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Your cart is empty.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.
The Golightly’s
2025-08-08 15:05:47
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!
Scott H.
2025-07-27 16:33:05
Very good hot water heater! Has a heat adjuster and works perfectly!
Joanne L. Habibi
2025-06-24 17:08:54
The small Rheem Tankless water heater I ordered on May 3, 2023 quit working one year later. I immediately went online and purchased the exact same unit again, planning to return and get a refund on the old one once it was removed and the new one replaced. When I contacted Rheem to get a return authorization and refund, they said they would not take it back and I should keep it and use it for replacement parts! REALLY? That was the most ridiculous thing I've ever heard. They said I should have called when the old one quit working so they could troubleshoot over the phone. I barely know where my water heater is located and certainly was not prepared to crawl around under the sink to figure out why their defective product quit working. I simply called the plumber to remove the old one (just 1 year old) and replace it with the new one I'd ordered. Now I'm stuck with a used Rheem Tankless water heater that doesn't work. I'LL NEVER BUY ANY RHEEM PRODUCT AGAIN. If that's how their customer service responds, in the future I will go with another manufacturer who stands behind their product without excuses!
Shelby Nicholson
2025-06-03 17:41:45
Installed one year ago, and we have no issues. Ours is working great!
Customer
2025-05-07 17:01:53
Great value and easy to install ! Saves money on the electric bills too by not running constantly!
rkr
2025-05-05 13:50:00
If your water heater is a long way off plumbing-wise then you know how long, aggravating, and wasteful it is to run the tap till you get hot water.This unit provides *warm* water after about 7-8 seconds and is fully heated after 15 seconds vs. the nearly two minutes we used to wait. I lollygagged for three years before I finally bought one of these on-demand heaters.Only thing is these on-demand heaters need a dedicated 240 Volt 60 A circuit and uses 6 ga wiring. You aren't plugging this thing into any regular outlet. Wire this thick, stranded of course, was still quite difficult to get connected to the interior terminals due to having to bend to fit inside the unit. But once installed it's doing what I wanted.
Mark Urso
2025-05-02 12:12:26
I have two in operation - they work well, especially if you live alone!
Ben Capobianco
2025-04-22 18:25:59
came fast good brand reliable
Alex
2025-03-05 14:01:20
works great but to tooo.. expensive
Cesar Paez
2025-02-14 16:59:18
Muy mal producto. No cumplió con lo esperado. Jamás calentó lo suficiente.
k Zweers
2024-12-16 12:51:31
Second try at a tankless. First was too small but this unit works great. Happy purchase
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