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Model#: RHMNRTE-18
Condition:
New

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Manufacturer inspected, repaired and tested items; CPO 60 day money back guarantee
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Rheem RTE-18 Electric Tankless Water Heater - 18 kW

  • Rheem RTE-18 Electric Tankless Water Heater - 18 kW
List:
$549.99
Sale Price:
$429.99
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Product Overview

Additional Information

Details

Continuous, on demand, hot water and a compact design means this Electric Tankless Water Heater is perfect for point-of-use applications.
Features:
  • Can heat a maximum of 5 gallons per minute
  • Energy efficient when compared to traditional water heaters
  • On-unit temperature control
  • LEDs indicate active element and standby mode
  • Standard 1/2 in. water connection
  • Rugged brass/copper heat exchanger
  • Great for homes, condos, hospitals, boats, offices, laboratories, and anywhere hot water is needed
Includes:
  • 18 kW Electric Tankless Water Heater - RTE-18

Specifications

Weight: 12 lbs.
Activation Flow: 0.40 GPM
Amperage: 75
Application: Point-Of-Use
Kilowatts: 18
Required Breaker: (2) 40 Amp
Water Connection: 1/2 in. NPT
Wire Size: (2) 8 Gauge

Reviews

Product Reviews

Questions & Answers

Do you have questions about this product?

Get answers from real customers and in-house experts with AnswerBox.

20 Questions | 27 Answers
Displaying questions 1-20
  • Electric Tankless Water Heater - 18 kW

    Q:

    How long do they last....
    Asked on 5/3/2016 by Johnny from Columbus ohio

    3 answers

    • Staff Reviewer

      A:

      The Applicable Warranty Periods are ten (10) years from the Effective Date for the heat exchanger and three (3) years from the Effective Date for the component parts if the water heater is installed in a single-family dwelling. If the water heater is installed anywhere other than a single-family dwelling or in any system in which the water is recirculated, the Applicable Warranty Periods will be limited to one (1) year from the Effective Date.

      Answered on 5/4/2016 by Dennis from Atl
    • VERIFIED BUYER

      A:

      It' been interesting regarding your question! Our first one lasted almost 5
      years. One part failed and couldn't be fixed or replaced. Second unit two
      of the elements failed before the first year was up. They sent us a new one
      under warranty and everything has been fine. I love the tankless heaters
      but can't give you a definitive answer on how long they last.

      Answered on 5/4/2016 by Anonymous
    • VERIFIED BUYER

      A:

      we installed them in 2015, and they are still working

      Answered on 5/3/2016 by Anonymous
  • Electric Tankless Water Heater - 18 kW

    Q:

    what is the cost of installation
    Asked on 3/25/2016 by Jim from Arlington Tx

    1 answer

    • Staff Reviewer

      A:

      Installation cost will vary. We recommend contacting local installers for a quote.

      Answered on 3/28/2016 by Ray from Atlanta
  • Electric Tankless Water Heater - 18 kW

    Q:

    What are the dimensions of this particular unit? Maybe I just missed them in the Specs? I see weight is 12lbs
    Asked on 3/24/2016 by Jon

    1 answer

    • Staff Reviewer

      A:

      The dimensions of this product are as follows: 11.2 x 11.2 x 10.5 inches.

      Answered on 3/24/2016 by Dennis from Atl
  • Electric Tankless Water Heater - 18 kW

    Q:

    Will this work in NYS where incoming village water is cold all year and colder in the winter? 1 person 1kitchen sink, 1 bathroom. Never in use at the same time. Thank you.
    Asked on 2/23/2016 by inquiringmind from Catskills, NY

    4 answers

    • VERIFIED BUYER

      A:

      Absolutely! We use it at our lake cottage in Northeast PA with a water
      system fed by underground streams. Always cold water and this does a great
      job. We have 2 bathrooms, one with a bathroom. We can run shower and
      kitchen faucet at the same time and it works very well.
      Good luck.

      Answered on 2/24/2016 by Anonymous
    • VERIFIED BUYER

      A:

      Yes
      Sent from my iPhone

      Answered on 2/24/2016 by Anonymous
    • Staff Reviewer

      A:

      In general, yes; but it will depend on the temperature of the water coming into the water heater. If the temperature coming in is too cold, thus lowering the GPM, it may not have enough flow rate to activate the pilot to heat the water. We recommend talking to a professional installer in your area to be certain that it will work before making this purchase.

      Answered on 2/25/2016 by Ray from Atlanta
    • Staff Reviewer

      A:

      Yes, the unit will work. But, it all depends on the temp. of the water coming into the unit. The higher the degree rise the lower your flow rate.If only one application is used at a time there should not be an issue

      Answered on 2/25/2016 by Taylor from Atlanta,GA
  • Electric Tankless Water Heater - 18 kW

    Q:

    Our cold water runs clear. When we use the Reem tankless water heater, the water runs yellowish orange. Will that go away? Do we need to flush the heater? It was installed about a month ago. Also, we were unable to find the serial number to register for warranty.
    Asked on 11/24/2015 by Tracey from Millmont PA

    1 answer

    • Staff Reviewer

      A:

      Please contact Rheem directly for tech support at 866-720-2076.

      Answered on 11/27/2015 by RS from Atlanta
  • Electric Tankless Water Heater - 18 kW

    Q:

    Has anyone put one in Florida? The guys that sell the tank models say it won't work in FL.
    Asked on 11/16/2015 by Chuck from Naples, FL

    1 answer

    • Staff Reviewer

      A:

      Location is not as much of a concern as flow rate is. An RTE 18 will supply hot water to a shower, but it wont be able to supply to anything else at the same time.

      Answered on 3/11/2016 by Taylor from Atlanta,GA
  • Electric Tankless Water Heater - 18 kW

    Q:

    what size would i need four a 2 bath 4 people house
    Asked on 11/13/2015 by neil

    1 answer

    • Staff Reviewer

      A:

      The RTE 28 would be recommended for applications where both showers would be used at the same time.

      Answered on 3/16/2016 by Taylor from Atlanta,GA
  • Electric Tankless Water Heater - 18 kW

    Q:

    How many peple can shower at the time
    Asked on 10/28/2015 by Ed from Frezer park

    1 answer

    • Staff Reviewer

      A:

      It all depends on the degree rise that the unit is needing to maintain. If the water during the winter is coming in at 50 degrees or so,the RTE-18 will be able to supply water to one shower

      Answered on 11/3/2015 by Taylor from Atlanta,GA
  • Electric Tankless Water Heater - 18 kW

    Q:

    what fittings needed to connect water line to unit
    Asked on 9/27/2015 by larry from mich.

    1 answer

    • Staff Reviewer

      A:

      This will need standard 1/2" water connection fittings.

      Answered on 9/28/2015 by Dennis from Atl
  • Electric Tankless Water Heater - 18 kW

    Q:

    If the unit requires 2/double breaker 40 amp and you have 2/double breaker 50 amps, can you run the unit on the double pole 50 amps without damaging the unit?
    Asked on 9/15/2015 by Vonniebell from United States

    1 answer

    • Staff Reviewer

      A:

      For technical support, we recommend contacting Rheem directly at 1-866-720-2076.

      Answered on 9/24/2015 by Ray from Atlanta
  • Electric Tankless Water Heater - 18 kW

    Q:

    what is maximum operating temperature? conversion rate?
    Asked on 9/4/2015 by David from Orlando, FL

    1 answer

    • Staff Reviewer

      A:

      105 degrees fahrenheit

      Answered on 4/8/2016 by RC from Atlanta
  • Electric Tankless Water Heater - 18 kW

    Q:

    I am looking at tankless elcctric w/heaters but do not know whay size i would need for 3/2 one store/ two adults.
    Please help
    Asked on 8/28/2015 by ror from ft myers fl.

    1 answer

    • Staff Reviewer

      A:

      You will need at least a 25 kw or bigger, just in case you are running a washer and trying to shower at the same time make sure you have a minimum flow of 5 gallons per minute flow rate.

      Answered on 9/4/2015 by Dennis from Atl
  • Electric Tankless Water Heater - 18 kW

    Q:

    Do u still have to run a T&P valve
    Asked on 8/27/2015 by Dan from Santa clarita

    1 answer

    • Staff Reviewer

      A:

      No valve kit is needed for the Rheem Electric Tankless Water Heater - 18 kW.

      Answered on 8/30/2015 by Dennis from Atl
  • Electric Tankless Water Heater - 18 kW

    Q:

    I have a kitchen sink & 1 bathroom with shower and sink with one person living there. What size Electric unit will i need?

    Thanks
    Denny
    Asked on 8/7/2015 by Denny from 54843

    1 answer

    • Staff Reviewer

      A:

      The Rheem Electric Tankless Water Heater - 18 kW will work with your application.

      Answered on 8/10/2015 by Dennis from Atl
  • Electric Tankless Water Heater - 18 kW

    Q:

    Thinking of using this type of water heater in one bdrm, 1 bath mobile home units (10) for elderly and/or disabled veterans. Would there be satisfactory hot water flow to handle shower, sinks, washing machine without the water running cold or just barely warm for the occupant? How would the cost of running the unit stack up against a regular water heater?
    Asked on 6/26/2015 by Ginny in Tn. from Cookeville, Tn.

    1 answer

    • Staff Reviewer

      A:

      The RTE 18 is on the low end for a unit to fit your needs. The unit will struggle in the winter, and on the further applications from the heater. It will run any single application by itself,but it will struggle to maintain the desired water temp once multiple things are run at the same time.

      Answered on 3/11/2016 by Taylor from Atlanta,GA
  • Electric Tankless Water Heater - 18 kW

    Q:

    Is one double throw 220 volt 40 amp breaker the same as two 40 amp breakers ?
    Asked on 5/9/2015 by Andy from Fresno ca

    1 answer

    • Staff Reviewer

      A:

      No, the double pole breaker is 40 amps but the two poles gives it the 220V. A single pole will only provide 110V.

      Answered on 6/1/2015 by Taylor from Atlanta,GA
  • Electric Tankless Water Heater - 18 kW

    Q:

    I'm starting my research for a Tankless Water Heater, I'm looking at Rheem since it is a recognized brand for a/cs. Looking at the RT-18, we have a 3 bedroom, 2.5 bath , 2 story townhome. Only 2 adults occupying, would the RT-18 be enough ?
    Asked on 5/7/2015 by Pat from Pembroke Pines, FL

    1 answer

    • Staff Reviewer

      A:

      With a 5gpm max flowrate given the best possible case in terms of water temp before the unit has to heat it, the RTE-18 is going to be a bare minimum in terms of KW.

      Answered on 5/7/2015 by Taylor from Atlanta,GA
  • Electric Tankless Water Heater - 18 kW

    Q:

    Do you sell parts for this heater? We installed one in February and are having trouble with it over heating and tripping the eco. The power keeps running after the water is turned off, and thought it might be the temperature control box.
    Asked on 12/9/2014 by Wayne

    1 answer

    • Staff Reviewer

      A:

      Please contact Rheem directly at 866-720-2076 for parts.

      Answered on 3/3/2015 by RS from Atlanta
  • Electric Tankless Water Heater - 18 kW

    Q:

    my home is a 2 bath and I have 4 b.r. Have 3 kids and 2 adults. what size is ok...
    Asked on 11/20/2014 by Harvey from United States

    1 answer

    • Staff Reviewer

      A:

      With 2 baths and 5 residents I would recommend nothing smaller than the RTE-18, a safe bet would be the RTE-27.

      Answered on 3/5/2015 by Taylor from Atlanta,GA
  • Electric Tankless Water Heater - 18 kW

    Q:

    Why don't someone state how many volts these units need? If these are placed under the sink, do we need to run 220 volts to our sink area, most of us only have 110 at the sink area. Don't understand why this info is not in the specs.
    Asked on 10/7/2014 by Sparky

    3 answers

    • A:

      You can tell voltage by number of breakers listed under specifications. Example 2/40 amp breakers implies 220volt. One breaker is 110volts.

      Answered on 12/7/2014 by notrocking from Pointblank, Tx
    • A:

      One would logically think that it is 240 volt as it states 2-40Amp What they forget to mention is that you need 2 40Amp double breakers. BIG difference!

      Answered on 4/1/2015 by Rich from Phila, PA
    • Staff Reviewer

      A:

      You can tell voltage by number of breakers listed under specifications. Example 2/40 amp breakers implies 220volt. One breaker is 110volts

      Answered on 4/3/2015 by Anonymous
Displaying questions 1-20

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Warranty

LIMITED WARRANTY
RHEEM® or RUUD® Residential Tankless Gas Water Heaters

GENERAL

This Limited Warranty is only available to the original owner of this water heater. It is not transferable. Rheem Manufacturing Company (Rheem) warrants this Rheem or Ruud water heater, and its component parts, to be free from defects in materials and workmanship, under normal use and service, for the Applicable Warranty Period. At its option, Rheem will repair or replace the defective water heater, or defective component part(s), in accordance with the terms of this Limited Warranty, if it fails in normal use and service during the Applicable Warranty Period. The replacement water heater must be manufactured by Rheem. The replacement component part(s) must be Rheem authorized component part(s). The replacement unit will be warranted only for the unexpired portion of the original unit's Applicable Warranty Period.

EFFECTIVE DATE

The Effective Date of warranty coverage (or the beginning of the Applicable Warranty Periods) is the date of installation of the water heater, if properly documented. Otherwise, it is the date of manufacture of the water heater plus ninety (90) days.

APPLICABLE WARRANTY PERIODS

The Applicable Warranty Periods are ten (10) years from the Effective Date for the heat exchanger and three (3) years from the Effective Date for the component parts if the water heater is installed in a single-family dwelling. If the water heater is installed anywhere other than a single-family dwelling or in any system in which the water is recirculated, the Applicable Warranty Periods will be limited to one (1) year from the Effective Date.

APPLICABLE WARRANTY PERIODS FOR PURCHASES AFTER 7/1/08 or a 53, 66, or 74 Model Rheem Tankless Water Heater

The Applicable Warranty Periods are twelve (12) years from the Effective Date for the heat exchanger and five (5) years from the Effective Date for the component parts if the water heater is installed in a single-family dwelling. If the water heater is installed anywhere other than a single-family dwelling or in any system in which the water is recirculated, the Applicable Warranty Periods will be limited to one (1) year from the Effective Date.

APPLICABLE WARRANTY PERIODS FOR PURCHASES BEFORE 7/1/08 or a 42 Model Rheem Tankless Water Heater

The Applicable Warranty Periods are twelve (12) years from the Effective Date for the heat exchanger and five (5) years from the Effective Date for the component parts if the water heater is installed in a single-family dwelling. If the water heater is installed anywhere other than a single-family dwelling or in any system in which the water is recirculated, the Applicable Warranty Periods will be limited to one (1) year from the Effective Date.

All Applicable Warranties will be limited to three (3) years from the Effective Date if the water heater is installed in a system in which the water is re-circulated, but not if its an on-demand re-circulation system which utilizes existing hot and cold water lines, or a dedicated return line without the use of a temperature sensor, timer, or a continuously operating pump

All Applicable Warranties will be limited to three (1) year from the effective date if the water heater is installed anwhere other than a single-family dwelling.

WARRANTY EXCLUSIONS

This Limited Warranty will not cover:

  1. Service trips to your home to teach you how to install, use, or maintain this water heater or to bring the water heater installation into compliance with local building codes and regulations.
  2. This residential tankless water heater if it is installed for use in: spa or pool heating; a mobile home; a recreational vehicle; a boat or any other watercraft.
  3. Units installed in any circulating system in which the temperature of the incoming water to the water heater is in excess of 120° F.
  4. Damages, malfunctions or failures resulting from failure to install the water heater in accordance with applicable building codes/ordinances or good plumbing and electrical trade practices.
  5. Damages, malfunctions or failures resulting from improper installation or failure to operate and maintain the unit in accordance with the manufacturer's instructions provided, including outside of recommended water quality levels as listed in the chart below:
  6. Performance problems caused by improper sizing of the water heater or the gas supply line, the venting connection, combustion air openings, electric service voltage, wiring, or fusing.
  7. Damages, malfunctions or failures caused by improper conversion from natural gas to LP gas or LP gas to natural gas fuel source.
  8. Damages, malfunctions or failures caused by operating the water heater with any parts removed or with modified, altered, or unapproved parts installed.
  9. Damages, malfunctions or failures caused by abuse, accident, fire, flood, freeze, lightning, acts of God and the like.
  10. Heat exchanger failures (leaks) caused by operating the water heater in a corrosive or contaminated atmosphere or damages, malfunctions or failures caused by lime or mineral build-up.
  11. Damages, malfunctions or failures caused by operating the unit at water temperatures exceeding the maximum setting of the operating, or high limit, control.
  12. Heat exchanger failures caused by operating the water heater when it is not supplied with potable water.
  13. Damages, malfunctions or failures caused by subjecting the heat exchanger to pressures, or firing rates, greater than those shown on the rating label.
  14. Damages, malfunctions or failures resulting from the use of any attachment, including any energy saving device, not authorized by Rheem.
  15. Units installed outside the fifty states (and the District of Columbia) of the United States of America and the Dominion of Canada.
  16. Units removed from the original installation location and reinstalled elsewhere.
  17. Units that have had their rating labels altered, tampered with, or removed. A water heater should not be operated if the rating label is removed.

LABOR, SHIPPING, AND PROCESSING COSTS

This Limited Warranty does not cover any labor expenses for service, repairs, reinstallation, permits, or removal and disposal of the failed water heater, or defective component part(s). All such expenses are your responsibility. Rheem will pay the transportation costs for an “in-warranty” replacement water heater, or “in-warranty” replacement component part(s), to a convenient delivery point (selected by Rheem) near the place the original water heater, or original component part(s), is located: such as a local Rheem or Ruud water heater distributor.You must pay any local freight charges, including the cost of returning the failed water heater, or defective component part(s) to a convenient shipping location (selected by Rheem): such as a local Rheem or Ruud water heater distributor. Rheem does not authorize, recommend, or receive any benefit from any claims processing or similar fees charged by others to process warranty claims for any Rheem or Ruud water heater or component part(s). Rheem will not reimburse any party for these, or any other, fees not specifically covered in this Limited Warranty document.

HOW TO OBTAIN WARRANTY CLAIM ASSISTANCE

Any claim for warranty assistance must be made promptly. First, determine if your water heater is “in-warranty” (that is, within the Applicable Warranty Period).You can determine your unit's warranty status by adding its Applicable Warranty Period to its date of installation. However, if you do not have documentary proof of your water heater's date of installation, your unit's warranty status will be based on its date of manufacture. The first four digits of the unit's serial number represent the month and year it was manufactured. Add the Applicable Warranty Period plus ninety (90) days to the date of manufacture to determine whether the water heater is still covered by this Limited Warranty.You may also determine your unit's warranty status by obtaining the complete model number, complete serial number, and date of installation of your water heater and then accessing the “Warranty Verification” information on Rheem Water Heaters' internet website (www.rheem.com) or contacting Rheem Water Heaters' Claims Department (telephone (800) 621-5622) during normal business hours (in the Central Time Zone) to determine if the Applicable Warranty Period has expired. If your water heater is “in-warranty”, contact the plumber, or mechanical contractor, that installed it for assistance with the warranty repairs, or replacement, required.You may also select a plumber, or mechanical contractor, from your local Yellow Pages to assist you. Rheem Water Heaters' Technical Service personnel are available to assist you (by telephone at (800) 432-8373 or via e-mail at techserv@rheem.com) in obtaining “in-warranty” service or to answer your questions about the operation or repair of your water heater during normal business hours (in the Central Time Zone). Be prepared to provide the plumber, mechanical contractor, or Rheem Technical Service person you call with the complete model number, the complete serial number, and the date of installation of your water heater in addition to an explanation of your water heater problem. If an exact replacement is not available, Rheem will provide you with the current model of your water heater, or component part(s), or a replacement unit with comparable operating features. If government regulations or industry certification or similar standards require the replacement water heater, or replacement component part(s), to have features not found in the defective water heater, or the defective component part(s), you will be charged for the difference in price represented by those required features. If you pay the price difference for those required features and/or to upgrade the size and/or other features available on a replacement new water heater, you will also receive a complete new Limited Warranty (with the full Applicable Warranty Periods) for the replacement new water heater. Rheem reserves the right to inspect, or require the return of, the failed water heater or the defective component part(s). Each “in-warranty” failure water heater must be made available to Rheem (with the rating label and all the component parts intact) in exchange for the replacement water heater. Each defective “in-warranty” component part to be replaced must be returned to Rheem in exchange for the replacement component part. Warranty compensation is subject to validation of “in-warranty” coverage by Rheem Claims Department personnel.

  • To obtain warranty compensation for an “in-warranty” water heater failure, you must provide Rheem with: (at Rheem's option) either the failed water heater (with the rating label and all the component parts intact) or the complete original rating label (photocopies are not acceptable) removed from the failed water heater; the complete model number and the complete serial number of the Rheem or Ruud water heater that replaced the failed unit; and the date the original water heater failed.You may also be required to provide documentary proof of the failed water heater's date of installation to establish its “in-warranty” status.
  • To receive warranty compensation for an “in-warranty” defective component part, you must provide Rheem with: the defective component part; the complete model number and the complete serial number of the Rheem or Ruud water heater from which the defective component part was removed; and the date the defective component part failed.You may also be required to provide documentary proof of the date of installation of the Rheem or Ruud water heater from which the defective part was removed — or the date of purchase of the part (if it was purchased separately) — to establish the “in-warranty” status of the defective component part.
Warranty claim documentation should be mailed promptly to
Rheem Water Heaters, Claims Department
2600 Gunter Park Drive East
Montgomery, Alabama 36109