Free Shipping and No Hassle Returns
Free Shipping
We offer free shipping on orders over $199.*
No Hassle Returns
Don’t like it? Send it back. It’s that simple.*
Same Day Shipping
Most orders ship same day if placed by 5PM EST (M-F)
*Restrictions Apply. See Details »
Model#: RHMNRTE-3
Condition:
New

What are the different product conditions?

New
Brand new items;Full manufacturer warranty available
Reconditioned
Manufacturer inspected, repaired and tested items; CPO 60 day money back guarantee
Open Box
New or Recon items with possible minor cosmetic damage; CPO 60 day money back guarantee
Certified
Returned items inspected, repaired and tested by CPO technicians; CPO 60 day money back guarantee

Rheem RTE-3 Electric Tankless Water Heater - 3 kW

  • Rheem RTE-3 Electric Tankless Water Heater - 3 kW
List:
$219.99
Sale Price:
$169.99
You Save
23%
Qty:
-
+
In Stock
Ships Tomorrow

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 1.5 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:
  • 3 kW Electric Tankless Water Heater - RTE-3

Specifications

Weight: 6 lbs.
Activation Flow: 0.40 GPM
Amperage: 29
Application: Point-Of-Use
Kilowatts: 3
Required Breaker: 30 Amp
Water Connection: 1/2 in. NPT
Wire Size: 10 Gauge

Recommendations

Reviews

4.0 / 5.0
5 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
3
1
0
0
1
Would you recommend?
Yes (4)
No (1)
Pros
Easy To Use (3)
Recommendations
No, I would not recommend this to a friend
Does not heat cold water !
This product will only heat already warm water. If you don't live somewhere warm this product is not for you. The colder your water intake is the worse this product will seem. Manufacturer claims it will raise temps 50 degrees but my water went from 52 to 68 . Horrible Product . The people that make it know it but don't advertise it.
December 5, 2013
Recommendations
Yes, I would recommend this to a friend
Pros
Easy To Use
Haven`t instaalled it yet.
I tried to find a way to contact someone about seeing illustration pictures on exactly how to install the plumbing. Ounce I finaly get it installed I think that it will work perfect in my man/cave bathroom.
June 15, 2015
Recommendations
Yes, I would recommend this to a friend
Pros
Easy To Use
OMG It's a lil guy not a whole heater replacement!
A couple things about all tankless units. You will notice that the flow rates are all listed as "Max" flow rate. It took a lot of digging to realize what it was trying to convey. They only heat water 30 to 50 beyond the starting temp & only use less than the max gpm flow. Exceed it, & only get 15* or less.

if you stay at 40-75% flow capacity (use the avg. high for the 3 coldest months of the year as the percentage) So if you have an average high temp of 42* then you will only have 42% of the flow capacity because the other portion is needed to bring the temperature up to the correct temp. Yes, they are expensive when you do it this way, but you will be happy with the end result.

So this little guy is good for a powder bath that we wanted to install in a basement powder bathroom, normal water lines were not anywhere close to it so by installing this one we were able to run just cold water to the sink split at the heater and feed both hot and cold to the faucet with a spray faucet that puts out 1 gpm. Don't know how much your different items put out? Take a bucket and have someone else tell you to turn on the faucet, and tell you when 60 seconds are up. Measure the liquid that is your gpm. divide by the percentage based on avg. high temp (3 coldest months) and that's how much you need to properly heat the water. the 1.5 gpm was a little close (her avg. high was 70) but mom is very happy with the water temp and said since it's right there she doesn't need to turn on the water and wait a few minutes for it to come out hot, it just is. All of these are hard wired and need a dedicated circuit, so be prepared to call an electrician

This unit I would recommend PROVISIONALLY because it's flow rate is very minimal it has very limited applications where it would be cost effective.
August 16, 2016
Recommendations
Yes, I would recommend this to a friend
Not what I expected
I should have researched this better before I ordered as I thought it would be something that I could plug in under the kitchen sink. When I realized it would have to be professionally installed I decided to return it. I had no problems returning the unit and was issued a credit within a week. I will definitely be a return customer if the need arises and will refer others to CPO in the future.
February 26, 2013
Recommendations
Yes, I would recommend this to a friend
Pros
Easy To Use
1,5 or less flow rates
Flow rate mistakes-- These low flow rates in hand sinks are common, 1.1 gallon kitchen sinks, require a "green" spray head, which we already used. Hot water for dish- clothes washers are not what these 30 amp units are designed for. For example, filling a tub for a bath, at a 1 gallon a minute rate would take 30 minutes.
May 10, 2016

Questions & Answers

Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 22 questions Browse 22 questions and 31 answers
Will this have the same capacity as a water heater with a 30 gallon tank?
Steve on Sep 18, 2015
BEST ANSWER: TANKLESS WATER HEATERS HAVE UNLIMITED CAPACITY - AS IN THE NAME IT DOESNT STORE HOT WATER - IT HEATS IT ON DEMAND AND TURNS OFF WHEN YOU TURN HOT WATER OFF , SAVES A LOT ON ENERGY BY NOT HEATING WATER TO BE STORED
Would this work for a camper shower?
Troy on Jul 17, 2016
BEST ANSWER: Yes, the heater can be used with a camper shower.
Would this work to feed a shower??
Matt on Jan 27, 2016
BEST ANSWER: No, the RTE-3 does not supply enough flow rate with a reasonable degree rise for a shower
Does this tank supply the whole house?
ty on Jul 1, 2015
BEST ANSWER: THEIR ARE SEVERAL TYPES OF TANKLESS HEATERS - SOME ARE POINT OF USE SOME ARE WHOLE HOME - I AM A BACHELOR SO I HAVE USED AT POINT TYPES FOR MY LITTLE HOUSE , IT SERVES ME WELL -FOR A LOT LESS THAN A 25 GALLON GAS WATER HEATER - IF YOU HAVE A VERY BIG HOUSE OR USE A LOT OF HOT WATER YOU WOULD DO WELL BY PURCHASING A LARGER WHOLE HOUSE TYPE
1 What is the size of unit.
2 What is the max hot setting
Mr k on May 23, 2015
BEST ANSWER: The dimensions are 10-1/4 inches long x 5-3/8 inches wide x 7 inches high. The Max hot setting will push the water temp to 145 degrees, but will lower your flow rate a good bit
Does it plug into a regular outlet or do I have to call a electrician.
Vanessa on Dec 8, 2014
BEST ANSWER: You will need to call a professional electrician. 10 gauge wire with 30 amp breaker required (see description), most houses have 14 gauge wire for basic wiring with 15 amp breakers. With water and electricity in the kitchen, get a GFI.
What are the dimensions of the RTE 3 and RTE 7 units?
Bob on Oct 19, 2014
BEST ANSWER: Both models have the same dimensions. The height of the units is 10-1/4'', the width 5-3/8'', and the depth 3-1/4''.
120 0r 240 ?
Rick on Oct 12, 2014
BEST ANSWER: The Rheem Electric Tankless Water Heater - 3 kW requires a 110V breaker.
What are the dimensions of the RHMNRTE-3. How much wall space does it need?
Lou on Jul 30, 2016
BEST ANSWER: Product Dimensions 5.4 x 5.4 x 10.2 inches
Is the jury still out in this hot water side supply ? I wait too long for hot also and am ready to try this for a solution.
Simple man on Jul 17, 2016
BEST ANSWER: For help with this question, please contact Rheems technical support at 800-714-9833
Can I fill a spa tub at a flow rate that will keep the standing water temp at 115 degrees by the time that the tub is full?
Brent on Mar 11, 2016
BEST ANSWER: For help with this question, please contact Rheems technical support at 800-714-9833
Is this 220 volt or 110 volt
Bob on Jan 26, 2016
BEST ANSWER: The Rheem RTE-3 is 110V
Can you take a shower with this heater
terry malim on Jan 12, 2016
BEST ANSWER: This unit will not provide enough water for a shower.
Will this unit provide as much hot water as a 6 gallon tank water heater?
Doug on Oct 27, 2015
BEST ANSWER: The RTE is a 3KW point of use unit, so for a single application, and located near said application, it will provide hot water to the sink for as long as you leave it on. But, this unit has a very limited flow rate, so it cannot be used for much more than a sink
Will this unit provide enough hot water for a kitchen sink?
Doug on Oct 27, 2015
BEST ANSWER: Yes, it will work for that single application alone
Can the inlet water be turned off without damaging the Electric Tankless Water Heater?
JD on Sep 30, 2015
BEST ANSWER: Please contact the manufacturer direct at 1-866-720-2076 for technical assistance.
Will this unit work for a shower ? Uncleskid01@gmail.com
cbender on Feb 19, 2015
BEST ANSWER: That unit will not work for a shower.
can antifreeze run through this unit
Rich on Feb 16, 2015
BEST ANSWER: No, it is not recommended to run antifreeze through this water heater.
Overall dimensions? How thick is it? Can it be installed face flush inside a 4" deep wall.
How much rear/side clearance is needed for heat generated?
DogWood on Jan 2, 2015
BEST ANSWER: Here are the dimensions of the rte-3:

The height of the unit is 10-1/4, the width 5-3/8, and the depth 3-1/4

You can definitely install it inside a 4" wall since the depth is 3-1/4 there will be some space but if you pull it out a bit you can put it flush. Clearance for this item is actually needed on the top and bottom at 12-in on each side.
Assuming my water temp is 65 degrees and my max water flow is 1 gal per min. What would the water temp be using this unit?
trish on Sep 23, 2014
BEST ANSWER: This model can only do a 30 degree rise, so the max you would see with a ground temp of 65, is 95 degrees
what is the height an width of this unit
thank you
Jerry on Sep 2, 2014
BEST ANSWER: 5.4 x 5.4 x 10.2in
Can this heater be installed in hot water line? Does it allow hot water in and out to assist in circumstances where it take hot water too long to get?
KK
KK on Jul 27, 2013
BEST ANSWER: According to the manual the intake water line should be cold.

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