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Rheem RTEX-13 Review – (Electric / Whole House)


Rheem-RTEX-13-240V-Residential-Tankless-Water-HeaterThere is no reason why you should struggle with the normal residential water heater that most of us have in our homes. With the Rheem RTEX-13 residential tankless water heater, you will have so much more benefits from. The Rheem tankless water heater is one of the residential tankless water heaters that you can purchase.

There are different types of high-efficiency water heaters you can purchase, but this one might be one of the best ones for residential use on the market. With this review, you will see that this might be the solution to your problem with your normal residential water heater.


There are some great features of this water heater that you should know. This is to make sure that you know that the water heater that you are considering purchasing has all the features that you are looking for.

This is a residential water heater, but it doesn’t have a tank build-in. Meaning that you don’t have problems with a tank that can burst or start leaking. It has an external adjustable thermostat control. Making sure that you are able to adjust the heat of the water according to your liking. Also, making it easier to control the heat of the water.

It is energy efficient. Something that we are all looking for these days. Ways to save energy is also going to save on utility bills. It is easy to install and easy thread replacements also available with this model. It uses electricity and comes with the electrical cord that you might require for the installation. Some of the other features that you should know are:

  • The water heater has a weight of 8.5 pounds. Making the lightweight easier for installation
  • The heater is really small but powerful. The size of the heater is 4 x 9 x 13 inches
  • This is a corded electricity unit and has 240 volts output
  • It is 99.8% energy efficient. Letting you save money on your bills each month and it comes with a Water-Saver Shower Head with 1.5 GPM output.
  • The water heater has external controls to adjust the temperature in increments of 1°f.
  • It comes with everything you need to install the water heater. Included with being the 3-ft long electric cable and 1/2 NPT adapters; side 1/2 inch compression water connections.
  • Easy to install. Don’t need a professional or expert for the installations.
  • The heater has durable Copper immersion two heating elements and is also field Serviceable


Rheem RTEX-13 Residential Pros ConsBefore you can purchase your water heater, you should make sure that you know everything there is to know about the water heater. And, this will include the pros and benefits as well. These are the top benefits and pros that you can have when you are purchasing the water heater.

  • Simple Installation

    No ones want to struggle to get something like a water heater installed in your home. However, this is something that you don’t need to worry about, with the Rheem tankless water heater. The installation is easy, and you are getting everything you need to install the water heater successfully.

  • Energy Efficient

    It has a feature of 99.8% energy efficient. Meaning that you are going to save a lot of money towards your monthly expenses. It too uses electricity but it will be much cheaper at the end of the month than with using the normal residence water heater.

  • On-demand Hot Water

    Not everyone knows the benefits of having a tankless resident water heater. But, if you have had a water heater that has burst, then you will know the benefits of not having this problem.
    The water is heated directly. There isn’t any water that is lying in the tank, waiting to get hot. It uses less water, and it is safer at the end of the day.

  • Small and Lightweight

    The water heater is small and lightweight. It has a size of only 4 x 9 x 13 inches and a weight of 8.5 pounds. Making this a great water heater for the smaller apartments and homes. And, because it is so light, it is easier to install the heater all by yourself.

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It is important not to know only the pros, but to know the cons and problems as well. Without knowing the cons, you will not know if this is a water heater that you can purchase for your residence. These are the problems reported from clients that have purchased this residential water heater.

  • Not ideal for colder climates

    Because the water heater is tankless, and the water is warmed as you are using it, it isn’t really ideal for homes in the colder climate. This isn’t going to give you the hot water that you want to have, during a bath or shower. This is something to consider.

  • Need to have a 60 -Amp breaker box

    Because the water heater is making use of 54 -amp, you will need to install a 60-amp breaker box. This is because the 54 -amp is using a lot of power by just one product. The power in your home will trip frequently. Something that won’t happen with a 60-amp breaker.

  • Best for a single point of use

    In larger homes, or in areas where the weather is colder, you can only use the water heater for a single point of use. Meaning that you can only use it in one bathroom or in the kitchen. If you have more than one bathroom, you need to purchase and install more of these RTEX-13 Residential Tankless Water Heaters

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In Short

For a better option than the huge tank water heater that most homes have, you can consider purchasing the Rheem RTEX-13 Residential Tankless Water Heater. This is a lot smaller than the normal water heater, and it doesn’t use as much power to work.

There might be a couple of cons and problems reported, but this is still one of the best water heaters that you can purchase.

The Rheem RTEX-13 240V Heating Chamber Residential Tankless Water Heater is just the thing to consider for your home. This is if you are looking for a more economical way of getting hot water. It is cheaper than the original water heater, and you will save on water and electricity usage. Something that you can consider if you have a small apartment with limited access.

by Water Heater Mag

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