Best Tankless Water Heater 2020 Reviews

Technology has continuously improved over the past few years. This has helped to make your life easier, while providing you with far more options than ever before. While many things have changed, some still remain the same. One thing that has gone unchanged is the need for hot water. All households around the world need access to a sufficient amount of hot water for showering, cooking and other purposes.

best tankless water heater

Top 5 Best Tankless Water Heater 2020 Reviews

Nevertheless, the way you obtain that hot water has changed, thanks to the inception of the tankless water heater. Below, you’re going to learn a great deal about these specific models of water heaters, their benefits, and how to choose one for your property!

#1 Rinnai V65EP 6.6 GPM Outdoor Low NOx

Tankless heaters have grown extremely popular throughout the years due to their Rinnai V65EP 6.6 GPM Outdoor Low NOx Tankless Propane Water Heatercompact design and high-energy efficiency ratings. The only problem is, manufacturers have recognized just how popular these devices have become and now the market is flooded with them. You can probably remember shopping between two or three different brands, now there are dozens.

However, if you are truly looking for one of the most dependable and best selling tankless heaters on the market, you need to check out the Rinnai V65EP. With its ability to be converted between natural and propane gas this water heater is truly perfect for any gas operated home.

Certified For Mobile Homes

Not everyone lives in a house, apartment, or condo. There are a large number of people that live in mobile homes. There is nothing wrong with this it, just leaves them less open to energy efficient heaters, or at least that was until now. The Rinnai V65EP has now been certified and tested for mobile home applications.

Temperature Lock

A unique thing about Rinnai V65EP is that it is temperature controlled through a thermostat. This thermostat is very similar and operates in the same manner as your heating and air thermostat. This gives users unique, quick, and easy access to change the water settings.

The only problem is that a kid could by and easily makes changes leaving the water scalding hot or not hot enough. However, with the Rinnai V65EP this is something that users never have to worry about. This water heater is installed with a temperature lock that prevents accidental or unauthorized changes in the water temperature.


  • Easy and quick installation
  • Compact design save tons of floor space
  • Enhanced scale detection prevents long-term damage
  • Temperature lock prevents unauthorized changes to the temperature
  • Complies with South Coast Air Quality Management District emissions codes
  • Can be installed in mobile homes


  • Cannot be installed inside
  • Performance decreases in colder climates

Overall Assessment

If you have ever gone through the process of installation a H20 heater, you probably know that it can be a daunting task. Just removed the body of the old one and bringing in the new one can be enough to tire you out. However, that will not be the case with the Rinnai V65EP. Thanks to its compact and lightweight design this water heater is extremely transport friendly and be actually be installed by 1 person. If you are jumping on the tankless bandwagon like the millions of other homeowners, you need to check out this model

#2 Takagi T-KJr2-IN-NG Indoor, (Natural Gas) Review

Whether you are looking for a upgraded, more efficient water heater or replacing a broken Takagi T-KJr2-IN-NG Indoor Tankless Water Heater, Natural Gasdown heater, you cannot go wrong with the Takagi T-KJr2-IN-NG. The Takagi Company has a whole product line of on demand heaters that pride themselves on efficiency, durability, and reliability. However, the T-KJr2-IN-NG is their smallest design available, making it perfect for small homes, apartments, condos, or workshop.

Indoor Installation

If you have an exterior water heater you probably already know that the performance greatly decreases when the temperature drops outside. However, with the Takagi T-KJr2-IN-NG this is something that users never have to worry about. This water heater was designed to be installed indoors and can easily be mounted on a basement wall, in a storage closet, or in a garage. Not only does the indoor installation provide better performance ratings, but it also makes for a much easier installation.

Inlet, Outlet Thermistors Provide Constant Temperature Monitoring

When dealing with hot water users often times have to be very careful. Not only can an increase in hot water indicate problems inside your unit, but also it can scald and burn the skin if you are not aware of the changes. This is why the Takagi T-KJr2-IN-NG comes equipped with inlet and outlet thermistors that constantly monitor the temperature of the water coming in and going out of the water heater. In the event that the water gets too hot or not hot enough the water heater will automatically shut down, which will prevent further damage to the unit.


  • 140,000 BTU
  • 6 gallons per minute
  • Inlet and outlet thermistors constantly monitor temperature
  • Space saving design


  • Must use stainless steel venting to the outdoors

Overall Assessment

With its indoor capabilities and compact design, this is a must-have for anyone that lives in a condo or small apartment. Do not be fooled by the small design, because it has the capability to pump out 6.6-gallons of water a minute, which is enough to supply a 2 and half bath.

#3 Eccotemp Systems L5 Portable And Outdoor Shower

Are you tired of taking a cold shower, while you are travelling around in an RV, hiking or Eccotemp L5 Portable Tankless Water Heater and Outdoor Showercamping? If so, it may be time to consider investing in the Eccotemp Systems L5. This unit is very unique in that it is integrated with an outdoor shower. Believe it or not, this water heater is capable of providing you with an abundance of hot water, so you will never be forced to go dirty or take a cold shower ever again.

Operates On Propane

The Eccotemp Systems is exactly what everyone needs, when they are spending time outdoors. The unit operates on liquid propane fuel, which is similar to the setup of your outdoor grill and lantern. Just connect the propane tank to the water heater and enjoy endless hours of hot water. You will be able to utilize the water for showering, laundry, cooking and cleaning. This will eliminate the need for sharing the camp ground showers with strangers. Plus, you will be able to utilize the unit right in the privacy of your temporary shower stall.

Water Pressure

When utilizing the Eccotemp Systems L5, you will need a good supply of water. In fact, the water pressure must be between 20 to 80 pounds per square inch (PSI), in order for it to work properly. Most campgrounds provide campers with water hookups, so all you need to do is to connect the unit to a water hose, before the first use.

Easy Setup Process

The Eccotemp Systems L5 is extremely easy to set up. As mentioned above, it will connect to any traditional water hose. You can control the unit by turning the water tap on and off. The embedded automatic ignition will immediately switch on burners as soon as the water begins to flow. You will be able to conserve water throughout each use, since it does not need to run awhile, before it produces hot water.


  • Temperate range varies from 80 to 150 degrees Fahrenheit
  • Flow rate – .5-1.4 gallons per minute (GPM)
  • Easy setup process
  • Compatible with any traditional water hose
  • Operates on liquid propane fuel
  • Weighs approximately 13 pounds
  • Comes with a showerhead and hose


  • Requires at least 20 PSI, but no more than 100 PSI, which is hard to determine, when you are camping in an unfamiliar area

Overall Assessment

If you are considering investing in this unit, you may want to consider investing in a separate water pressure regulator. The Eccotemp L5 Portable is the key to having a comfortable outdoor adventure. The unit is extremely easy to hook up, requiring only about 10 to 15 minutes of your time. Once the unit is complexly set up, you will be provided with unlimited amounts of hot water. The fact that the unit heats the water up almost immediately means that you will still be able to reserve water, while you are on vacation.

#4 Rheem RTE 13 Electric Heater Review

Upgrading a home may include a variety of things, such as new wall paint, flooring, appliances Rheem RTE 13 Electric Tankless Water Heaterand heater. However, if you are looking to go all out on this renovation project, you should consider replacing the existing tank water heater with a new tankless unit.

This water heater is designed to provide instant hot water and energy efficiency. Once the unit is installed in your home, you will never have to wait around for the water to get hot, before hopping in the shower.

Durable Heater Exchanger

To ensure the longevity of the water heater, Rheem integrated it with a brass/copper heat exchanger. This feature is designed to heat the water as it goes through the water heater. The brass and copper material is rust and tarnish resistant, so it will last longer materials utilized for the same application.

Space Saving Design

A traditional water heater can take up a lot of room in a home. In fact, when the home is being built, the architect or builder will create a room specifically for the water heater. However, this will not be a requirement for a tankless unit, because they can be installed on any interior or exterior wall.

It is important to note that the Rheem RTE 13 is designed for interior installation, since it operates on electrical power. Once the unit is installed on the wall, you will have plenty of floor space to work with, you will have plenty of space to store your cleaning supplies and equipment.

Great For Point-Of-Use Applications

The Rheem RTE 13 is designed for a small home. However, you can also utilize it for any point-of-use application, which means it can be connected to a separate bathroom or kitchen sink. The installation is pretty straight forward, but a licensed electrician or plumber must install the unit to receive the full warranty benefits. Point-of-use applications are great for public bathrooms, providing employees and clients with an endless supply of hot water.


  • Suitable for a small home
  • Great point-of-use application option
  • Maximum flow rate – 4.0 GPM
  • ½-Inch water connection, which is the standard size
  • Temperature controls located on the front panel
  • Compact, lightweight, space saving design
  • Weighs roughly 7.5 pounds


  • Requires a 240v electrical outlet and if your home does not have one, you will need to hire an electrician to install it in advance

Overall Assessment

The Rheem RTE 13 unit is suitable for a single shower or sink application. This is a small unit that can be installed on a wall or underneath a kitchen or bathroom sink. The installation will require hiring a licensed plumber, but this is general with all heaters unit.

#5 EcoSmart ECO 27 112.5 Amps Electric Heater Review

There is truly an abundance of amazing water heaters on the market. Nevertheless, a few EcoSmart ECO 27 Electric Tankless Water Heatertend to greatly outshine their rivals. The EcoSmart ECO 27 is definitely one of the brightest water heaters in the entire pack. The unit is reasonably priced and it will easily be able to accommodate the needs of most households.

This water heater is protected by a lengthy warranty, it is cost effective and it offers a digital temperature controller. This water heater will be explored in greater detail below.


While the ECO 27 is undoubtedly one of the most compact units on the market, it offers a great capacity. When used in warm weather, this unit can generally churn out 6 gallons of warm water each and every minute. This company suggests that the unit will be able to supply enough hot water to accommodate four showers and a single sink at once.

With this level of capacity, it is safe to say that the ECO 27 should be able to satisfy nearly any modern household. Just remember that its production may be decreased to 3 gallons per minute when used at lower temperatures.

Temperature Control

There is no doubt that you like your water a specific temperature. Your unique preferences will vary immensely from your friends and family members. This is one of the best aspects of the EcoSmart ECO 27 Water Heater. This unit is equipped with a digital temperature control panel.

You will be able to adjust the temperature by increments of one degree at a time. The control panel is also very sleek and totally user friendly. Just turn the knob and stop when the desired temperature appears on the screen.

Savings And Longevity

The EcoSmart ECO 27 is designed to provide the user with plenty of longevity and tons of cost savings. The company suggests that this unit will save the consumer a maximum of 50% on their overall water heating expenses. At the same time, this unit’s elements can be replaceable very easily. More importantly, it is protected by a limited lifetime warranty!


  • Covered by a limited lifetime warranty
  • Can reduce water heating expenses by as much as 50%
  • Includes a digital temperature control
  • Very compact for more installation freedom
  • Delivers a maximum of 6 GPM
  • Very sleek aesthetics


  • Weather can impact performance

Overall Assessment

Truly, the EcoSmart ECO 27 is definitely great in almost all categories. If 6 GPM will be able to satisfy your family, you should look no further than this unit. It will certainly help you reduce squabbles in your house!

What Is A Tankless Water Heater And How Does It Work?

In the past, almost all water heaters came with a tank. The tank was previously the most important component of the heater, since it would tell you specifically how much hot water you would have, before your water would begin to run cold.

The on demand heaters is very similar to traditional water heaters, but as the name implies, there is no tank. These units are frequently referred to as instantaneous or continuous flow water heaters. These names are used, because they’re capable of delivering hot water constantly and instantly.

These are a little different from the conventional models, because they’re not always capable of supplying hot water to an entire home. Instead, it may be necessary to have more than one in a single home, regardless of the property’s size.

How It Works

So, how do these heaters work? Unlike conventional models, they do not run continuously. Instead, they’ll remain off until the flow sensor detect water flow. Once the sensor has detected water, the unit will utilize a negative feedback loop to heat the water. The water will pass through a heat exchanger and this will cause it to become warm, before it is released into your home.

The heat exchanger, which is usually manufactured from copper, can be warmed with electricity or gas. Remember that there are some hybrid tankless heaters. These units combine the best features of tank-type and heaters.

Things To Consider Before Buying A Tankless Water Heater

While all tankless unit share a handful of similar characteristics, they’re also very unique in various ways. They’ll come in different shape and sizes. Plus, some will be more powerful than others. Therefore, it is absolutely pertinent to carefully research your options and ensure you’re able to find the best water heater for your unique requirements. Below, you will learn a great deal about the most important characteristics of your new on demand heater.

Dimensions Or Size

Before doing anything, it is absolutely essential to find out precisely where you intend to install your new water heater. Tankless models are far smaller than traditional water heaters and this will provide you with a greater amount of freedom. Nevertheless, the sizes of tankless models can still vary substantially.

Therefore, you need to determine whether you want to install the unit in a corner, under a sink or in a closet. Once you’ve made your decision, you’ll need to take measurements. Be sure that the figures are totally accurate. Then, you’ll want to use these numbers to ensure that you find a water heater that will fit the space in question.


It is also important to consider the overall cost of the water heater. Again, the prices can vary immensely. While some tankless varieties are fairly inexpensive, others are more powerful and far costlier.

In general, it is wise to spend a little extra to ensure that you get a better warranty and a longer lasting water heater. The easiest way to proceed is by first setting a limit for your investment. Figure out the maximum amount you can spend and do your best to remain below this limit.

Fueling Type

As mentioned above, these heaters can be powered by various means. Some will operate off of electricity, but many are also gas powered. Gas tends to be a little cheaper in terms of energy usage, but there is no doubt that a lot of consumers will try to shy away from natural gas or propane.

A lot of people are simply uncomfortable with the idea of using gas-powered appliances in their home. If you fit into this group, electricity will be a better option. Also, remember that gas units will require an exhaust line and this will make them a tad more difficult to install.

Determine Your Precise Needs

After you’ve scoured through the characteristics above, you’ll need to take the time to figure out what you’re actually trying to achieve. Do you want to invest in a powerful heater that will be able to supply hot water to each and every faucet in your home? Or, are you simply trying to deliver hot water to a single sink? Your answer will greatly alter your future decision.

This information will help you determine what GPM or gallons per minute rating you require. Determine how many faucets need to be supplied and how many gallons per minute they require. Then, you will be able to use this information to ensure you make the best choice.

Gallons Per Minute Rating

Above, you learned a little more about the gallons per minute rating that is found on all tankless unit. This is a fairly simply concept. The GPM rating is simply the gallons of hot water that the heater is capable of producing and delivering to your home in a single minute.

This figure will prove to be very important when attempting to find the best water heater for your family’s needs. Remember to carefully inspect your home’s setup and try to determine how many gallons of water your house needs. This information will give you a much better chance of making the right decision!

Energy Usage

A lot of homeowners will be interested in purchasing a unit in hopes of reducing their electricity bill to some degree. If you happen to fit into this category, you will want to pay close attention to the unit’s energy factor or thermal efficiency.

At the same time, you should purchase a unit that is Energy Star certified. Tankless are generally more efficient than the traditional models. Nevertheless, the precise energy efficiency can varies.

Put extra energy into this factor and it’ll pay off dividends in the long run.

Potential Tax Breaks And Other Incentives

Over the past few years, the United States government has been inclined to reward consumers that have taken steps to decrease their home’s energy usage. Believe it or not, investing in a tankless unit could actually benefit you in a big way.

Take the time to speak with the governmental officials in your local district to find out whether or not there are any incentives for investing in one of these models. The federal government may also provide you with a tax credit for such purchases. Be aware and always look for these types of discounts to help decrease the initial cost.

Temperature Controls And Safety

It is also important to make sure you choose a Unit that will be safe for your entire family. First and foremost, the unit you purchase should provide some type of temperature adjustment. This control panel will generally be found on the unit’s face. Just make sure you’ll be able to adjust the temperature to get the precise warmth that you and your family prefer.

Also, you should pay close attention to safety mechanisms provided with any unit. Some will prevent the water temperature from raising too high. Each additional safety feature will provide you with extra peace of mind.

Warranty Information

Whether you’re buying a new computer, car or heater, you should always place a lot of emphasis on the product’s warranty. It is best to avoid purchasing anything that does not come with a warranty! This is especially true when it comes to water heaters. The good news is that tankless heaters tend to have a much longer lifespan than the traditional models.

Still, it is pertinent to try to get the longest warranty you can find. Also, take note of the fine details. With many tankless hot water heaters, you’ll be required to have the unit installed by a professional. If you do not, the warranty will be voided almost immediately.

Therefore, you should make sure your technician is licensed, before allowing them to work on your water heater!

Advantage of Tankless Water Heater

So, why would anyone want to invest in one? The reasons are surprisingly diverse and enormous. These units provide a wealth of benefits that cannot be found elsewhere. Continue reading below to learn more about these advantages.

Lowers Energy Bill And Saves Water

When it comes down to it, most people invest in one of these models, because they want to save money. While these heaters tend to be a little more expensive in the beginning, they’re much more cost effective than the alternatives. These units do not run consistently and therefore will help you save money over a lengthy period of time. The exact cost savings will truly depend on the specific unit in question. And of course, these units will also save you water!

More Benefits:

The benefits are very diverse. These units are great for those that live a hectic lifestyle. If you work a busy schedule and often find yourself running late, you’ll love a tankless unit. This is the case, because you will not have to worry about waiting for the water to warm up. Turn on the faucet and you’ll receive hot water almost instantly. As long as the faucet is switched on, you will be provided with continuous hot water.

Sleek And Compact

Tankless models are also more versatile in terms of installation options. Thanks to their compact size, you could easily install one of these water heaters in a tiny closet or underneath a sink. The possibilities are nearly endless. Also, some of these units can actually be installed outside of the home. Finally, it is arguable that on demand tankless heater are much sleeker than their rivals.

Safer And More Precise

Finally, you should understand that these heaters are much safer than other models. They’re equipped with numerous safety mechanisms and they’re also capable of regulating the temperature more precisely. With a tankless model, you will not have to worry about the temperature raising dramatically out of nowhere.

Also, these models will help you reduce your family’s exposure to potentially dangerous dissolved toxic metals. Some of them are equipped with a temperature compensation valve. This will help to ensure that the pressure and temperature will remain precise even during continuous use.


The tankless heater is truly the way of the future. While the startup costs might be a little steep, these units will pay off in the long run. Just remember that you’ll need to put in a little bit of additional effort to ensure you get the best heater for your family’s unique needs. Research your needs, before carefully evaluating the water heaters on the market. And of course, you should refer to the reviews above for additional advice.