Best Rheem Tankless Water Heater Reviews 2020

If you are already looking for the Best Rheem Tankless Water Heater, you probably know that these units save a significant amount of money on utility bills. Rheem water heaters are designed for homeowners who prefer compact and space saving units that provide a continuous supply of hot water.

About Rheem:

In the mid-1920s Rheem manufacturing company (official web site) was founded. It is an industry leader established by the two brothers Richard and Donald Rheem. It is an American privately held manufacturer that manufactures, cooling, heating, water heating, Spa/pool heating, and commercial refrigeration products. The company was started with a galvanized plant in San, Francisco, California, and then it started manufacturing water heaters.

List Of Top 6 Rheem Tankless Water Heaters 2020:

IMAGE PRODUCT Dimensions Weight
Electric Tankless Water heater
Rheem RTEX-13 Tankless Water Heater review 2019
Rheem RTEX-13 4 x 9 x 13 inches 4 pounds CHECK ON AMAZON
Electric Tankless Water heater
Rheem RTEX-18 Electric Tankless Water Heater Reviews 2019
Rheem RTEX-18 4 x 15 x 19 inches 8.5 pounds CHECK ON AMAZON
Gas Tankless Water heater
best Rheem RTG-95XLN Outdoor Tankless Natural Gas Water Heater reviews 2019
Rheem RTG-95XLN 14 x 10 x 26 inches 54 pounds CHECK ON AMAZON
Gas Tankless Water heater
Rheem RTG-64XLN Outdoor Natural Gas Tankless Water Heater reviews
Rheem RTG-64XLN 14 x 10 x 26 inches 38 pounds CHECK ON AMAZON
Gas Tankless Water heater
top Rheem RTG-84XLN Natural Gas Outdoor Tankless Water Heater reviews 2019
Rheem RTG-84XLN 14 x 10 x 26 inches 54 pounds CHECK ON AMAZON
Propane Tankless Water Heater
top Rheem RTG-95XLP Outdoor Tankless Propane Water Heater reviews
Rheem RTG-95XLP 18.5 x 9.8 x 27.5 inches 82 pounds CHECK ON AMAZON

Best Rheem Tankless Water Heater Reviews 2020:

Rheem is known as the biggest manufacturer in Top Tankless Water Heater Brands for the consumers in North America and internationally. Rheem has an international presence in almost fourteen countries and has its headquarters in Atlanta. The company produces the best quality and most energy efficient gas, electric, solar, and commercial water heaters. The company’s premium brands are Ruud, Rheem, Raypak, Splendid, Eemax, Russell, Richmond, Kramer, and Coldzone. All the Rheem products meet the rigorous industry standards for quality, efficiency, and reliability. To ensure the highest quality and operating excellence, each phase in the manufacturing process is rigorously monitored.

Here I have presented the detailed best rheem tankless water heater reviews so that the consumers can decide which one is better for them.

Rheem Electric Tankless Water Heaters Reviews:

Electric Tankless Water heaters are the most affordable option for those who are looking to retrofit their system. They give you the continuous supply of hot water on demand without the limitations of a tank. They are small and can be easily installed and handled.Let’s quickly check out the following Rheem electric water heater review:

1. Rheem RTEX-13 Tankless Water Heater:

Unlike the other Tankless water heaters, Rheem RTEX-13 supplies a great amount of hot water on demand. It is a professional classic Tankless water heater that Saves 99.8 percent Energy.

Rheem RTEX-13



Simple installation: Rheem RTEX-13 is a Tankless water heater that is easy to install. If you are experienced and have all the needed equipment, then you can install it on your own.  And if you get professional help to install it then trust me it only takes two or three hours.

Thermostatic control: The unit has a thermostatic control with adjustable and stylish LED display.

Saves Energy: The most interesting aspect of installing Rheem RTEX-13 is that it conserves electric power. It is 99.8 percent energy efficient and provides an endless supply of hot water.

Heating elements: The unit has durable copper immersion two heating elements. It heats the water, and you don’t have to wait long in the cold bathroom for hot water to come in the tap.

  • Eco-friendly
  • Easy to install and replace
  • Durable heating elements
  • Attractive compact design
  • Stable water temperature
  • Easy to operate temperature control panel
  • Reduces utility bills
  • The flow rate may drop in colder climates
  • Not great for household more than four members
  • Need to have a 60 amp breaker box


2. Rheem RTEX-18 Electric Tankless Water Heater:

Rheem RTEX-18 is a residential Tankless water heater that provides hot water quickly for a single point of use such as shower, bathroom, sink or any other use.

Rheem RTEX -18

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Simple installation: Rheem RTEX-18 is a Tankless water heater that provides you with the endless supply of hot water without wasting any time. Guess what the best part is? It is quite simple to install. Also, it is easy to replace and simple to use. You do not need to be an expert to install or use Rheem RTEX-18.

Digital Thermostatic control: The unit has an external digital thermostatic control along with an LED display.

Energy efficient & Save money: The homeowners want to buy a unit that not only provides a continuous supply of hot water but also saves money. Rheem RTEX-18 is 99% save Energy . It means you can save on utility bills.

Advanced self-modulation system: Rheem RTEX-18 comes with the advanced self-modulation to adjust the power to meet the hot water demand.

  • LED display that shows the accurate water temperature
  • Durable copper heating elements
  • Thermostat to allow you to adjust the water temperature efficiently
  • Two heating chambers that allow the unit to heat more gallons of water per minute
  • Simple installation
  • Lightning fast heating
  • Cuts down on electricity bills
  • An efficient support department
  • Due to its size, the unit takes up more space
  • Flickering of the LED dimmable light bulbs
  • The installation drawings are printed wrong way up


Rheem Gas Water Heaters Reviews 2020:

Perhaps the greatest invention in Tankless water heater technology is the Gas Tankless Water Heaters. They provide the consumer with many benefits that include space saving and reducing the gas bills. Rheem gas water heaters are one of the most widely accepted water heaters. If you want to buy a Tankless gas water heater, then choose the size according to the number of people have presented a few Rheem gas Tankless water heaters reviews so that you could choose the right unit as per your requirements:

1. Rheem RTG-95XLN Outdoor Tankless Natural Gas Water Heater:

It is an ultra-low NOx mid efficiency Tankless water heater that is extremely environment-friendly.

Rheem RTG-95XLN Outdoor Whole HOuse Tankless Water Heater Low NOx 9.5 GPM 2020


Performance: No matter you are busy doing dishes or have to take a quick bath; you will be getting the continuous supply of hot water with Rheem RTG-95XLN. The best thing about Rheem RTG-95XLN is that you do not need to wait long to get the endless supply of hot water. The unit produces 8 gallons of hot water per minute that is more than enough for a small family.

Internal heaters: The unit features the internal heaters that are configured in a way that does not let the cold water mix in.

Efficiency: Rheem RTG-95XLN is an efficient unit that provides hot water at first touch. You need to take a shower or wash clothes? No problem! The hot water will be ready.

Intelligent electronic control: The unit comes with a digital display monitor that helps you to set the temperature of your choice. Also, you can adjust the flow rate to prevent fluctuations in the water temperature.

Installation: Rheem RTG-95XLN features a self-diagnostic system to make installation and maintenance of the unit easy for you.

Graphical instruction: The graphical illustrations are provided on the instructional manual to make it easy for consumers to use the unit. If you have any doubts about taking up the set up on your own, then hire a professional.

  • One of the best brands in water heaters
  • Digital display of heat control, with maintenance code
  • Digital remote control
  • High-altitude capability
  • Compatible with Low flow fixture
  • Standard ten-year warranty
  • Does not require any ventilation
  • Energy efficiency rate at 94%
  • High flow rate at 9.5 GPM
  • Seems expensive up-front
  • Weighs 5-10 times more than the other Tankless heaters
  • Susceptible to the wild exterior since it is an outdoor unit


2. Rheem RTG-64XLN Outdoor Natural Gas Tankless Water Heater:

Rheem is one of the trusted names in the world of water heaters. Rheem RTG-64XLN has quickly become the best-selling gas Tankless water heater.

Rheem RTG-64XLN Outdoor Natural Gas Tankless Water Heater reviews


Power source: To comply with the production capacity of Rheem RTG-64XLN, you need 120v AC plug.

Space saving: Traditional water heaters take more space but Rheem RTG-64XLN is compact and small in size. So, there is no need to bother about where to hang it.

Safety: The unit has a built-in self-diagnostic program. Whenever there is something wrong, the maintenance codes are displayed. The unit comes with a manual that contains the explanation of these codes so you can fix it on your own.

Flow rate: The unit has a flow rate of 6.4 gallons per minute.

Continuous supply of hot water: You need a constant supply of hot water when you do the dishes or take a shower. Rheem RTG-64XLN supports three faucets at a time.

Shape: Rheem RTG-64XLN is rectangular in shape. It is for outdoor installation and weighs 38 pounds.

  • Affordable and Reduces Bills
  • Low emission of NOx
  • Easy to install
  • Easy to use within 120 volts
  • Excellent flow rate produces more hot water
  • Shape and color make it easy to use
  • Designed with modern technological frames
  • Full warranty and support
  • High customer ratings and reviews
  • Continuous supply of hot water
  • Needs a lot of venting power
  • Does not provide hot water instantly
  • Sometimes hard to install outside of the house
  • The maintenance can be hard


3. Rheem RTG-84XLN Natural Gas Outdoor Tankless Water Heater:

It is an ultra-low NOx mid-efficiency outdoor Tankless water heater and is 82% energy efficient. Following are the features I found in Rheem RTG-84XLN after using it:

top Rheem RTG-84XLN Natural Gas Outdoor Tankless Water Heater reviews 2020


Self-diagnostic system: Rheem RTG-84XLN has a self-diagnostic system for easy installation and service.

82% Energy efficient: so that you can save money on your utility bills.

Digital display: The unit comes with a digital display that shows the maintenance codes and temperature settings.

Environment-friendly: What can be better than buying a Tankless water heater that saves your bucks on energy bills and is environment-friendly as well? Rheem RTG-84XLN has an environment-friendly Ultra Low NOx burner. It means there will be low emissions.

Compact: The unit is compact in size but supplies hot water continuously without any break.

  • An outdoor appliance
  • An energy efficient heater with .82 energy factor
  • Low NOx burner helps obtain efficiency
  • The process of installation is not difficult
  • The unit comes with a manual
  • No need for venting
  • The unit delivers 180,000 BTU
  • An extensive 12-year warranty
  • The flow rate of 4 gallons per minute
  • The fuel source is Natural Gas
  • Mid-size capacity
  • A little expensive
  • The Low NOx burner needs a lot of care and maintenance


Rheem Propane Tankless Water Heater Reviews:

Rheem has been producing award-winning heating solutions since its establishment. After searching a lot on the web, I have concluded that if you are looking for a Propane Tankless water heaters, then Rheem must be on your list.

1. Rheem RTG-95XLP Outdoor Tankless Propane Water Heater:

Rheem RTG-95XLP features next generation burner technology. It is a Tankless water heater that is powered by propane.

Rheem RTG-95XLP 2020 tankless water heater


High flow rate: Rheem RTG-95XLP has a flow rate of 9.5 gallons per minute. It is the best water heater for a 3bathrooms home. It is interesting for me to know that it is the highest flow rate among other products made by Rheem.

Energy-efficient: With stainless steel condensing heat exchanger the unit is 82% energy efficient. Also, it has intelligent electronic controls that increase efficiency and safety as well.

Low emissions: Despite the fact that there is no ventilation required, the unit emits nitrogen oxide that is harmful to the environment.

  • The unit does not require a lot of space
  • Only heats water on demand
  • Less expensive
  • Hot Start Programming
  • Has a stainless steel appearance makes it aesthetically pleasing
  • Runs on propane gas
  • A twelve-year limited warranty
  • Control this unit through the EcoNet mobile app
  • Can heat up to nine and a half gallons of water per minute
  • Outdoor with Remote Control
  • Self-diagnostic system
  • Requires a knowledgeable person to install it
  • More costly than conventional home water heater units


Rheem Tankless Water Heater Prices:

What is the price of a Rheem water heater? Rheem gas water heater costs $240 to $400 a year, depending on the demand for water. The cost of a Rheem electric Tankless water heater is $550 to $800 a year depending on the usage and electricity costs. The cost of a Rheem Tankless water heater depends on how much water you use.

Installing a Tankless water heater is a good option as you can save a lot on utility bills. My personal experience says that a Tankless water heater is better than a traditional one due to many reasons. You need more space to hang it. Also, they consume a lot of energy to keep the water warm in the tank. As a result, you need to spend more money on energy bills. But Rheem Tankless water heater supplies hot water on demand. They are compact, so need less space.

As far as the installation cost is concerned, you may need to call a professional to install and fix it. However, they save you money in the long run. Some models do not require you to call a professional plumber. You can install these types of Tankless water heaters on your own and save money.

Whenever you choose a Tankless water heater, make sure that you know what your requirements are and what your budget is?

My pick is:

Rheem’s all types of Tankless water heaters (Gas, Propane, and Electric) are good, but my pick is Rheem RTG-84XLN Natural Gas Outdoor Tankless, Water Heater. It is powered by natural gas. I suggest you buy Rheem RTG-84XLN as it is made with high-quality materials. The unit is constructed with the manufacturing standards that Rheem is known for.

The unit is made with the next generation burning technology and has the flow rate of 8.4 GPM for 350F. The minimum flow rate is 0.26 gallons per minute. Ultralow NOx burner technology in the unit removes all the harmful gases before they emit. With the weight of 54 pounds, you can install it by yourself after reading instructions from the manual (that comes along). You can use it simultaneously in 2-3 bathrooms.

Thus Rheem RTG-84XLN is the best gas Tankless water heater for outdoor purposes. It is certified for outstanding performance. It serves you hot water on demand.

No matter you are installing it in your home or office, Tankless water heater is a great investment. The lifespan of Tankless water is more than a traditional water heater but only if it is working well. Whenever you plan to replace your conventional water heater with the Tankless heater, make sure that you pick a model that is energy efficient.

You need to be sure that the product you are buying will save your money in the long run. It is annoying to wait for hot water to come into the taps during the shower. To avoid such scenes, you need a reliable, efficient, eco-friendly, and affordable water heater. Rheem is indeed a great option to consider while looking for a reliable water heater.

Rheem is known for manufacturing the water heaters that supply hot water continuously. Their products are highly efficient and have space-saving designs.

So, no matter how small or big your home is, you can get an endless supply of hot water by installing a Rheem Tankless water heater. Choose electric, gas or propane water heater according to the budget you have and wash clothes, take a shower or do laundry with warm water even in the cold winter morning.

Click the link given below to check the details, features, and prices of the products on Amazon.