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Rheem 3.5kW 120V Point of Use Tankless Electric Water Heater

  • Based on 178 reviews
Condition: Used - Like New
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Availability: Only 1 left in stock, order soon!
Fulfilled by Amazon

Arrives Wednesday, Jul 16
Order within 7 hours and 18 minutes
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Features

  • Compact and stylish with digital temperature control in increments of 1f ranging from 80f to 140f
  • RTEX04 and RTEX06 only show output temperature and are non thermostatically controlled

Description

The Rheem Performance RTEX-04 is a 3.5 kW tankless electric water heater ideal for low flow point-of-use applications. Typically this unit is installed at the point-of-use and hard wired to 120 volts requiring a 30-amp breaker. 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: 10.88"W x 5.88"H


Special Feature: LED Display


Color: Gray


Wattage: 3500 watts


Brand: ‎Rheem


Product Dimensions: ‎10.88"W x 5.88"H


Special Feature: ‎LED Display


Color: ‎Gray


Wattage: ‎3500 watts


Voltage: ‎120 Volts


Maximum Flow Rate: ‎6 Gallons Per Minute


Heat Output: ‎3.5 Kilowatts


Efficiency: ‎99.8% Energy efficient


Style: ‎Water Heater


Maximum Operating Pressure: ‎150


Maximum Pressure: ‎150 Pound per Square Inch


Mounting Type: ‎Wall


Is Electric: ‎Yes


Manufacturer: ‎Rheem


Item Depth: ‎3 inches


UPC: ‎020352758008 020352682990


Global Trade Identification Number: ‎90


Part Number: ‎RTEX-04


Item Weight: ‎4.5 pounds


Item model number: ‎RTEX-04


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: Wednesday, Jul 16

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.

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Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Top Amazon Reviews


  • Great Product - IF YOU KNOW WHAT YOU ARE BUYING
First - I'm not new to tankless water heaters so I know what I am doing and know what I am getting going in. For my situation - I have a small 1 bedroom condo the Bathroom kitchen are all sharing the same wall. It will be centrally located less than 4ft from all facuet points. I live in Florida and my input ground water temp is almost 80 degrees year round. on top of that I was replacing an older 30 gal water heater that had #10 already ran to it (required for this one) and it was coming off a dual 30 amp which meant I could come off one side and get my 30amp 120 which is what this needs - and if i didnt like it I could upgrade to the 06 and it would take less than 15 min and this could sit in the closet as a back up. the key is to really understand the the flow rate and how it effects your temp as well as distance. in some some times its better to go with lower power and shorter distances which will have less heat loss as is my case. the con / recommendation if you buy one - get youself a very thin nut or a very fat washer for the npt connector depending on your installation you may have a leak and no more adjustment - im taking mine down adding a nut then a silicone washer - rethreading - then if i still have the leak i can adjust the extra washer down the great thing - its super easy to do that - flip its breaker - take it off the wall do what you need - and your done. ... show more
Reviewed in the United States on October 11, 2017 by chris crum

  • Almost felt scammed.
Barely was worth the install on my kitchen sink. It did warm up the water to hot but just barely. Then a little over a year later it just stopped working. Screen went blank, water flow no longer produced warm water. Complete waste of $250.
Reviewed in the United States on February 2, 2025 by Jason B.

  • Compact but efficiant
Compact but efficient water heater bought this to replace the water heater in my camper fits perfectly in the small spot I had for it. Heats water fast and stays hot.easily installed
Reviewed in the United States on May 17, 2024 by Amazon Customer

  • Not worth the money
It doesn’t heat up if you turn the water on half way it can only be used when water runs Verry slow
Reviewed in the United States on February 5, 2020 by Ray.Merrill

  • WARM WATER,not HOT
The water heater did not meet expectations. 105° Maxium temperature @ 1/2 gallon per minute. It says it will Service 2 or 3 sinks. It will not Service 1 sink. 105° water is warm, not hot by any standard. Since it is 110-120 volts a.c. I assumed it literally plugged into a wall receptacle. NO, it had to be hard wired with 10 gauge wire. I even call the HELP LINE. I knew more about the heater than the Representative after I had installed it. ... show more
Reviewed in the United States on December 20, 2019 by Larry K

  • VERY disappointed
After a lot of work re-routing water lines for this unit to use for our shower, I was saddened to see how long it takes (3-4 minutes) for this device to produce water above skin temperature of 98 degrees. Our shower is a long way from the main water heater and we had to wait several minutes waiting for hot water to arrive. With this Rheem it takes about half that time; not "instant" at all. So we're not saving water or electricity as much as we hoped, or if at all. If this unit could be turned on before turning on the water flow, perhaps then hot water would be ready when we want it. Since it only activates itself when it senses water flowing through it, that's sadly not an option. Neither Rheem nor Amazon have responded to my requests for help. ... show more
Reviewed in the United States on July 10, 2024 by Jim D

  • Great product
This works great and heats up our water perfectly
Reviewed in the United States on May 10, 2024 by Micheal Sanford

  • Defective Units that do not work right out of box - DO NOW BUY
Purchased two of these point of use tankless electric water heaters. Purchased 10 guage wiring as recommended and purchased new 30 amp breakers. Then paid a professional also recommended t come install them, only to have each unit never power up. Even had a 2nd professional come out to look at it and he confirmed that both units must be defective. DO NOT BUY this product it is a waste of time and money. ... show more
Reviewed in the United States on February 10, 2024 by John

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