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Extended holiday returns
FREE refund/replacement until Jan 31, 2027 Learn more
FREE refund/replacement until Jan 31, 2027 Learn more
This item's return window has been extended for the holiday season: FREE refund/replacement until Jan 31, 2027
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
Availability:
In Stock.
Arrives
Sunday, Nov 15
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At a glance
- Condition
- New
- Style
- Point-of-Use, 11 kw
- Model
- RTEX-11
- Capacity
- 2.68 gal
- Dimensions
- 8.25"W x 12.63"H
- Weight
- 3.2 kg
- Color
- Gray
- In the box
- FittingsAerators
Features 9
- Get the performance you expect. Choose the right size water heater for your home and verify electrical requirements before installation. When properly sized and professionally installed, Rheem Tankless Electric Water Heaters deliver reliable, on-demand hot water while saving valuable space.
- 11kW model provides up to 2.68 GPM
- Multiple fixture applicatons
- Wiring Requirements (RTEX11): Requires 240V singlephase power, one- 50amp doublepole breaker, one set of #8 AWG copper conductors with ground, and a recommended minimum 100amp household electrical service panel for proper operation
- Digital thermostatic temperature controls in 1-degree increments ranging from 80F - 140F (26C - 60C)
- Saves Energy - Tankless electric water heaters only heat water when a hot water tap is turned on. By heating water only when needed elimantes energy used to maintain desired water temperature in standard tank water heaters.
- Save Space Without Sacrificing Hot Water - Compact design that frees up valuable floor space, 90% smaller than traditional tank water heaters
- No Venting required to operate, simplifying the installation process compared to a tankless gas water heater
- Warranty: 5-Year Leak, 1-Year Parts
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.
Specs 30
| Brand | Rheem |
|---|---|
| Capacity | 2.68 gallons |
| Power Source | ['ac'] |
| Product Dimensions | 8.25"W x 12.63"H |
| Special Feature | LED Display |
| Special Features | LED Display |
| Wattage | 11 KW |
| Voltage | 240 volts |
| Flow Rate | 2.68 gpm |
| Maximum Temperature | 140 °F |
| Heat Output | 11 KW |
| Efficiency | 99,8% |
| Maximum Pressure | 150 |
| Mount Type | Wall |
| Item Dimensions W x H | 8.25"W x 12.63"H |
| Item Weight | 3.2 kg |
| Material Type | Stainless Steel |
| Brand Name | Rheem |
| Model Number | RTEX-11 |
| Number of Items | 1 |
| Unit Count | 1 Count |
| Manufacturer | Rheem |
| Manufacturer Warranty Description | Limited lifetime warranty |
| UPC | 020352685380 |
| Manufacture Year | 2023 |
| Global Trade Identification Number | 80 |
| Item Type Name | Water Heater |
| Manufacturer Part Number | RTEX-11 |
| Color | Gray |
| Style Name | Point-of-Use, 11 kw |
No specs match.
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Sunday, Nov 15
Yes, absolutely! This item's return window has been extended for the holiday season: FREE refund/replacement until Jan 31, 2027.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Easy to use and install
Style: Point-of-Use, 11 kw
Easy to use , easy to install! Works really good and heats water fast . Is convenient. Turns off by its self. When you open the water it turns on .. so is safe ..
Reviewed in the United States on September 17, 2026 by Jaquelin M.
Tankless is the way to go
Style: Point-of-Use, 11 kw
Tankless water heaters are awesome. UPS delivered, installed in one hour, hot water. That being said, the only reason it installed so quickly was because it was a replacement. I discovered a disadvantage. The heating element shorted out against the casing and drew an arc and melted a hole in the case which flooded my basement nicely. THAT took several days to fix. As a single guy living alone I don't that much hot water. This thing saves a lot of electricity.
...
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Reviewed in the United States on June 26, 2026 by Dirtbikerdave
The water heater won't heat any hotter than 115°, and the return window closed on Oct 26, 2024.
Style: Point-of-Use, 11 kw
The water heater started off OK at 140°, but now it won't heat any hotter than 115°. It is December 16, 2024, and the return window closed on Oct 26, 2024. The thermostat is discontinued from Rheem so I can't even get parts to attempt a repair.
Reviewed in the United States on December 16, 2024 by Alan E.
HOT
Style: Point-of-Use, 11 kw
Works better than expected. H O T !!!
Reviewed in the United States on October 12, 2026 by Joe D.
So far so good
Style: Point-of-Use, 11 kw
We’ve had this installed in our pool house for a month or so. Seems to heat the water well enough for a decent shower but it’s summer at the moment. Will be interesting to see how it holds up in the winter when the inlet water is much colder. We’re in a dry warm climate and will only need this occasionally so keeping my fingers crossed. Had a plumber install so no comment there.
...
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Reviewed in the United States on September 27, 2026 by Amazonaholic
Works great!
Style: Point-of-Use, 11 kw
Works great! I've had this for a couple years now and it's worked flawlessly. I have done zero maintenance to it as well. Perhaps I should, but haven't yet?
Reviewed in the United States on October 16, 2026 by Rickster
Water heater
Style: Point-of-Use, 11 kw
I but for 4 bedroom house i work really good.
Reviewed in the United States on September 23, 2026 by Kiara Rodriguez
Cheap Plastic Unit - Bad Design Choices For Install
Style: Point-of-Use, 11 kw
Two very small things makes installing this more difficult than it should be. Whoever decided to secure the cover with two small screws FROM THE BACK is an idiot. You have to run the wiring on the front of the unit, then you can secure the cover from the back and then you can hang it. Makes no sense. You can't get to the screws once hung. It would be really nice if you could hang it and be done, then do your electrical, then put the cover on. Screws should be on the front! Jesus. Most of the unit is cheap plastic. The outlets are not pipe thread so they supply two adapters. Even with tape and sealant the adapters went all the way on and it was difficult to stop drips. Not sure why the dumb adapters vs starting with pipe thread. Be careful as you're building your bypass kit on each side. The metal parts are held together inside with plastic. One twist and the unit with snap. You'll need to hold the outlet while tightening everything else.
...
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Reviewed in the United States on July 14, 2026 by Nick ATX