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Rheem RTE 18 Review

Rheem RTE 18 Review

Rheem RTE 18 Pros and Cons

The Pros

The Rheem RTE 18 is an Electric tankless water heater that is capable of producing up to 5.0 Gallons per Minute which is great for 1-2 bedroom homes. This affordable and reliable unit is not only perfect for point of use applications but is also Energy Star Certified which makes it very energy efficient.

The Cons

Although the Rheem RTE 18 is good for small homes, it most likely will not be large enough to cover an entire houses hot water usage. In order for you to have enough continuous hot water for your home, you will need to get a larger unit that is capable of more hot water output.


The Rheem RTE 18 is great for smaller applications and for the price is a very great value. People who have purchased this tankless water heater were satisfied with it's overall capabilities. Based on the information and reviews I have read, I would recommend the Rheem RTE 18 to anyone needing a point of use application.

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Rheem RTE 18 Review

About the Manufacturer

Rheem was a pioneer in the water heating industry due to their well liked product line and distribution network in throughout the United States. They are known for quality because they frequently test their products and get them certified and tested by third party companies. The Rheem RTE 18 is another example of a great product made by Rheem.


The Rheem RTE 18 has some really good features and benefits including it's compact size that makes it very simple to install. This unit has LED that indicates when the unit is active and is also Energy Star Certified which will definitely help you save on your monthly energy bills.

Here is a list of some additional features:

- Up to 5.0 Gallons per Minute

- Energy Star Certified

- Rugged brass/copper heat exchanger

- 10 year warranty on heat exchanger and 1 year warranty on parts

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Where to buy the Rheem RTE 18

You will be able to buy the Rheem RTE 18 at different retail stores or places online. I have researched and found that Amazon typically has the lowest prices and best deals on tankless water heaters. They should also have an option to buy used so I would make sure and check with them first.

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