankless water heaters

Tankless water heaters are popular due to their small size and low energy use, and the fact that they run on propane allows them to be put almost anywhere. Consider the following eight recommendations for specifying, installing, and maintaining tankless water heaters in areas that experience snow and freezing temperatures.

1. Choose a size that’s cold-weather ready.

  • If you live in a cold area, one of the most important water heater recommendations to remember is to correctly size tankless units, says Linda Cahill, vice president of Tankless Concepts, a company that distributes and installs Rinnai and Navien products in Falls Church, Virginia.
  • Because the incoming water temperature is cooler in the winter, the tankless unit is unable to heat as much hot water, according to her.
  • ″We size units in accordance with winter temperatures, ensuring that there is always adequate hot water for the entire household.″ Consider that a unit that can generate around 8.5 gallons per minute in the summer in the Washington, D.C., region may only be able to produce 5.5 or 6 gallons per minute in the winter.

2. Design for the coldest conditions.

  • The ″worst-case scenario″ in terms of how low the ground water temperature can go and how much water a household uses, according to Jason Fleming, senior marketing and customer care manager at Noritz, is critical for builders to consider.
  • He also recommends that they understand delta T, or the difference between the set temperature of the unit and the ground water temperature.
  • When a 120-degree Fahrenheit setting is used with a 60-degree Fahrenheit ground water temperature, a 60-degree Fahrenheit increase is required, which is referred to as the delta T.
  • Specifically, he explains that ″the wider the gap or the greater the delta T, the lower the performance flow of the unit.″ ″Our size charts display the performance, or flow rate, at each delta T,″ says the author.
  • Neither Noritz’s propane nor gas tankless water heaters are susceptible to freezing conditions since they are surrounded by an electric ceramic heater that prevents the heat exchanger from freezing.

3. Indoors or outdoors?

  • Although Noritz’s tankless water heaters have freeze protection provided by an electric ceramic heater that surrounds the heat exchanger, some models are rated for lower temperatures than others, so installers should check the unit specifications to determine which model is best suited for their region’s climate.
  • Even while water heaters in southern California, where the firm is founded, are often put outside, they must be brought within in areas that experience continuous cold weather.

4. Be sensible with venting.

  • Proper venting is also important for water heater maintenance when it is chilly outside.
  • Fortunately, there are a variety of gas water heater venting alternatives available: As Fleming points out, ″be certain that heaters are not vented into impending frigid winds, and that their vent runs are long enough to ensure good operation of the heater.″ When it comes to chilly places, six feet is the suggested minimum.

5. Offer snow advisories.

  • The company Tankless Concepts urged its clients to clear snow from around their vents after a historic blizzard in Washington, D.C.
  • According to Cahill, when a vent is vented from a wall, the vent should be 12 inches above the surface of the ground.
  • ″Our latest snowfall was significant enough, especially when combined with drifting, to completely engulf the ventilation pipes.
  • Rinnai models draw air in through an exterior pipe, and if the pipe becomes obstructed by snow, the machine shuts off automatically.
  • You must have a couple of feet of space around the vent for the device to function correctly; as soon as you have that clearance, you may resume normal operations.″

6. Remind recirculators.

Tankless Concepts advises customers who have units with a recirculating loop (which reduces the amount of time spent waiting for hot water) to switch off that feature overnight during a storm as a safety precaution. This is due to the fact that if the vent termination gets snowed under, the machine will attempt to continue operating until it detects an error code and shuts down.

7. Consider the condensation.

He also recommends another freeze-prevention measure: while building a condensing unit, be sure to route the condensate drain via an enclosed, heated room, advises Fleming In any other case, if the condensate drain freezes, an error code will be generated, which will prevent the unit from producing hot water.

8. Have a backup power option.

Preparation is the best policy in any situation. Many tankless water heaters require energy to run their freeze prevention measures as well as to power the heater’s ignition when there is a demand for hot water. Using a propane standby generator or a battery backup system, you can assure that your clients’ hot water will continue to flow even if the electricity goes out.

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.It’s actually recommended that you use 120 degrees, although I know a lot of individuals who prefer hotter water.As long as you maintain the temperature about 130 degrees, you won’t have to worry about becoming too hot when taking a shower.The 140-degree setting is intended for business use rather than for personal showers in the home.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.

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.

What Is The Best Temperature For A Hot Water Heater

  • Because of the exploding popularity of tankless water heaters, soaking in hot baths and taking hot showers has become significantly more convenient in recent years. Tankless water heaters, without a doubt, have made it possible to have rapid hot water available anytime it is needed. However, it is vital to remember that if the water temperature is not selected properly, it can have a negative impact on your health and skin in a variety of undetectable and unexpected ways. For a tankless instant water heater, what is the optimal operating temperature? This is the question that comes to mind at that point. As we all know, stagnant water in water heaters and water pipes that are used to transport water serve as breeding grounds for a wide variety of infections. Furthermore, if the water temperature is set incorrectly, there is a significant chance of scorching and legionnaires disease developing. These are some of the possibilities that might arise as a result of the water temperature: If the water temperature is too high, you may get scald
  • if the temperature is too low, you may acquire legionnaires’ disease.
  • If you want to take blistering hot showers or prefer lukewarm water, the temperature of the hot water is more a question of personal taste than anything else.
  • Undoubtedly, determining the optimal and optimum temperature for a tankless hot water heater is a matter of personal preference, but there is much more to consider in this respect.
  • This has an influence on our health and skin, as well as on the energy and water grids itself, and we cannot ignore it.
  • The excessively hot water may cause severe burns to our skin.
  • In addition, it may result in increased power use and the wasting of cold water while waiting for hot water.
  • Above all, while determining the optimal temperature for a tankless water heater to provide hot water, careful thought must be taken into account.

The temperature range of a tankless hot water heater is quite important in this context.Setting the temperature to 140°F may provide a safety risk due to the possibility of scorching.Furthermore, the lukewarm water encourages the growth of germs, which may be harmful to one’s health.As a result, the lowest degree Fahrenheit is likewise not appropriate.Instructions on how to select the optimal temperature for a tankless water heater Multiple water applications necessitate various flow rates, and the flow rate is computed by multiplying the GPM of home fixtures required at the same time by the number of water applications.For example, at 102°F, a bathroom tub has a flow rate of 4.0 GPM.

Shower flow rates range from 2.5 to 3.0 GPM when the temperature is 104°F.Additionally, the average flow rate for a washing machine for laundry is 2.0 GPM when the temperature is 120°F.Furthermore, at 110°F, the dishwasher and kitchen sink provide 1.5 GPM of water.

How To Adjust Tankless Water Heater Temperature

  • Setting the temperature of a tankless water heater is not a difficult procedure.
  • Thanks to the most recent technological advancements and innovations, adjusting the temperature has never been easier.
  • Almost all of the best tankless water heater manufacturers are equipped with an LED screen, which makes it simple to regulate the temperature to your liking.
  • These control panels provide exact temperature control, allowing for the production of the desired output.
  • Furthermore, they make it possible for you to select the temperature of the tankless water heater in degrees Fahrenheit by degrees Celsius.
  • Furthermore, if you have various point-of-use devices instead of a whole-house tankless heater, you will need to set different temperatures depending on the fixture and your hot water use.

Similar to this, the on-demand heater near the washing machine has varied temperatures, and the kitchen sink has different temperatures to keep up with the demand and flow rate ahead of the washer.In addition, it is simple to operate a vent that is compatible with your tankless water heater.You may adjust the temperature of the water heater through the use of a computerized temperature control system, which has a fan setting.An efficient tankless water heater with the appropriate temperature setting is a convenient and economical equipment that provides immediate hot water on demand.

See also:  Which Berkey Water Filter Is Best?

How to Set the Temperature on a Tankless Water Heater

  • To see your utility costs grow out of control is a disturbing experience.
  • That is most likely the primary reason why some people choose to replace their water heater with a tankless model.
  • What’s the harm in trying?
  • Despite the high initial cost, it is ecologically friendly, very efficient, and will help you save money in the long run despite its high initial cost.
  • Your carbon footprint will be reduced as a result of reducing your gasoline consumption.
  • However, ensuring that you have the appropriate temperature setting might be difficult.

Tankless water heaters typically have a default temperature setting of 120°F and will not heat the water any hotter than that temperature setting.It is a safety feature designed by heater manufacturers to avoid unintentional scalding, which is especially important if you have youngsters in the house.It is also a method of conserving energy that might assist you in reducing your gasoline use.If you need to turn it up a notch, a couple tweaks on the control panel will do the trick.To help you understand how to set the temperature on a tankless water heater, we’ve put together this page with instructions.

Types of Tankless Water Heaters

  • A tankless water heater can be divided into two types of systems.
  • The first is the most basic whole-house system, which warms water in a central heater and delivers it when a faucet is opened.
  • As the name implies, it caters to the entire home and is the greatest option for those who consume less water on a regular basis.
  • This has the problem of causing standby heat loss, as well as heat loss when transporting water from the tank to the tap.
  • It negates the energy-saving characteristics of a tankless water heater.
  • The second type of gadget is called a POU, which stands for point-of-use device.

Basically, it works by heating water in close proximity to the water output, such as a faucet, bathtub, or showerhead.When numerous POU devices are installed, each outlet or exit point may be controlled independently, allowing for greater temperature control.They are particularly well suited to households with daily water use in excess of 40 gallons.In the event that many water outlets are used at the same time, they are prone to creating a restricted water supply.Related: Rheem Water Heater – Troubleshooting Guide (Extended Edition)

Normal Setting Temperature on a Tankless Water Heater

  • The default temperature setting of 120°F is the standard operating temperature for a tankless water heater. It is already sufficient for a variety of home applications including as bathing and cooking. In addition, the setting will ensure that the water flowing out of your outlet is precisely correct. It is possible that the tankless unit will restrict water flow in order to achieve a higher temperature setting. As a result, the higher the temperature on your thermostat, the lower your water pressure will be. Some visitors, however, are not here only for the 120°F temperatures. Here’s how to change the temperature to anything higher than the default setting if you require it. This step-by-step guide will walk you through the process of adjusting the temperature of your tankless water heater. Although the information shown on the LED panel may differ from one manufacturer to another, the following are the main functionalities that most units have: Turn the thermostat dial on the control panel of your tank to the on or off position.
  • Press and hold the Priority Function button until it illuminates
  • Press and hold the Arrow Up button until the temperature on the display changes from 120°F to 140°F, then release the button. The figure on the screen will begin to flicker
  • this is normal.
  • Continue to press the Up and Down Arrows together until the light stops flashing.
  • Using the Up and Down arrows, adjust the temperature of the figure to your liking. Some types adjust the temperature by a 5-degree increment in each direction. Other units can be customized to a certain extent
  • Some water heaters, such as the Rinnai Tankless Water Heater, are equipped with a lock feature. If you want to use it, press the Priority and Arrow Up Button simultaneously until the LOC displays on the screen.
  • Alternatively, you can hit the Priority and Arrow Down buttons at the same time and repeat steps 4 and 5.


Can you adjust the thermostat beyond the default setting even if it seems locked?

  • What happens if you are unable to raise the temperature of the heater over its default setting?
  • The electronics within the tank holds the key to resolving this problem.
  • You may, however, require the assistance of an expert who will be able to arrange it for you.
  • When it comes to the POU device, altering the thermostat on the control panel will allow you to independently modify the remote panel next to the water outlet.
  • If you are utilizing a whole-house system, you should be aware of the possibility of scalding.
  • Make certain that the temperature is adjusted correctly, especially if you are using it on toddlers.

Is 140 degrees just right or too hot for a tankless water heater?

  • But what happens if you are unable to raise the heater’s temperature over its factory setting?
  • The answer to this problem can be found within the tank’s electronic circuitry.
  • If you want to set it up correctly, you may need to seek the assistance of an expert.
  • When it comes to the POU device, setting the thermostat on the control panel will allow you to independently modify the remote panel located near the water supply.
  • Keep an eye out for potential scorching hazards if you are utilizing the whole-house system.
  • When using it on youngsters, be certain that the temperature is adjusted appropriately.

Why does it take longer to get hot water with a tankless water heater?

On-demand hot water does not always imply that you will get hot water immediately after turning on the faucet. Even if you have a POU device, it will take a few seconds for your hot water to come to a rolling boil. The waiting time for the water is still determined by the flow of water, the distance between the heater and the pipe, and the outside temperature.

Why won’t my tankless water heater get any hotter?

The temperature outside in your neighborhood may have an impact on the functioning of your water heater. It is also possible that sediment build-up or water hardness is preventing the water from heating up fast. If you are utilizing a large number of outlets at the same time, the temperature of the water will be affected as well.


  • If you need a hot water heater, the tankless choice, as opposed to a tank water heater, is an innovative and highly sustainable item for a domestic water heating system.
  • This system creates hot water on demand, which makes it extremely efficient and cost-effective.
  • Tankless water heaters have a number of advantages over traditional water heaters.
  • One of its disadvantages, on the other hand, is that it is prone to produce water temperatures that are variable.
  • Maintaining a constant supply of hot water may be accomplished by matching the size of your tankless heater to your usual use.
  • Acquiring knowledge on how to set the temperature on a tankless water heater may also be of use in resolving the situation.

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.

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.When purchasing a tankless water heater, there are various considerations that must be made.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 actually distinguishes a tankless water heater from a typical water heater is the fact that they may avoid 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 lying idle in a tank, wasting its heat.
  • Some tankless water heaters are regulated by a thermostat, which allows you to alter the temperature of the water they produce more easily.
  • Another advantage is that they take up less room and are better for the environment because the rusted tank isn’t disposed of in a landfill like conventional tanks.

Your bigger, conventional heaters, with their 30-50 gallon tanks, take up a significant amount of floor area.It is possible to get containers that are 60 inches tall and 24 inches wide that store 40-60 gallons.In comparison, a tankless water heater is around the size of a big computer, which explains why these bad boys are so popular in small houses with little space for storage.The highest temperature rise achievable 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 want to use at the same time (for example, running the laundry 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 finest tankless water heater, you’ll want to aim for a flow rate that meets your requirements.

Low-flow water faucets 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.

Pre-1922 heads have a flow rate ranging from 4.0 to 8.0 GPM.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.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.

Combustion gases are properly vented out of the building using a specialized and sealed vent system.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.The disadvantage of tankless heaters is that their output restricts the amount of water that can flow through them.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.

See also:  How Does A Water Jet Pump Work?

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.

This may be a time-consuming and expensive undertaking.Tankless water heaters might also be more difficult to install than traditional water heaters.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.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.

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.

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.

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.

It is your responsibility to investigate and determine the operating temperature of your heater.Water heaters that have a temperature indicator are available on the market.The problem is that they aren’t always dependable, which may be frustrating.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?

  • It is recommended that you set the temperature of your water heater between 120 and 140 degrees Fahrenheit.
  • If you drop the temperature of your water any further, you run the danger of polluting your water source with bacteria.
  • If the temperature rises beyond 140 degrees, you run the danger of causing serious burns in your house.
  • Temperatures of 120 degrees Fahrenheit are generally suggested for water heaters.
  • Although you should not adjust your thermostat to this degree right away, you should consider doing so.
  • Other factors influence the choice of location that is most suitable for your family’s finances and health.

You should do the following steps before setting or altering the temperature of your water heater, as we’ll outline below:

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.

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.

After that, you may proceed with adjusting your thermostat.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.

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 in

Leave a Reply

Your email address will not be published.