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Rheem

Rheem RTEX-27 240V 3 Heating Chambers Residential Tankless Water Heater

    • Based on 82 reviews
Condition: New
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$589.00 Why this price?
Holiday Deal · 12% off was $671.62

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This item's return window has been extended for the holiday season: Returnable until Jan 31, 2025

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.

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Availability: Only 2 left in stock, order soon!
Fulfilled by PEACHSTATESTEALSANDDEALS
Arrives Jan 2 – Jan 4
Order within 11 hours and 22 minutes
Available payment plans shown during checkout

Features

  • External digital thermostatic control with LED display (+/1 degree accuracy)
  • Most advanced self-modulation, adjust power to meet hot water demand
  • Durable Copper immersion three heating elements, field Serviceable
  • Simple installation bottom 3/4 inch NPT water connections
  • Threaded for easy replacement, simple installation, digital temperature display

Description

Professional classic tankless electric water heaters offer continuous hot water quick and on demand for single point-of-use or multiple applications

Brand: Rheem


Product Dimensions: 1"W x 1"H


Special Feature: External Digital Thermostatic Control, Self-Modulation, Durable Copper Immersion Heating Elements


Color: Gray


Wattage: 27000 watts


Brand: ‎Rheem


Product Dimensions: ‎1"W x 1"H


Special Feature: ‎External Digital Thermostatic Control, Self-Modulation, Durable Copper Immersion Heating Elements


Color: ‎Gray


Wattage: ‎27000 watts


Voltage: ‎240 Volts


Maximum Flow Rate: ‎0.11 Gallons Per Minute


Efficiency: ‎High


Mounting Type: ‎Wall


Is Electric: ‎Yes


Manufacturer: ‎Rheem


Item Depth: ‎3.50 inches


UPC: ‎020352685342


Global Trade Identification Number: ‎42


Part Number: ‎RTEX-27


Item Weight: ‎17.8 pounds


Item model number: ‎RTEX-27


Is Discontinued By Manufacturer: ‎No


Item Package Quantity: ‎1


Special Features: ‎External Digital Thermostatic Control, Self-Modulation, Durable Copper Immersion Heating Elements


Included Components: ‎Rheem RTEX-27 Residential Tankless Water Heater


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: Jan 2 – Jan 4

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
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  • 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

    • Works great, delivery not so great
We love how this works, keeps us in plenty of hot water throughout the home. Delivery was late, supposed to be 2 days and finally got it on the fourth day.
Reviewed in the United States on June 2, 2024 by Tim Hanus
    • The NaySayers Are Misleading; this Unit Works Fine!
I did need to install another 240V circuit to accommodate this tankless hot water heater, but my circuit-breaker box had the extra capacity, so it was simple to have done, and now, having an unlimited supply of hot water for as long as I want it is more than just convenient. No more long showers cut short by suddenly cold water! No more waiting after (or before) a shower or load of laundry for a whole tankful of water to get hot enough! No more planning out major hot-water use to avoid running out! As far as I can tell, the temperature control is accurate and dependable; I changed the setting to a few degrees higher than the installer left it, and I noticed the difference immediately. I can't imagine household use requiring a degree-by-degree control of the water temperature, but since the control is digital, why not take advantage of the capability? It's so much clearer than some "hot" "medium-hot" "medium" labels that leave everyone guessing, anyway. I bought this unit here because the price was relatively low and I could have the unit delivered to my door, instead of having to drive a 55-miles round trip for a more limited selection. I bought the unit with one level more capacity than I actually needed because the extra expense would disappear over the long life of the unit and I'd be certain never to run out of hot water. I bought the Rheem because of the brand's reputation. As for the "nay-sayers," I and some of my friends who inquired about tankless heaters were told tales of low groundwater temperatures and other things that (1) turned out not to be true and (2) didn't agree with the manufacturer's (and other professionals') information. I do not live where it gets very, very cold in winter, but neither does the plumbing contractor who advised me against this kind of heater; either he's ignorant, makes a lot more profit when he installs a hot water tank, or he's unwilling to learn about electric circuitry in 21st-century homes. If you live where winters are really long and cold, do your research and learn what you need to know, sure, but don't let misinformation keep you from having state-of-the-art hot water. ... show more
Reviewed in the United States on June 11, 2020 by D_Spider
    • Worked great for a year
Worked amazing for a year then we had a power outage in my area and got an error code reached out to manufacture on several occasions and received 0 support will not recommend
Reviewed in the United States on May 6, 2024 by ryan colegrove
    • Only review you need to read, highly recommended!
Review Image by Doug Doug
Review Image by Doug Doug
My old 80 gallon hot water tank was on it's way out so I did research on a replacement. I could replace the tank with another 80 gallon hot water heater (no thanks), I could go with a hybrid 80 gallon hot water heater (not bad), or I could go with a tankless system (ideal). There are pros and cons to each but I ended up choosing the Rheem 27kw tankless hot water heater. I read good and bad reviews on this system but I have nothing but great things to say. I had to have an electrician come and install an additional (2) 40 amp breakers and 8/2 wire for around $450 so I had a total of 3 lines hooked up to the system (essentially 1 line/breaker for each heating element). At first I was getting only luke warm water so I called Rheem tech support and the advisor was extremely helpful and told me to check a few things. Within 10 minutes it was working perfectly. (The issue had to do with the install, not the product). Be sure you're getting 240V to each element before your electrican leaves. Nevertheless, we initially set the temp to 140 and was way too hot. We dialed it down to 125 and it is perfect. We have 4 full bathrooms, kitchen, laundry, etc. We can easily have 3 showers on simultaneously. Best part is the hot water never runs out and ultimately saves you money. 2 thumbs up! ... show more
Reviewed in the United States on April 30, 2019 by Doug Doug
    • Didn’t work out of the box
This product didn’t work out of the box Terrible customer service, I sent it back for a refund on 4/15 and it’s now 6/2 and I have not gotten my money back. Lies… they say they didn’t receive it back, total BS I want my refund….
Reviewed in the United States on June 3, 2024 by David Lopez
    • Easy Set Up and even temperature
I replaced a tankless hot water heater, which cracked due unusually low freezing weather with this Rheem unit. The previous unit had significant variability in temperature. I bought the 27KW unit which is more than I needed for the house to be sure that I had adequate capacity. I am pleased with the steady temperature control and easy setting on the temperature with an LED display. While I used a licensed plumber to install the unit, it was a simple installation. I added a water filter because the water is very hard here. Amazon showed a complete kit for the heater, filter, and cut-off valves, with ports for easy draining and flushing. This will resolve concerns with hard water accumulation on the heating elements with the filter and regular flushing. The heating elements are replaceable, if needed. This unit is much more versatile than my old unit. Very pleased. ... show more
Reviewed in the United States on May 8, 2021 by RNLee
    • Easy installation, works great
A lot of very hot water for all our uses
Reviewed in the United States on January 26, 2024 by Chuck Hobart
    • Saves electricity
I selected this “hot water on demand” heater to save on my electricity bill. I’ve only had to use this a few times because I also have solar water panels. Important: turn off unit if solar water gets above 130 degrees. Also, when using this unit, any LED lights will flicker.
Reviewed in the United States on June 14, 2023 by Patty

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