Rheem RTE 13 Electric Tankless Water Heater, 4 GPM

Today tankless water heater has a great demand. In the field of the tankless water heater, Rheem is a popular brand. One popular unit form this brand that has gained some attention is the Rheem RTE 13. The Rheem RTE 13 is a compact electric tankless water heater. You can use this water heater for residential or industrial applications. The heater requires 0.4 gpm to activate its heating elements. It can put out a maximal flow of 4 gpm. It is enough to supply both a showerhead and bathtub. The RTE 13 uses a rugged brass and copper heat exchanger. It carries an energy star certification. It can save energy by modulating power consumption. Therefore, this unit can be a good choice for anyone.

RTE 13 Electric Tankless Water Heater

Technical Information on Rheem RTE 13:

  • Model Number: RTE 13
  • Product Dimension: 7.2*7.2*7.2 inches
  • Length: 10
  • Width: 7-1/4
  • Weight: 8
  • KW: 13
  • Volts: 240
  • Wattage: 13000 watts
  • Colour: Multicolour
  • Flow Rate: 4 GPM
  • Item Package Quantity: 1
  • Warranty: 1-year parts warranty, 10-year Heat exchange warranty

Best Features of Rheem RTE 13

  • Simultaneous Hot Water Supply:

Rheem RTE uses a different heating mechanism. It does not need to use any type of water container.  It redirects the water to flow through heating components. Therefore, hot water is always available at any time. It stops using electric power source as soon as you turn the appliance off. It does not have to keep on using electric power to maintain hot temperature. In this mechanism, hot water will always be available, as you need it.

  • Energy Efficiency:

Rheem RTE is an ENERGY STAR® rating unit. Therefore, the energy efficiency of the Rheem RTE 13 is very high. The heat exchanger ensures no standby heat loss. It can help to conserve energy. Yet the appliance can help to reduce your monthly electricity bills.

  • Easy to Install:

This Rheem RTE 3 is easy to install. It is ready to install as you get it out of the package. There is no need to assemble many small parts. It can direct mount to water pipes. Therefore, the installation process is hassle-free. When it comes to plumbing installation, it uses standard ½ Inches water connection. This model requires a 60-amp breaker and 6 gauge wires. You may do not have experience working with plumbing and electricity. It is best to hire a professional to do the installation.

  • Compact Design:

Space is a concern in water-heating appliance industries. Tank water heater is larger than its tankless counterpart. Total dimension measures only at 7.5-inch L*7.5 inch W*7.5 inch H. It is compact enough to pair with almost any appliance in the house. Like the kitchen sink, shower, dishwasher and bathroom sink as well.

  • Modulating Power:

RTE 13 provides you with a continuous flow of on-demand hot water with saving electric charges. It can maintain a constant output at the desired temperature. It offers to modulate power control. This technology ensures the unit only runs when a faucet is open. It uses as much energy as it needs to provide hot water to that faucet. It ups its energy use when you use more hot water.

  • Temperature Control Unit:

This feature allows you to set the temperature. A temperature change dial on the front of the water-heating appliance allows you to set the temperature. In this way, you can customize the temperature of the unit. It is based on the average temperature of water in your area.

The specialty of Rheem RTE 13 Electric Tankless Water Heater :

  • Continuous hot water on demand
  • Industry-leading low-flow activation
  • External temperature control
  • Ragged brush/copper heat exchanger
  • ½ inch water connections
  • Need no venting


  • Small unit
  • Easy to install and operate
  • Less expensive than another heating unit
  • Energy efficient unit
  • One-unit temperature control
  • Can heat 4 gallons per minute


  • The installation may need other components like pex or plastic water line.


 They are available, and you can buy them separately.

  • It uses large electric power compared to others.


Not like the tank water heater.


Question: 1 Will this provide enough hot water for a shower?

Answer: The Rheem RTE 13 is a tankless water heater. It doesn’t store water. It continues heat water non-stop. So no matter how long the shower time is. As long as you have power and water, then the hot water is limitless.

Question: 2 Can I install this Rheem RTE 9 in a motorhome?

Answer: Yes, you can install.

Question: 3 what is the amp power for this unit?

Answer: This model uses a max of 54A. So it needs a 60A breaker.

Question: 4 Can I use my existing 220 line to power unit I am replacing a 3-gallon tank?

Answer: Yes, It uses 220 lines.

Question: 5 Is Rheem RTE 13 electric tankless water heaters noisy?

Answer: No, it doesn’t make any noise.


Rheem has grown to become the largest producer of water heating products. Its label has developed a loyal customer base. Rheem Tankless water heaters are the most popular model on the market. An affordable tankless water heater fits in your budget. It has some limitations. Yet, it is a perfect fit for a single person or couple. people who love to experience taking a nice hot shower. Rheem electric tankless water heater reviews are quite impressive. Rheem tankless water heater reviews have been very pleased with the performance. It does as it supposed to do. It can heat water very fast. Many users found that it is a great replacement for their older one. It is one of the best-selling water heaters. So you can try this unit. It can be a good choice for you.

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