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Rheem

Rheem 240V Heating Chamber RTEX-13 Residential Tankless Water Heater, GRAY

    • Based on 1,236 reviews
Condition: New
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$281.90 Why this price?

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Availability: In Stock.
Fulfilled by Amazon
Arrives Tuesday, Dec 24
Order within 11 hours and 28 minutes
Available payment plans shown during checkout

Features

  • External adjustable digital thermostatic control with LED display (+/1 degree accuracy
  • Durable Copper immersion two heating elements, field Serviceable.Self-modulating power control
  • Simple installation 1/2 NPT adapters included; side 1/2 inch Compression water connections
  • 99.8% energy efficient. External controls to adjust temperature in increments of 1f. Water-Saver Shower Head 1.5 GPM
  • Threaded for easy replacement, simple installation, digital temperature display 54 A. 13kW Model Flow Rate: up to 3.17 GPM
  • 54 A

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: LED Display


Color: Gray


Wattage: 13 KW


Brand: ‎Rheem


Product Dimensions: ‎1"W x 1"H


Special Feature: ‎LED Display


Color: ‎Gray


Wattage: ‎13 KW


Voltage: ‎240 Volts


Maximum Flow Rate: ‎3.17 Gallons Per Minute


Heat Output: ‎13 Kilowatts


Efficiency: ‎at least 99.8% energy efficient


Is Electric: ‎Yes


Manufacturer: ‎Rheem


UPC: ‎020352685328


Global Trade Identification Number: ‎28


Part Number: ‎RTEX-13


Item Weight: ‎3.96 pounds


Item model number: ‎RTEX-13


Is Discontinued By Manufacturer: ‎No


Thickness: ‎1 Inches


Item Package Quantity: ‎1


Special Features: ‎LED Display


Included Components: ‎Rheem RTEX-13 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: Tuesday, Dec 24

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.

Similar Products

Top Amazon Reviews

    • Works great - learn how to clean with no purge valves
Installed this--my first--tankless water heater 3 years ago. Just my wife and I in a 2 bath home in south Florida (warmer entering water temp than most of US). Been very pleased. Endless hot water with steady temps and no issues with competing hot water demands such as dishwasher, sinks, etc. I've been surprisingly satisfied. A few weeks ago we started noticing a drop in water pressure and some temperature fluctuations. Honestly, though I am reasonably handy and experienced, I had no idea I should be cleaning the heater annually. Long story short - cleaned the unit and everything is back to normal. More detail for those who, like me, had the water heater installed without purge/diverter valves. I had only copper piping and no way to flush the heater. Read about some people who used a plumbing circuit involving a washing machine, but couldn't see that working for me. So, I went to Home Depot and spent about $170 on a purge valve kit, copper fittings, pipe, solder, flux, etc., ready to re-plumb my water heater and install purge valves. As I removed the compression fittings attaching the copper pipe to the heater I thought, "why don't I just attach hoses directly to the unit and skip all the plumbing?" That's what I did and it worked beautifully. In my case, I purchased 10' of clear plastic tubing, cut it in half and attached to the heater with band clamps. Used a 1/4hp pump in a 5 gallon bucket and flushed the tank for around 60 minutes. I changed the direction of the flow at about 30 minutes, not sure whether or not it helped but seemed a good idea. Returned almost everything I bought for the project, went home and took a nice long hot shower. ... show more
Reviewed in the United States on June 7, 2024 by gcp
    • Easy install
Install was easy. This little heater surprised me, Gets the water scolding hot
Reviewed in the United States on May 19, 2024 by mckayla
    • An excellent Rheem product!
I paid about $240 for this unit, servicing a 1300 sq ft cabin with 1 full bath, a half bath, dishwasher, washer and a kitchen sink. Item works extremely well, water gets hot in bathroom almost instantly, the unit in in basement below bathroom. Kitchen is about 20 ft away on first floor and it takes about 45 sec to get fully hot. Upstairs bathroom gets hot in about 2 minutes being furthest away and having a long run of pipe to get to. I did all the labor myself and put in a 60 amp breaker in my panel and it cost about $500 total with parts. The 6/2 romex wire cost about $150 for 50 ft so that was priciest part aside from unit. If you have any sort of building ability just put it in yourself and save the $$. All it needs is connected to water lines and the wire run from panel to the unit, it takes 2 hot wires and a ground (240v, all the power gets dumped into the heating element so no return voltage with neutral wire). I replaced an 80 gallon Rheem electric tank heater that was almost 30 years old and working fine until I flushed the tank and probably broke rust off the heating elements so it started tripping the breaker constantly. I am now saving a ton of electric costs in not having to heat 80 gallons of water for a smaller home that doesn’t need that much. I noticed if you run the shower, washer and dishwasher at same time the temp will cycle between hot and colder water in the shower because it can’t handle that many high flow items at same time. A shower and dishwasher or shower and washer at same time no problem however. I can’t recommend this unit more, I tell people about it all the time! Great value for money, especially if you install it yourself. Just follow directions to the letter and make sure you use proper breaker types in your panel (QD vs QO, etc). ... show more
Reviewed in the United States on September 6, 2021 by Michael Krimm
    • Neat, But only for water preservers
Worked, fair price, easy to install, but it could not heat our one rainfall shower alone. inlet temp of 37-47F, the box says it can handle a shower at that inlet temperature, however, our water pressure is too much for it to keep up with. It was barely warm, which is very generous. More like, it wasn’t cold. Now, can it heat a sink to scorching temps? yes. two sinks at the same time? no. In that instance, both will be mediocrely warm, and the temperature will not stay consistent at all. 3/4” main water line with 1/2” lines connecting to each of our systems. I would only recommend this unit if you had an inlet temp of 60+ and are single. ... show more
Reviewed in the United States on April 10, 2023 by Rita

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