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Model#: RHMNRTE-13

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Rheem RTE-13 Electric Tankless Water Heater - 13 kW

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(continental U.S.)
This item is no longer available.
It has been replaced by the RHMNRTEX13.

Product Overview

Additional Information


Continuous, on demand, hot water and a compact design means this Electric Tankless Water Heater is perfect for point-of-use applications.
  • Can heat a maximum of 4 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
  • 13 kW Electric Tankless Water Heater - RTE-13


Weight: 8 lbs.
Activation Flow: 0.40 GPM
Amperage: 54
Application: Point-Of-Use
Kilowatts: 13
Required Breaker: 60 Amp
Water Connection: 1/2 in. NPT
Wire Size: 6 Gauge



4.5 / 5.0
59 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Stars
Yes, I would recommend this to a friend (53)
No, I would not recommend this to a friend (3)
Yes, I would recommend this to a friend
The real deal!!
I took out my old 50 gallon water heater because it was in a bedroom closet and i was afraid it would bust someday and ruin my floors and furniture. I live alone in a small 2 bedroom home and the water fixtures (bathroom and kitchen) are close by where the water heater was located. Once I installed this Rheem 13, it more than puts out the heat I need for showering, dishes, and sink needs. I have only had it a week and am oversatisfied!

I installed it myself and have intermediate handyman skills. The plumbing ($20) was pretty easy but electrical was a challenge. Upgrading the breaker to a 220v 60amp breaker ($9) and running new 6/2 wire ($51) was difficult as it much larger wire that the 10 gauge previously used on my old water heater. It was hard to drop it down into my fuse panel.

So in total, it cost me about $260 and I have so much more room in my closet and don't fear coming into a lake at my house. Every install will have different hurdles but the savings in the long run will pay for your troubles up front. I'm not sure if this would work in a large home with a lot of hot water demanded by different outputs at once. It seems like a tough appliance and i have yet to challenge it's capabilities.
September 17, 2014
Excellent Performance, Not Build Quality
This review is regarding the Rheem company, not CPO. So far, CPO's shipping has been fast, and their service respectable. I trust it will continue in that manner and I do recommend them.

As far as the unit is concerned...

I finished installing it today. The green standby light turned on when the breaker was switched as it was supposed to. It was properly installed and the air was bled prior to connecting the power. The unit performed marvelously.

I purchased the Rheem RTE-13 as a replacement for the bug-ridden Bosch AE-12 tankless water heater. The Rheem is priced the same as the Bosch and offers a more generous heat output. It is also a top seller across the board and has received generally positive reviews.

I had satisfactory water temperatures coming from the tap while the thermostat was set at "medium". A shower was pleasant and the temperature remained consistent throughout.

Just a few minutes later, however, the unit quit. The green standby light went off and the unit performed as though it had never worked out of the box. No leaks, no electrical issues--just a failure to operate as designed.

Before buying, I did thorough research to discern what unit was best for my circumstances: two sinks and a shower in a cold, northern climate. It seems this unit is a perfect fit. It provides the most hot water for the price (4.0 GPM) as far as I can tell.

But, as other reviews have stated, it is possible you may be returning the first (and possibly second) unit you buy. The build quality simply must be lacking.

Having a small cabin with no floor space for a standard tank hot water heater, this SHOULD be a perfect fit for me. The compact size (fits under any sink) and high heat ouput make for an attractive water heater.

I will be sending this unit back to obtain a replacement. Please be advised that if you install the unit, you must obtain a case number from Rheem before returning it to CPO. I hope that I am not hassled by Rheem.

I hope this proves to be an unbiased review. I have not had hot water in my house for over a week and it looks like I'll be going another week just the same, so I'm attempting to not be spiteful; I still think the unit is impressive and would prove useful if not for the tendency to fail.
August 20, 2013
Rheem RTE13
Love it. Easy to install and can be used in series if needed. Make sure you use correct ga. elec. wire and heavy amp breakers. Use 3 ft of copper pipe downside of hot water flow before going to PEX. Saves lots on elec. bill.
August 21, 2011
Yes, I would recommend this to a friend
1.5 gal. / min. realistic w/55 degree gw
Electrical service may need to be upgraded, requires a 60 amp 220 breaker and 6 guage wire. Uses compression fittings for half inch copper pipe. Do not confuse this with copper tubing, which is not the same outside diameter. If you are connecting to any type of plastic pipe, including pex, the copper pipe must exstend three feet on each side of the unit and a pressure relief valve must be installed. It would be a good idea to install flow restricting airators an all taps to insure even hot water flow. Also a low flow shower head should be installed. Even with all those requirements the unit is the most economical unit I have seen for moderate to low use environment.
February 10, 2015
Yes, I would recommend this to a friend
really more than i expected
i never run out of hot water and it is really quick to be hot
September 21, 2014
Yes, I would recommend this to a friend
(skeptical not anymore)
i use this product for all my applications, dishwasher,washing machine.sinks,and best of all my shower.never runs out of hot very energy efficeint,does not use any power unless hot water is on, very quick and easy to install,temperature control at finger tips,mount on wall and any leaks that may occur (way less places for that to happen) can be easily and quickly detected before your floors are rotted away. will never buy another tank product again,this product cost me less than half what a tank would cost me.(skeptical yes i was but not anymore)
July 20, 2015
Yes, I would recommend this to a friend
I would buy this product again.
Purchased for my garage. I wanted something that would not be on all the time, wasting energy. Easy to install. It takes a couple of minutes to warm up, but water will get very hot if thermostate is turned all the way up. My son took a shower with it and he said water stayed hot the whole time. The only con I would say is the tubing fitting. I think it would have been easier if it had pipe fittings.
October 13, 2015
Yes, I would recommend this to a friend
I'm cautiously optimistic. The unit wasn't very reliable out of the box. IT worked for a day and then wouldn't turn on at all when the hot water was turned on. I investigated and found that the flow sensor switch was not ideally positioned - it was located too far away from the magnetic plunger to reliably engage and activate the heating circuit. I poured over the few documents available online, contacted CPO and Rheem and they were unfortunately of little help other than - "we'll replace it for you". I wanted to know why it failed. From the documents, there appear to be different versions of mounting hole locations for the flow sensor switch. I tried repositioning it with the other hole on the switch board and it worked fine. I contacted Rheem to see if this was acceptable or would void the warranty. Their tech tried to be helpful but couldn't tell me. He basically said," I don't know since I'm looking at the same photos you are." I asked if he could communicate with the design engineer. He said that he didn't have access to those individuals - NOT VERY CONFIDENCE INSPIRING. In any case, the new position worked fine for a day or two but then started intermittently turning on the heat for a brief moment when the hot water was not turned on - NOT GOOD. I then drilled a new hole between the two existing holes on the switch mounting board and repositioned it. It has been working fine since (3 weeks).
As to performance, understand that you can take showers with it even with cold inlet water temperatures ( I live in New England). But that is at the limit of its capacity. You might need to throttle back flow volume to get a "hot" shower - otherwise it can be luke warm when inlet water temperature is as icy as it is here.

I would say that this product is recommended with one important reservation - as long as Rheem and CPO are willing to stand by their product which they appear to be. If they are willing to warranty a defective product for the full 10 years - not just the heat exchanger part - then this is a no brainer. You will not find a better value or more intelligent choice when it comes to providing hot water for a small home. IT IS THAT GOOD!
Yes, I would recommend this to a friend
Outstanding preformance!!!!!!!!
This is the best Hot Water Heater purchase I have EVER made.
January 27, 2012
Yes, I would recommend this to a friend
Heater energizes everytime well pump run
I highly recommend the 13 kW Electric Tankless Water Heater - RTE-13 unit. Even with two showers running simultaneously and 58 degree well water we never run out of hot water.

Just one problem encountered: The Heater energizes every time the well pump runs (pressure cycles). This was due to too much air trapped in the highest section of the hot water line or because the flow sensor is too sensitive. Good News: this problem is easily resolved by purging the air from the hot water line and some of the air from the water hammer surge protection device.

We really appreciate never running out of hot water!
September 2, 2012

Questions & Answers

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Browse 91 questions Browse 91 questions and 202 answers
We want hot water in our wash stall at the barn to rinse or wash off horses. Will this unit work for that? We have well water that gives us approx. 4 gallons per minute. May be used up to 4 times a day but not always.
sissy on Feb 17, 2016
BEST ANSWER: I have personally found that "on demand" water heaters are a great
invention. However, it's very important to "size" them correctly. Size is
based on how much "heating" is required to raise the water temperature to
whatever heat level you desire from the temperature as it arrives in the
heater. We have two on demand water heaters - an 18kW and this one 13kW.
We live in Arkansas which has relatively mild winters and the 18kW rocks
the kitchen, the dishwasher and one bathroom, but the 13 struggles during
cold weather to heat the water for our washing machine (works fine for the
bathroom spigots), and actually requires turning the cold water completely
off, then turning the hot water down to about half speed so the unit has
the time it needs to raise the temperature of the water.
I hardily recommend "on demand" water heaters, but I would consult a
professional as to what size will work for your circumstances - I obviously
should have. Good luck!
What all can it handle? Washer, shower, dish washer ?
Raven on Aug 4, 2016
BEST ANSWER: Raven the water heater will handle all the things you mentioned, but only one at a time.  When you are in the shower, if someone else turns on the water you will get a cold shower until they turn water off.  If you have any other questions I will happy to answer them.
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Can this item be used in an old trailer house
tammie on Jul 11, 2016
BEST ANSWER: Only if it has a 100 amp w/220 volt service box. Check the cover on your
electrical box (it should have a stamped plate that will tell you). If it's
an old trailer, it may only have a 50 amp w/220 volt service box. Good luck!
Have a 30 gal water heater with leaks in a 1400sq ft house. Looking into this product to replace it. We only use one hot water supply at a time due to water pressure lack with the well water and pump system. Could this be a good fit?
BEST ANSWER: Possibly, but it would depend on the number of applications you would need this water heater to supply hot water to. The RTE-13 will only handle (1) major application at a time. For more help, please contact our sales department at 1-866-577-3014
Is this 110 or 220 volts
Dan on Jan 23, 2016
BEST ANSWER: 220, 60amp, pulls some serious juice but has worked like a champ for 3months for us.  We use in a 2BR, 1BA home. Instant hot water in kitchen, takes a minute to get to bathroom located approx 15ft away but to be expected. Won't believe how small this thing is. Not sure about longevity but at that price point its nearly disposable as long as we get at least a couple years out if it.
Have 3 bathrooms all on same floor house is 1,370 ft in size all sinks showers are within 10 ft of each other. will this work for them all?
Jer on Jul 23, 2016
BEST ANSWER: I'm in a 3/2 1400 square foot home in Florida, and it's summer. Bare that in mind as I tell you that it works great for both of my showers & all of my sinks. I have no other water heaters than this one. We make sure to not attempt taking showers simultaneously.
We have 5 people in our household. Will it be able to keep up hot water for everyone without running out?
Jonnymack on Jul 18, 2016
BEST ANSWER: It will only supply one source at a time, meaning no washing hands while
showering but otherwise, it has been very dependable going on 8months for
Keep in mind that I think it was a 50amp power supply so be sure you can
make that happen. Won't believe how small it really is, shocking, but it
has done the job just fine.
Money well spent so far.
I just had a walk -in tub installed will this give me enough hot water to fill
Mr Marc on Jul 9, 2016
BEST ANSWER: Yes, We installed this 9 KW to heat water for our kitchen ,sink,
dishwasher, full bath and our laundry room. With out a doubt one of our
best investments. But we own our solar system. Sure beats paying propane
cost. Solar is the way to go.
could this be used in a manufactured home that is 28ft by 52ft with 2 baths, with medium usage
Rene' on Jul 1, 2016
BEST ANSWER: The RTE 13 is a single application unit. From your question I can see you stated central NY as your location. This unit would struggle to supply hot water to a shower in the winter months if that is true.
How hot will the water get? I need 120 to meet code specs. Can the work?
Lebrone on Mar 19, 2016
BEST ANSWER: It gets plenty hot for a shower or to wash clothes. I recommend putting an in line filter in because the system is very picky with any trash getting sucked into it. Hope this helps
Would this product work to heat a washing machine in Boston, MA? It is for a rental unit and would only be used for one common washing machine as the units each have their own hot water heater.
Seneca on Jan 5, 2016
BEST ANSWER: Yes, you'll need the throttle the volume through it by partially closing the supply valve at the machine to control 3 gallons a minute.  Easy if it's a top loader. Just feel the temp of the water coming in. Close the valve for hotter.
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I have a large Jacuzzi tub and currently my hot water heater runs out of hot water before filling the tub. Will this product help fill the tub with hot water?
Keith on Jul 6, 2016
Probably not,
You can ask Rheem on their site.
It will produce water at that temperature, but it will be a small flow of water.
Rheem makes a larger natural gas continuous water heater 95 series.
This has a good flow of warmed water.
It can also replace your hot water tank, as long as you are not filling your Jacuzzi and showering at the same minute.
CPO, Amazon, Home Depot & Wal-mart online sells them.
Its about $1,200.00 for the largest size, but you can remove your hot water tank.
Note: they sell both 'N' natural gas,
'P' propane.
Available indoor or outside units
(outside units needs no venting).
Indoor 'High Efficency' units vents using standard PVC fittings & pipe.
You'll also need an outside vent plate $25.00 available in 2" or 3". CPO or
Also needed...
•Water Valve kit $75.00 CPO
For flushing unit of build-up,default,pd.html
• 2" or 3" outside vent plate. Plastic but very good quality. CPO or Amazon
2" PVC venting is for short run venting with few turns.
3" PVC venting is for long vent runs with several turns.
Rheem has a simple chart for determining 2" or 3" PVC venting.
You can ask Rheem on their site, I have the chart also, if you cant find one.
If you are venting through brick and want a nice job use a Core Drill Bit.
I think this is the largest available size tankless water heater.
RGTH-95DVLN H= High Efficiency
N=Natural Gas
Meets Energy tax credit
CPO Free ship No tax?
$1,149.00. RTGH-95DVLN,default,pd.html?gclid=CjwKEAjw2PK7BRDPz5nDh9GjoGcSJAAybcS3cRP2oiy7qGJwj8_hZDXbWTJFmvOTeaFXc4CHNRMh6BoCYwjw_wcB
Have an awesome day !
I'd like to enquirer into whether the voltage is 240V.
Joe on Jul 25, 2016
BEST ANSWER: It has one burner that requires 220V. Be sure that you are sizing correctly
- too small and you won't get the hot water you need - too big and you
waste electricity. This one works great for our bathroom, but really
struggles to supply hot water to the washing machine in the winter.
While I'm in the shower for about 5 minutes, I start to loose hot water, will this help to keep it from going cold on me
Ashley on Mar 12, 2016
BEST ANSWER: It all depends on how hot you like to shower and how many gallons per minute is being used by the shower. I use mine on a wash sink in my shop and with the faucet all the way open it will burn me if I turn the temp control up too high. The other thing to consider is the electrical demands this unit has. It will be very expensive to run the required electrical especially if you install this very far from the breaker panel. From your description of losing hot water after 5 minutes it sounds like it is fine until then and then your existing water heater tank runs out of hot water. It would probably be way more cost effective to install a larger water heater. This unit will give you plenty of hot water under normal shower uses, but keep in mind the cost to install and if you have a big enough electrical service to your home to support its operation. Draws 55 amps while heating. Hope this helps. This is a great unit when working under its intended conditions, which is what you are doing.
I plan to build an outdoor shower with hot water outside my backyard. I leave here in San Pedro, Ca, I wanted to know if I can I use this tankless heater outside expose to the element? We hardly get any rain here and low humidity. Or does the unit need to be enclosed? If so, would a small cover be sufficient enough to be mounted outside the house?

Thank you,

Glenn on Jun 11, 2016
BEST ANSWER: Hi Glenn, Nice idea, the thing to remember is that it is an electric unit and to my knowledge is not water proof, If you built a waterproof container of sorts to protect it from the rain it will work. MAKE sure it is properly grounded you don’t want to electrocute the user. You can also place the unit in a building and plumb it outside, humidity should not effect the unit. Call rheems Tech to make sure they are very good and give you exact answers..Mine in stalled inside my bathroom..
Could I use this to replace my current gas water heater
sandy the candy on Dec 25, 2015
BEST ANSWER: Only if it is a whole house tankless water heater. This appears from the ad to be a point-of-use which means it has to be located very near to where the hot water is needed. For example: if you want hot water in the bathroom then that's where a point-of-use tankless would have to be located to provide hot water to the sink and the shower or bathtub. If you then want hot water in your kitchen, you'd have to have another point-of-use located say, under the kitchen sink. If you've got more than 1 bathroom then each would need a point-of-use. Best thing is to look for one that says it is whole house! You can replace your current gas water heater with these, but you need to be very careful that you are fully aware of what you are buying! Don't just get the cheapest thing! Look at activation flow, maximum gallons per minute and, under application, it will say whether it is point-of-use or not!
I am thinking of replacing my 40 gal tank at our cottage. Will this do the job and would it be easily emptied in the fall?
bandslak on Nov 17, 2015
BEST ANSWER: Please reference the answer to georgediepold above. If you only use your cottage in the warm months you could also consider a portable tankless water heater. These have a valve on the unit that you turn to actually drain the unit and are built to be temporarily installed and then removed in the cold months. IF you use your cottage throughout the year, do not get a portable! Your heater may freeze in temps under 32 degrees!
I own an apartment complex and installed 20 of these unit (one per apartment). Each apartment is a one bedroom, one bath and also has a dishwasher. I am having trouble with water pressure for hot water in all the areas. is this unit too small for a whole one bedroom apartment? What size would you recommend and would the new size be compatible with the current one?
Keith on Sep 16, 2014
BEST ANSWER: Your pressure is determined by the cold water coming in from the city,,in most cases,,this may have had a economy fixture in the cold inlet side...take one back apart and look in the cold and hat side and makes sure theres no abstruction,,,,,maybe hook water hose to cold side in yard and shut water through it to be sure..
Can this b installed in a camper trailer?
Reba on Aug 13, 2016
BEST ANSWER: The unit requires 60 amp circuit and wiring. Camping trailers are generally
30 amp, larger RVs are 50 amp. I'd say no.
Can this b installed in a camper trailer?
Reba on Aug 13, 2016
BEST ANSWER: Space wise, sure. I think the biggest problem is that it instantaneously draws 60 amps. I'm not sure what typical shore power is at a campsite, but i think my boat's main breaker is only 40 amps.
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Would this unit provide enough water for two bathrooms with sinks and showers in each?
Randy on Jul 26, 2016
BEST ANSWER: No. Get a bigger one. 
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Can it heat my pool?
Mike on Jun 7, 2016
BEST ANSWER: LOL. It can fill a bathtub. How big is your pool. 
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Can this be installed in an rv or motor home?
oscar on May 13, 2016
BEST ANSWER: There is no reason why it couldn't be PROVIDED you have sufficient power available. This unit draws 58 amps while heating and will require an additional circuit for it. Otherwise no issues. 
How many GPM
Drew on May 6, 2016
BEST ANSWER: 3 GPM.  Inlet water temperature might drop it to 2 if it's 35 degrees.
We are looking to replace the water heater in our 26 ft motorhome, is a unit such as this recommended for recreational use? Is there a unit similar to this that could be used if this particular one is not an option? Thanks!
Adam on May 2, 2016
BEST ANSWER: I cannot say enough about how good the "point of use" water heaters are.
However, it is very important that you "size" them correctly (e.g., get one
that will supply enough hot water in the winter when it has to raise the
temperature more than it does when it is warm). We use our 13 kW Rheem
Electric Tankless Water Heater for a bathroom and it works perfectly year
round (we live in Arkansas and have rather mild winters). In the kitchen,
we have an 18 kW tankless water heater that services a second bathroom, the
kitchen sink and the dishwasher (and, I believe it could handle more). If
you will only be using yours for your kitchen sink and bathroom sink and
shower, I believe it will do the trick.
Does this water heater operate off a standard 110 outlet or is 220 required?
Tiny House on Mar 21, 2016
BEST ANSWER: This requires 220 and a minimum of 6 gauge wire and a 50 amp breaker. 
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What amperage circuit does this unit need
Rich on Dec 24, 2015
BEST ANSWER: You'll need a 60 amp breaker. 2-pole
Justin Cain***.****
Very interested in tankless water heater, electric. Live in Poughquag NY, some fairly cold winters. Our townhouse has 40 gallon water heater now, forget about it. Two and a half baths with master bath a Jacuzzi, which we don't use, not enough hot water.When very cold out, we take fast showers. Which of your products would be suitable for us? Thanks
georgediepold on Nov 21, 2015
BEST ANSWER: I'm not a company representative. I have some experience with tankless water heaters. Things to consider are how big your townhouse is and how far apart the faucets/appliances are that would provide hot water from your tankless. Do you have a dish washer? A clothes washer? Where are they relative to the kitchen sink, the three bathroom sinks, etc.? Are you going to rely solely on tankless or keep the 40 gallon conventional going too? Then start looking at units specs and details with all that info. in mind. You really need to determine your necessary flow rate which is the total approx. flow rates of all your appliances, faucets, shower heads. For faucets and shower heads, according to the Federal Energy Policy Act 1992, the flow rate has to be under 2.2 GPM. So that info. you now have! There are point-of-use tankless and whole house tankless. With POU you'd probably need multiple units as they have to be very near to the device you want the hot water for!
If I use exactly 4 gallons in a minute, how long before before I can get 4 gallons again? Can this be done repetitiously to wash dishes in a coffee kiosk?
Bob on Apr 25, 2015
BEST ANSWER: It will heat water at the rate of 4 gpm. As long as the flow rate is 4 gpm or less, it will heat the water to the desired temperature instantly and indefinately. It rapidly heats the water as it goes through the unit. Do not think in terms of heating and maintaining a volume of hot water. It simply brings the water to temperature as it passes through the manifold. If you ecxeed 4 gpm, it will give diminished performance.
Can this unit (or any other Rheem tankless unit) be used in a park model mobile home? Can any of them use propane? If it is flushed out and winterized can it be mounted on the exterior of the unit?
Greg on Mar 30, 2015
BEST ANSWER: Rheem does not spec. their units for use in mobile homes at this time.


RHEEM® or RUUD® Residential Tankless Gas Water Heaters


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.


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.


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.


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.


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.


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 ( 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 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