Tankless Water Heater Prices & Cost Guide
Want to know how much a tankless water heater costs? Well, welcome to our tankless water heater price comparison website, providing you with a comprehensive overview of prices and costs for single-point and whole house tankless water heater systems.
How Much Does a Tankless Water Heater Cost?
Gas tankless water heaters cost quite a bit more than electric tankless water heaters.
Electric: Installed cost ranges from $600 to $1,500 for most point of use and whole house electric water heaters.
Gas: Installed cost averages from $750 for point of use models to $3,350 for whole house gas water heaters in most homes.
Cost can be higher when complete plumbing, wiring and venting of the unit is included in the installation cost.
Below, a table overview includes the average costs broken down into low, average and high cost ranges, based upon the most common cost factors likely to affect the unit and install price. This includes unit type (single-point or whole house), flow rates (GPM), power supply types (gas or electric) as well as labor, supplies and permit costs. Check out the most popular brands for finer pricing details, product and warranty information from Rinnai, Rheem, Navien and more.
| Tankless Water Heater System Cost Breakdown | |||
| Low Cost Range | Average Cost Range | High Cost Range | |
| Cost Range | $250 – $750 | $550 – $2,600 | $2,650 – $5,600 |
| Unit Type | Point of Use | Whole House | Whole House |
| Power Supply | Electric / Gas | Electric / Gas | Electric / Gas |
| Flow Rate in Gallons Per Minute (GPM) | 0 – 2.0 GPM | 2.1 – 6.0 GPM | 6.1 – 8+ GPM |
| Unit Cost | $99 – $600 | $300 – $2,000 | $2,000 – $4,800 |
| Tankless Water Heater Installation Cost | |||
| Labor Cost | $50 – $100 | $100 – $300 | $300 – $650 |
| Supplies Cost | $30 – $60 | $30 – $60 | $30 – $60 |
| Permit Cost | $45 – $250 | $45 – $250 | $45 – $250 |
| Popular Brands – AO Smith | Noritz | Rinnai | Rheem | Navien | Eccotemp | |||
How Much Will it Cost me to Install a Tankless Water Heater in my Home?
We have included the cost of a tankless water heater, for both gas and electric, showing that including installation you can expect to pay between $250 – $3,200 for a tankless water heater. The cost range includes the low and high end water heater prices from all major brands, including single-point/point of use and whole house tankless water heaters.
Tankless Unit Costs
A point of use tankless hot water heater is one of the cheapest units you can buy and will only cost between $99 and $600 for the unit. A whole house tankless water heater system in comparison however will cost significantly more with prices between $550 – $3,000+, for a fully installed system. Unit costs will be largely affected by the type unit (whole house or single-point), the type of power supply (gas or electric) and the flow rate (GPM).
Tankless Water Heater Installation Costs
Labor costs will vary slightly based upon the region in which you live, the type of tankless heater you buy (electric or gas and point of use or whole house), as well as employing a company or a single contractor to complete the works. The labor costs from a plumber for a tankless water heater installation will range between $50 – $150 per hour. Labor costs for an electrician are similar and you should expect to pay $50 – $100 per hour. On average you should expect to pay 3-4 hours worth of labor for the average installation on a whole house tankless water heater, without any complexities, therefore giving you a labor cost for tankless installation between $150 – $300 on average, with high cost ranges as high as $300 – $650. For a point of use tankless water heater, installation costs will be lower and usually 1-2 hours labor is all that will be needed. Therefore, expect to pay slightly less at around $100 for a point of use tankless heater installation.
Additional Supplies Cost
Additional supplies will include items such as connectors, fittings and occasionally specialist tools, which aren’t usually too expensive and add around $100 to the total cost at most. As a rule all professional contractors will usually have the tools they need if they are qualified to do the job. So additional supplies usually only include sundries.
Installation Permit Cost
Permit costs for installation of a water heater vary depending on the state or region you live in. However, permits are required in almost all states and regions due to the fact that things can go wrong with a water heater installation, many of which can cause threat to life such as the leakage or carbon monoxide. Therefore it’s worth ensuring that the work is both completed and checked by a qualified contractor, and as such a permit is provided to prove this. The cost of a permit for a tankless hot water heater installation / replacement will usually cost between $45 and $250, this is added onto the total project cost.
Comparing Point of Use & Whole House Tankless Hot Water Heater Costs for Best Brands
There are 40+ brands making tankless hot water heaters, with around 12 of these brands dominating the market as the most popular choices for consumers, these are listed in the two brand tables below. We have broken down prices for tankless water heaters into the two major types, single-point and whole-house or central, as well as listing prices for electric, gas and flow rate in gallons per minute (GPM).
Top Tankless Water Heater Brands
How Much Does a Rinnai Tankless Water Heater Cost?
Rinnai tankless water heaters cost somewhere between $500 – $2,100 for the unit and $700 – $3,200 installed, depending on if you buy a whole house or point of use system.
How Much Does a Rheem Tankless Water Heater Cost?
The cost of a Rheem tankless hot water heater is somewhere $370 – $2,100 for an electric unit and $1,650 – $3,500 for a natural / propane gas system, both including installation.
How Much Does a Eccotemp Tankless Water Heater Cost?
Eccotemp tankless hot water heaters will cost between $300 and $1300, depending on if the unit is supply only or installed. It’s also significantly cheaper for a point of use compared with whole house system.
How Much Does a Navien Tankless Water Heater Cost?
Navien tankless water heaters are some of the most expensive on the market, costing between $2,000 – $3,500 for a fully installed system.
Central System / Whole House Tankless Water Heater Prices Listed by Brand
What is a central system or whole house tankless water heater? Whole house tankless water heaters are just that, they have the ability to send hot water from the installed location of the unit to the rest of the home through a network of copper pipes, and supply all mains hot water appliances within it. A whole house water can be installed both inside or outside, and which you choose depends on a few factors. Indoor heaters take up space, but equally you have to live in a climate which prevents extreme temperature, wind or water damage to the heater. Indoor tankless heaters are usually the first choice, but it’s worth keeping in mind indoor heaters require ventilation (gas in particular), additional space, they make noise and can create condensation.
A whole house tankless water heater system will cost you between $570 – $3,500, in comparison a single-point water system unit will cost just $250 – $750, fully installed and inspected.
The table below provides a comprehensive cost breakdown for whole house tankless hot water heaters from the most popular and trusted brands, with unit costs and the unit cost with contractor install included:
| Compare a Whole House Tankless Water Heater Cost by Brand | ||
| Popular Brands | Central Tankless Heater Unit Cost | Tankless Heater Installation Cost & Unit Cost |
| Rinnai | $500 – $2,100 | $770 – $3,200 |
| Rheem | $309 – $1,588 | $570 – $3,500 |
| Eccotemp | $313 – $997 | $585 – $1,270 |
| Eemax | $330 – $500 | $580 – $770 |
| MAREY | $500 – $650 | $770 – $920 |
| ATMOR | $350 – $1,200 | $620 – $1,470 |
| NORITZ | $1200 – $1585 | $1,470 – $2400 |
| Westinghouse | $750 – $1,800 | $1,100 – $2,100 |
| Stiebel Eltron | $500 – $850 | $770 – $1,120 |
| EccoSmart | $360 – $900 | $580 – $1,200 |
| Navien | $600 – $1,100 | $1,950 – $3,500 |
| *Factors which can affect the prices shown here include 1) Your location in the U.S. 2) Complexities of the job; 3) Model of tank 4) Fuel supply, i.e. electric vs gas 5) Flow rate | ||
Point of Use Tankless Hot Water Heater Prices Listed by Brand
What is a single-point or point of use tankless water heater? Unlike a whole house tankless water heater, a single-point unit provides water to a single item within the home such as a bathroom sink, a shower or a bath being the most common areas these are installed. Single-point units provide instant hot water at the point of need, with both speed and efficiency. As outlined above, a point of use system will cost somewhere between $250 – $750, which is vastly lower than a whole house system, since single-point water heaters are purely designed to heat one specific appliance.
| Compare a Point of Use Tankless Water Heater Cost by Brand | ||
| Popular Brands | Point of Use Tankless Heater Unit Cost | Tankless Heater Installation Cost & Unit Cost |
| Rinnai (Only 2 Units) | $550 – $600 | $700 – $750 |
| Rheem | $475 – $550 | $700 – $999 |
| Chronomite | $180 – $380 | $330 – $530 |
| Eccotemp | $150 – $250 | $300 – $400 |
| Eemax | $200 – $450 | $350 – $600 |
| MAREY | $180 – $370 | $330 – $520 |
| ATMOR | $99 – $330 | $250 – $380 |
| CAMPLUX ENJOY OUTDOOR LIFE | $199 – $399 | $350 – $550 |
| Westinghouse | $340 – $420 | $490 – $570 |
| Stiebel Eltron | $190 – $240 | $340 – $390 |
| EccoSmart | $140 – $170 | $290 – $320 |
| Ariston | $155 – $270 | $305 – $420 |
Cost Range for All Brands of Tankless Water Heater, Excluding Pro Installation
The cost range for tankless hot water heaters from all major brands are listed below. These ranges include both point of use and whole house systems, both gas and electric, including pro installation and certification:
- AquaPower – $150 – $320
- A. O. Smith – $99 – $849
- American Standard Water Heaters – $800 – $1,000
- AO Smith – $300 – $1,540
- AQUAH – $150 – $300
- Ariston – $155 – $270
- Atmor – $250 – $1470
- Black + Decker – $190 – $500
- Bosch – $150 – $650
- Chronomite $180 – $350
- CAMPLUX ENJOY OUTDOOR LIFE – $199 – $399
- Eccotemp – $150 – $1,000
- Ecosmart – $150 – $900
- Eemax – $190 – $700
- IHeat – $180 – $530
- MAREY – $130 – $600
- Navien – $600 – $1,100
- Noritz – $1200 – $1585
- Rheem – $169 – $1,580
- Rinnai – $550 – $2,100
- Stiebel Eltron – $190 – $1,500
- Themalux – $500 – $1,100
- TITAN – $250 – $1,800
Comparing Tankless Water Heater Prices for Main Types, Location, Power Supply & Flow Rate
Below, we compare prices and costs for various types of tankless water heater including, prices by power supply (gas vs electric tankless), prices by flow rate in GPM and finally, prices by location (indoor vs outdoor tankless heaters). The price ranges shown below include installation, additional parts and permits, unless otherwise specified.
Tankless Hot Water Heater Prices by Power Supply
How Much Does a Gas Tankless Water Heater Cost?
Gas tankless water heaters are available for supply by natural gas or by liquid propane gas. They are available in whole house and point of use, although point of use heaters are more commonly electric. Therefore, brands and models supplying gas point of use heaters are limited. For those that are available, the cost of a point of use gas tankless water heater will range between $100 – $400 or $320 – $650 with installation and permits included. Gas whole home tankless heaters will cost more at a price range of $450 – $2,500 for supply, or $750 – $3,200+ with installation and relevant permits included.
How Much Does a Gas Tankless Water Heater Installation Cost?
The cost of gas tankless water heater installation is usually between $175 – $1,000, including labor, parts and permits. This doesn’t include the cost of the point of use or whole house unit.
How Much Does an Electric Tankless Water Heater Cost?
Electric water heaters are usually cheaper than gas alternatives. An electric tankless water heater cost will average between $80 – $900, depending on a few factors such as location (indoor or outdoor) and type (whole house or point of use). Including installation the cost is usually $300 – $1,300.
Electric Tankless Water Heater Installation Cost
The cost of installation for an electric tankless water heater is usually between $150 – $500, including labor, parts and permits. This doesn’t include the cost of the point of use or whole house unit.
Tankless Water Heater Prices by Flow Rate
Flow rate is an important factor to consider when buying a tankless water heater. In short, the flow rate of a heater will determine how many appliances you are able to run simultaneously. By having an inadequate flow rate you will find when multiple appliances are in use, water will be supplied at a lower pressure and a colder temperature. More more information, see this article on understanding flow rates of tankless water heaters.
Below, we have included a breakdown of tankless hot water heater costs by flow rate in GPM (Gallons Per Minute).
| Comparing Tankless Hot Water Heater Costs by Flow Rate | ||
| Flow Rate (GPM) | Unit Cost | Installed Cost |
| 0 – 2.0 | $99 – $500 | $320 – $750 |
| 2.1 – 4.0 | $130 – $780 | $240 – $1,000 |
| 4.1 – 6.0 | $280 – $800 | $500 – $1,100 |
| 6.1 – 8.0 | $630 – $1,825 | $1,000 – $2,400 |
| 8.0+ | $890 – $2,500 | $1,300 – $3,200+ |
Indoor and Outdoor Tankless Heater Costs Compared
| Comparing Indoor and Outdoor Tankless Hot Water Heater Costs | |||
| Location | Power Supply | Unit Cost | Installed Cost |
| Indoor | Gas | $140 – $2,500 | $360 – $3,200 |
| Outdoor | Gas | $500 – $2,000 | $760 – $2,400 |
| Indoor | Electric | $80 – $900 | $300 – $1,300 |
| Outdoor | Electric | $110 – $530 | $290 – $750 |
Comparing Tankless Water Heater Costs from Around the Web
There are various websites online which quote the cost of a tankless water heater, including installation. The following table provides a comparison of these quoted tankless water heater costs from other popular websites around the net, we compare tankless water heater costs right here saving you the time and effort of having to scour the web.
| Web Compare of Tankless Water Heater Costs Including Installation | ||
| Website | Cost Range | Average Cost |
| Web Compare Average | $983 – $2,600 | $1690 |
| TanklessWaterHeaterCosts | $250 – $3,200 | $1,725 |
| Improvenet | $1,273 – $2,300 | $1,921 |
| HomeWyse | $1,844 – $2,142 | $1,900 |
| HomeAdvisor | $1,069 – $3,112 | $2,000 |
| HomeGuide | $1,470 – $2,510 | $1,950 |
| PickHVAC | $500 – $2,000 | $1,200 |
| HowMuch | $540 – $2,750 | $1,645 |
| RemodellingExpense | $1,000 – $4,000 | $1,900 |
| ThisOldHouse | $170 – $2,000 | $1,000 |
Owner Installed Tankless Hot Water Heater Costs
Below we have compiled a list of electric and gas tankless water heater installation costs from owners and contractors who visit our site and use our “project submission form”. We regularly update this list with bi-weekly price updates from submissions and from date obtained from reliable sources around the web. You can contribute to our ever growing list by submitting a single or whole house tankless water heater price that you were quoted or you have paid for a system. Simply take a moment to use our project submission form listed above.
As you will see below, there are many variables which can affect the price of a tankless water heater, therefore we usually recommend you receive quotes from at least 3 contractors first, so that you can compare the quotes yourself and obtain the best deal possible. You can click here to get a free set of instant estimates today.
| Location | Brand / Model | Power Type | Flow Rate (GPM) | Installation Included? | Total Cost (Installed) |
| Gilbert, Southern AZ | Unknown | Gas | 5.0 | Yes | $2,400 |
| Comment: Installation of tankless water heater by a pro, including pipework and necessary gas connection. | |||||
| Hudson, NJ | Rinnai | Electric | 4.0 | Yes | $600 |
| Comment: Replacement of broken tankless water heater, replacement with like-for-like electric unit. $350 for unit and $250 for installation. | |||||
| Austin, TX | Unknown | Propane Gas | Unknown | Yes | $250 |
| Comment: Installation of 2 propane single-point tankless water heaters. | |||||
| Rock Tavern, NY | Rinnai Super High Efficiency Plus | Gas | 10.0 | Yes | $2,500 |
| Comment: Installation of a single Rinnai whole-house tankless water heater. | |||||
