How Much Does It Cost To Replace A Hot Water Heater With A Tankless

Learn how much it costs to Install a Tankless Water Heater.

Published on the 10th of January, 2022. Cati O’Keefe, Expert Home BuildingSustainability Contributor, has reviewed this article. HomeAdvisor has contributed to this article.

Tankless Water Heater Cost

Installation of a tankless water heater costs around $2,317, or between $1,196 and $3,446, depending on labor rates. Tankless model costs vary according on the manufacturer, model type, and flow rate. Comparing estimates from local contractors is the most efficient approach to plan a budget for a new tankless water heater. Inquire with your local professional to see whether your tankless system qualifies for a tax refund. If these devices are installed and linked appropriately, they have the potential to save you money in the long term.

They will have the knowledge and skills to accelerate the installation while also ensuring that it is done correctly.

Tankless Water Heater Cost Calculator

Let’s run some numbers to see what the costs are. What part of the world are you in? What part of the world are you in?

National Average $2,317
Typical Range $1,196 – $3,446
Low End – High End $350 – $5,200

The cost information in this report is based on real project costs provided by 2,690 HomeAdvisor users.

Tankless Water Heater Installation Cost

A professional might charge either an hourly rate or a flat price, depending on the services provided to the customer. Installing a tankless water heater will cost you between $45 and $150 per hour on average, depending on how long it takes. Final labor costs range from $100 and $450 on average.

Cost Factors

Labor and the sort of heating equipment you pick are the two most important cost elements to consider. Consumers will also need to figure out how much material and labor will be required for the appropriate pieces. Typical accessories required include the following:

  • Termination vent kits range in price from $40 to $100
  • Gas connector kits range in price from $20 to $35
  • And a two-piece lead-free brass valve set ranges in price from $60 to 110. Fittings and mounting hardware range from $10 to $30
  • Insulation and pipe are priced at $10 per foot.

Other costs to consider include the removal and disposal of the existing heating system, electrical upgrades, additional insulation, and possible structural changes to make room for the new unit.

Get a Quote for Your Tankless System

The sort of equipment you choose will have a significant impact on the overall cost of your project. Single-point electric units cost around $150 apiece, and a high-end gas model for the entire house may cost more than $1,500.

Tankless Type Average Unit Cost
Natural Gas or Propane $1,000 – $1,500
Electric $500 – $1,500
Solar $1,400 – $6,000

First and foremost, you must determine what sort of unit you will require.

  • Noritz gas tankless unit with a BTU output of 199,000: A typical family with many bathrooms will be able to get by with this amount. It might take up to ten hours to complete the installation. Installation of suitable ventilation to avoid carbon monoxide poisoning, as well as the modification of the size of gas lines and fittings, will be more expensive in terms of labor. Model with an electric motor and a point-of-use interface: This is something that can be fitted under the sink. Installation takes an average of about two hours. It is necessary to have an electric timer, an outlet, and supply lines.

Whole House or Single Point

Unit with 199,000 BTUs of Noritz gas and no tank: In a typical family with many bathrooms, this is more than ample. To complete the installation, it may take as long as 10. Proper ventilation to prevent carbon monoxide poisoning and resizing gas lines and fittings will be more expensive due to the increased demand for labor. Modèle électrique a l’emplacement d’utilisation: Installing this beneath the sink is possible. Installation takes an average of two hours. Electric timer, outlet, and power supply lines are required.

Natural Gas or Propane Water Heaters

Installation of natural gas and propane models often costs between $1,000 and $1,500. While all of these types of gas will feed your system in a similar manner, there are some significant variations in the costs of purchase and operation between the two. propane must be purchased separately from natural gas since it is dependent on a utility supply line to be available. If you reside within a specific distance of a natural gas pipeline, you may be obliged to connect to it to heat your home. This isn’t a problem for the vast majority of homeowners.

Propane, on the other hand, is a more environmentally friendly and energy-efficient fuel that has a larger BTU capacity than natural gas. Styles that are tankless in nature are generally accessible in a broad range of types and dimensions. They

Electric Tankless Water Heater Prices

240V 80 Amp hard-wired electrical service is required for electric whole-house tankless water heaters, which means your home must have a minimum of 150 Amp of electrical service to run all of the equipment. Cati O’Keefe is an expert home builder and contributor to the Home BuildingSustainability website. Electric variants are less costly than gas counterparts, with installation costs ranging from $800 to $1,500 on average. Because there is no requirement for venting, the installation work required is less difficult as compared to gas types.

In comparison to a tank-based unit, the tankless electric unit is 20 percent to 30 percent more energy efficient and produces no greenhouse emissions.

  • Electric hybrid water heaters are initially more expensive than ordinary electric ones, but they heat water more quickly than conventional electric models. Despite the fact that they are not considered tankless, they have many of the characteristics of a tankless system: They do not require any ventilation and are extremely cost-effective. However, they are only available in versions with a maximum BTU output of 8,700. Electric Models for Point-of-Use: $100 to $300 per unit- These have a number of appealing characteristics, including as their price and ease of installation. Aside from that, they are quite easy to use beneath sinks and in compact spaces, including near washing machines. This is a fantastic alternative for folks who want compact units for campers, boats, and other modest restroom requirements. They are non-corrosive, insulating, visually appealing, and light-weight in design. They contribute to water conservation by easily heating and delivering it swiftly
Find a Pro to Get Your Heater Installed

Solar heaters range in price from $1,700 to $5,000 to install. Prices have been reported to go as high as $13,000. These approaches, on the other hand, produce some of the biggest returns. First and foremost, they are eligible for the 30 percent tax credit. For a $6,000 installation, that equates to $1,800 in return. Second, studies have shown that they may save water heating costs by 50 percent to 80 percent, depending on the model. Tankless heaters can be used in conjunction with solar power systems to maximize energy savings.

Solar water tanks can be used to store hot water collected by solar collectors, which can then be utilized by the tankless water heater in the residence.

Tax Credits

Another aspect that will have an impact on expenses is a discount that is being provided on solar-electric equipment. Solar water heaters are eligible for a 30 percent tax credit on the cost of installation from the federal government. More information on the solar tax credit may be found at Energy Star. Inquire with your installer about tax credits and manufacturer rebates, as well as other financial incentives.

Popular Tankless Heater Brands

Tankless Prices by Brand
A.O. Smith $600 – $4,000
Bradford White $500 – $2,000
EcoSmart $150 – $6,000
Rheem $200 – $2,000
Rinnai $500 – $4,300
Takagi $500 – $7,000

Choosing the Right Tankless Water Heater

“The advantage of using a tankless water heater is that you are avoiding any liability from leaks. We receive calls on a regular basis from customers whose conventional tank heaters have failed. Even the new ones fail since they are only capable of carrying 50, 40, or 100 gallons of water each. That leak might cause substantial harm if you’re on vacation and it happens to you. The advantage of using a tankless system is that you won’t have to worry about it.” Twin Home Experts is owned and operated by Jim Schuelke in Phoenix, Arizona.

So, how can customers choose which one is the best fit for their needs and preferences?

The flow rate, which is the amount of water that is required at a given moment, should be determined for both gas and electric systems. The flow rate is measured by counting the number of gallons that are produced every minute (gpm). In order to locate a

Average Water Usage for Common Household Features

  • Washing machine flow rates are 1.5-3.0 gpm
  • Shower flow rates are 1.0-2.0 gpm
  • Bathroom faucet flow rates are 0.5-1.5 gpm
  • Dishwasher flow rates are 1.0-2.5 gpm
  • Kitchen flow rates are 3.0-9.0 gpm.
Compare Quotes For You Tankless Heater Installation
  • Installation that is more time-consuming and expensive
  • Prices are higher
  • Units take up more space
  • They are better for larger places.

Pros of Tankless Units

This is not a project that the ordinary do-it-yourself homeowner should attempt. Many homes will need to be modified in order to suit this system, which may need the installation of new wiring or gas lines, the installation of new plumbing and fittings, and the rebuilding of drywall. This task must be conducted by a qualified professional in some areas, which is required by law. This is due to building rules governing carbon monoxide emissions, heat resistance, ventilation, and state-specific codes, such as seismic straps in California, among other things.

Additionally, they may make certain that you have the proper equipment for your property.

Using a professional ensures that your job is completed quickly and accurately, preventing your house from becoming a burden.


The payback time for these products is rather lengthy. Despite the fact that they are expected to endure for 20 years, it will take around 20 years for your energy savings to match your initial outlay. So the value of these models is determined by their use to you and their potential utility in attracting future home purchasers to your neighborhood. By selecting the most appropriate model for your consumption requirements, you may increase the return on your investment.

Are tankless hot water heaters better?

The advantages of these models over conventional models are numerous. They save water by heating as they go, and they can help you save money on your energy bills. As a result, they are more durable and require less maintenance than conventional tanks since they do not store water, which may erode tank material and create leaks.

Do tankless hot water heaters work without electricity?

A number of factors distinguish them from traditional models. It is possible to reduce household energy bills by conserving water and heating as you go. As a result, they are more durable and require less maintenance than conventional tanks since they do not contain water, which may erode tank material and create leaks.

What temperature should you set a tankless water heater?

The Consumer Product Safety Commission recommended that products be stored at 120 degrees Fahrenheit for the greatest amount of safety and efficiency. Do not set your unit to a temperature higher than 140 degrees Fahrenheit under any circumstance.

What is the best rated tankless water heater?

Rheem and EcoSmart are two brands that have received great ratings. In spite of this, the business is always changing and each home and family will have its own set of requirements. It’s advisable to speak with a professional to determine which option is best for you.

How much water does a 20-minute shower use?

A typical shower consumes 2.5 to 3.0 gallons per minute, resulting in a 20-minute shower consuming 50 to 60 gallons of water. In most cases, these water heaters are capable of producing 4 to 8 gallons of hot water per minute.

Cost to Install or Replace Tankless Water Heaters

Tankless water heaters are popular among homeowners because they are energy efficient, provide rapid hot water, and will never cause 40 gallons of water to flood your home. The only disadvantage is that they require a significant upfront cost to be installed. The experienced plumbers at Reliant Plumbing have put together this website to assist you in better understanding the expenses associated with your construction or remodeling project.

Please keep in mind that all pricing on this page is based on typical costs we’ve seen in the Austin, Texas area. Your expenses may vary based on the cost of plumbing labor and materials in your local region at the time of the estimate.

Cost to Install a Gas Tankless Water Heater

In the Austin, Texas region, the typical cost to have a qualified plumber install a gas tankless water heater is around $7,250– based on current costs for plumbing services. See the table below for a breakdown of the costs: When you are installing a tankless water heater for the first time, you will need to make a number of modifications to your home to suit the new unit. The reason for this is because the cost of installation varies greatly based on your current arrangement. Following are some of the steps that will need to be completed during the installation of your new tankless unit:

  • Reposition the water lines and circulation line
  • Install a condensate drain
  • Install a wall-mounted pan drain
  • And more. Temperature Pressure Relief Valve should be repositioned. A bracket and wall support should be installed to hang the tankless water heater. In the case of the gas line leading to the water heater, the pipe size should be increased. Converting metal venting to PVC is an option. Install flashing to guarantee that there are no leaks in the gas pipe (this may necessitate the use of a roofer)
  • To control the igniter temperature control panel, connect a 110-volt electrical outlet to the wall.
See also:  How Does A Gas Water Heater Work Without Electricity

Make sure to discuss with the plumber the specifics of your installation and that the price quotation you receive is in line with your requirements.

Cost to Install an Electric Tankless Water Heater

In the Austin, Texas region, the typical cost to have a qualified plumber install an electric tankless water heater is around $8,850– based on current rates for the area. Our expert plumber, on the other hand, does not suggest using an electric tankless water heater in most circumstances. This is due to the fact that the majority of homes do not have enough AMPs to satisfy the demands of an electric tankless water heater. You’ll need around four 40AMP breakers. In most cases, many thousand dollars in electrical work is required before a plumber can even begin working on the unit’s installation.

We’ve also seen electric units struggle to keep up with demand for hot water.

Cost to Replace a Gas Tankless Water Heater

In the Austin, Texas region, the typical cost to have a professional plumber replace a gas tankless water heater is roughly $4,700– based on current prices for plumbing services. It is far less expensive to replace a tankless water heater because your location has already been set up to accommodate tankless water heaters. These water heaters, on the other hand, should endure for at least 15 years before needing to be replaced. If you’re experiencing troubles with your tankless water heater, take a look at these often encountered issues.

See the following table for replacement expenses of a gas tankless water heater:

Cost to Replace an Electric Tankless Water Heater

In the Austin, Texas region, the typical cost to have a qualified plumber replace an electric tankless water heater is around $4,200– based on current prices for this service. It is far less expensive to replace a tankless water heater because your location has already been set up to accommodate tankless water heaters. These water heaters, on the other hand, should endure for at least 15 years before needing to be replaced. If you’re experiencing troubles with your tankless water heater, take a look at these often encountered issues.

It is recommended that if you are certain that you need to replace your electric tankless water heater, you consider converting it to a gas one instead. The electric models are more prone to malfunctions and have a shorter lifespan. We choose gas tankless heaters over other types of heaters.

How to Get an Estimate for Your Tankless Water Heater

Due to the wide range of differences between each property, it is impossible to estimate the cost of plumbing improvements. Frequently, when we arrive on a project site, we discover that the existing plumbing must be brought up to code before we can begin working. When hiring a plumber, you should always negotiate price with them up front. They should come to your home to assess the scope of your renovation and give an estimate. This is not going to be free, so be prepared! The time it takes for a plumber to come out to your house is considerable, and they frequently need to do some diagnostics before providing you with an estimate.

Do they charge for labor on an hourly basis or do they charge a set rate?

Learn More About Tankless Water Heaters

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Homewyse Calculator: Cost to Install Tankless Hot Water Heater

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Itemdetails Qty Low High
Tankless Water Heater CostNon-discounted retail pricing for: 8.5 gpm tankless gas water heater at 35F temperature rise. 0.92 energy factor. Digital controller. Requires natural gas supply and 3″ vent connection at unit. 5 yr limited warranty. 1 heater $1,329.20 $1,494.31
Tankless Hot Water Heater Installation Labor, BasicBasic labor to install tankless hot water heater with favorable site conditions. Mount and secure new heater. Connect vent to existing vent ducting. Connect water to existing supply lines. Leak and cycle test. Any surface demolition, structural modifications and restoration if needed is extra. Includes planning, equipment and material acquisition, area preparation and protection, setup and cleanup. 1 heater $1,329.20 $1,494.31
Tankless Hot Water Heater Installation Job SuppliesCost of related materials and supplies typically required to install tankless hot water heater including: connectors, fittings and mounting hardware. 1 heater $1,329.20 $1,494.31
Option: Remove Water HeaterDetach and turn off connections. Drain unit. Remove from premises. Disposal costs/fees not included. 1 heater $1,329.20 $1,494.31
Tankless Water Heater Debris DisposalCosts to load and haul away old materials, installation waste and associated debris. 1 heater 53.15625 60.46875
Unused Minimum LaborBalance of 2 hr(s) minimum labor charge that can be applied to other tasks.
Totals – Cost To Install Tankless Hot Water Heater
Average Cost per Heater

Custom Calculators with Homewyse Lists

Service Professionals: develop a reusable estimating software that is completely tailored to your company’s needs and procedures. Make use of one of the templates provided or create your own (both are free; account registration is required): Tankless Hot Water Heater Installation costs start at $2,324 – $2,696 per heater for a typical project in zip code 47474 with one heater and a total of one heater. Job size, circumstances, and alternatives will all have an impact on final prices. To get an idea of how much your project will cost, do the following: Set the zip code for the project in step one.


The number of “things” necessary for the project should be entered here.

RecalculateClick on the “Update” button to restart the calculation.

Unit Costs: How Pros Price

Instead of publishing prices from unrelated tasks in the past, Homewyse produces up-to-date estimates based on currentUnit Costs, as opposed to other websites. Due to the use of location, information, and alternatives tailored to the specific requirements of each work, the Unit Costmethod provides great accuracy. Businesses in the construction, commerce, design, and maintenance industries rely on the Unit Costmethod for transparency, accuracy, and equitable profitability.

How much does it cost to install a tankless water heater ?

Find out how much it will cost in your city. Get the job done in three simple steps. locates the most qualified and highly rated contractors in your region. 2Contractors will provide you with free, tailored quotes. 3Compare quotations and choose the contractor that would best meet your requirements. An energy-efficient addition for any home or commercial area, tankless water heaters are becoming increasingly popular. Many users prefer these models over others since they do not continually heat and cycle water, as some other types do.

As a consequence, water consumption is minimized, and considerable energy savings are realized.

A single-point hot water tank may be beneficial for small flats or for restricted use, such as when there is only one supply of hot water available to the entire building. These systems, on the other hand, can only pump half a gallon to two gallons of water at a time.

Item Cost
1. Tankless Water Heater Unit $450-$1,050
2. Installation Labor $90-$1,200
3. Optional Gas Line Installation/Replacement $500
Total Average Installation Cost $540-$2,750

Other considerations and costs

  • Find out how much it will cost in your area. Three simple actions will get the job done for you. Contractors from are the finest in their field, according to their customers’ reviews. contractors provide you with no-obligation estimates that are tailored to your specific requirements Calculate the cost of hiring the contractor that will best meet your requirements. For any home or commercial area, tankless water heaters are an excellent energy-saving solution. This type of device is popular among customers since it does not constantly heat and cycle water. An alternative heating system is used, which provides hot water on demand. Reduced water use and considerable energy savings are achieved as a result of this strategy. A single-point hot water tank may be beneficial for small apartments or for restricted use, such as when there is only one source of hot water available to them. These systems, on the other hand, are only capable of pumping half a gallon to two gallons of water.

If you need a loan to complete a home renovation project, consult our guide for more information.

DIY considerations

  • You may save a significant amount of money on labor expenses by installing this system yourself
  • But, tankless systems need specialized skills in order to be properly installed. However, even if you choose to build your own system, you will need to arrange regular maintenance appointments with a plumber or a maintenance firm. Before deciding to do the installation on your own, double-check that there isn’t any serious reconfiguration necessary.


  • It is possible to save a significant amount of money on labor expenses by installing this system yourself
  • However, tankless systems need certain expertise on how to install them properly. However, even if you choose to build your own system, you will need to arrange regular maintenance appointments with a plumber or maintenance firm. Before deciding to do the installation yourself, double-check that there isn’t any serious reconfiguration needed.

When it comes to installing a tankless water heater in your area, how much does it cost? Estimates may be obtained by inputting your zip code.

Cost by city

  • $1,810
  • Philadelphia, PA$2,642
  • Bronx, NY$2,171
  • Brooklyn, NY$1,810
  • Washington, DC$1,959
  • Atlanta, GA$1,773
  • Miami, FL$1,612
  • Fort Lauderdale, FL$1,689
  • Minneapolis, MN$1,981
  • Chicago, IL$2,308
  • Houston, TX$2,381
  • San Antonio, TX$1,598
  • Austin, TX$1,810
  • Phoenix,

New York, NY$2,642; the Bronx, NY$2,171; Brooklyn, NY$1,810; Philadelphia, PA$2,258; Washington, DC$1,959; Atlanta, GA$1,773; Miami, FL$1,612; Fort Lauderdale, FL$1,689; Minneapolis, MN$1,981; Chicago, IL$2,308; Houston, TX$2,381; San Antonio, TX$1,598; Austin, TX$1,8

Water Heater Installation Cost Guide (2022)

A comparison of the costs of a tank and a tankless water heater, gas versus electric water heaters, energy-efficient water heaters, signs of a failing water heater, how to choose a water heater, when to call a plumber, and frequently asked questions In practically every family, having access to clean, hot water has become a luxury. While the requirement for hot water in a home is constant, the methods by which it is produced are constantly evolving, with a wide range of tanks and fuel sources accessible to homeowners.

Tank vs. Tankless Water Heater Costs

In terms of water heaters, the tank and tankless water heaters are two of the most popular options available.

Tank Water Heaters

Storage tank water heaters are a popular alternative for households because they can keep and heat large amounts of water on a continuous basis. Water heaters are often situated out of sight, in a garage, basement, or utility closet, among other places. Tank water heaters generally utilize electricity or natural gas to heat the water they produce. The installation of a storage tank water heater is less difficult than the installation of a tankless water heater, needing just roughly three hours of effort.

Tank heaters, although being a more inexpensive choice, are less energy-efficient due to the fact that they must operate continuously in order to maintain the target tank temperature.

Tankless Water Heaters

Tankless water heaters function by heating water only when it is required. The technology heats the water pipe with either a gas burner or electricity, allowing it to furnish water on demand. A tankless unit, like a hot water storage tank, can be kept in a basement or utility closet for easy access. Tankless heaters are less bulky than tank units and may be placed on the wall of a bathroom or bedroom, for example. Tankless water heaters are more expensive to purchase up front than tank water heaters, with prices ranging from $1,200 to $3,500 for homes.

Electric tankless heaters will require the installation of brand new electrical wiring. Despite the fact that tankless heaters are more expensive to install than traditional types, they are more efficient and have a lower operating cost.

Gas vs. Electric Water Heater Costs

Tankless and tank water heaters are both available in gas and electric variants, with each offering its own set of advantages and disadvantages to homes.

See also:  Who Can Fix A Water Heater

Electric Water Heaters

An electric tank is less expensive to purchase and install than a gas tank, with a household 50-gallon tank water heater costing roughly $500 to purchase and put in place. The overall cost of operation on a monthly basis, on the other hand, is typically more than the cost of operating a gas heater. Because there is a lower danger of a leak or combustion with this heat source than with gas, it is regarded to be safer than gas. The disadvantage of using an electric heater, which is more ecologically friendly, is that if the power goes out, so does the hot water.

Gas Water Heaters

Gas heaters are more expensive to acquire, with a 50-gallon tank costing around $700. The operating costs of these heaters, on the other hand, are less expensive than those of an electric type. Despite the fact that natural gas is more likely to combust or leak, a gas-powered water heater produces hot water without the use of electricity. The most significant disadvantage of using a gas water heater is the harm it causes to the environment via the release of carbon dioxide. More information may be found at: How to Choose the Most Appropriate Water Heater Warranty

Energy-Efficient Storage Tank Water Heater Costs

For a 50-gallon tank of gas, it costs around $700 to acquire a heater. This type of heater does have a higher initial cost, but its operating expenditures are lower than those of an electric heater. However, despite the fact that natural gas is more likely to combust or leak than electricity, a gas-powered model can deliver hot water without the need for an electrical source. By emitting carbon dioxide into the atmosphere, the most significant disadvantage of a gas water heater is its negative impact on the environment.

Solar Water Tank Heaters

Natural sunlight is used to heat the water in these water heaters. A solar water heater system is made up of two parts: a storage tank that retains water and solar collectors that produce heat. In most cases, a solar water heater will rely on a standard water tank in the event of a power failure. Active solar water tank systems and passive solar water tank systems are the two main types of solar water tank systems. An active system provides water to residences through the use of a pump, whereas a passive system circulates water around the home through the use of natural convection.

The increased expense is due to the considerable amount of labor required as well as the requirement for a backup water heater.

Indirect Water Heaters

Heat is provided to the tank by an existing furnace or boiler, which is powered by the energy from the furnace or boiler. The water from the boiler is cycled into the tank’s coils, where it is heated by the water contained within. This water heater style is energy efficient, as it relies on heat generated by a boiler or furnace to heat the water.

Although the monthly cost of an indirect water heater is low, the initial purchase and water heater installation costs are more than those of traditional heaters, and are around $1,500 in comparison to the latter. Adobe Licensed (Adobe Licensed)

Signs of a Failing Water Heater

You should be on the lookout for warning indicators (such as the ones listed below) that indicate that you need to replace your water heater if you already have one on your property. You may also avoid these problems by keeping your system in good working order using items from reputed firms such as Corro-Protec.

  • Water that is discolored or has an unusual flavor
  • It is possible to have water that takes longer to heat than usual or does not heat at all. Noises originating from your water heater that are loud or unusual
  • Leaks
  • A hot water heating system that has been in operation for more than 15 years

Selecting Your Water Heater

Keep the following considerations in mind when selecting a water heater for your residence:

  • Prior to purchasing a water heater for your house, examine whether or not the required fuel type is readily available. For example, if you’re considering a natural gas water heater, ensure sure your home already has or is capable of receiving a natural gas connection before proceeding. Household size and number of people in your house should be taken into consideration when purchasing a gas tank. Size of your home— For example, a family of two people need a 30–40 gallon tank, but a household of four people requires a 50–60 gallon tank. Savings on both costs and energy— Consider the price of each water heater as well as the cost of the fuel it uses. However, while certain heaters may be more expensive up front, their energy efficiency may allow you to save money in the long term.

When You Should Call a Plumbing Professional

It is suggested that you contact a professional if your water heater is showing symptoms of wear or if it has abruptly failed. Despite the fact that you may opt to replace a water heater as one of your home improvement projects, the intensive work and extensive expertise required to install a system make water heater repairs and replacement a job that is best left to a professional plumber.

Frequently Asked Questions About Water Heaters

It is suggested that you contact a professional if your water heater is showing symptoms of wear or if it has abruptly stopped working. Despite the fact that you may opt to replace a water heater as one of your home improvement projects, the amount of effort and extensive expertise required to install a system make water heater repairs and replacements a job best left to a professional plumber.

How many hours a day does a water heater run?

If your water heater is showing symptoms of wear or if it fails abruptly, it’s best to consult with a specialist. While you may opt to replace a water heater as one of your home improvement projects, the amount of effort required and the extensive expertise required to install a system make water heater repairs and replacement a job best suited for a plumber.

How much does it cost to replace a 50-gallon water heater?

For an electric water heater of the same size, the cost is around $1,000, while a natural gas water heater of the same capacity is approximately $1,200. Send an email to our Reviews Team if you have any comments or questions regarding this post.

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.

Is there a chance of a leak?

Tankless Water Heater Installation: Is It Worth It?

Put it this way: Consider the following scenario: Astonishingly, the majority of American families waste water when they heat water. In order to ensure that we have hot water available whenever we need it, we fill large 40- to 50-gallon storage tanks and then continuously pump energy into them throughout the year. However, this isn’t always the case in real life. 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 bathtub.

Then there are the niggling concerns such as these: What if it’s full with silt that saps energy? Is there a chance of it bursting? As a general rule, tanks fail after 8 to 12 years, thus these are legitimate worries.

How Does a Tankless Water Heater Work?

Consider the implications of this: The method used by the majority of families in this nation to heat water is outrageously inefficient. We fill large 40- to 50-gallon storage tanks and then continuously pump energy into them throughout the year to ensure that we have hot water available whenever we need it. However, this is not always the case. If a teenager takes a long shower or a spouse relaxes in the tub, it may be necessary to wait for the tank to reheat. There are also the niggling concerns: Is it clogged with silt that drains energy?

Both of these worries are fair given the fact that tanks often fail in 8 to 12 years.

  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. an 11-inch sealed vent(or pair of vents) through a roof or other structure

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 costs of a first-time installation are higher than the costs 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

It is important to note that, unlike tank-type heaters, they will not leak large amounts of water, house Legionella germs, or topple over during an earthquake. The air supply and exhaust vents are also closed to prevent backdrafting, which would otherwise allow carbon monoxide to enter the home.

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.

See also:  Tankless Water Heater How Does It Work

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 outcome is in between two models, use the more conservative model.

Btus Output Estimate

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

  • Have no desire to perform any mathematical calculations. Calculate the amount of heater output you’ll require using these numbers.

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?

To get the real gpm of a fixture, time how many seconds it takes to fill a bucket to the 1-quart mark and multiply that time by the number of gpm. gpm is calculated by dividing 15 by the number of seconds in a minute.

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.

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.

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.

What Is The Average Cost To Replace A Hot Water Heater?

It is possible that the cost of replacing a hot water heater system may be significantly higher in 2020, depending on your requirements. Replacement of a heater with a 50-gallon tank unit can cost anywhere from $400 to $1,000 on average, depending on the model. If you choose to go tankless, the cost might range anywhere from $1,500 and $2,500, depending on your location. Additionally, most plumbers will charge you for properly disposing of your old water heater in addition to the expenses of components and labor (which range between $250 and $500).

Replacing your water heater: which type?

When comparing the costs of a typical water heater with a tank and a tankless water heater, the difference is fairly considerable. In certain cases, a tankless heater might cost up to $1,600 just for the device (minus labor costs). Tankless devices, on the other hand, have the potential to save you money over time. This is due to the fact that typical water heaters can hold up to 50 gallons of hot water, which is a significant amount of water to heat. Tankless water heaters operate on the principle of superheated coils to provide hot water on demand.

If you can afford a tankless system altogether or if you can work out a payment plan with your lender, it may be worthwhile to consider a tankless system since you might save money on fuel or utility costs.

The pros and cons of tank water heaters

A tankless water heater may be out of reach financially, but the good news is that a conventional water heater will cost you substantially less money in the long run. Tank water heaters are available for purchase for a range of prices ranging from $200 to $600. These devices are less expensive to acquire, less difficult to install, and they do not cause problems with hot water delivery. On the other hand, they are more expensive to operate, have a shorter lifespan of 6-10 years, and must be placed within the home, which means they might take up precious space that could be put to greater use elsewhere in the house.

Cost comparison: gas vs electric water heaters

If you are concerned about the long-term energy expenditures of your water heater, an electric water heater is the most cost-effective option for you to consider. When it comes to powering your gadget, electricity is somewhat more expensive than natural gas, while an electric water heater is marginally less expensive than a gas-powered heater. An electric water heater may be a smart option if you’re contemplating additional cost-saving initiatives such as solar panels.

The typical cost of an electric tank heater is roughly $750, with yearly energy usage being around $460 per heater. While a gas tank heater costs somewhat more than an electric tank heater, the annual energy bills are around $350.

The importance of energy efficiency

The cost of hot water can account for as much as one-third of your total energy expenditure. You should get the most energy-efficient equipment you can afford if you have a large amount of hot water use in your household. This might help you save hundreds of dollars over the course of several years.

Additional costs

When it comes to replacing a water heater, you should be informed of any additional costs that may be incurred – and whether or not you will be required to incur them. Adding a warranty to your heater, for example, may increase the cost of the heater, but it may also cover you in the case of equipment failure.


In the end, the cost of a new water heater will be determined by your specific needs and circumstances. It may be beneficial to discuss your requirements with a professional, who should be able to take into consideration your water use, the number of people that live in your household, and your fuel alternatives. In order to choose the most cost-effective choice for your house, you should consider the following. If you want assistance with your hot water heater, do not hesitate to call the experts at D N Plumbing and Gas.

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