How Much Is A Tankless Electric Water Heater : Electric Tankless Water Heaters

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The Best Electric Tankless Water Heaters of 2021
  • The finest electric tankless water heater for your house has a variety of advantages, including the fact that it is affordable, relatively simple to install, and capable of significantly lowering hot water bills. This comprehensive guide can assist you with the selecting process.
The Best Tankless Water Heater

  • Tankless water heaters heat water as it goes through the device, as opposed to tank-style water heaters, which store a reserve of warm water in their tanks. If you’re looking for a tiny, energy-efficient water heater, check out our assessment of the best tankless water heaters on Amazon, which you can see below.
Top Tankless Water Heaters
  • Tankless water heaters give hot water on demand while using a fraction of the energy that standard storage water heaters use, saving you money on your utility bills. Aside from that, tankless water heaters take up significantly less room in your home due to their small size. Water heaters that are used in the traditional manner store hot water until it is required. Not only is it inefficient, but keeping all of that water always hot and ready to go when it isn’t needed is costly in terms of energy efficiency and electricity costs. Instead of holding hot water, a tankless heater heats the water as it passes through it, using either natural gas or an electric element to do this. It is possible to have water passed through the system at rates ranging from 3 to even upwards of 9 gallons per minute, depending on the tankless water heater that you select to install. Tankless heaters fuelled by natural gas often provide the best performance.
Best Tankless Water Heaters
  • Our team of specialists has narrowed down the top tankless water heaters from among hundreds of different types. As a result of our investigation, we’ve limited the field to models from Stiebel Eltron, EcoSmart, Rheem, and Black + Decker. The Stiebel Eltron tankless water heater was rated “Best of the Best” in our Best Tankless Water Heaters category because of its exceptional quality and positive customer experience. We selected the EcoSmart as our Best Bang for the Buck because of the overall quality and value it offers consumers. Read our entire evaluation to learn about the advantages, disadvantages, and overall rating of each of the models we selected for our top five
The best hot water heaters for your RV
  1. A water heater that provides consistent performance and can provide hot water wherever you are is crucial for any household. That is why we combed through hundreds of listings to identify the finest water heaters ideal for use in recreational vehicles, with the Rinnai V53DeP emerging as our choice due to its compact and energy-efficient construction. Even if you’re on a tight budget, we offer alternatives for you that are both affordable and high-capacity

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Read This Before You Buy a Tankless Water Heater

Consider the following: The method used by the majority of houses in this nation to heat water is ridiculously inefficient. Every year, we fill up large storage tanks of 40- to 50-gallon capacity with water and then continuously pump energy into them to ensure that we have hot water available anytime we want it. But, unfortunately, this is not always the case. The wait for the tank to reheat might be lengthy if a teenager is taking a long shower or the spouse is enjoying a long soak in the tub.

Then there are the niggling concerns such as: Is it clogged with silt that consumes energy? Is there a chance of a leak? Both of these worries are fair given the fact that tanks often fail between 8 and 12 years.

Tankless Water Heater Installation: Is It Worth It?

Investing in a tankless water heater has a number of benefits, as detailed above. It creates hot water just when you use it and for as long as you require it, resulting in a reduction of 27 to 50% in fuel expenses when compared to tank-type heaters. (A typical gas-fired tank wastes 40 to 50% of the fuel it burns, according to the manufacturer.) As a result, there is virtually little danger of a catastrophic leak occurring because there is no tank to collapse. Furthermore, since their introduction in the United States in the 1990s, tankless heaters have become increasingly sophisticated, with features such as built-in recirculating pumps (which provide “instant” hot water) and wireless connectivity, which alerts you via smartphone when a unit requires servicing.

Our tankless water heater guide will explain how they function, what you should know before purchasing one (and before the installation comes), and the idiosyncrasies of how they operate so that you won’t be caught off guard if you decide to go tankless.

How Does a Tankless Water Heater Work?

Doug Adams created the illustration.

  1. It all starts with the first turn of the hot-water faucet (1). A flow sensor (2) detects the presence of water entering the heater and sends a signal to the control panel, causing the heater to begin generating hot water. During operation of a natural-gas-fueled unit, thecontrol panel (3) activates thefan (4), which pulls in outside air, opens the gas valve (5), which allows the gas to flow into the unit, and ignites the burner (6). In order to transmit heat from the flames to water passing through the exchanger’s tubing, a heat exchanger (number 7) is used. The mixing valve (8) regulates the temperature of the superheated water that exits the exchanger. Whenever the temperature sensor (9) detects water temperatures that are too high or too low for the intended setting, the panel will modify the gas valve, the mixing valve, and the flow-regulating water valve (10) in accordance with the results. Ventilation is provided by a sealedvent (11) (or a couple of vents) via a roof or exterior wall, which removes exhaust gases and supplies combustion air to the burner.

Several people were thanked for their contributions: Phillip Maxwell, Residential Product Manager, Rheem; Eric Manzano, Product Training Supervisor, Noritz; Joe Holliday, Senior Vice President, Product and Business Development, Rinnai; and Fred Molina, Water Heater Products Manager, Bosch Thermotechnology

What to Know About Tankless Water Heaters

Thanks to Noritz for the use of his photo.

How Much Does a Tankless Water Heater Cost?

Prices range from approximately $170 for modest gas-fired units to more than $2,000 for high-output heaters that can serve two showers at the same time; $1,000 is a reasonable starting point for most buyers. Electric heaters without a tank range in price from $90 to $900. The expenses of a first-time installation are higher than the price of a simple tank replacement. Electric tankless water heater installation (see item below headed “Installing an Electric Tankless Water Heater”).

How to Install a Tankless Water Heater

This is a work that should be left to the professionals, since it entails creating leak-free water, vent, and gas connections in the case of gas or propane units, or upgrading the wiring and circuit-breaker panel in the case of electric units, and it is best left to the professionals.

Tankless Water Heater Maintenance

Sign up to have a professional do an annual service that includes cleaning or replacing water and air filters, as well as inspecting the burner’s operation. The use of a vinegar flush every 500 hours in places with hard water prevents mineral accumulation, known as scale, from blocking the heat exchanger. That 20-minute task may be completed by a professional or by a homeowner.

How Long Do Tankless Water Heaters Last?

It is expected that gas-burning tankless water heaters would last 20 years or longer, which is two to three times longer than tank-type heaters. Tankless electric units have shorter life lifetimes, ranging from 7 to 10 years, compared to conventional units.

Where Can I Buy One?

They may be found at plumbing supply stores, big-box stores, and internet sellers, among other places.

Alternatively, you may order one via your plumber.

Pros and Cons of Tankless Water Heaters

Thanks to Noritz for the use of his photo.

PRO: They’re Compact

As a result of new federal requirements requiring stronger insulation to decrease standby heat loss, the size of newer tank-type water heaters has increased. Consequently, they may not be able to fit into locations where an older heater with the same capacity might. Tankless gas heaters are approximately the size of a suitcase and are mounted on the wall.

PRO: They’re Safer

A tank-type heater, on the other hand, may leak and spill gallons of water if it springs a leak, but it will not house Legionella germs or topple over in an earthquake. The air supply and exhaust vents are also closed to prevent backdrafting, which would otherwise allow carbon monoxide to enter the house.

PRO: They’re Easy to Winterize

Owners of vacation homes are well aware of how long it takes to drain a water-heating tank prior to closing up a house for the season. An electric compressor may drain a tankless heater in a matter of seconds, after which it can simply be unplugged.

CON: They’re Sensitive to Slow Flow

These devices automatically shut off if there is too much scale accumulation in the pipes, or if the aerators in the faucets and showerheads get blocked, or if a turned-down faucet limits water flow to around 0.3 gpm.

CON: The Payback Takes Awhile

An annual savings of only around $100 for a household using a $1,000 tankless gas heater vs a $400 tank-type heater is possible, depending on how efficient the heater is and how much hot water is utilized. The savings, however, begin to accrue after six years, when many tanks are reaching the end of their useful lives due to the extended lifespan of tankless gas systems.

New Tankless Water Heater Technology

Thanks to Noritz for the use of his photo. The advancement of tankless technology is ongoing. Here are a few of the most recent enhancements:

Higher Efficiency

Condensing gas heaters can extract up to 96 percent of the heat from a fuel, which is a 17 percent improvement over first-generation tankless devices. This is possible because of a second heat exchanger, which collects a large portion of the exhaust heat before it exits the vent. In addition to being around 25% more expensive than noncondensing heaters, condensing heaters produce acidic condensate that must be neutralized. If a heater doesn’t come with a built-in neutralizing cartridge, the installation will have to install one after the fact.

Instant Hot Water

Despite the fact that tankless water heaters heat water in around 15 seconds, you must still wait for the hot water to reach your shower head or faucet, just as you would with a tank-type heater. The recirculation pump should be used when the distance between the heater and the fixture is greater than 50 feet. This will conserve water and minimize the amount of time spent waiting. It is this pump that pushes the cold water in the pipes back through the heater. The pump can be activated by a timer, a push button, a motion sensor, a smart speaker, or a smartphone (see illustration above).

Wi-Fi Compatible

Tankless systems with digital connectivity let you to control the temperature as well as monitor gas and hot-water use from your mobile device. Furthermore, the device is capable of identifying the cause of a problem.

Please communicate this information to your plumber so that he or she may arrive on the job site knowing exactly what has to be done. This function also eliminates the need for any guessing when it comes to determining when it is time to descale.

Tankless Water Heater Rebates: A Great Way to Save

Carl Tremblay captured this image.

What Size Tankless Water Heater Do I Need?

Here’s how the specialists ensure that your water heater produces adequate hot water: 1. A large burst of BTUs is required for a tankless heater to convert cold water into hot water in a matter of seconds. However, if a heater’s Btu output is insufficient to meet demand, it will reduce the flow rate or, in the worst scenario, offer tepid water. A plumber considers three aspects when determining whether or not a heater will be able to satisfy the demands of a household:

  • The temperature of the water that enters the heater
  • The maximum demand for hot water expressed in gallons per minute (gpm)
  • The efficiency of the heater, as shown by its Uniform Energy Factor, which may be found in the product specifications
  1. The first step is as follows: A professional determines how many Btus per gallon of water heater is required to increase the incoming water temperature to 120 degrees (see the map on the next slide)
  2. Flow rates for all of the appliances and fixtures that may be consuming hot water at the same time are added together to form peak demand, which is calculated as follows: (These rates are detailed in the next slide.) As a result of not bathing or washing in 120-degree water, we save around 20% on our overall use. Water-saving fixtures and appliances, as well as delaying laundry while the shower is in use, can help you minimize peak consumption. In the calculation, the total Btu production is computed by inserting the Btus-per-gallon and peak-demand amounts in at different points along the way. If the difference in output is between two models, go with the one with the greater Btu rating to save money. You’ll also need two smaller units that function in tandem if your output is greater than 198,000 Btus, which is the limit for domestic gas heaters.
See also:  How Much Is A Water Filter

Btus Output Estimate

Not interested in completing the calculations? Make a rough estimate of how much heater output you’ll want using these statistics.

  • The following figures are for one bathroom for one to two people: 140,000 Btus
  • Two bathrooms for two to three people: 190,000 Btus
  • Three bathrooms for three to five people: 380,000 Btus

Btus Per Gallon by Region

  • Kitchen or bath faucets should flow at 1.5–2.2 gpm
  • Tub filler faucets should flow at 4 gpm
  • Dishwasher: 1–2.5 gpm
  • Washing machine: 1.5–3 gpm
  • Showerhead should flow at 1.25–2.5 gpm

How to Determine gpm?

Kitchen or bath faucets should flow at 1.5–2.2 gpm; tub filler faucets should flow at 4 gpm; Dishwasher:1–2.5 gpm; Washing machine:1.5–3 gpm; Showerhead should flow at 1.25–2.5 gpm;

Electric Tankless Water Heater Facts

Thanks to Stiebel and Eltron for their assistance. In addition to gas lines and propane tanks, tankless water heaters operated by electricity can provide the benefits of on-demand hot water to homes that do not have them. Compared to gas or propane tankless heaters, these systems, which heat water using thick copper rods, are significantly quieter and roughly a third smaller in size. And because they do not require vents, they can be fitted practically anyplace, even beneath sinks and in small closets, without compromising performance.

In locations with warm groundwater, that amount of hot water may be sufficient to feed a whole house; but, in colder climates, they are better suited to point-of-use service, where the demand for hot water does not become excessive.

Furthermore, electric heaters have a lifespan that is approximately half that of gas heaters: Warranty periods typically range from three to five years.

Tankless Water Heater Installation

Doug Adams created the illustration. What you and your plumber should look for before the installation day is as follows:

Gas Line

If you want your tankless heater to work effectively, you must connect it to a gas supply line that supplies enough volume at a high enough pressure to run the burner. In many circumstances, this will need increasing the diameter of the supply pipe to 3-4 inches in diameter. Furthermore, if the pressure is insufficient, the gas provider will be required to change the regulator on the meter. For your information, some tankless systems, like as ones manufactured by Rheem, are capable of working with a regular 12-inch gas line as long as it is not more than 24 feet in length.


Tankless gas heaters that do not condense employ stainless-steel vents that can resist high exhaust temperatures. Condensing systems feature a cooler exhaust and use PVC pipes, which are less costly than other types of exhaust. Installing a concentric vent, which has an exhaust pipe inside a larger air-intake pipe, is easier than installing a traditional vent since only one hole in the wall needs to be made.

As a point of reference, vent runs have traditionally been limited to a maximum of 10 feet. However, more powerful fans, such as those found in Rinnai’s Sensei series, now enable vents to be extended up to 150 feet.

Water Hardness

Heat transmission is slowed and water flow is restricted when scale deposits accumulate in a heat exchanger (or on electric heating components) over time. If you currently have whole-house water softening, scale will not be an issue for you. However, if your water is not being softened and its hardness surpasses 120 milligrams per liter, it is worthwhile to invest in a treatment system to remove the hardness. For your information, a specific, point-of-use cartridge, such as the TAC-ler water conditioner (Stiebel Eltron), can be used to change the hardness of water without the use of salt or other chemicals.

Outdoor Tankless Water Heater

Matt Risinger captured this image. If your environment and local rules allow it, think about the advantages of hanging a heater outside in the winter.

  • Saves space: You won’t have to create place for another appliance in your home as a result of this. Installation is straightforward: Because of the built-in exhaust vent, there is no need to drill a large hole (or two) through the side of the building. Service is simple: A plumber may come to your home at any time, whether or not you are there. However, take in mind the following: Regulations governing construction: If you want to install it outside, you may require approval from your local building department. Weather conditions that are cold: Even at temperatures as low as 22 degrees Fahrenheit, internal heaters keep components warm, but exposed water lines must be insulated and covered with heat tape that activates automatically in freezing conditions. Southern states are less concerned about frozen pipes than those located north of the Mason-Dixon Line.

Tankless Water Heater Venting

Carl Tremblay captured this image. Are you in need of assistance with repairs around your home? A house warranty may be of assistance. The This Old House Reviews team has put up some in-depth guidelines that you can read here:

  • Home warranty providers that are the best
  • Reviews of American Home Shield, AFC Home Club, Select Home Warranty, and Choice Home Warranty are all available.

Tankless Water Heaters Cost Breakdown & Buyer’s Guide

The most recent update was on February 21, 2022. When purchasing a new on-demand hot water system, the price will vary depending on a number of factors, including the fuel type, system size, and any extra wiring or piping improvements that may be necessary. While the initial cost of installing tankless hot water may appear high when compared to standard tanked water heating solutions, the long-term savings associated with installing tankless hot water may frequently more than compensate for the initial investment.

How much does a tankless water heater cost?

While tankless water heater prices can range anywhere from $170 to $2,000, on average, you should expect to pay something in the neighborhood of $1,000 dollars. In the case of small gas-fueled tankless water heaters, you may pay as little as $170, but for larger units that can deliver water to numerous appliances at the same time, you could pay as much as $2,000 or more. The type of fuel used in a tankless water heater has the greatest impact on the initial cost of the unit. As a general rule of thumb, gas-powered hot water systems are often two to three times more expensive than electric alternatives.

In order to purchase and install an entire home tankless water heater fueled by natural gas, you may expect to pay up to $3,000 in equipment and installation costs.

Electric units are normally around $600, while gas units are often around $1100.

In this post, you will learn more about your tankless water heater alternatives as well as how to compare them.

Factors that determine your tankless water heater cost

There are several elements that influence the overall cost of installing a tankless hot water system, including the type of fuel you use, the size of your equipment, and its overall condition.

Fuel type

A tankless hot water system can be powered by either natural gas or electricity, depending on your preferences. Typically, gas-powered units are two to three times more expensive than electric units, although the price difference can vary depending on a variety of other factors. Consider the price of gasoline as one element to consider. It is true that electricity is a slightly more expensive fuel for a tankless hot water heater when compared to natural gas, but it is also true that regardless of the fuel type that you choose, you will most likely pay a similar amount for fuel throughout the lifetime of the system because the differences in fuel costs are small.

With one additional wrinkle: it is projected that the price of natural gas would rise at a faster rate than the price of electricity, implying that electric units will only become more economically beneficial over the long term.

System size

It is also vital to take into consideration the system size, which relates to how much hot water can be produced by a certain tankless water heater and hence how much it will cost. In order to evaluate system sizes amongst on-demand water heaters, the easiest method to do so is to look at their gallon per minute rating, also known as GPM. In general, the greater the GPM, the higher the expense of your equipment will be to operate. Your required gallon per minute is determined by the number of appliances you need to operate at any particular time period.

For two bathrooms, the flow rate is 8-9 GPM, and for three or more bathrooms, the flow rate is 9-11 GPM.

GPM ratings for tankless water heaters are provided by the manufacturers and are generally found on the box, however this is a best-case scenario statistic that should not be taken out of context without further investigation.

Continue reading our tankless water heater comparison post to learn more about how to choose the best tankless water heater for your needs based on the genuine GPM it produces.

Installation complexity and additional upgrades

In most cases, tankless water heater installation costs range from $800 to $3,500 on average. Additional installation expenses might raise the price of your initial purchase. For example, if you want an electrician to rewire your home systems in order to accommodate an energy-intensive electric equipment, you may be required to pay them up to $100 per hour for their services. For example, if you want the services of a home contractor to update your gas lines (which may cost as much as $750), the amount you pay up front will cover more than just the cost of water heater equipment and standard installation.

Using a point-of-use system against a whole-house system Tankless water heaters are available in a variety of sizes depending on whether the equipment is a “point-of-use” type or a “whole-house” one.

Point-of-use systems are more frequently fueled by electricity than by natural gas. Point-of-use solutions can be more effective in protecting against hot water shortages in some big homes with significant hot water use.

Tankless water heater rebates and incentives

Unfortunately, the federal tax credit for household energy efficiency measures (which included gas-powered tankless water heaters) expires in 2016, making tankless water heaters no longer eligible. Certain governments and utilities, on the other hand, have their own rebate and incentive programs for customers who switch to on-demand hot water. For example, the Mass Save program in Massachusetts provides a reimbursement of up to $700 for the installation of a tankless gas water heater that has been certified by the ENERGY STAR and meets specific efficiency requirements.

Financial benefits of tankless water heaters

On-demand water heaters, according to the Department of Energy, can be anywhere from 8 percent to 50 percent more efficient than typical storage tank water heaters, depending mostly on your water consumption patterns and system type (point-of-use vs. whole-house). This is due to the fact that, in contrast to tank storage systems, only a little amount of water is ever heated and left unused. When it comes to using on-demand hot water, the most effective method is to install separate point-of-use devices at each hot water faucet in your home.

With a tankless water heating system, you can always save money on water heating, regardless of how efficient your individual system is.

If you want to understand more about how tankless water heaters may effect more than just your money, see our article on the advantages and disadvantages of tankless water heaters.

Calculating your payback period with tankless hot water

How long does it take for a tankless hot water system to pay off its initial investment? While you will begin saving money on fuel expenses immediately after installation, the somewhat higher upfront cost of tankless water heaters as compared to storage tank systems means that it will take several years before you “break even” on your investment in a tankless water heater. An investigation by Consumer Reports found that the payback period for tankless water heaters can range from 12 years to 27.5 years, with electric versions at the lower end of the spectrum and gas units nearer to the top of the spectrum.

Environmental impact of tankless water heaters

In addition to the economical advantages of installing an on-demand water heater, updating your property’s hot water system has favorable environmental consequences that should be taken into consideration. Traditional tank-style water heaters are less energy efficient than tankless water heaters, which means that you’ll require less fuel to heat your water. This translates into less electricity being generated from fossil-fuel power plants like as coal, natural gas, and oil, which helps to reduce the amount of greenhouse gas emissions and other pollutants entering the environment.

Solar panels installed on your roof allow you to power your electric water heater (as well as the rest of your home) with free, zero-emission electricity generated by the sun.

As a result of combining your home water heating system with locally generated solar power, you may save money on heating your house’s water supply while also decreasing your dependency on fossil fuels.

Tankless Water Heater Cost: Gas & Electric Prices 2022

This page may contain affiliate links, so please keep that in mind. If you purchase a product or service after clicking on one of these links, we will get a commission at no additional cost to you. See our product review method in further detail, or read our FTC affiliate disclosure for more information. Tankless water heaters are more expensive up front than traditional storage water heaters, resulting in a larger price tag and more expensive installation costs. However, operational costs are significantly lower as a result of virtually nil standby losses, which will result in significant savings in the long term.

See also:  How Long Does It Take For A 50 Gallon Water Heater To Fill Up

So, are tankless water heaters a good investment in the long run?

Discover all you need to know in our comprehensive guide below!

  • In a nutshell, the following are the cost reasons for tankless water heaters: The cost of a tankless water heater
  • Tankless water heater installation costs on average
  • Costs of operation and maintenance on a yearly basis
  • Whether tankless water heaters are a good investment or not. The best place to purchase a tankless hot water heater

In a Nutshell

Please remember that the majority of the data on this page are estimates! Installing a new tankless water heater with installation can cost anywhere from $250 to more than $5,000 USD, depending on the extent of the job and who you ask. Because this is obviously not very useful, let us break it down a bit more specifically:


Note that the statistics on this page are just estimations, so please keep that in mind. Depending on the nature of the job and who you speak with, a new tankless water heater, including installation, can cost anywhere from $250 to more than $5,000 US dollars. Now, clearly, this is not very useful, so let’s break this down a bit more specifically:

Tankless Water Heater Cost Factors

What is the cost of a tankless water heater? Answering this question is not as simple as it may appear at first glance. Due to the fact that there are a range of tankless water heater cost considerations to take into account, this is the case. They are as follows:

  • Type of system (fuel type, point of entrance or point of usage, and so forth)
  • Size of the unit (the number of gallons of hot water that may be delivered per minute)
  • The Energy Factor (EF) is a measure of energy efficiency. Features that are unique
  • The length and breadth of the warranty on replacement components
  • Brand

Whole House vs. Single Point

Obviously, the distinction between a whole-house system and a single point of use (POU) system is significant. A tankless water heater that provides hot water for the entire house must be significantly larger than a one that merely provides hot water for a single faucet or shower. In comparison, POE electric tankless water heaters have between 10 and 35 kW of power, whilst a POU unit may have no more than 3 kW of power.

Gas Fired vs. Electric Heaters

Tankless gas units are often more expensive than their electric counterparts, according to industry standards.

Natural Gas vs. Propane

When it comes to the initial purchase price of a water heating system, the choice between natural gas and propane makes little difference. Naturally occurring gas is less costly than other energy sources. propane is more energy efficient than natural gas at the same time.

Oil and Solar Water Heaters

We wanted to include tankless water heaters that are powered by oil and solar energy for the sake of completeness. They are both extremely rare and in the same price range as gas-fueled water heaters, which is a good thing.

Tankless Water Heater Prices

  • Small point-of-use systems start at a little more than $100 USD and go up from there. When equipped with 35,000 BTU (BTU is an abbreviation for “British Thermal Unit” and is used to measure a system’s heating power), they can deliver 1.5 to 2 gallons of water per minute
  • The largest residential whole house tankless gas water heaters can deliver up to 199,000 BTU and deliver up to 10 or 11 gallons per minute. Cost: Approximately $2,000 USD
  • Most tankless gas devices cost between $500 and $1,200 USD and have maximum flow rates ranging from 6 to approximately 11 gallons per minute. From 70,000 to 199,000 BTU, there are several options.

Rinnai is the manufacturer of our number one whole house gas tankless water heater.

  • Extremely high quality
  • Unlimited hot water for homes with up to 212 bathrooms (maximum flow rate of 6.5 gpm)
  • There are options for both natural gas and propane
  • Full remote control is available using a mobile application.

Marey GA10LP Power is intended for point of use.

  • Excellent price-performance ratio
  • Flow rates of up to 3.1 gpm are ideal for point-of-use applications. Installing it almost anywhere is simple because it is small and takes up little space. Allows you to customize the flow of gas and water to meet your specific requirements. Warranty of five years

Electric Tankless Water Heater Prices

  • Approximately $100 USD is the cost of the smallest POU electric tankless water heater. Their highest rated water flow is 3 kW, and their maximum power output is 3 kW. 5 to 1 gallon per minute is the flow rate. In this price range, some electric tankless water heaters are intended for 120 V power sources, although most require a 240 V power supply
  • The most powerful and most costly home electric tankless water heaters cost between $800 and $900 USD. With a maximum flow rate of 6 gpm and a power output of 36 kW, they can provide enough water for whole households
  • Most electric tankless systems are priced between $200 and $600 USD. Flow rates range from 2 to 6 gpm at their maximum. Power output ranges from 11 to 36 kW.

Stiebel Eltron is the manufacturer of one whole-house electric system.

  • Excellent performance
  • Large enough to feed two showers
  • Many different sizes available
  • Simple temperature control
  • Water heater is quite quiet
  • Many different sizes available Maximal energy efficiency is achieved by self-modulation (EF = 0.99).

Rheem RTEX-13 is intended for point of use.

  • A single bathroom or weekend cabin would be ideal for this unit, which is self-modulating to save energy. It is simple to adjust the output temperature by using the dial control. Design that saves on floor space
  • Warranty of five years

Want to go electric but haven’t settled on a specific model yet? We can help. Here’s where you can find the greatest electric tankless water heater! Alternatively, you can refer to this link for our size reference.

Commercial Tankless Water Heater Prices

Whether you need 240,000 BTU or 380,000 BTU or more, the cost of a business tankless water heater can go into the thousands of dollars, depending on your unique needs. As a result, it makes little sense to discuss projections at this time. We propose that you get in touch with a handful of vendors in your region and work your way up from that point.

Price Comparison by Brand

BrandModel Price Range
Ecosmart $140-500 USD
Rinnai natural gas fired tankless heaters $700-2,100 USD
Rinnai propane gas fired tankless heaters $700-1,900 USD
Rheem electric $170-500 USD
Rheem gas fired tankless heaters $500-2,000 USD
Bosch ProTL 175N $1,200 USD
Bosch Tronic 3000 T $150 USD
Stiebel Eltron Tempra Plus $500-850 USD
Camplux CA528 $450 USD
Noritz NRC66DVNG $800-900 USD
Rinkmo 18KW 240V $350 USD

Average Tankless Water Heater Installation Cost

Electric water heaters are less difficult to install than gas water heaters. This is due to the fact that the latter requires release. In the event that you need to rewire your home or improve the electrical system in order to satisfy the amperage needs of your new electric water heater, this may be a different situation. In addition, it matters if you are only replacing an old heater, which means that most or even all of the plumbing connections and other components are already in place; if you plan to switch fuel sources; whether or not you need to make any modifications in order to meet plumbing or electrical codes; and whether or not you want to upgrade from a tank-based to an on-demand heater.

Aside from the fundamentals of labor, there are a number of other considerations:

  • The costs associated with equipment, components, and accessories (mounting hardware, pipes, valves, fittings, etc.)
  • And Cost of a permit – In most areas, permits are necessary for the installation of a new water heater. For further information, contact the municipality or city where you live. Warranty on labor for a specified period of time and within a specified scope

Example 1: Gas Tankless Water Heater Costs

(Tip for mobile users: Swipe to scroll.)

Scenario Labor Material Total Cost
Full installation (mounting, hot and cold water connections, gas line, venting) About 8 (10) hours Copper/flex piping, gas piping and kit, vent piping and kit, valves, fittings, mounting hardware, … $1,000 – $1,700 USD
Replacement of old tankless unit, already existing gas line + venting can be used 3 – 4 hours Gas kit, vent kit, valves, fittings, mounting hardware, … $200 – $700 USD
Other Cost Factors Pricing
Upgrade to larger gas pipe diameter ~$500 USD
New venting system $150 – $600 USD
Removal and disposal of old water heater $100 – $300 USD

Example 2: Electric Tankless Water Heater Costs

(Swipe to scroll on a mobile device.)

Scenario Labor Material Total Cost
Full system installation (cold and hot water connections, electrical connection) 2 – 5 hours Copper/flex piping, valves, fittings, mounting hardware, … $150 – $750 USD
Replacement of old water heater, already existing water lines can be used 1 – 3 hours Valves, fittings, mounting hardware, … $150 – $250 USD
Other Cost Factors Pricing
Outlet must be installed and wired back to electrical panel $100 – $200 USD
Home rewiring $,$$$

Cost to Remove or Replace a Tankless Water Heater

When it comes to tankless water heaters, removing or replacing an existing unit should not be prohibitively expensive in most situations. That being said, just like with standard system installation, the cost of replacing a tankless hot water heater is highly dependent on the specifics of the situation.

Hiring a Pro

Although it is hard to cover every conceivable case here, calling three or four firms in your region and asking for pricing estimates is generally the best course of action to take. Pro tip: Look for contractors who are licensed and insured, who have been in business for a number of years, and who provide a warranty on their work and materials. A service provider with an A+ rating on the Better Business Bureau website and other directories is also a solid sign of their reliability.

Yearly OperatingMaintenance Costs

Obviously, depending on the sort of tankless water heater you have, gas or electricity will be the primary source of your operational costs. In addition, the more hot water you use, the higher your utility expenses will be in the future. Which is more cost-effective: natural gas or electric power? As a general rule of thumb, a gas water heater will be around one-third less expensive to operate than an electric model, however this may vary depending on your local electricity costs. Another important consideration is temperature increase, which is dictated by the temperature of the input water as well as the temperature settings at the output.

There isn’t much you can do about the temperature of the inflow water other than relocate to a warmer region. It is possible, however, to change the thermostat on your water heater to the lowest output temperature that you are comfortable with.

PropaneNatural Gas Prizes

The cost of operating a gas tankless water heater ranges from less than $200 USD per year to more than $500 USD per year depending on the model. Only a tiny role is played by the efficiency of the system. Natural gas is the least priced choice because it is powered by a utility supply line. In contrast, propane is a more efficient fuel with a significantly greater BTU, but it must be purchased separately from the rest of the fuel. Prices for natural gas and propane vary depending on where you live.


Electric tankless water heaters have an annual operating cost that can range from less than $100 USD to more than $300 USD and even more. It is possible to overlook the effectiveness of a system.

Tankless Water Heater Maintenance Cost

When it comes to maintaining a tankless unit, all that is required is periodic descaling (also known as deliming) and flushing of the heating components to keep it operating at optimal performance. This is normally required once every 12 months, depending on the hardness of your water and how much water you consume. As a point of reference, if you have a water softener placed upstream of your instant hot water heater, you won’t have to bother about descaling. Furthermore, the methods needed are not extremely hard, so you may complete this task on your own to save a few dollars.

It takes 1 to 2 hours for a plumber to do routine maintenance.

Are Tankless Water Heaters Worth the Investment?

As previously stated in the introduction, a tankless water heater is a more expensive upfront expenditure when compared to a typical water heater. However, it reduces recurring expenses by a significant margin since it has virtually no standby losses – in contrast to storage tank systems, which heat water around the clock. According to the United States Department of Energy, on-demand water heaters can be up to 30 percent more energy efficient than traditional water heaters, depending on how much hot water you consume on a daily basis.

Are they worth the money?

Average Cost Savings

“Water heating is the second most energy-intensive end-use in the home (.).” It accounts for 16.8 percent of home energy usage and can cost a household anywhere from $200 to $600 per year,” according to the Energy Information Administration. (Image courtesy of the Internet Archive) When moving from a gas tank-based to a gas tankless water heater, a typical family of four consuming 64 gallons of hot water per day may save around $115 USD each year. In the case of high hot water consumption (about 85 gallons per day), energy savings of 8 – 14 percent are achievable.

With electric heaters, the average cost reductions are a little smaller, but the upfront expenditures are also a little less. Overall, tankless water heaters have a relatively lengthy payback period of around 20 years, which is approximately the same amount of time that the average system lasts.

Tankless Water Heaters – Pros and Cons

What are the advantages and disadvantages of putting up a tankless water heater in your home?

See also:  How Much Does A Tankless Hot Water Heater Cost


The following are some of the advantages of tankless water heaters:

  1. When compared to standard water heaters, they are more energy efficient than those. This is due to the fact that they do not hold any hot water, therefore eliminating standby losses. The heating takes place instantly, allowing you to save up to 30% on energy costs. Heating water on demand also ensures that you will never run out of hot water. Tankless water heaters provide an infinite supply of hot water since they are tiny and therefore easier to install in confined spaces. Having a new water heater will also free up room in your basement or wherever you decide to install it. They are simple to prepare for the next winter season. As previously said, a tankless water heater may last up to 20 years, but a standard water heater with a tank can only last 15 years.


The following are some of the disadvantages of tankless water heaters:

  1. Both the purchase and the installation are more expensive in the beginning. As a result, the payback period is lengthy
  2. Tankless water heaters are susceptible to sluggish flow
  3. Electric tankless systems are restricted in terms of the amount of hot water they can produce at any given moment. However, even the largest units designed for residential usage are unable to heat more than 6 gallons per minute under optimum conditions.

Where to Buy a Tankless Hot Water Heater

Where is the most convenient location to purchase a new tankless water heater? Of course, we always prefer to shop online, for example at Amazon or Home Depot, in order to get the greatest deal possible. However, most manufacturers also sell their hot water heaters through local dealers and/or licensed contractors, which is a common practice in the industry. Home improvement stores and big-box retailers are another feasible choice. If you have any queries concerning the price of a tankless water heater, please don’t hesitate to ask them in the comments section below!

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How Much Does A New Tankless Water Heater Cost?

We at Bankrate are dedicated to assisting you in making more informed financial decisions. Despite the fact that we adhere to stringent guidelines, this post may include references to items offered by our partners. Here’s what you need to know about There are few things in life that are more unpleasant than taking a hot shower only to be met with water that is so cold it seems like it has come straight from a melting glacier. A tankless water heater is one method to ensure that you never again have to take a cold shower when you least expect it.

The entire cost is determined on the model selected as well as whether or not your home requires retrofitting.

Tankless vs. traditional

Understand the differences between tankless and regular water heaters may be easier if you look at this chart. A typical water heater warms and stores water in a tank with a capacity of 30 to 50 gallons, depending on the manufacturer. The heated water remains in the tank until it is required, and when it is consumed, the tank is refilled and the preheating process is repeated. A tankless water heater heats water on demand by using either electricity or natural gas as a fuel source. As a result, as soon as you switch on the dishwasher or step into the shower, the water that is required is heated at the source and is instantly available for use.

Check out our guide to obtaining the best rate on a home equity line of credit.

Electric or gas?

A tankless water heater has a price tag of around $1,500.

The answer is dependent on whether you opt for an electric or a gas-powered type of the vehicle. The following are some variables to consider while deciding between the two options:

  • There is a one-time fee. For $500-$700, you can have an electric model, while for $1,000-$1,200, you can get a gas model. Cost of installation: The cost of installing the device and upgrading utility hookups is between $1,000 and $2,000, depending on local expenses and the amount of work that has to be done. Gas versions require the installation of a safe ventilation system, whereas electric ones do not, making the installation of gas models more expensive. Cost of utilities: Gas may be less expensive to run than electricity depending on the cost of utilities in your location. Gas-powered machines require yearly maintenance, but electric-powered units are not required. An electric tankless water heater has no negative influence on the environment since it emits no greenhouse gases and is easy to recycle at the end of its useful life.

Benefits of a tankless water heater

A tankless water heater consumes 30 to 50 percent less energy than a traditional water heater, resulting in annual savings of more than $100 for the average household on heating bills. Instead of wasting 30 percent of its energy, a tankless water heater wastes just 5 percent, according to Energy Star. Although you may have to wait a few seconds for the water to heat up at the source, a tankless water heater ensures that you will never run out of hot water in your home. A tankless water heater is more compact and takes up less space than a standard water heater.

Lastly, a standard water heater has an average lifespan of eight to ten years, but the average lifespan of a tankless water heater is closer to twenty years.

Disadvantages of a tankless water heater

A tankless model is more expensive to buy and install upfront than a traditional water heater. In fact, depending on the unit and how much retrofitting your home requires, it can cost up to twice as much. Due to theexpertise required, it can take up to 10 hours to install. It takes longer for hot water to be heated and delivered. You may experience what is called a “cold water sandwich,” which occurs when the hot water is turned on but has not had time to heat. Hard water causes malfunctions in tankless units, and manufacturer warranties do not generally cover the damage caused by hard water.

The final word

It is possible to use a tankless water heater when rebuilding your house or building a new one, or while staying at home on a part-time basis and do not want to be concerned about a leaky hot water heater while you are gone. Unless you have professional-level installation abilities, installing a tankless water heater is not a do-it-yourself effort. Despite the fact that they can be purchased online or at your local home improvement shop, it is better to leave installation to the professionals because it may be necessary to adapt your home in order for the water heater to function effectively.

It is possible that a tankless water heater will be less expensive in the long term when yearly energy savings and the fact that you will only have to replace it half as frequently as a standard unit are taken into consideration.

Tankless Water Heater Cost Guide 2021 – Installation, Replacement and Operating Cost

The price of a tankless water heater is composed of three components:

  • The price of a tankless water heater
  • The cost of installing a tankless water heater
  • And the operating costs.

Here’s a high-level summary. Following the overview, you’ll find detailed information on each cost kind. Tankless Water Heater Price Information Electric tankless water heaters are available for as little as $125. The price of a whole-house electric tankless water heater starts at around $1,000. Gas tankless water heaters start at around $125, while high-quality, long-lasting gas tankless versions start at approximately $500 and can cost more than $2,000. Installing a tankless water heater can cost you money.

It costs between $600 to $1,500 to install a natural gas water heater.

Operating Expenses / Energy Expenses This cost represents the cost of electricity used to power the water heater.

Gas water heaters have an annual operating cost ranging from $200 to $600, depending on their size and energy efficiency.

Tankless Water Heater Costs

The costs of gas and electric tankless water heaters are shown in this table by size.

Gas Heater Size / BTUs Gas Heater Cost Range
120K – 140K BTUs $500 – $1,200
160K BTUs $750 – $1,600
180K BTUs $900 – $1,900
190K – 199K BTUs $1,000 – $2,200
Electric Heater Size / kWs Electric Heater Size / kWs
Less than 6kW $100 – $225
6-8kW $175 – $250
10-12kW $215 – $390
15-18kW $365 – $550
21-24kW $400 – $635
27-30kW $425 – $715
32-36kW $435 – $800

The expenses of installation are described further below. Factors affecting costs include: Tankless Water Heaters are a type of water heater that does not require a tank to be filled with water. The cost of a tankless water heater, whether gas or electric, is determined by a variety of factors, some of which are evident and others which are less so. Gallons per minute (GPM) flow rate is defined as follows: When all other things are equal, the higher the cost of the unit will be the greater the amount of hot water it can provide.

When it comes to electric versions, GPM is expressed as a factor of kilowatts.

  • Electric point of use (POU) models range in size from around 0.6 GPM to approximately 2.0 GPM
  • Electric whole home versions range in size from approximately 3.0 GPM to more than 5.0 GPM. The flow rate of gas tankless water heaters ranges from around 5.5 GPM to more than 10 GMP.

Observations on the maximum flow rate and entering water temperature: As this chart illustrates, the coldest ground water temperatures vary dramatically depending on climate. It is only when the incoming water is suitably warm that a tankless water heater may attain its maximum flow rate of 1 gallon per minute (GPM). As the temperature of the entering water rises, so does the amount of heat that is required, resulting in a decrease in the GPM output rate. For example, a water heater capable of delivering 5.0 GPM in Florida may only be capable of delivering 2.5 GPM during the winter in Michigan.

  1. Another point to consider while setting the thermostat: The higher the temperature is set, the lower the flow rate will be.
  2. 2: Units of varying quality: The quality of the units varies greatly.
  3. When comparing models, make sure to look at the warranty details.
  4. Gas tankless water heater efficiency begins at around 82 percent, or.82 UEF, when using natural gas as fuel (uniform energy factor).
  5. Using a secondary heat exchanger to increase efficiency results in a cost increase due to the additional equipment required.
  6. outside (only for gas): Indoor units are more expensive than outdoor units because they must be fitted with connections to connect to a ventilation system.
  7. This has an impact on the cost of installation as well (details below).
  8. These pumps boost the unit cost by $300 to $500 and also increase the cost of installation.

Take a look at our article. Is Investing in a Recirculating Pump a Good Investment? 6th and last feature: WiFi capabilities, wireless remotes, and wall thermostats are examples of additional features that drive up the price of gas and electric versions, respectively.

Tankless Water Heater Installation Cost

The expenses of installation for each kind of water heater are included in this table. Cost considerations are explored in further detail below the table.

TypeInstallation Installation Cost Range
Electric 110V $150 – $300
Electric 110V plus outlet $250 – $500
Electric 220V $300 – $600
Electric 220 plus outlet $500 – $750
Gas indoor $600 – $1,000
Gas indoor plus vent $900 – $1,500

Installation Cost Factors

The cost of installing a tankless water heater ranges from $150 to $1,500 dollars. The factors are as follows. The following questions must be answered: 1: Whether an outlet must be placed and wired (electric only): Installing an electric tankless unit is simple as long as there is a 110-120V outlet accessible to connect the unit into for power. When an outlet must be built, the cost increases. 2: 110V versus 220V (Electricity): The same situation arises for 220-240V units as for 110V ones. Adding an outlet and wiring it back to the electrical box, maybe with the inclusion of one or more circuit breakers, increases the cost of the project.

  • 4: Indoor vs.
  • Installing in a crawlspace, attic, or other difficult-to-access and work-in area will raise the cost of installation.
  • It may also have an influence on the amount of installers in your region.
  • Seventh: Recirculation pump (gas): Installing and wiring a recirculating pump involves time and resources.
  • There are a variety of recirculation systems available.
  • We’ve created aGuide to Tankless Recirculating Pumpswhere you can learn about the benefits, drawbacks, and pricing of tankless recirculating pumps.

Tankless Water Heater Operating CostsFactors

As previously stated, the following are the expenses of energy:

  • Electric tankless water heaters may cost anywhere from $75 to more than $300 per year, while gas tankless water heaters can cost anywhere from $175 to $500 per year.

Hydronic tankless water heaters range in price from $75 to more than $300 per year, whereas gas tankless water heaters range from $175 to $500 per year.

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