Top 10 Best Hot Water Heater Reviews 2019 – Buying Guide

It may sound easy but is not that much simple to face the cold water. Even if we spend with cold water for less time, it’s hard to deal with the stream of cold water coming out of the pipes. Most of the problems we face with the cold water are in the Winter season. Instead of doing the things forcefully with this cold water, why don’t we enjoy the things with warm or hot water? Here comes the real use of the best Water Heater. To be frank it is not easy to choose any home appliance as there will be many factors and things to consider before buying one. We all look for the best one in our budget. For that, we need to do a lot of research. All such procedures seem difficult right! As you are here you can now leave all such worries.

We can say that it is challenging or may be difficult to take the shower with the cold water particularly in the winter season. There are several companies offering the best water heaters to give you a great bathing experience. Also, there are some brands which offer Water heater with less quality or fewer features. So, it is not that easy to choose the best one among all these companies. It requires more patience and time to select the best one. With 72 hours of research, we have sorted top 10 Water Heaters here.

Best Water Heater Review

As I said below, there are some factors which you need to consider while buying like Electricity consumption, warranty, durability, price, safety, and more. The requirements will not be the same for the people. So, we can’t show a single product and say that this is the best hot water heater for all types of customers. As per brand, quality, features, and specifications, we have listed these 10 best geysers of best brands and different features. The products sorted here have surpassed all the factors mentioned above in every way.

To know in detail about these factors check the Water Heater Buying Guide by scrolling down the page. You need to choose the best Geyser because this single step can make a big difference in your budget. Along with factors, you need to know that are different types of Water Heaters, like Tankless, Gas, Electric, RV, Tank, Solar Geysers. In this list, you can find both tank and tankless water heaters which meets the standards of all customers. First, check the buying guide, decide what features you need, refer the top 10 list and finally choose the best one.

Top 10 Hot Water Heaters

  1. Takagi T-KJR2-IN-NG Indoor Tankless Water Heater, Natural Gas
  2. Rheem RTGH-95DVLN 9.5 GPM Indoor Direct Vent Tankless Natural Gas Water Heater
  3. Rinnai RUC98iN Tankless Water Heater
  4. Rheem RTE 13 Electric Tankless Hot Water Heater, 4 GPM
  5. Ecosmart Eco 11 Electric Water Heater Tankless
  6. AO Smith Vertex GPHE 50 Heater
  7. Rheem Prestige G50-40N RH67 PD
  8. Rheem Performance Platinum 50 Gal Heater
  9. Bosch Tronic 3000 T 4-Gallon Electric Mini-Tank Water Heater
  10. AO Smith XCG-50 ProMax Tall Gas Water Heater, 50 gal

Takagi T-KJR2-IN-NG Indoor Tankless Water Heater, Natural Gas

Takagi is the popular and best water heater brand in providing Heaters. That is the reason why Takagi T-KJR2-IN-NG Indoor Tankless Water Heater in this top 10 list. In the name itself, you can see that it is a Tankless hot water heater. Another interesting thing is it a Natural Gas type heater. So, if you are the one who loves the natural products you can go for this Takagi T-KJR2-IN-NG. This can be converted into a direct-vent unit. One thing you need to remember is, you need to do only Indoor installation with this product.

The maximum flow rate of this unit is 6.6 GPM and the BTU is 140000 with Voltage 120V AC. It requires 4-inch III category stainless steel venting. Also, there is another feature to say, that is, for constant temperature monitoring there are Inlet and Outlet thermistors. In Takagi line-up, this T-KJR2 is the smallest unit and is perfect for the small apartment or light residential units. It is also useful in radiant heating applications. Compared to the above mentioned products, this Takagi T KJR2 INNG weighs more. Let’s see the technical details below.

Takagi T-KJr2-IN-NG Tankless Gas Water Heater Image

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Warranty: 10 years for heat exchanger and 5 years for parts (Residential). 5 years and 3 years for commercial applications. Dimensions: 6.7 x 13.8 x 20.3 inches. Weight: 37 pounds.

  • 10 years warranty.
  • Natural Gas Tankless water heater.
  • Perfect for residential applications with gas inputs of 140000 BTU.
  • Constant temperature monitoring available with Inlet and outlet thermistors.

  • It won’t provide hot water instantly.
  • Costs a bit more for installation.


Rheem RTGH-95DVLN 9.5 GPM Indoor Direct Vent Tankless Natural Gas Water Heater

As a solution to several cold water problems, this Rheem RTGH-95DVLN Natural Gas Water Heater was designed. There is no need to worry about the winter when you have this Rheem RTGH-95DVLN in your home. To know why you need to look at these features. The first and foremost thing is it is 94 percent energy efficient. It comes with stainless-steel condensing heat exchanger which protects the device well. For more safety and to increase energy efficiency, the intelligent electronic controls designed. Also, there is a two-pipe direct vent system for PVC pipe and also comes with a built-in electric blower.

There is Guardian OFW (overheat film wrap) in this Rheem RTGH-95DVLN Hot Water Heater and EZ-Link cable is also available which helps in connecting 2 tankless units to work as one. Also, for easy installation and service, there is a self-diagnostic system. Another thing is you can find the digital display which shows maintenance codes and temperature setting. It is energy star rated and has the Built-in Condensate Neutralizer. There is also a Water saving setting, which saves 1100 gallons of water per year.

Rheem RTGH-95DVLN Water Heater Image

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Coming to physical specifications of this Rheem Water Heater, Dimensions in inches are 18.5 x 9.8 x 27.5. Weight is 79 pounds. Has the limited warranty period of 10 years on heat exchanger and 1 year on parts.

  • Comes with Indicator
  • High Energy efficient
  • Water savings setting
  • Energy star rated and tankless heater.
  • Best water flow rate
  • Freeze protection technology available.
  • Warranty upto 10 years.

  • Costs a bit more.


Rinnai RUC98iN Tankless Water Heater

We all know that Rinnai is the best brand in providing water heaters for our home. So, there is no wonder that one of the best water heaters is from this Rinnai company. That product is nothing but the Rinnai RUC98iN Tankless Water Heater. It has the energy factor of upto 0.96 liters and a uniform energy factor of 0.92. You can get a continuous flow of hot water with its 199000 max BTU. It was specially designed with space saving technology which allows the indoor installation type. This Rinnai Water Heater comes with the PVC or Concentric venting option.

It comes with the condensing technology which delivers more efficiency and takes the tankless heating to next level than ever before. One amazing feature of this Rinnai RUC98iN is, it has 95% thermal efficiency natural gas. You can also use this heater for commercial purpose. It has multiple venting options and uses natural gas or propane to work. The design looks compact and sleek but it is not a lightweight heater. This has a digital display, power button, gas control buttons, water temperature. To prevent unauthorized access, you can lock the temperature button.

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Now let’s see the Physical Specifications of this Rinnai RUC98iN Indoor Gas Tankless Water Heater. Dimensions: 10 x 18.5 x 26 inches Weight: 82 pounds. Warranty of this product is limited 12 years on heat exchanger and 5 years on parts. For the commercial purpose, the warranty will be Limited 5-years on the heat exchanger, 5-years on parts.

  • Residential and Commercial applications.
  • Saves space.
  • Won’t make any sound.
  • Saves water and helps in the reduction of energy consumption.
  • High energy efficient.
  • Energy Star certified.
  • Unlimited hot water supply.
  • No waiting time.

  • Bit expensive.
  • Weighs more compared to other tankless heaters.


Rheem RTE 13 Electric Tankless Water Heater, 4 GPM

Another product from Rheem is this Rheem RTE 13 Electric Water Heater, 4 GPM. This unit is ideal for point-of-use applications. You can get continuous hot water on demand. It comes with a compact design and is energy efficient. There is no need to worry whether it fits in your place or not. Because it is designed in such a way to fit almost anywhere. On Rheem RTE 13 Heater, you can find the Temperature control, LEDs indicate the standby mode and active element. There is a standard half-inch water connection available in this unit.

One awesome thing about this product is, you can use it anywhere where the hot water is needed. Applicable in Homes, Condos, Apartments, Hotels, Hospitals, Restaurants, Boats, Laboratories, Offices, etc. This comes with the rugged copper or brass heat exchanger and also there is a feature of modulating the power. To say in a simple way, this heater is great for the single shower applications. There is no need to wait for a long time, as it provides continuous hot water on demand. Now, let us see some more technical details of this product.

Rheem RTEX-13 Tankless Electric Water Heater Image

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Product Dimensions: 7.2 x 7.2 x 7.2 inches, Weight: 7.35 pounds, Size: 4 GPM, Wattage: 13000 w, Voltage: 240 volts, Warranty: Heat exchange warranty for 1 year, 10 years warranty if the unit is installed by a licensed technician.

  • Flow rate of 4 GPM
  • Ideal for point-of-use applications. Means a one-shower-at-a-time household applications.
  • Compact design.
  • Energy efficient.
  • Cheap enough.
  • Fits almost anywhere.
  • Provides continuous hot water on demand.

  • May not suitable for larger households.
  • Relatively low output rate.
  • Warranty is 1 year only. But if the unit was installed by a licensed technician then the warranty will be 10 years.


Ecosmart Eco 11 Electric Tankless Water Heater

Ecosmart is the most talked brand for providing Tankless Water Heaters. One of the best products is this Ecosmart Eco 11 Electric Tankless Water Heater. To ensure the optimal water heating, it uses a self-modulating technology which allows which allows the heater to control its energy output. This product is best for any small point of use or a small apartment. It heats 2 gallons of water per minute. It is optimal for 67 degrees F of weather and above. Depending on the climate, you can use this Ecosmart Eco 11 for single or multiple applications.

Ecosmart Eco 11 heater can handle 2 sinks in a colder climate and in a warm climate it can handle one shower and 2 sinks simultaneously. On demand, it provides you with endless hot water when sized correctly. It won’t store the hot water just like the tank type water heater. Instead, it heats water when it passes through the unit. It saves you up to 50% in water heating costs because it turns on only when you need the hot water and additionally they cut down on heat loss. You can also save space as there is no tank available and save energy as this unit is the most advanced self-modulating technology.

EcoSmart ECO 11 Electric Tankless Water Heater Image

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Specifications: Dimensions are 6.5 x 13.5 x 10 inches and weight is 6.5 pounds. Warranty: Limited Lifetime warranty.

  • Easily replaceable elements.
  • More storage space.
  • Limited lifetime warranty.
  • Provides endless hot water.
  • Digital temperature control.
  • Compact design.
  • Uses advanced self-modulating technology.
  • Saves money (save up to 50% in water heater costs), space and energy.

  • Slight slow.
  • For a larger family, it may not be suitable.


AO Smith Vertex GPHE 50 Power Vent Natural Gas Heater

As per our review and research, the water heater that stood in the sixth place is AO Smith Vertex GPHE 50. It comes with 90% thermal efficiency Power vent. This saves more money satisfies all your household requirements by providing a constant flow of 3 gallons of water per minute. This heater is safe and is energy star certified heater. One more interesting feature is, it is a natural gas water heater. So, for the one who is in search of natural products, this will be the best choice. This is particularly designed for an average of 4 people.

Another thing is it delivers a constant and continuous flow of hot water to your home with its 76000 BTU. This product has an amazing warranty for 6 years. This is the 50-gallon water heater which was designed to take the minimal floor space. So, compared to other competitors, this is taller which stands about 68 inches. The diameter is 27 inches only. So, you can happily place it in a corner and save much floor space. It also comes with side taps which make the installation simple. Also, there are Sidewall and vertical vent options in this AO Smith Water Heater.


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These are the features of this product and coming to the specifications, Dimensions: 22 x 22 x 70.6 inches, Weight: 140 pounds, Vent Size: 2

  • High-efficiency power vent (90% thermal efficiency)
  • Appealing appearance.
  • Suitable for the household of 4 people.
  • Appealing appearance.
  • Takes less floor space as it is designed taller.
  • Easy to install and use.
  • Natural Gas Water heater.

  • There will not be enough hot water for more members.


Rheem Prestige G50-40N RH67 PD Heater

Here comes the another best Water heater from the Rheem company that is nothing but the Rheem Prestige G50-40N RH67 PD Water Heater. It comes with the Two pipe system in which one pulls in the outside air for combustion and the other pipe exhausts the combustion gases. The first thing that you will fall for this product is its protective control system. Also, if you want to raise the glamour quotient of your bathroom or kitchen you can go for this Rheem Prestige G50-40N RH67 PD. It is an energy star rated appliance which use natural gas to provide plenty of hot water for your household at 40K BTU.

This Rheem 50 gallon hot water heater is best suitable for a family of 4. With its eco-friendly burner, this heater produces low emissions. Also, it boasts a low NOx design. While heating water it produces some nitrous oxide but still it operates great and efficiently. You can sync this unit with any systems that offer home automation and energy conservation and security as well. This is all possible because it is Econet enabled. You can manage this heater through Computer or Tablets or Smartphones.

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Let’s have a look at Physical Specifications. Dimensions are 20 x 20 x 68 inches and weight is 0.16 ounces. Size: Tall, Voltage: 240 volts. Power source: Natural Gas.

  • Protects the tank with its anode rod.
  • Energy star rated.
  • Saves your money.
  • Suitable for the household of upto 4 people.
  • With electronic gas control, you can perform better service and monitoring.
  • Better uniform energy factor.
  • Econet Wifi kit available.

  • Won’t provide hot water instantly. Takes some time to generate hot water.


Rheem Performance Platinum 50 Gal Hot Water Heater

Another popular brand is Rheem. It has very demand in the market for Water Heaters. Coming to the product, Rheem Performance Platinum 50 Gal Water Heater is the most reviewed, popular among in these days. Because of its features, most of the people are showing interest to buy this product. Let’s see what are they. If you are from the household of 3 to 5 people, then you can happily choose this as it provides an ample supply of hot water for big families. There are an automatic thermostat and 2 5500-watt stainless steel heating elements which helps in keeping the water at the desired temperature.

The tank is protected from the rust as this unit incorporated with a patented magnesium anode rod design with a special resistor. This ensures a longer tank life. You will not face any difficulties as this heater is easy to maintain. In the first hour, it delivers 63 gallons of hot water. Another thing to note is, the 240-volt connection is required for installation. If you looking to replace your existing water heater, then you can go for this Rheem Performance Platinum 50 Gal as it is designed for easy replacement. As it has the tall tank, it fits in different types of indoor spaces.

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Physical Specifications: Dimensions are 20.25 Depth, 58.875 Height, 20.25 in inches. Weight is 121 lb.Wattage: 5500 w. Warranty: 12 years warranty on tank and parts of the product. 3 years in home labor warranty is also available.

  • Easy to Maintain.
  • 12 years Warranty.
  • You can easily replace your existing heater, with this product.
  • Fits in a variety of indoor spaces.
  • Provides 63 gallons of hot water in the first hour.

  • Takes somewhat more space for installation.


Bosch Tronic 3000 T 4-Gallon Electric Mini-Tank Water Heater

Bosch Tronic is also the best brand which gives the products of good quality and amazing features. Now let’s see about its best product that is, Bosch Tronic 3000 T 4-Gallon Electric Mini-Tank Water Heater. It comes with 4 Gallon capacity and is ideal for point-of-use applications. This Mini-Tank Water Heater fits perfectly under your sink and whenever you need hot water it provides. Its thermal efficiency is 98% and comes with a premium glass-lined material. It gives a long service life for the unit and also easy to maintain.

There is no need to wait for hours to get the hot water at your sink. Because it gives hot water on demand at your every need. It can easily supply up to 2 sinks simultaneously. It can easily be mounted means it can be wall or shelf or floor mounted. You just need to tap into the cold water line and directly install the Bosch Tronic 3000 T at your sink for hot water. As I said that Bosch Tronic is good in providing the quality products, this unit also ensures the Long-life quality. For maximum energy efficiency, there is thick CFC-free foam insulation.


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Technical Details: Dimensions are 13.8 x 13.5 x 13.8 inches, Weight is 22.9 pounds. Voltage: 120 volts, Wattage: 1440 watts, Size: 4 Gallon. Warranty: 6 years on product and 2 years on parts.

  • Provides hot water instantly.
  • Provides hot water at the point of use.
  • Comes with pressure or temperature relief valve.
  • Maximum energy efficiency.
  • Ensures durability.
  • Supplies up to 2 sinks at a time.

  • Chances of mineral accumulation.
  • As per some reviews. there is a problem of Pressure relief valve leakage.


AO Smith XCG-50 ProMax Tall Gas Water Heater, 50 Gal

As I said below, AO Smith is the topmost brand in providing the Water Heater that satisfies most of your requirements. One more AO Smith product that is placed in this top 10 list is AO Smith XCG-50 ProMax Tall Gas Water Heater. This comes with a Blue diamond glass coating which provides superior corrosion resistance. To generate the power that is required to operate the electronic gas control it uses a self-powered electronic gas valve. This uses a thermopile which eliminates the use of external power.

There is an internal microprocessor which provides a faster heating response, tighter differentials for precise sensing, and enhanced operating parameters. Another feature is the Dynaclean diffuser dip tube. This helps to reduce the sediment and lime buildup and also maximizes the hot water output. It lowers your energy bill as it is designed to deliver an economical performance. Also gives the long lasting value. It delivers a first-hour rating of 88 gallons of water with 50-gallon tank and 40K BTU. It has a recovery rate of 41-gallons per hour.

AO Smith XCG-50 ProMax Water Heater

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Physical Specifications: Dimensions are 21 x 21 x 60.8 inches. Weight is 168 pounds. Warranty: 10 Years limited warranty on tank and 6 years warranty on parts. Size: 50 gal.

  • Comes with good design.
  • Faster heating response.
  • Blue diamond glass coating.
  • Good quality.
  • The self-powered electronic gas valve is available.

  • The process of generating hot water is a little bit slow.

Water Heater Buying Guide – Things to consider while buying

Here the most important information that you need to refer before buying a Water Heater that is Buying Guide. You need to check out the things or factors that are to be considered while buying a Water Heater. This helps you to choose the right one easily. Check each factor and keep in mind the requirements of yours. Then go the list mentioned above and buy the best water heater.

Main features to consider

Type of Water Heater

There are different types of water heaters like Storage Tank, Tankless, RV, Solar, Electric, Gas Water Heaters. If you want to go for the lower cost then you can choose the Storage Tank type. It keeps anywhere from 20 gallons to 80 gallons of hot water ready to use. If you want the hot water on demand, then you can consider the tankless water heater. It provides hot water whenever you need it.

If you want natural products, then you can go for the Natural Gas water heaters. For that, you need a natural gas service to your home. If you are not having, you need to consider extra installation cost for running a gas line. Solar Water heaters are the other type of heaters which use solar energy and saves your money as well. As sunlight can be unpredictable, you can choose this type of heater if needed.


Next, you need to consider is Size. If you have choosen the Storage Tank type then look at the number of gallons it can supply each hour. This depends on the size of the tank, size of the heating element, and source of heat. Based on your family size, you need to estimate how much water you and your family use daily. Then take that estimated value as the minimum number of gallons and choose the correct one.

Electrical Needs

Generally, water heaters need electricity to run. Standard 115 volt service for the ignition system required in the case of the Gas heater. And some heaters just plug into a convenient outlet. 240-volt service is required for Electric heaters including the tankless heaters. Also, they need a dedicated line which is rated sufficiently to handle the current draw. So, these are the electrical needs you need to consider.


Not all heaters come in equal size. They vary in diameter and height and you need to make sure whether you have enough space for the product you choose. Generally, for storage tank type heaters the size varies based on the capacity. Also, some heaters require a certain amount of air surrounding them. So, based on that you need to plan for appropriate space. Some may come taller and some come wider. Before buying check the specifications and then buy.


This need to be considered if you are going for the Gas Water Heaters because they have to be vented to the outside. This is handled in many ways. It is better to take help of the licensed plumber to get venting done adequately and safely. Even when you are replacing the present heater with Gas heater, you need to take licensed plumber help because, since your last installation, the local building codes might have changed.

Digital Display

These Digital Displays help you to monitor the water levels and you can easily know the status. When the water is heated, it automatically indicates you. In Solar heaters, the displays help you to know the tank and collector temperatures, pressure readings, and others. In some electric heaters, you can set a vacation mode. When you are away it uses the heat pump for more efficiency.


It is better to check the warranty before buying any device. For water heaters, the warranty runs from 2 to 12 years. For longer warranty models you need to pay a bit more because based on the quality and features, the price increases. They use larger burners or elements to speed up the heating and also have thicker insulation which leads to less heat loss. So, if possible choose the Water Heater with the longest warranty.


Choosing the best water heater is the initial thing you need to do to enjoy the warm water. It is not easy and won’t be a comfort to face the cold water all the time. With the right unit for residential or commercial purpose, you can have a comfortable and easy time enjoying the hot water. To choose the right one, all you need to do is check the buying guide above, sort out your requirements, refer the top 10 list and then choose the required one within your budget. The products listed here will add value to money. So, happily spend your money on the unit you like and enjoy the hot water.