Reduce your home's energy costs with this Self-Modulating Electric Tankless Water Heater. Supplying continuous hot water, it allows for instant ho water on demand by heating water only when needed. Easily control the temperature in 1 degree increments from 80 degrees to 140 degrees F.
Energy and cost savings: heats water only when it is needed for savings of up to 50% on water heating costs when used in a point-of-use application or 34% when used as a whole-home solution
Instant, continuous hot water: instantly provides ample hot water for up to 2 showers and 2 faucets (review selection guide below to confirm this water heater will provide the hot water needed based on your geographic location)
Space savings: small, compact design fits perfectly in tight places like under cabinets and sinks
Great investment and value: energy cost savings and a 5-year heat exchanger and 1-year parts limited warranty
Easy to adjust: electronic temperature control adjustable in 1-degree increments from 80-140 degrees F with easy-to-read display (Celsius and Fahrenheit compatible)
Easy installation: compatible with 3/4 in. water connectors for flex hose installation and no venting or T and P valve required for Easy installation (professional installation recommended)
Easy to maintain: durable, easy-to-replace heating elements
A reliable hot water solution from Rheem, the global leader in water heating
Before purchase and installation, please verify that you have the proper electrical requirements for your chosen heater
So far, so good. I recently purchased the 11kw model to replace a 20 gallon tank electric water h...
So far, so good. I recently purchased the 11kw model to replace a 20 gallon tank electric water heater that serves (an added on) bathroom with a stand-up shower only. It is now installed under the sink. I was already used to conserving my hot water in this particular shower so I already use a 1.2 gpm low flow showerhead with shutoff/flow lever (available at HD). I'm keeping the low flow set up since I think it'll help ensure that this tankless water heater is able to heat my incoming water and operate most efficiently. My incoming water is from a backyard well (SW Oregon) and it is pretty cold, so far this water heater delivers very adequate hot water and flow for me with the unit set at 115 degrees. Unless you're very knowledgeable, definitely hire an electrician for the wiring upgrades. My meter/service panel happens to be just on the outside of this bathroom wall, so the new wiring run was fairly easy. Don't skimp, get new high amp wiring and new high amp breakers installed as recommended by the manufacturer and you should be fine. The only thing I would consider before buying and converting to tankless is...how much hot water do you need?...and how many fixtures are served? Study what is available carefully and consult a plumbing/electrical contractor before tearing anything out first. I'm happy with the product and my results here.
5 people found this helpful
Feb 19, 2021
Easy installation, instant hot water.
We live in a 2700 Square feet home in Florida with 4 bedrooms & 3.5 baths. We have your typical dishwasher and washing machine. We purchased the 27KW unit for our entire house. The installation was easy and instructions straight forward. The unit is able to heat the water through the entire house, even while 2 are showering and the dishwasher is running. Overall, we are very satisfied with this unit.
15 people found this helpful
Feb 16, 2021
Choose the correct size and yes you can recirculate for instant
So I studied over this tankless idea for a few weeks and here is some of my research/thoughts.
1. Test your inlet water temperature. 2. Take a 5 gallon bucket to each fixture and gauge how many GPM each fixture puts out in a minute.
3. Look at your electrical panel. This 27KW requires 3/40a double pole breakers and 3/8-2 runs of Romex. Minimum requirement is a 200amp main breaker.
4. If you have some electrical knowledge you can very easily hook this up electrically and easily shark bite/Pex the plumbing.
5. I can run 2 showers wide open hot @3.5gpm with 56.5* inlet temp and still have 1/3 of the final element left for more.
6. I just finished installing a water recirculation pump at heater and bridge valves under master bath sink and kitchen sink. I installed the pump on a smart switch which I have automated in our house. I have the pump on slowest setting.
I plugged pump into a smart plug at tank. I have a smart outlet that plugs in at kitchen sink.
You can turn that switch on at kitchen sink and it activates the tank smart plug to kick the water pump on.
The bridge valves allow cold water in hot water lines to flow into cold water lines until the bridge closes internally (Meaning water is hot at bridge).
Also have smart activation in master bathroom. No more wasting water waiting on it to heat up.
When water pump is activated in any automation it’s set to turn off after 2 minutes per Smart Things App.
BOKYWOX Hot Water Circulation Pump 3/4'',3-Speed Circulating Pump (RS15-6SB) This is the stainless model.
Grundfos 595926 Bridge valves So now I have endless hot water and now instant endless. At .3gpm the flow meter activated first element.
Hope this helps someone.
51 people found this helpful
Dec 27, 2020
Installed this heater 3 months ago but wanted to evaluate performance etc before reviewing. Being a retired plumber I did install myself including adding breakers to panel and pulling wires. This unit requires 200 amp service and 3 40amp 2 pole breakers. Make sure your panel meets requirements and has available slots in panel. I left the original water heater breaker in but turned it off and disconnected wires. If you have a very good working knowledge of plumbing and electric you can do this install. Allow 1 day to do/run electrical work and 1 day to install heater. There will be some piping that will need to be reworked in order to make good clean connections to heater. Living in AZ we don't generally have extremely cold weather. Right now water temp into the heater is about 50 degrees and the Retex27 heats it to 110 degrees with no problem which is the temp I have set it for. 110 degree water is barely tolerable and not get scalded. Make sure to install a service valve kit as tankless heaters require cleaning of the heating elements. Cleaning elements is a simple process, just takes some time. I've seen some reviews say their lights dim when it turns on. I have not had that issue. Having a teen daughter it is nice not having to wait for a tank heater to recharge and she likes being able to stand under the hot water longer! Another myth with tankless heaters is it is instant hot water. Not true, it is endless hot water. You still have to wait for the cold water in the pipes to flow through and the hot water to arrive just like a tank heater. Another bit of info, the ECO27 is the same as the Retex27. The ECO27 has a lifetime warranty and Retex27 is 5 years. I did not have the luxury of waiting 2 weeks for the ECO27 to arrive as my old heater was leaking. If my research is correct Ecosmart manufactures tankless heaters for Rheem and parts are universal. Bottom line, I reccomend either of these heaters and tankless is the way to go.
67 people found this helpful
Dec 23, 2020
Endless Hot Water
I love this small tankless water heater. I had some leaks at the threaded connections but resolved that with Rector T plus 2. The reason I haven’t given this product a 5 is the temperature control is acting flaky. Turning the dial doesn’t change the temp. I wiggle the knob and it will change a few degrees then stop again. I called Rheem for a warranty claim. They were excellent, and are sending a replacement main board.
The only problem I have with the design is that you have to dismount the unit to remove screws to take off the front cover. That could be easily fixed.
I finally got the temp up to 105 degree setting and took a shower. The hot water was great!
BTW I installed this in our RV on a 50 amp feed.
9 people found this helpful
Sep 19, 2020
Recommended but installation is difficult
Just finished installation. Unless you are very comfortable with plumbing mods and electrical installation, factor in a professional electrician and/or plumber to the cost of this unit. This unit (18Kw) requires two separate double 40 amp breakers since the unit draws 75 amps. My old tank water heater had one double breaker and I had no available slots in the breaker box, so I disconnected a hot tub that wasn't used much (I'll go back and add a box for that later). The most difficult part was that the manufacturer required 8 gauge wire for both circuits and my old unit used 10 gauge. I had 6 gauge laying around so I used that but I would have been better off going to HD and buying 8 gauge since the 6 was a bear to work with and requires huge conduit (see pic) - the wire I used also had an outer insulation with added to the size. Do yourself a favor and research "wire ampacity" so you can correctly calculate the wire gauge based on the distance from the breakers to the water heater. Distance makes a big difference in choosing the correct wire gauge. Since my circuit was only 20', I probably could have used smaller wire.
This heater is working well so far (2 days) and heats as fast as my old tank, but I live on hot Florida where the water comes out of the tap at 78 degrees.
21 people found this helpful
Aug 9, 2020
Great Unit BUT Think through The Installation Before You Buy Your Parts!
The unit (Rheem RETEX 13) itself is excellent! My installation took 7-8 hours longer than it should have because 2 separate Home Depots' "experts" sold me the wrong parts. They both tried real hard but they made it harder than it really is. With the right parts a DIY install should only take 3-4 hours and it isn't hard at all.
Parts you'll need: a 60 Amp double pole breaker, 6/2 wire, (plus I recommend a cut off box), PVC conduit, a water purifier (makes your unit last longer), 2 pieces of 1/2" female thread to sharkbite flex hose (the ones you use for a sink) with shut off valves (for servicing your unit), 1/2" CPVC, a 1/2"elbow, 2 pieces adapter 3/4" male thread to 1/2" CPVC (for purifier), and whatever adapters you need to tie into your water in and out pipes.
Tools you'll need; a flat head screwdriver (for connecting the wires), a small phillips head (for the unit's cover), level (make sure the input hose is level), wire cutters, PVC cleaner and glue (HD sells a kit with both), 2 pairs of pliers or open ended wrenches (to connect the flex hoses to the unit and the adapters to the purifier), a screw gun (to mount the unit and the cut off box), some pipe clamps (I recommend clamping your pipes to the wall, a handfull of screws, plumbers tape, and plumbers paste.
Before you decide to buy one of these make sure your panel has enough power coming in to accommodate the unit.
Install; (Turn off water main and main breaker before starting)
I started by running my wire from the panel area to my garage where it was to be installed. Next I took the 2 small screws that hold the cover on, then used the included template and mounted the unit to the wall. I put a screw part way in above the top of the unit so it would not slide up and off the screws while I worked on it. Next I chose a spot for my cut off box and mounted it to the wall. (Do NOT install this below the unit.) Next I installed a 12" long 1/2 female flex hose with built in valve and sharkbite end to the water in and out on the unit. On the hot side (left) I connected a piece of 1/2" CPVC with a 1/2 to 3/4 adapter on it, then glued that piece to the 3/4 hot pipe that runs to my 2 showers, garden tub, 2 bathroom sinks, kitchen sink, washing machine, and utility sink. On the cold side I connected the already installed flex hose to a piece of 1/2" CPVC. On the purifier I had already installed a male threaded 3/4" to 1/2" converter on the in and out so I glued the 1/2" pipe to the output. From the purifier input I ran another piece of 1/2" CPVC to a 90 degree elbow, then another piece of 1/2" CPVC down to a 1/2" to 3/4" converter attached to my cold water in pipe. After allowing 3 hours (yeah overkill) for the glue to dry I turned the water main back on and water tested the unit until I was satisfied there were no leaks. Next I ran a piece of the 6/2 wire from the cut off box to the unit, then connected the wire from the panel to the cut off box. Back inside the house at the panel I removed the 30 Amp breaker from my old water heater. I connected the new wire to my 60 Amp breaker and installed it into the panel. Before turning the power back on I turned on the hot water on a nearby sink and let it run for a few minutes. It is VERY IMPORTANT to get the air out of the line. With the water still running I threw the main breaker, then the water heater breaker. No sparks, no smoke, everything looked OK. Then I went back to the garage, held in the button to turn on the unit, set it at 130 degrees, and went back inside. It took (and takes) about 1 minute for the heated water to reach the sink but once it does it goes from warm to hot very quickly. With everything up and running I re-installed the unit's cover. I have been using this for 2 weeks now with no issues. After failing to install with the parts that HD originally sold me I did call Rheem's customer service to verify the install I had in my mind would work. They were very helpful! The quotes I got to have a professional plumber and electrician do my install were insane. I'm all for paying a fair wage but paying someone's mortgage and car payment for 1-2 hours work just didn't fit the program. This is NOT a hard job, I would give it a 4 out of 10 difficulty.
*I used a few more pieces that what I described because I had to keep piecing it together with the wrong parts
48 people found this helpful
Jun 23, 2020
We have a two bedroom and one bath house and this hot water heater has no problem heating water f...
We have a two bedroom and one bath house and this hot water heater has no problem heating water for us. This was a very simple installation and it worked right away.
20 people found this helpful
Jun 11, 2020
This tankless water heater is small in size but really...
This tankless water heater is small in size but really heats up our shower in a jiffy! No more waiting for hot water or worse yet, losing hot water during a shower. We love it.
12 people found this helpful
May 28, 2020
Ran new 6/2 wire from the electrical box. New 60amp breaker. Flipped on the power and the LED say...
Ran new 6/2 wire from the electrical box. New 60amp breaker. Flipped on the power and the LED says "OFF" "80 F". Pushing the dial doesn't turn it on. Rotating the dial doesn't turn it on. It is a dud. I am sorely disappointed and I can't return it because I am past the 90 day window. Buyer beware!
3.5 kW, 120-Volt Non-Thermostatic Tankless Electric Water Heater, Commercial
Rheem Non-Thermostatic Tankless ElectricRheem Non-Thermostatic Tankless Electric Water Heater is ideal for a single sensor faucet or a single metering faucet for handwashing and other fixed-flow applications. This water heater offers quick, continuous hot water that is on demand for single point-of-use or multiple applications.See Full Product Description
ECO 27 Tankless Electric Water Heater 27 kW 240 V
EcoSmart ECO 27 is a 27-kilowatt tanklessEcoSmart ECO 27 is a 27-kilowatt tankless electric water heater ideal for providing hot water for apartments, condominiums, townhomes and other whole home applications. It can provide between 2.7 and 6.5 gallons-per-minute depending on the inlet water temperature. To select the best solution for your hot water needs, please refer to the sizing guide. With EcoSmart you will be happier knowing the warm water you expect is available endlessly, consistently, and on-demand, allowing you to reduce your water and energy waste. Now that feels warm all over! EcoSmart - Sharing the Warmth.See Full Product Description
Tempra 20 Trend Self-Modulating 19.2 kW 3.90 GPM Compact Residential Electric Tankless Water Heater
Powerful output, compact design, remarkablePowerful output, compact design, remarkable energy-saving features: Our whole house electric tankless water heaters are made to perform to the highest standards in terms of comfort and reliability. Intelligent self-modulating technology continually ensures the least amount of energy is used to heat the water. Digital temperature display for easy, accurate temperature control and maximum energy efficiency. A Tempra 20 Trend provides hot water at a constant temperature for up to 1 or 2 bathrooms in warm climates, or 1 bathroom in cool climates. See sizing guide to determine which model is best for you. Stiebel Eltron invented tankless electric water heating technology more than 90 years ago, and is still the industry pioneer and world leader. Our engineering and manufacturing tradition of excellence means you can depend on the performance and reliability of our products.See Full Product Description
SCR-4 27 kW 5.0 GPM Residential Electric Tankless Water Heater
TITAN Electronic Tankless Water Heater hasTITAN Electronic Tankless Water Heater has been around for over 35 years and is ideal for a wide range of applications. These models could be used anywhere from point of use to whole entire house (all depending on ground water temperature going into the unit). They are energy efficient and therefore you will be saving on energy cost. The electrical specifications are based on 220-Volt /240-Volt. Be sure to check specifications on unit being purchased. Voltage, amperage, breaker and wire may vary depending on local electrical standards. Consult a professional plumber and electrician for guidance. Remember, that any adjustments made on your unit will take seconds to reach point of use. Water temperature from 105°F to 120°F is adequate for all practical purposes.See Full Product Description