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-27
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-27 Electric Tankless Water Heater - 27 kW

List:
$799.99
Sale Price:
$699.99
You Save
12%
Free Shipping
(continental U.S.)
+
Qty:
-
+
In Stock
Ships Monday

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:
  • 27 kW Electric Tankless Water Heater - RTE-27

Specifications

Weight: 12 lbs.
Activation Flow: 0.40 GPM
Amperage: 112
Application: Point-Of-Use
Kilowatts: 27
Required Breaker: (2) 60 Amp
Water Connection: 1/2 in. NPT
Wire Size: (2) 8 Gauge

Recommendations

Reviews

5.0 / 5.0
4 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
4
0
0
0
0
Would you recommend?
Yes (4)
Recommendations
Yes, I would recommend this to a friend
So Far..So Good !
This unit replaces a "Bosch" unit which failed twice. Your unit was a MUCH
easier install by the electrician and plumber, So far its working fine (about a month).
March 21, 2012
Recommendations
Yes, I would recommend this to a friend
works great
Worked great until it malfunctioned but 2 days after I called CPO , I had a new one at my door. Awesome to work with and Rheem stands by there product.
December 14, 2012
Recommendations
Yes, I would recommend this to a friend
best thing I ever did to go green
installed it myself , no more leaky tanks and much lower cost can now take long hot showers and never run out and it so small it can be mounted under the sink mine has worked for 2 years with no problems so I just bought another for my neighbor !
June 12, 2015
Recommendations
Yes, I would recommend this to a friend
So Far ..So Good !
Seems to be a good product, too soon to tell
April 10, 2012

Questions & Answers

Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 30 questions Browse 30 questions and 41 answers
I have a 35 FT Camper we are wanting to live in full time we live IN South Carolina so In winter gets to about 10 degrees worse case I am just looking for a unit to run my Shower I will be on a 30 AMP Campground site
Arlen on Jun 14, 2016
BEST ANSWER: After all my research on this unit you have two problems trying to put this in a camper:
1) this unit requires a (2) 60 amp breaker requirement which would blow your 30 amp site every time you turned it on
2) this unit only pushes 0.40 gallons per minute. A normal shower ranges from 2 gpm up to 5 gpm depending on your plumbing.
I would NOT recommend using this unit. You may be stuck with a tank style heater due to your 30 amp camp site hook up. Double check your site amperage and check all your specs on the units you are looking at.
Also check your plumbing as well. It may be very hard to adapt a residential heater in to an RV setup.
Good luck!
Jamison
JMA Construction INC
I have a 3000 square foot home with three full baths, kitchen, dishwasher, laundry etc.

What sixe heater would I need?

If we had a full house with high load, would it keep up?
Tom on May 31, 2016
BEST ANSWER: This unit will handle a constant 3.5 gallons a min. So if your running two showers at the same time just be sure to choke the shower heads down to 1.75gpm to be on the safe side. Just shop around and find the shower heads that are 1.75. I found mine at Lowes. Made by Oxygenics. They keep up. But if your going to run more than two showers at once. Then it will not keep up. As long as your not washing cloths, dishes and running two or more showers you will be fine. But 1 shower and the other things would be ok. Just make sure to install it with the correct wire and breaker to get maximum efficiency
Can this be installed in a hot water line to provide heated water until the warm water from the main heater arrives at the installed location? Currently we need to run the water for nearly a minute until the hot stuff shows up.
Chilly in CA on Aug 27, 2013
BEST ANSWER: So I called Rheem the unit can have a temp of 100 degree max of water delivered to the cold side safely then this unit will bump it up to 120 or higher. I am taking the water heated by the oil burner then pumping it to this unit during the winter. In the summer it will have normal water temp delivered and it will heat to 120 deg.
Can the RET 27 be used for heating water for the entire house?
Lupe on Feb 8, 2013
BEST ANSWER: I disagree it is a whole house water heater, the difference is there is no tank you have to keep heating. This unit is rated for a house with two showers/tubs so I would say yes it does heat the whole house
I hooked it up and it keeps blowing breakers. I used 6 gauge black to black white to white. Copper ground on all wires 2 double 60 amp breakers. I turn the main on and it blows both breakers. Î disconnect the wires so they are not connected to the box. Turn the main on and they don't trip. Tried another smaller unit rte18 with only one 240 breaker âdd it does the same. Don't understand why since it is both units and even the large one I hook only õver of the 240 it trips. Either ;reaker wire one it does. What am I doing wrong since the breakers don't trip when the wiring isn't connected to the box. Thanks tim
Tim on Apr 12, 2016
BEST ANSWER: Tim,
These run a constant 50-55 amps when on. So a 60 amp breaker is not enough. You have to use 2-70 amp breakers to hold
The load at the minimum. Breakers are designed to carry 80% of their capacity for a sustained amount of time. So 2-60's is not enough. What size is your service? If it's not a 200amp panel it will not work. Even with a 200amp panel you will have to be careful not to run the dryer or a/c unit or electric Oven if
You have one. Otherwise it will blow the main. Those two 70amp breakers will have to be ordered from an electrical outlet store the Box stores don't carry them. This Rte27 runs a constant 100-115 amps when it's turned on. If you have any more questions please call or text me***.****
Our hot water tank gets a really bad lime scale buildup on the elements. Will this tankless unit cause the same problems?
Vic on Nov 28, 2015
BEST ANSWER: Yes, any tankless will suffer from build up if you are running "hard" water
if i have a hot tub,can i fill the tub with all the hot water it need to fill it.
johnny t on Feb 25, 2015
BEST ANSWER: Yes, you can fill the tub with all the hot water.
I work at the convention center and I am looking to replace hot water heater, my bathroom average 12 sinks with a water of .50 gpm. Please let me know if this will work for me or suggest different models please.

Beverly Watson
bjwatson@lacclink.com
BEST ANSWER: The RTE 27 will supply hot water to a max of 10 sinks running at the same time.
Would this unit be sufficient to replace 2 50Gal gas water heaters in a 2,600 sq ft home with 2 baths?
Built2Serve on Jun 15, 2016
BEST ANSWER: This unit is too small to cover your whole house. Please contact CPO sales team for more information.
I have one bathroom, one washer "he" and no dish washer. One person living in the house. How big of a unit do I need?
Mike on May 29, 2016
BEST ANSWER: If your residence is located in NY like the question states, then no smaller than the RTE-18. This unit will provide hot water to a single application no questions asked during the cold winters
Is this good for a family of 4 with 2 bathrooms?
Toni on May 7, 2016
BEST ANSWER: Yes, but only for the bathrooms. We recommend a separate unit for your kitchen and Washer machine.
I have a customer with a split system in their house. A larger water heater runs the kitchen,1/2 bath, dishwasher, and laundry. A smaller unit runs two more bathrooms. Would the RTE 27 unit replace the larger water heater and would an RTE 18 be sufficient to run the two smaller bathrooms on the small existing water heater? Thank you
JMACI on Apr 22, 2016
BEST ANSWER: Please contact Cpo Sales team
I understand this heater requires a 60 amp 2 pole breaker but what gauge wire should be used and is is disconnect required?
Ken on Mar 14, 2016
BEST ANSWER: This unit requires 8 gauge wire.
I have a condo with 1& 1/2 baths and washer dryer, dishwasher. What unit would you recomend. Has to be electric
stumpjumper on Feb 24, 2016
BEST ANSWER: Nothing smaller than the RTE18 should be used for your application
Will this supply enough flow for a two bath house with a dishwasher and washing machine? If so what can I run at the same time?
Roy on Jan 17, 2016
BEST ANSWER: The RTE 27 is rated at a 5GPM max. As soon as the degree rise is increased the flow rate will drop. A shower averages about 2GPM, so you are cutting the capacity nearly in half just by using a single shower. You could operate both showers at a time, or a combination of a shower and a single appliance
How well does this unit work in sub zero climates on a well system.
My home has a electric tank system now
My home is a mobile home (park style) with skirting and the tank is located under the home
And temps get below zero here in Minnesota and it would be nice to have almost endless hot water.
It would be supplying a kitchen, laundry and 1 bathroom
And I do like the temp to be about 125 degrees
Cold water on Jan 10, 2016
BEST ANSWER: A 27 KW system would be needed to achieve the temp. you desire at the flow rate given.
Will l need a expansion tank for unit . Now have one for my 40 gallon I am in Chatham not must space condo. Thanks Mark
Mahk on Dec 19, 2015
BEST ANSWER: Expansion tanks on tankless units are installed per code. If your local code requires one, then the specified size would need to be installed.
I would like to install inside a closet. How much actual space is needed including the water hook ups?
Also is it able to turn sideways so that the hook ups can be on top and bottom?
Kathy on Oct 30, 2015
BEST ANSWER: The product dimensions are: 11.2 x 11.2 x 10.5 inches
I have 150 amp panel with 100 amp sub panel will this work on just a 150 amp service coming into my household
chuck on Oct 25, 2015
BEST ANSWER: It will work, but the unit alone demands 120amps, or a double pole 60 in the box. If you have the room then there should not be an issue
Can this unit heat water for 3 baths ? And how many showers and you run at the same time ?
Pedro on Oct 15, 2015
BEST ANSWER: The RTE 27 has a maximum of 5 GPM, which would do two showers at the same time, given the degree rise would be very little.
We are building a garage that will have a bathroom and shower. Will this unit deliver enough GPM for a shower or is this just for under the sink?

Also we are on well water by the Trinity River. The water goes through filtration however there is still iron in it. How would that affect the lines?
Rachel on Oct 5, 2015
BEST ANSWER: The RTE27 can supply enough flow rate for a shower. The Iron rich water will just cause the tankless unit to need to be flushed more often.
Does this provide enough hot water for a 2 bathroom house? If not what should I be looking for.
Sara on Sep 28, 2015
BEST ANSWER: Yes, the RTE 27 provides enough GPM flowrate for a 2 bathroom house.
Can this product be installed in the basement and still provide hot water for the shower two stories upstairs?
Garrick on Sep 21, 2015
BEST ANSWER: Yes, the RTE 27 can provide hot water to a single shower two stories higher
Will this particular unit serve the whole house?? 2 .5 bathroom home??
Chris on Sep 14, 2015
BEST ANSWER: Yes, the RTE-27 can supply hot water for a 2.5 bathroom home in your location
We naturally have very cold water from a well how hot will this get the water. we prefer 125 degrees
ba on Apr 26, 2015
BEST ANSWER: The unit can heat the water to whatever your desired temp is, but the harder the unit has to work to reach that temp, the lower your flow rate will be
I would like a unit that will supply a one bathroom one kitchen house, I have Plummer that is recommending a unit that cost $1400 , but I see units that are $600-$700. Ii don't know what is the best option.
John on Oct 26, 2014
BEST ANSWER: You would be best off by contacting the manufacturer directly to discuss those terms with them. You can reach Rheem directly at 866-720-2076
how far from the point of use area can the heater be located and what voltage are the heaters
Dale on Sep 11, 2014
BEST ANSWER: It is best to keep within a 3-4 foot distance.The voltage is 220 volt.
What is the size of the unit. Length,width, and thickness.

ThankYou
Tony on May 4, 2014
BEST ANSWER: The dimensions for the heater are 11.2 x 11.2 x 10.5 inches.
How hot does the water get
Buck on Mar 13, 2014
BEST ANSWER: If you go to Rheem's website the selection guide with assist you.
Here is the link:
http://www.rheem.com/products/tankless_water_heaters/tankless_electric
are these use for all hot water outlets?
rick the fix it on Sep 29, 2012
BEST ANSWER: Yes, it can be used in nearly every residential and many commercial hot water applications.

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