6 Best Rheem Water Heaters in 2020 – Reviews and Buyer’s Guide

Are you looking to buy a quality water heater for your home or apartment? If you’ve been on the hunt, I’m sure you may have come across Rheem water heaters more than once — and for all the good reasons.

Rheem is a leading water heater company based in the United States. Since decades, their water heaters have been one of the highest selling products not only in the United States but all over the world.

What makes their water heaters so much in demand?

In this article, we’ll put six of the best Rheem water heaters under the microscope to find out the good and potentially bad features of each model.
So, let’s dive into it!

Our Top Pick

Rheem RTG-84XLN-1 Tankless Water Heater

Since Rheem is one of the leading companies that manufacture water heaters, there are tons of high-quality products you can choose for your home. Among all the products listed in this article, we rank RTG-84XLN-1 as the top Rheem water heater available in the market.

The RTG-84XLN-1 is a premium water heating unit that is capable of delivering 8.4 gallons of hot water every minute. With such a high flow rate, it can deliver hot water in multiple sinks and showers simultaneously. This model is perfect for outdoor uses as it has a freeze protection rate up to -30 degrees.

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Quick Summary of Best Rheem Water Heaters

Product Image Product Name
Top Pick for Overall Performance
Rheem RTG-84XLN-1 Tankless Water Heater

Rheem RTG-84XLN-1 is the most premium water heating system by Rheem. This model is highly efficient and can deliver up to 8.4 gallons of hot water every minute. Also, this unit is relatively inexpensive and features exclusive water-saving technology.

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Water Heater with High Flow Rate
Rheem RTGH-95DVLN Tankless Natural Gas Water Heater

Rheem RTGH-95DVL is a natural gas water heater designed to deliver an endless supply of hot water at your home. With a capacity of 9.5 GPM, this is one of the most efficient water heaters by Rheem. Additionally, this system is backed by a 12-year warranty on the heating elements.

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Excellent Choice for On-Demand Water Heating
Rheem RTEX-24 Residential Tankless Water Heater

Rheem RTEX-24 is made of durable copper immersion heating elements along with brass top. It features self-modulating technology that automatically adjusts the water temperature as per your need. Also, it includes an Overheat Film Wrap (OFW) that protects the heat exchanger for longevity.

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Lightweight and Compact Tankless Water Heater
Rheem RTEX-13 Residential Tankless Water Heater

High quality and energy-efficient, Rheem RTEX-13 is a residential water heating system that delivers hot water exactly when you need it. This model is equipped with an adjustable thermostat control that makes it effortless to control the water temperature.

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Top Pick for Energy Efficiency
Rheem RTEX-18 Residential Tankless Water Heater

Rheem RTEX-18 is a highly functional inline water heater that delivers endless hot water enough for a medium household. This model is also compact, lightweight, and portable. Therefore it is an excellent water heating system for mobile homes, RVs, travel trailers, and campers.

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Budget-Friendly Tankless Water Heater
Rheem RTEX-08 Residential Tankless Water Heater

Rheem RTEX-08 is an effective water heater that comes at a reasonable price. It is an excellent point-of-use application that is 99.8% energy-efficient and delivers instant hot water when required.

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Best Rheem Water Heaters of 2020 - Reviewed

Rheem RTG-84XLN-1 Tankless Water Heater

Top Pick for Overall Performance

Features Highlights

  • Exclusive Water Saving Technology
  • Can save up to 1,100 gallons per year
  • Features Hot Start Programming that reduces cold water burst
  • Comes with a recirculation pump ready kit
  • Ideal for outdoors purpose with freeze protection rate of -30 degrees
Rheem RTG-84XLN-1 is a perfect outdoor tankless water heater that is equipped with exclusive water saving technology and comes with an affordable price tag. Check Price on Amazon

Product Specification

  • Dimensions:

    8.9 x 13.9 x 23.6 inches

  • Weight:

    54 pounds

  • Material:

    Stainless Steel

  • Flow Rate:

    8.4 gallons per minute (GPM)

  • Voltage:

    120 volts

  • Warranty:

    12 Years Warranty

Pros

  • Low NOx helps to reduce harmful emissions
  • Can serve multiple showers and sinks simultaneously
  • Can save up to 1,100 gallons of water every year
  • Comes with a 12-years warranty

Cons

  • Must be installed outdoors

Our Verdict

If you’re looking for a high-quality Rheem outdoor water heater at an affordable price, Rheem RTG-84XLN-1 is your best bet. This system is made up of sturdy stainless steel material and can deliver up to 8.4 gallons of water every minute. Additionally, this unit is backed by a 12-years warranty.

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Rheem RTGH-95DVLN Tankless Natural Gas Water Heater

Water Heater with High Flow Rate

Features Highlights

  • High-quality water heater with EcoNet Smart Home Technology
  • 94% energy efficient
  • Its condensing heat exchanger is made up of stainless-steel material
  • Features intelligent electronic controls for safety and efficiency
  • Low NOx solutions
  • Built-in Condensate Neutralizer
  • Energy Star rated
Rheem RTGH-95DVL is a high performing gas water heater that is designed to deliver continuous hot water at your home. Check Price on Amazon

Product Specification

  • Dimensions:

    18.5 x 9.8 x 27.5 inches

  • Weight:

    79 pounds

  • Material:

    Stainless Steel

  • Flow Rate:

    9.5 gallons per minute (GPM)

  • Voltage:

    120 volts

  • Warranty:

    12 Years Warranty

Pros

  • High flow rate
  • 94% energy efficiency rating
  • Safety features and easy-to-use controls
  • Can be installed both indoor and outdoor
  • Constructed to deal with freezing temperatures

Cons

  • It is slightly expensive
  • This unit can be overabundant for smaller household

Our Verdict

If you’re opting for a premium water heater with a massive flow rate, you should definitely consider buying Rheem RTGH-95DVL. This appliance offers an excellent flow rate of 9.5 gallons per minute. Additionally, this unit consumes less energy and is equipped with self-diagnostic technology.

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Rheem RTEX-24 Residential Tankless Water Heater

Excellent Choice for On-Demand Water Heating

Features Highlights

  • Digital thermostatic control with LED display
  • Advanced self-modulation technology
  • Built with copper immersion three heating elements
  • Easy installation
Rheem RTEX-24 is tankless electric water heater that can deliver hot water on-demand for both multiple applications or single point-of-use. Check Price on Amazon

Product Specification

  • Dimensions:

    4 x 18 x 19 inches

  • Weight:

    17.8 pounds

  • Material:

    Copper Immersion

  • Flow Rate:

    5.9 gallons per minute (GPM)

  • Voltage:

    240 volts

  • Warranty:

    5 Year Limited Warranty

Pros

  • Unlimited supply of hot water
  • Easy to install and operate
  • Inexpensive and affordable
  • Advanced self-modulation technology
  • Durable copper immersion heating element
  • Digital thermostatic control with LED display

Cons

  • Additional installation cost
  • Can consume a lot of energy during winter

Our Verdict

If you’re one of those looking for a compact unit that fits in a small space, you should consider buying Rheem RTEX-24. It is equipped with digital thermostatic control with an LED display and features a self-modulating mechanism. Although inexpensive, this unit is made out of high-quality materials that last for years to come.

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Rheem RTEX-13 Residential Tankless Water Heater

Lightweight and Compact Tankless Water Heater

Features Highlights

  • Adjustable thermostatic control with LED display
  • Sturdy copper immersion two heating elements
  • Equipped with self-modulating power control
  • Easy installation
  • 99.8% energy-efficient
If you're looking for a residential water heater that can save you on utility bills, Rheem RTEX-13 should certainly make it to your wishlist as this unit is 99.8% energy-efficient. Check Price on Amazon

Product Specification

  • Dimensions:

    4 x 9 x 13 inches

  • Weight:

    4 pounds

  • Material:

    Copper Immersion

  • Flow Rate:

    3.17 gallons per minute (GPM)

  • Voltage:

    240 volts

  • Warranty:

    5 Year Limited Warranty

Pros

  • High-quality on-demand water heater
  • Durable copper immersion heating elements
  • Compact and Lightweight
  • Easy to install
  • 99.8% energy-efficient
  • Powered by self-modulating power control

Cons

  • Not ideal for cold climates
  • Requires a 60-AMP breaker box

Our Verdict

Rheem RTEX-13 is a high performing on-demand water heating system that is equipped with self-modulating power control. This model is 99.8% energy-efficient and includes durable copper immersion heating elements. If you are concerned about water tanks consuming a lot of space at your home, this tankless system is an excellent product for you.

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Rheem RTEX-18 Residential Tankless Water Heater

Top Pick for Energy Efficiency

Features Highlights

  • Robust and durable copper immersion heating elements along with brass top
  • Endless supply of hot water
  • 99.8% energy efficient
  • Effortless installation
  • Digital temperature display
  • External controls to adjust temperature
Rheem RTEX-18 is an efficient tankless electric water heater that offers endless hot water on demand for an entire house that has two to three bathrooms. Check Price on Amazon

Product Specification

  • Dimensions:

    4 x 15 x 19 inches

  • Weight:

    8.5 pounds

  • Material:

    Copper Immersion

  • Flow Rate:

    4.4 gallons per minute (GPM)

  • Voltage:

    240 volts

  • Warranty:

    5 Year Limited Warranty

Pros

  • Self-modulating unit
  • Small and compact
  • Adjusts the water temperature as per your desire
  • Has copper immersion heating elements with brass top
  • For a comfortable replacement, both the heating elements are threaded
  • 99.8% energy efficient
  • Includes digital display for easy reading

Cons

  • Few complaints regarding fluctuation in the temperature
  • Takes more than a second to heat the water
  • Installation manual is printed wrong way

Our Verdict

You will definitely love this product by Rheem as it is capable of delivering an unlimited supply of hot water at your home. In addition to that, this system is 99.8% energy efficient, which means this unit significantly cuts down the power usage and thus, saves a lot of money.

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Rheem RTEX-08 Residential Tankless Water Heater

Budget-Friendly Tankless Water Heater

Features Highlights

  • Consistent and endless hot water supply
  • Compact and stylish design with digital temperature control
  • 99.8% energy-efficient
  • Robust copper immersion heating elements with brass top
  • Easy replacement and simple installation
  • Digital temperature display
If you’re looking for a high-quality water heater at a reasonable price, look no further than Rheem RTEX-08. Check Price on Amazon

Product Specification

  • Dimensions:

    4 x 9 x 13 inches

  • Weight:

    7 pounds

  • Material:

    Copper Immersion

  • Flow Rate:

    1.95 gallons per minute (GPM)

  • Voltage:

    240 volts

  • Warranty:

    5 Years Limited Warranty

Pros

  • Compact-sized and lightweight
  • Space-saving design
  • 99.8% energy efficient
  • Self-modulating heat exchanger
  • Robust copper immersion heating elements with brass top
  • Features a digital temperature control

Cons

  • Not suitable for large families
  • Although simple, the installation process requires additional wiring and pole breakers, which increases installation cost

Our Verdict

Rheem RTEX-08 is a cost-effective water heater that includes a modulating heat exchanger for efficient performance. Similar to other Rheem products, this model is also 99% energy effective and is effortless to use. In addition, this model is backed by a five years warranty for heating elements.

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Comparison Table for Rheem Water Heaters

SNProduct NameDimensions (inches)Weight (pounds)MaterialFlow Rate (GPM)Voltage (Volts)Warranty
1Rheem RTG-84XLN-1 Tankless Water Heater8.9 x 13.9 x 23.654Stainless Steel8.412012 Years Warranty
2Rheem RTGH-95DVLN Tankless Natural Gas Water Heater18.5 x 9.8 x 27.579Stainless Steel9.512012 Years Warranty
3Rheem RTEX-24 Residential Tankless Water Heater4 x 18 x 1917.8Copper Immersion5.92405 Year Limited Warranty
4Rheem RTEX-13 Residential Tankless Water Heater4 x 9 x 134Copper Immersion3.172405 Year Limited Warranty
5Rheem RTEX-18 Residential Tankless Water Heater4 x 15 x 19 8.5Copper Immersion4.42405 Year Limited Warranty
6Rheem RTEX-08 Residential Tankless Water Heater4 x 9 x 137Copper Immersion1.952405 Years Limited Warranty

Why Choose A Rheem Water Heater?

With so many different brands selling the same product in the market, it is obvious that you think about this! Well, worry not! We are here to tell you exactly why you should choose Rheem over any other brands available in the market.

Rheem has been the industry-leading company for almost a century. With high-quality and super-efficient products, they have been one of the most recognized brands when it comes to water heaters.

One of the most significant things that separate Rheem water heaters from any other brands is its Zero Waste Initiative. Not only does this company manufacture high-quality products, but they also practice environmentally-friendly approach and design energy-efficient models.

Although they have faced plenty of challenges and competition from newer companies, Rheem’s evolving technologies and innovative advancements have always set them apart from others.

Whether you live in a small apartment or a large family home, with Rheem, you should be able to find the most suitable water heater for your home.

FAQs on Rheem Water Heaters

Choosing the right water heater depends on various factors. It is always better to determine the size of your family and the demand for hot water at your home in one continuous hour. Once you know the “Peak Hour Demand” of your home, go for the model that meets the demand.

Some Rheem models offer a lifetime warranty on their products. This is to ensure the quality and reliability of its products. However, the products listed in this article are backed by a 5 to 12 years limited warranty.

Yes, Rheem also has water heaters for commercial applications. Their products also include a full line of standing pilot, sealed combustion, direct vent, intermittent spark, and high-efficiency commercial water heaters. In addition, they have both electric models as well as gas models in commercial water heaters.

Yes, indeed. While installing the new water heater, you can add an extra kit and get an additional four-year tank leak warranty. This additional kit will fit in both residential gas as well as electric water heaters manufactured by Rheem.

Tankless water heaters by Rheem are the most reliable units for both lower elevations as well as high elevations. Without the storage tanks, the units are space-saving, cost-effective, and highly durable compared to tank-type water heaters.

Well, it depends on how you use it and how well you maintain it. All the water heaters manufactured by Rheem are constructed with robust and highly durable components. Additionally, Rheem products come with a minimum warranty period of five years and can extend to a lifetime warranty.

Sometimes, few reasons might lead the water heater to not stay lit which needs to be checked on regular basis.

Yes! All the water heaters manufactured by Rheem are certified under the Energy Star and are designed to conserve energy.

Well, that’s all regarding the best Rheem water heaters available in the market. To wrap things up, these water heaters are engineered to deliver instant and an endless supply of hot water, whether you use it at your home or the office. Regardless of which one of these models you choose to buy, they are all high-end units that guarantee high performance and continuous hot water supply. Cheers!

In Hurry? Editor's Choice
Rheem RTG-84XLN-1 Tankless Water Heater