Table of Contents

Top 14 Best Tankless Water Heater Reviews & Buying Guide 2020

What Is The Best Tankless Water Heater To Buy In 2020?
Complete Review & Comparison

Best Tankless Water Heater Reviews & Buying Guide 2020 will Explain Everything To You.

A good supply of hot water is truly appreciated in a winter morning when it stops.  Usually, the system that provides the water works well for years without a hitch. But if you have chosen the wrong type of equipment, then the hitch can come at any time.  The water heater impacts your life in the cold winters more than you realize.  You are in the middle of the shower and all of the sudden water turns freezing cold. No one wants to be in a situation like that.

This heater can be a costly investment for homeowners. No matter you are renting or buying a house you need to equip it with a water heater. There are two main types of a water heater, i.e., traditional heater and Tankless Water Heater. Like most purchases, there is trade-off while deciding which one is better for you. A conventional heater preheats and stores 30-50 gallons of water in the tank. It utilizes a heat source (propane, gas, electricity) to warm up the water on demand.

Top 14 Best Tankless Water Heaters To Buy In 2020

S/noProduct NameTypeProduct DimensionsWeight in PoundsRatingPrice
01Rinnai RUC98iP Ultra SeriesPropane10 x 18.5 x 26 inches82 lbs4 out of 5 stars (4 / 5)Check Price
02TAKAGI TH3OSLPPropane21.8 x 15.6 x 33.2 inches69 lbs0 out of 5 stars (0 / 5)Check Price
03Takagi T-T-KJr2-OS-LP OutdoorPropane6.7 x 13.8 x 20.3 inches38 lbs4.1 out of 5 stars (4.1 / 5)Check Price
04Takagi T-K4-OS-NG Gas8.5 x 13.8 x 20.3 inches38 lbs4.1 out of 5 stars (4.1 / 5)Check Price
05Rinnai RUC98iN Ultra SeriesGas10 x 18.5 x 26 inches82 lbs4.5 out of 5 stars (4.5 / 5)Check Price
06Rheem RTGH-95DVLN Indoor Gas18.5 x 9.8 x 27.5 inches82 lbs4.2 out of 5 stars (4.2 / 5)Check Price
07Takagi T-H3-DV-N High Efficiency Gas11.2 x 17.8 x 24.9 inches85 lbs4 out of 5 stars (4 / 5)Check Price
08Noritz NRC661-DV-NG Indoor Gas6.7 x 13.8 x 23.6 inches39 lbs4 out of 5 stars (4 / 5)Check Price
09Rinnai V75IN 7.5 GPM IndoorGas14 x 9 x 23 inches49.6 plbs4.3 out of 5 stars (4.3 / 5)Check Price
10 Stiebel Eltron 36 Plus White Electric4.6 x 16.6 x 14.5 inches1 lbs4.4 out of 5 stars (4.4 / 5)Check Price
11Stiebel Eltron Tempra Plus 36 kWElectric16.5 x 4.6 x 14.5 inches19 lbs4.4 out of 5 stars (4.4 / 5)Check Price
12Stiebel Eltron Tempra 24 kW PlusElectric21 x 19 x 8.5 inches20 lbs0 out of 5 stars (0 / 5)Check Price
13EcoSmart ECO 27, 240 VoltsElectric3.6 x 17 x 17 inches16.8 lbs4.1 out of 5 stars (4.1 / 5)Check Price
14Rheem RTEX-18Electric4 x 15 x 19 inches8.5 lbs3.9 out of 5 stars (3.9 / 5)Check Price

What is a tankless water heater?

It produces hot water only when needed. It is also known as an instantaneous water heater and demand-type water heater. It, uses high-powered burners to heat water instantly and delivers it directly to your water faucet. Tankless water heaters are powered with gas, electricity or propane and deliver heated water directly to your shower rather than storing it in a tank. This type of water heater is energy efficient and gives you an endless source of hot water.

top tankless instant hot water heater guideThe initial cost of a it is larger than the conventional water heater. But the operational cost is lower. It works well for decades. It provides a continuous supply of hot water and reduces your bills as well. Guess what the best part is? It takes less space in your home. So, if there is no space in your apartment or house to install a conventional water heater, then a tankless water heater is the perfect option.

When you open the tap for water,It recognizes the need and starts the heating process. When the demand ceases, It stops the process of warming water and using energy. The benefit of a tankless water heater is that you are not limited to the amount a conventional water heater storage. You get warm water on demand for washing dishes, clothes or taking a bath. It saves up to 40% of cost.

With so many choices available in the market how would you decide what it is, the best for you? Of course, making the decision will not be easy at all when every company claims to manufacture the best equipment. To support you in making an informed decision, we have discussed a few Brands here, have a look!

Most efficient interior model:

A space-saving design that provides an endless supply of water heater is Rinnai RUC98-iP Ultra Series Propane Tankless Water Heater. It offers ease of installation with more venting options right out of the box. It has condensing technology with two heat exchangers.

Sized as per peak flow rate requirements:

TAKAGI TH3OSLP is compact due to having no water tank. It weighs 63 pounds.. You will nevermore run out of water when you install TH3OSLP in your Bathrooms.

Non-Condensing Gas Tankless Water Heater:

Takagi T-T-KJr2-OS-LP Outdoor is advanced from its prior version. It is suitable for outdoor installation as it gives better ventilation scope when installed outside the house. It provides a continuous supply of hot water.

Outdoor Gas water heater:

If you are looking for an outdoor natural gas tankless water heater, then T-K4-OS-NG  is the right choice. It has a built-in freeze protection and is extremely environment-friendly.

With Valves:

With the maximum water flow rate of 9.8 gallons per minute Rinnai RUC98iN Ultra Series, Natural Gas Tankless Water Heater is what a homeowner needs. It has a space saving design that means you can install it anywhere. it is one of the utmost heater in the market.

94-Percent Energy efficient water heater:

Rheem RTGH-95DVLN 9.5 GPM Indoor Direct Vent is a high-efficiency water heater. It has a hot start programming that minimizes the cold water bursts.  It provides faster  water at the tap. You never run short of hot water during a shower when you install Rheem RTGH-DVLN.

Natural Gas indoor water heater:

Takagi T-H3-DV-N High-Efficiency Indoor Natural Gas Condensing is well-suited for residential and commercial applications. It does not occupy enough space so you can install it anywhere. It has a flow rate of 10 gallons per minute. This units working is efficient.

Endless heated water:

With the high-efficiency machine, Noritz NRC661-DV-NG Condensing Direct Indoor Tankless Hot Water Heater Gives the endless supply . The maximum flow rate of the unit is 6.6gpm.  It uses up to 40%  less energy to warm the water.

Low Nox :

V75IN 7.5 GPM Indoor Low NOx is time saver with water whenever you need it. You need professional help to install the unit. It takes minimum space and provides maximum output.

Powerful Electric Tankless Water Heater:

Stiebel Eltron 36 Plus Tempra Heater has a digital display to show the temperature. The unit is designed for the high flow rate applications. The unit is indeed a popular choice for commercial and home applications.

Self-Modulating Technology:

Stiebel Eltron Tempra Plus 36 kW, with Self-Modulating Technology tankless electric water heater has a very smart design. It adjusts internal settings automatically. The unit takes the temperature control to another level.  It has a simple adjustment dial on the front to set it.

Excellent choice for Your Needs:

Tempra Plus, 24 kW With Self-Modulating Technology Electric Water Heater, is indeed an excellent choice for homes in the regions where the temperature can drop below 45o F. It has exclusive advanced flow control technology to adjust the flow of water.

Cuts the electricity costs:

EcoSmart ECO 27, 240 Volts Electric Water Heater : This heater cuts your electricity cost as well. ECO 27 is a reliable heater that comes with a lifetime warranty. The components are designed to be durable. The unit is small in size.

Consistent and endless water:

Rheem RTEX-18 240V 2 Residential Tankless Water Heater Heating Chambers offers continuous water. It is a professional classic and in small size. It has a digital temperature control. The unit is quite easy to install.

Which Are The Brands That Make Best Tankless Water Heater

Are you on a hunt for a new and Top Tankless Water Heater Brands for your home? If yes, then you have come to the right place. Tankless heaters are a very popular source of getting hot water for the entire house. And why not? You do need hot water in the cold, freezing months to use in bathrooms or washing clothes. But the real question here is that which one you should get as there are many manufacturers out there which produce wonderful water heating units.

Some of the brands produce premium quality water heaters, but of course, their prices are so high which make it impossible for you to buy and some provide tankless heaters on a reasonable price, but their quality is not as good as you want. So what to do? Well, don’t worry as here in this article we are going to discuss a few best brands which provide the best quality water heaters at a reasonable price. So let’s get into it!

Best Tankless Water Heater Brands Reviews:

As mentioned earlier, there are a lot of tankless heater brands working in the industry you can choose, but selecting one of them all which is trustworthy enough and can provide you the best tankless heater that can fulfill your hot water requirements can be difficult. We have tested and read a lot of online reviews about the best tankless  heater brands and compiled a list of a few best brands for you. They are expert and provide premium quality water heaters. You can select one according to your needs.

Top Brands of Tankless Water Heaters1. EcoSmart

The EcoSmart is one of the best favorite tankless heater brand for online shoppers. You can get a variety of options that are affordable and provide between 2 to 5 GPM. its products are about fifty percent less expensive than the other comparable companies. Many retailers including Home Depot, Amazon, are providing local support for this brand.

The products of EcoSmart feature advanced technology to fulfill your hot water requirements. The products of this brand have a very sleek and compact design so that you can easily mount it on the wall. To provide you the best savings on the electric bills as compared to the other brands, the products of this brand have patented self-modulating technology.

This brand is well-known for innovation and green energy products. The high-efficiency rating of the units is 99.8 %. Other Important features are digital temp settings that you just have to set once to have a continuous hot water supply at your preferred temp each day. For the tankless water heating units, this brand provides a limited lifetime warranty, and it also has exceptional customer care center which you can access anytime you need.

2. Navien

This company was founded in the year 2006 for focusing on the condensing technology zone in the tankless industry. And since then, it has become one of the best and fast growing companies in the industry. For maintaining the consistency of the brand, the company operates three training centers. Isn’t it amazing?

The professional contractors have the job of selling and fitting the Navien products for making sure that all of the customers are getting the hot water they need and desire. The Navien tankless heaters have a simple design and are very easy to install. The benefits of this includes premium condensing, eliminates cold water sandwich issues, to save you money has an incorporated recirculation pump, two heat exchangers that are stainless steel, and a lot more. If you are searching for a less expensive heater to install then Navien is your best bet.

3. Rheem

Raheem Water Heater Is the NO-1 available Brand out there. This amazing brand was founded in the year 1925 as a family business. The Rheem bros, Richard and Donald, started by producing home appliances and steel shipping containers and then kept including new stuff.

The company has manufactured everything from musical instruments to semiconductors. Rheem is now the largest brand in North America. it is within the Brands family that falls under the name of Rheem. Other companies are Richmond, Eemax, HTPG, and Ruud.

4. Rinnai

This brand has provided almost one hundred years of innovation in the United States manufacturing industry. it is one of the only tankless water heating units manufacturers which utilizes its own high-tech testing lab in Canada. This laboratory employs over six hundred certified lab technicians, development engineers, and research engineers.

All the rinnai’s devices meet or exceed ANSI and CSA standards. The HQ of Rheem is in Japan with eighty-five plus sales offices and twenty subsidiaries in thirteen countries. These are all done for providing complete and satisfactory customer care from buying to installing. it’s support level has made it to become one of the best leading  brands.

its products come in with multiple venting options sleek design. If you are searching for the best tankless water heater for commercial and/or home use, then this brand is the best option to choose. However, the installation of  its products can be a little tricky; therefore it would be a good choice to leave that part for a professional plumber.

5. Takagi

People who are looking for the best heating systems should also pay attention to this brand. The Takagi’s Brand is available at a comparatively affordable cost. Despite the lower cost, Its products also have many amazing options which make these brands stand out.

These are only sold by the accredited contractors which is one of the best factors that make It more unique. It means that you will deal with the trained professionals who are assigned in your area for helping you with your new tankless water heater purchase.

It also means that if you are buying Takagi product online, you have to be very careful. If you buy a its unit from a non-licensed contractor, it would not be covered under the published warranty.

This brand also offers a broad series of online help choices for owners, from plumbing charts to the troubleshooting instructions. There’s also a complete set of information for the experts accredited by The Company to sell and fit the heating units.

6. Noritz

Noritz is one of the best leading tankless heaters brands in the industry. The business was started about sixty years back. In 1981, this brand introduced an electronically controlled tankless device for the first time. Since then, it has been one of the best leading brands in development and advanced water heating units manufacturer.

This brand presents a total of 3 diverse systems for providing houses with hot water using the customized approach. The Noritz systems have more flexibility than many other systems available out there, including indoor or outdoor installation, without having to compromise on making process quality.

This brand is also one of those that own each aspect of the making process. Every device covers a non-prorated twelve years of warranty. The tankless heaters manufactured by this brand offer a lot of advantages to both commercial and residential users. Noritz devices are convenient and easy to use, environmentally friendly, offer significant energy saving, are long-lasting and reliable, and guarantee that the users will get clean and fresh hot water whenever they will need.

14 Best Tankless Water Heaters To Buy In 2020

After scouring the market in search of the top tankless water heaters for home or commercial use we have made a list. There are many options to choose from.  Well, choosing a tankless heater should not be so confusing, so here we have given an honest synopsis of some of the best , so that you make an informed decision. Without further ado let’s have a look at each of them separately:

Rinnai RUC98iP Ultra Series Propane Tankless Water Heater:

If you are seeing for a tankless water heater that provides the homeowners with an endless supply of hot water and is environment-friendly, then Rinnai Ultra Series line is the right choice.  it is with a space saving design. It is easy to install with more venting options out of the box. It works only when hot water is needed. It means it reduces utility cost .

Rinnai RUC98iP 2020 Features:

Let’s check it out:

  • It delivers a continuous supply of hot water to multiple fixtures simultaneously.
  • Space saving design allows the users to install it anywhere.
  • For a healthier environment and cleaner air, This Propane Tankless Water Heater has Earth-friendly technology .
  • It is available with multiple venting options including PVC/CPVC.
  • It has the lock function that prevents accidental changes to the temperature.


This Ultra Series delivers innovation and provides homeowners with an endless supply of hot water in freezing winter mornings. Here are the technical specifications of the product:

  • Brand: Rinnai
  • Model: RUC98iP
  • Installation type: Indoor
  • power factor: 0.95
  • Minimum activation rate: 0.4 GPM
  • Hot water flow rate: 0.26 – 9.8 GPM
  • Voltage: 120 volts
  • certification: Energy Star

No matter what kind of machine you are buying make sure that your money is not wasted. It is always helpful to know the pros and cons of a tankless heater before making a final decision to buy.

Never run out of water in a cold morningIt takes a long time for the hot water to reach the faucets.
Condensing with ultra-efficiency —
Easy to install —
Indoor heater —
Space saving design —

TAKAGI TH3OSLP Tankless Water Heater (Best Heater)

Tankless water heaters are also known as the on-demand water heater as they supply water only when Required. There is no water tank . Before selecting a heater, you should identify your needs and then decide which Heater will be suited for your home or commercial building.

TH3OSLP is a high-efficiency propane tankless heater . It has no tank that means you can install it anywhere. There is no pilot light to keep a check on, and the computerized safety option make it the right choice for your home. It is easy to install, and once it is installed, you will never run out of  water in during a shower.  TAKAGI TH3OSLP 2020 can heat 10 gallons per minute.


You can’t decide until you know everything about a product. Here are the Details of TAKAGI TH3OSLP:

  • It is a perfect water heater for light residential heating applications.
  • For constant temperature monitoring, it has inlet and outlet thermistors.
  • It is capable of heating 3-4 consecutive showers with no downtime.
  • It comes with a remote control for easy adjustment of heater settings.
  • The product has multiple safety options to protect against overheat and freeze.


  • Brand: TAKAGI
  • Type: Tankless heater
  • Product: TH3OSLP
  • Power source: liquid propane
  • Energy Star: complaint
  • Material: copper

You have decided to install a It  because it reduces the utility bills. Tankless water heaters take less space, so it is a great option when you live in a small house. Takagi TH3OSLP  has the following pros and cons:

Since it is small in size so you can install it anywhere —
It provides enough supply of  heated water to run three showers at a time. —
It is highly efficient. —

It uses less energy to provide hot water so those who love to take showers will adore it.

Takagi T-T-KJr2-OS-LP Outdoor Tankless Water Heater (Smallest Water Heater In The Line)

The days had gone when people used to install bulky water heaters. Old Heater stores water in there tanks, and they use energy to keep that water warm. It increases the cost of utility bills. They occupy enough space. It does not take enough space as they do not have tanks. No matter you live in a small apartment or big house These water heaters are easy to install.

Takagi T-T-KJr2-OS-LP is small in size but powerful unit that can meet the hot water needs of small American homes and apartments.  It is a non-condensing gas \ and is suitable for outdoor installation due to the fact that it provides better ventilation scopes.

Takagi T-T-KJr2-OS-LP 2020 Features:

Following are the detailes of Takagi T-T-KJr2-OS-LP tankless water heater:

Compact size:People prefer tankless water heaters over traditional ones due to many reasons. Takagi T-T-KJr2-OS-LP is small in size and handy for homes that are not big enough.

Power saving: It has the self-modulating heating system. It turns on the burner when it senses the flow over 0.75 gallons per minute. The best part of this water heater is that it consumes less energy to heat the water.

Safety Feature: The product has a freeze protection option as Takagi T-T-KJr2-OS-LP is an outdoor tankless water heater. It also has a surge protection option and overheats protection feature.

Remote Control: To control the temperature from a distance, it has a remote control and a digital scale.

Takagi T-T-KJr2-OS-LP Tankless Water Heater Specifications:

  • Brand: Takagi
  • Model: T-T-KJr2-OS-LP
  • Type: Tankless water heater
  • Max Flow Rate: 6.6 GPM
  • Weight: 33 lbs
  • Water Pressure: Min. 15 psi , Max. 150 psi
  • Dimensions: 20.5 x 13.8 x 6.7 inches
  • LP Input: Min. 19,500 Btu
  • LP Input: Max. 140,000 Btu

Best Takagi T-T-KJr2-OS-LP :

Now it is the time to see what pros and cons of Takagi T-T-KJr2-OS-LP.

Air-Fuel Ratio RodHot water insufficiency
Copper heater
Usable up to 6000 ft altitude
0.82 energy factor
Includes internal freeze protection
6.6 GPM max flow rate

Takagi T-T-KJr2-OS-LP Outdoor water heater needs proper ventilation for safety reasons.  It provides water for you to take a shower in the cold weather. Make sure you know what your requirements are before buying T-T-KJr2-OS-LP.

Takagi T-K4-OS-NG Tankless Water Heater (Quality Water Heating Device)

These tankless water heaters are non-condensing and are designed to fulfill the needs of high demanding homes. Takagi water heaters are built to provide great comfort to the users. They take less space and save energy. It makes tankless water heaters better than traditional ones.

Takagi T-K4-OS-NG is a compact whole home water heater that can also be utilized for commercial applications.

Takagi T-K4-OS-NG 2020 Features:

When you take a look at this product, it becomes easy to decide whether it is worth buying or not. With so many choices available in the market it is not easy for you to decide which water heater is appropriate for you.

We are providing an honest review of some of the best tankless water heaters so that you could buy the appropriate one for your home. Here are a few remarkable Details of Takagi T-K4-OS-NG:

  • It has a maximum flow rate of 8.0 gallons per minute.
  • It comes with a remote control to adjust the water temperature.
  • T-K4-OS-NG includes overheat, freeze, troubleshooting diagnostic codes.
  • It reduces utility bills.
  • The product is energy star qualified.

T-K4-OS-NG Tankless Water Heater Specifications:

What are the product specifications of the Takagi T-K4-OS-NG Outdoor water heater? Let’s have a look:

  • Brand: Takagi
  • Product: T-K4-OS-NG
  • Min BTU Rating: 11,000 BTU/h
  • Max BTU Rating: 190,000 BTU/h
  • Fuel Factor (Natural Gas): 0.82
  • Weight: 34.6 lbs
  • Ignition: Electric Ignition
  • Installation type: Outdoor only
  • Fuel Type: Natural Gas
  • Water Pressure: 15 – 150 psi
  • Warranty: 5 Year Warranty on Parts
  • Warranty: 12 Year Ltd. Warranty on Heat Exchanger

Let’s check the positive and negative points associated with Takagi T-K4-OS-NG Natural Gas Outdoor:

Advanced design
It does make noise.
High power and efficiency
Plenty of hot water
Temperature control for convenience
Self-diagnostic system for easy troubleshooting
Flexible venting

Rinnai RUC98iN Ultra Series Natural Gas Tankless Water Heater (A Definite Leader)

Water serves as the essential source in daily life. You need water to drink, wash dishes, and doing laundry, etc. If you live in a country where there is freezing cold weather outside, then you need a continuous supply of hot water. Traditional water heaters store water in the tanks, but they increases the bills and are not environment-friendly. Also, they occupy a large space, so it becomes impossible for people living in small homes to install it.

On-demand water heaters can provide a continuous supply of water. So, tankless water heaters are perfect for those who do not have enough space in the home and want to save energy as well.

RUC98iN : It has the buttons to lock the temperature and control gas flow. It is not light in weight and is bigger than most  water heaters. RUC98iN offers multiple venting options.

Rinnai RUC98iN 2020 Features:

It offers the following features:

  • It enables you to control the temperature of hot water.
  • You can lock the temperature to prevent unauthorized access.
  • It supplies sufficient hot water to multiple faucets and showers.
  • It has a space saving and sleek design that allows you to fix it anywhere in the home.
  • RUC98iN roughly has the size of a largish carry on suitcase.
Consumes less energyThe temperature may drop when it serves more than one water outlet.
Compact and space saving sizeThe unit may take a while to heat the water
Reduced risk of contaminationExpensive
Intuitive temperature controlDifficult to install
Extremely quiet during operation,Requires regular maintenance
Provides hot water when you need it
The unit can serve up to five showers

Rheem RTGH-95DVLN 9.5 GPM Indoor Direct Vent Tankless Water Heater (Massive Output Capacity)

You live in a cold climate; then you can’t even imagine running out of hot water during a shower. You need hot water to do the dishes and laundry etc. So, a tankless water heater is the appropriate appliance for your home. It hold several advantages. They do not take up adequate space and are environment-friendly. Guess what the most interesting part is? Tankless water heaters reduce your energ bills as well.

Rheem RTGH-95DVLN runs on natural gas and has electric ignition. It covers the temperature range of 85° C – 140°C.

Rheem RTGH-95DVLN 2020 Features:

Rheem is one of the most recognized water heater brands in the industry. According to the people who have installed it in their homes say that it actually provides an endless supply of  water. Now let’s check the Details of Rheem RTGH-95DVLN 2020:

  • The unit is energy efficient and provides 94% efficiency.
  • It produces 9.5 gallons per minute, hot water. It is a perfect option when you have a large family.
  • The unit comes with a digital remote control unit.
  • It has built-in freeze protection.
  • It gives a powerful performance.
  • The unit comes with a five years limited warranty on the parts and twelve years limited warranty on the heat exchanger.
  • It also has the overheat film wrap feature to provide protection if an exchanger breach happens.
  • The self-diagnosing system with the digital display warns the users about any malfunction.
  • The unit Creates low level of Nox emissions, so it is an environment-friendly .

Rheem RTGH-95DVLN Tankless Water Heater Natural Gas 2020:

You have chosen to switch from a traditional water heater to tankless water heater. Well, it is a right decision, but before buying Rheem RTGH-95DVLN Tankless Natural Gas Water Heater 2020 have a look at its pros and cons:

An ideal solution for homes that require a constant supply of hot water.It is not suitable for smaller households.
The freeze protection technology makes it best to be used in the coldest of climates.It is on the expensive side.
Its small size makes it perfect for homes with less space.

Takagi T-H3-DV-N High-Efficiency Indoor Natural Gas Condensing Tankless Water Heater

There are various types of water heaters available in the market. One of them is Takagi T-H3-DV-N. It is an indoor condensing tankless water heater that can produce ten gallons per minute which makes it a solution for “big hot water needs.” It provides a continuous supply of hot water without any issue. It is one of the best selling Product.

When there is cold water in pipes the heater and internal burner fire up, it runs on natural gas and is more energy efficient than other units that run on natural gas. The unit is a bit tricky to install so you should get the professional help.

Takagi T-H3-DV-N Indoor Natural Gas Tankless Water Heater Features:

  • The device provides surge protection, troubleshooting diagnostic codes, overheating management and freeze control features.
  • Whenever there is cold water in the pipes, the heat exchanger and internal burner detects it.
  • The unit is energy star qualified and is durable.
  • It comes with a long time warranty.
  • The manufacturer has made it hard enough, so it is good for heavier purposes.
  • It has a space saving design.
  • It is a cost-saving unit due to its self-modulating heating mechanism.

Thanks to the internet. It has made it easy for consumers to read the reviews of a product before buying it. Now we will see the positive and negative points of Best Takagi Natural Gas Tankless Water Heater:


  • Suitable for big family
  • 95 energy factor for Natural Gas
  • The maximum flow rate of 10.0 GPM
  • No heated air that will come out of it.
  • No Running Out of Water
  • Straightforward Installation
  • Low Carbon Footprint
  • Powerful unit that can serve commercial as well as residential properties
  • No need for fancy vents due to the condensing system


  • GPM might pause in colder climates
  • The hefty initial price tag
  • Installation can be complicated
  • Poor Repair Conditions
  • Reports of Premature Breakage
  • Does not work well on low sized pipe setting

Noritz NRC661-DV-NG Condensing Direct Indoor Tankless Hot Water Heater

Noritz NRC661-DV-NG is a gas-fired tankless water heater. Noritz Company has a reputation in the industry for producing low priced water heaters. Noritz NRC661 is designed for small homes. The weight of the unit is thirty-eight pound. It is light in weight and moderately powerful still it is a great choice than a traditional water heater. It heats the water on demand using natural gas, but it has an electric ignition as well.

The unit comes with basic temperature control. However, the user can get an optional remote control with a digital display too. The unit consumes 54 watts of electricity when active. Noritz water heaters are eco-friendly, space saving and economical.

Noritz NRC661-DV-NG Tankless Hot Water Heater Features:

  • The unit is smaller than carry-on luggage which means you can install it any where.
  • Since there is no storage so your hot water will not be stored in a rusty tank.
  • It has a high elevation adjustment feature.
  • It provides freeze protection.
  • Also, it features a flame sensor, fan rotation detector, lightning protection device and overheats prevention device.
  • The temperature lockout feature is also included.
  • The unit can last up to fifteen years (more than the traditional water heater).

Noritz NRC661-DV-NG Tankless Water Heater 2020 Specifications:

  • Brand: Noritz
  • Model: NRC661-DV-NG
  • Type: Condensing Direct Indoor Tankless water heater
  • Fuel source: Natural gas
  • Energy factor: 0.91
  • Vent type: Direct Vent
  • Mounting location: Indoor wall mounted
  • Thermal efficiency: 93%  efficient
  • Electrical consumption: 54 Watt
  • Water pressure required: 15-150 PSI

Best Noritz NRC661-DV-NG Tankless Water Heater 2020:

It is Safe to use.The unit needs electricity.
High efficiency of the unit makes it a perfect water heater for homes.The unit does not come with the remote
It is best for small families.It does not meet the hot water needs of the big families.
It has Low Nox design.
Built in design allows temperatures to rise to 140F

Rinnai V75IN 7.5 GPM Low NOx Tankless Indoor Water Heater (Value And Comfort)

It is so annoying when you open a tap in the winter morning to wash the dishes, and the cold water comes out. You need to install a water heater that not only takes occupies less space but also reduces the energy bills. What can be better than the tankless water heaters that are compact in size, easy to install, and provide a continuous supply of hot water?

The technological advancement has led people to the tankless water heaters that are portable. Today, people have small homes, or they live in small apartments so, there is no space for conventional water heaters. Rinnai V75IN water heater is specifically designed for small to medium homes. When you install it, you never run out of hot water again. It does not break your budget as well.

Best Rinnai V75IN Tankless Natural Gas Water Heater Features:

It is highly essential for the consumer to know what features the product he is going to purchase, offers. So, here we have discussed a few Here:

  • Designed for indoor use only
  • Electric ignition eliminates the requirement for a pilot light
  • it has concentric direct vent system
  • Isolation valves are sold separately
  • Allowed to install in mobile homes
  • Integrated temperature controller
  • Ten-year residential warranty on heat exchanger, one year warranty on labor and five years warranty of parts
Rinnai V75IN 7.5 GPM Indoor Specifications:
  • Brand: Rinnai
  • Model: V75IN 7.5 GPM
  • Amperage: 4 Amps
  • Voltage: 120v
  • Ignition Type: Electronic
  • Fuel Type: Natural Gas
  • Minimum flow rate: 0.26 GPM
  • Approved for commercial use: No

Rinnai Tankless Gas Water Heater:

Ergonomic designExpensive
Easy to install
Easy to maintain
Flexibility to use in mobile homes
Powerful performance

Stiebel Eltron 36 Plus White Tempra:

No matter what temperature is outside the house, tankless water heaters provide a continuous supply of hot water without fail. Wash dishes, clothes or take a shower, you will never run out of hot water in the cold weathers. Stiebel Eltron 36 is one of the most powerful water heaters available today. It is a popular choice of homes and commercial applications.

Best Stiebel Eltron Tempra 36 Plus Features:

  • It has the advanced microprocessor technology that constantly monitors the temperature.
  • Digital temperature control and display allow the user to control and manage the temperature.
  • The unit features an advanced flow control that automatically controls the flow through the water heater.
  • It provides hot water at a constant temperature from 68 to 140 F.
  • The unit has a sleek design thus making it possible for you to install anywhere.
  • There is no venting required when you install Stiebel Eltron 36 Plus Tempra.

Eltron 36 Specifications:

  • Brand: Stiebel
  • Model: Eltron 36 Plus Tempra
  • Type: Tankless water heater
  • Certification: Not available
  • Product dimensions: 4.6 x 16.6 x 14.5 inches
  • Installation method: mounting
  • Batteries included: No
The unit has a smart design.Some buyers are not impressed by the automatic management system.
It automatically control its internal settings to the amount of power required.The price of the unit is on the high side.
It does not waste energy and the water flow in times of high use.

Stiebel Eltron Tempra Plus 36 kW:

Due to the existence of several brands in the market getting the best tankless water heater has become a quite hassle. We have given an honest review of some of the best tankless water heater here to make the process a little hassle-free for you. If you are looking for a water heater that is eco-friendly and performs well then Stiebel Eltron Tempra Plus is the right choice for you.

Stiebel Eltron Tempra Plus 36 kW Features:

Following are some remarkable features :

  • It has proven to be a reliable tankless water heater for home use.
  • The unit has digital temperature control.
  • It has a sleek design that fits everywhere and does not occupy much space.
  • No venting required when you install Eltron Tempra 36 KW.
  • It reduces energy bills up to 20% .

 Tempra Plus with Self-Modulating Specifications:

  • Brand: Stiebel Eltron
  • Model: Tempra Plus 36 kW
  • Type: Ground temp above or below 60°F
  • Amps Required: 150
  • Weight: 19 lbs
  • Household Amperage Required: 300 amps
  • Installation Location: Indoor
  • warranty: three years limited

Stiebel Eltron Tempra 24 kW Plus Tankless Electric Water Heater:

A tankless heater that is designed to be energy efficient that decreases the bills up to 15%  is Stiebel Eltron Tempra 24KW Plus. There are soft-touch control buttons and a knob to adjust the temperature of water. The LED screen displays the current water temperature. The cost of installing Stiebel Eltron Tempra Plus 24 kW is slightly above average. Advanced flow control technology reduces the water flow automatically when multiple faucets are drawing hot water. It helps you get hot water continuously.

Stiebel Eltron Tempra 24 kW Plus Reviews 2020 Features:

What are the features of Stiebel Eltron Tempra Plus 24 kW? Let’s see:

  • It has a sleek design so you can fit it anywhere.
  • It has proven to be a reliable water heater.
  • The best part of the unit is that no venting is required.
  • It has digital temperature control.
  • The unit is 99%  efficient, and it saves 15-20% of the cost of your bills.
  • It has easy to read digital display.
  • It has self-modulating technology .

Stiebel Eltron Tempra Plus tankless electric water heater Specifications:

  • Brand: Stiebel Eltron
  • Model: Tempra 24 Plus
  • Materials: All Copper Internals
  • Amperage: 100A
  • Energy Efficiency: Up to 99.5%
  • Wattage: 24kW
Stiebel Eltron Tempra Plus tankless electric water heater :

Now let’s discuss the pros and cons it has:

Fair priceNone
Compact size
0.5 GPM activation flow rate
supports existing heaters

EcoSmart ECO 27, 240 Volts Electric Tankless Water Heater Review (Save up to 50% of energy cost)

Installing a water heater in the house is a necessity, not a luxury. You need hot water in the winter. So, buying a tankless water heater is always a great idea as it takes less space and is fuel efficient. EcoSmart ECO 27 provides the perfect water temperature in the winter mornings to do the laundry, dishes and taking a shower. When you install it your power bill significantly goes down.

EcoSmart ECO 27 Electric Tankless Water Heater Features:

Here are some exciting features of EcoSmart Eco 270 tankless water heater:

  • The components of Eco 27 are designed for durability, efficiency and easy replacement.
  • The unit has advanced design that looks appealing.
  • It is compact in size, so it does not take much space.
  • It saves up to 50 % of your fuel cost.

EcoSmart ECO 27with Patented Self Modulating Technology specifications:

  • Brand: EcoSmart
  • Model: ECO 27
  • Voltage: 240 volts
  • Pipes fittings: 3/4 inch NPT
  • Dimensions: 17H x 17W x 3.625D inches
  • Electrical requirements: 27 kW, 240 volts
  • Required Breaker Quantity: Three 40 Amp Double Pole
Patented Self-Modulating TechnologyUnit requires a lot of power It may take a week to get used to settings
Unit is 99.8% energy efficient
Ease of installation
One of the best and most responsive customer service
Lifetime warranty

Rheem RTEX-18 Electric Tankless Water Heater Review (Energy Efficient)

It is a water heater that is designed to meet the hot water needs. It has the self-modulating unit that adjusts the water temperature to reach the desired one. It is not that difficult to install and offers an easy replacement. It is a durable water heater that has a sleek design. It does not look weird when installed inside You Home.

Rheem RTEX-18 Reviews 2020 Features:

  • The unit is simple and easy to install.
  • It has a digital temperature display.
  • It has a compact and modren design that goes well with the aesthetical beauty of the house.
  • The unit has the external controls to adjust the water temperature.
  • Digital temperature display shows the current temperature of the water.
  • To increase durability, it has robust copper immersion heating elements.
  • It provides a consistent supply of hot water.
  • The unit is 99.8% energy efficient.

Best Rheem RTEX-18 Reviews 2020 Specifications:

  • Brand: Rheem
  • Model: RTEX-18
  • Voltage:240V
  • Power: 18 kW
  • Water Connection:3/4 Inch
  • Power Source: Electric
  • Max Flow Rate: 7 Gallon Per Minute
  • Required Breaker: 2 40Amp

Best Rheem RTEX-18 Tankless Water Heater Reviews:

Highly Fuel efficientWarranty is insufficient
Reduces your regular electricity billsConsumes a lot of Power
Easy to installWhen shower and sink are in use the water becomes cold sooner
Stylish design
On-Unit controlling feature
Self-modulation unit
Offers maximum temperature control

Things To Consider While Buying A Tankless Water Heater

It is not a luxury; it is a necessity particularly in the areas where freezing temperature makes it impossible to use cold water in the morning.  Going tankless with the water heater is indeed a great idea. These haters are rated by the maximum temperature rise possible at the given rate. If you have made up your mind to go tankless with your water heater, then determine the flow rate and the temperature rise that is needed for its application in the office or home.  A tankless water heater lasts longer than a tanked one. An on-demand water heater provides an unlimited supply of hot water.

Guess what the best part is??? These types of water heaters have easy maintenance. There is no tank in the heater means there is no need to store the hot water. Just turn on the hot water faucet and enjoy the unlimited supply hot water to complete your shower, wash the dishes and do laundry. The tanked water heaters continuously use energy to heat and reheat water heaters, but a It saves money on your bills.

Buying a water heater is not always easy especially when you are looking for one that is  working  well, is environment-friendly . Here are the things you need to consider or look for while buying a tankless water heater:


The first thing to be considered while buying a tankless water heater is the capacity. It is small in size, takes less space and is 22 % more efficient than tanked water heaters. Turn on the heater, and it will deliver the hot water to showers and faucets.


Not every tankless water heater is easy to install. They are more advanced, so you need the services of a professional plumber to install them. The cost of installation is an important factor you should consider while deciding to buy it.


Tankless water heaters have more parts than a tanked water heater. It means these water heaters might have more repairs that mean an increase in the repair cost.


Another significant point you need to consider is whether the water heater you are buying is energy efficient or not. A conventional water heater can save up to $20 per year while as tankless water heater $95 per year. So, why not a water heater that is energy efficient.

Space saving:

Today, most people live in small homes and apartments where there is not sufficient space to install conventional/traditional water heaters. A conventional water heater requires several square feet of space. These are wall mounted and let you install anywhere easily.


Purchasing a water heater is indeed a great investment, but you should be aware of the lifespan of the water heater you want to buy.  Old Heaters has a typical lifespan of twelve years. It is perfect if maintained properly as it has a lifespan of 20 years.


Though many manufacturers claim that their tankless water heaters adequately provide hot water to the entire house, it is not true. But it is also a fact that tankless water heaters are far better than the traditional water heaters that occupy much space in the house and are not stylish at all. Tankless water heaters save space and energy. Buy an adequate size of water heater after determining your requirements.

Electric water heaters are indeed a fantastic investment, but you can also choose a water heater that runs on natural gas. It was not easy to search for tankless water heaters, but we did it to make it simple for you to pick the right sized appliance for your home. All you need to do now is to weigh the pros and cons and take a look at the Product details of each one to decide which one best suits your needs.You can also check our blog section to get information about the problem and their solutions of tankless water heaters. Stay tunned to our website for the detailed reviews of each product so that you can buy one that best suits your needs. You can check them on Amazon to see the prices.