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Rheem Water Heater : The Ultimate Buyers Guide

November 2, 2021
Illustration of three types of Rheem water heaters including an electric model, a hybrid model, and a gas vent model

Is it time to invest in a new hot water heater for your home? There are many reasons why you might be nodding your head.

Perhaps your hot water levels are lower than normal. Or, you could be hearing some rumbling coming from your unit, sniffing a strange smell, or noticing a leak. Either way, a high-quality tank that provides an adequate supply of hot water is a necessity for a comfortable home.

Yet, it doesn’t take long to realize that there’s more than one manufacturer on the market. How can you know which one offers the best warranty, energy efficiency, value and more? That’s where we come in! Today’s water heater reviews cover all of these features and more so you can make an informed buying decision.

About Rheem Water Heater

Rheem water heater are well known for their high-quality products and innovations. Founded in 1925 by the Rheem brothers, the Rheem manufacturing company now have over 6000 employees worldwide and generates around 2.10 billion in sales (USD). If you are looking for a new water heater, Rheem manufacture excellent products and all you will find all information to help you choose your next tank in this article.


All Rheem equipment comes with a Certificate of Limited Warranty that includes all of the warranty details for each product. This limited warranty can span anywhere between five and 12 years depending on the specific model selected. Some terms even provide a warranty for labor in the first few years.

In addition, customers can select to purchase an extended Protection Plus Plan if they’d like to extend their warranty for another four years. This plan will add four years to your limited warranty. This extended warranty normally cost between $150-$200 and can be purchased across multiple authorized vendors.

Rheem warranty will depend on the series you choose.

SeriesLength of Warranty
Classic6-year Limited
Classic Plus8-year Limited
Prestige12-year Limited
Marathon6-year Limited parts, Lifetime tank

Technical support

Rheem’s technical support resources are robust, offering assistance for both commercial and residential users. Its Homeowner Resource Center includes myriad downloadable guides, Frequently Asked Questions, information on relevant rebates, serial number locators and more.

There is also a vast collection of product education resource designed to help homeowners learn as much as possible about their new units. Virtual guides cover such topics as “How Old is My AC?” and “How Old is My Furnace?” If users still need extra support, they can use the online “Find a Pro” tool to help them connect with a local Rheem expert in their area who can troubleshoot the issue.

Energy Efficiency

It might sound like a tall claim, but Rheem touts its Hybrid Electric Water Heater as being the quietest, smartest and most energy-efficient model on the market.

In less than three years, users can begin to see a return on their investment thanks to the unit’s 3.55 uniform energy factor. In addition, users can save money on utility costs in the long run thanks to features that offer quick leak detection, service notifications, and other protective alerts.

In addition, Rheem’s other tank-type electric heaters are equally energy-efficient. Most of the models in the line, including the Professional Prestige Series and Professional Classic Plus Series, feature an UEF of 0.90 to 0.93.

Technological Advances

Rheem has long led the way in high-tech water heaters, and its most recent models are no exception. Take the RXTEX-13, for instance. This tank features an on-unit thermostat, along with a digital LED screen that makes it easy to see the exact temperature within. Users can attach the unit to any .5-inch water connection. In addition, Rheem’s gas tank water heaters are some of the most tech-savvy on the market.

The Professional Prestige Series: Powered Damper model, for instance, features EcoNet technology that allows users to integrate it with their home automation, energy management, and on-demand response systems. This brand is synonymous with innovation and continues to roll out product updates and special features designed to accommodate future-focused homeowners and business owners alike.

Rheem Sustainability

Today, choosing an eco-responsible business is very important for many consumers. In addition to having quality products, you can be assured that they are manufactured with special attention to the environment.

With their goals for 2025, Rheem stands out from the competition :

  • Launch a line of heating, cooling and water heating products that boast a 50% reduction in greenhouse gas footprint.
  • Reduce greenhouse gas emissions by 50% and achieve zero waste to landfill in our global manufacturing operations.
  • Rheem will train 250,000 plumbers, contractors and key influencers on sustainable products or sustainable installation and recycling best practices.

This commitment demonstrates that Rheem cares about the environmental impact of their products. As of today, Rheem already removed some packaging material that ended up in the garbage, covered 95% of their facility to LED lightning and saved over 234M gal of water.

Rheem series

Rheem water heater includes several series that will fit your budget and needs. Most popular Rheem series are : Classic, Performance, Professional and Marathon.

Rheem Marathon water heater are made of wound fibreglass to prevent any corrosion that will happen inside the tank. Marathon series don’t need any magnesium anode rod since they don’t corrode. Those maintenance free tank are more expensive but will last longer.

Rheem Gas Water Heater

  • Lower monthly energy costs
  • Heats the water faster
  • Comes in a range of sizes
  • High energy-efficiency models available
  • Able to use during a power outage

Rheem Electric Water Heater

  • Lower upfront costs
  • Less maintenance
  • No safety concerns
  • Less energy loss
  • Available in a range of sizes

Rheem Tankless Water Heater

  • Heats the water faster
  • Less maintenance
  • No safety concerns
  • Less energy loss

Representation of Corro-Protec powered titanium anode rod
Representation of Corro-Protec powered titanium anode rod
Representation of Corro-Protec powered titanium anode rod
Representation of Corro-Protec powered titanium anode rod
Representation of Corro-Protec powered titanium anode rod

Do you know Rheem products? It’s time you knew!

Rheem water heater are well known for their high-quality products and innovations. Founded in 1925 by the Rheem brothers, they manufacture excellent products.

Rheem water heater includes several series that will fit your budget and needs. Most popular Rheem series are: Classic, Performance, Professional and Marathon.

As some series might be a little bit more expensive, why not select the appropriate powered anode to protect your investment.

The Corro-Protec powered anode rods work on all standard hot water heaters and can prolong and double the lifespan of your tank.



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