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Rheem

Rheem 11kW 240V Tankless Electric Water Heater

  • Based on 428 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Amazon
Arrives Thursday, Aug 7
Order within 7 hours and 46 minutes
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Features

  • ON/OFF Dial Control with adjustable digital temperature display
  • Self-modulating power control
  • 11kW Model Flow Rate: up to 2.68 GPM
  • Side 1/2" NPT water connections
  • On demand, consistent and continuous hot water

Description

The Rheem Perfomance RTEX-11 is an 11 kW tankless electric water heater ideal for point-of-use applications. This unit is great for a point-of-use application, Rheem tankless electric water heaters offer a continuous, endless supply of hot water. A lower kilowatt unit can provide hot water on demand for single or multiple point-of-use applications while a higher kilowatt unit could provide hot water for a whole house depending on the inlet ground water temperature. Tankless electric water heaters save space, save energy, save money, and require no venting. The sleek, compact size, 90 percent smaller than a tank, allows you to save space and place the unit wherever you want, including under a sink. Tankless units only draw energy when hot water is flowing, while traditional tanks are constantly drawing energy to keep the water in the tank at the desired temperature.

Brand: Rheem


Product Dimensions: 8.25"W x 12.63"H


Special Feature: LED Display


Color: Gray


Wattage: 11 KW


Brand: ‎Rheem


Product Dimensions: ‎8.25"W x 12.63"H


Special Feature: ‎LED Display


Color: ‎Gray


Wattage: ‎11 KW


Voltage: ‎240 Volts


Maximum Flow Rate: ‎2.68 Gallons Per Minute


Heat Output: ‎11 Kilowatts


Efficiency: ‎99.8%


Style: ‎Water Heater


Maximum Operating Pressure: ‎150


Maximum Pressure: ‎150 Pound per Square Inch


Mounting Type: ‎Wall


Is Electric: ‎Yes


Manufacturer: ‎Rheem


UPC: ‎020352685380


Manufacture Year: ‎2023


Global Trade Identification Number: ‎80


Part Number: ‎RTEX-11


Item Weight: ‎7.04 pounds


Country of Origin: ‎China


Item model number: ‎RTEX-11


Is Discontinued By Manufacturer: ‎No


Finish: ‎Stainless Steel


Shape: ‎Rectangle


Installation Method: ‎Wall Mount


Item Package Quantity: ‎1


Special Features: ‎LED Display


Usage: ‎Inside; Professional


Included Components: ‎Fittings, Aerators


Batteries Included?: ‎No


Batteries Required?: ‎No


Date First Available: January 19, 2017


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Thursday, Aug 7

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Similar Products

Top Amazon Reviews

    • beats cold water
Style: Water Heater
bought to replace a rheem 9. works perfectly. nice thing is i was given same day delivery so it was waiting for me on the porch this morning. easy installation. just undo the old. install the new.
Reviewed in the United States on June 22, 2025 by Jon D
    • Great product
Style: Water Heater
I bought this water heater for a 450 square ft home. It was a great price. It meets all my needs quickly and efficiently!
Reviewed in the United States on May 26, 2025 by Sherri
    • Don't heat water fast enough
Style: Water Heater
Nice and small unit . But not real impressive. If you just barely turn water on to a trickle it heats up water hot. But the higher you turn on water the colder it gets.... the unit does not have enough chambers to heat up the water fast enough... no I would not buy again
Reviewed in the United States on April 19, 2025 by Bill Waffle
    • Energy efficient and works great
Style: Water Heater
We have been using this unit for over a month and it works great. It heats the water within seconds and it is so much more energy efficient than our old unit which is constantly heating 50 gallons. I feel like the whole world needs to go to these and leave the dinosaur hot water units in the past. We are always looking for simple ways to live better and this fit right into that equation. We only have one bathroom so the 11v is plenty for our needs. If you are supplying hot water to multiple places at once then you may consider a larger unit. If you can manage your use to varied times a smaller unit would likely still serve you well. Doing our part to save resources! ... show more
Reviewed in the United States on September 2, 2024 by The Golightly’s
    • 11 KW is fine for a smaller home.
Style: Water Heater
The bad: Product was missing wire holder and crimp mechanism for keeping the cable in place and without stress. But this is a returned item, although the description did not say anything was missing. The GREAT: When I installed it and finally found how to wire it, the water temp was GREAT. I really like that it only uses electricity when water is flowing and it does not take but about 30 seconds to warm up to 125 degrees at the faucet. This size is great for a tiny home with 2 bathrooms and a kitchen and one shower. I would have given it 5 stars but for the missing hardware. Wiring it is 240 Volts, Black to one terminal, red to second terminal green yellow or white to ground, and using a 40 amp 2 pole circuit breaker black on one side and red on second side and green or white wire to ground. (depending on how many wires your cable has). I have been using it for 4 days and it works great, glad I switched from a tank system. ... show more
Reviewed in the United States on May 18, 2025 by Debbie Brown
    • More closet space
Style: Water Heater
Perfect replace for old water tank. Gave me more closet space too.
Reviewed in the United States on July 21, 2025 by Seafevor
    • Quality
Style: Water Heater
Quality and well designed.
Reviewed in the United States on June 1, 2025 by Ross
    • Worth it!
Style: Water Heater
Pretty happy with this so far. We have a weekend house and space was tight. Was skeptical about how well this would work…it is a champ so far. Been about 6 months. Amazed at how easy it installs (I am an electrician) and how compact it is. Keeps up even while showering! Pleasantly surprised!
Reviewed in the United States on March 15, 2025 by Mark Heikkila

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