Model # ECO 27

Internet #203316218

Store SKU #1000017272

Store SO SKU #1000094390

EcoSmart 27 kW Self-Modulating 5.3 GPM Electric Tankless Water Heater
0854920002091

EcoSmart

27 kW Self-Modulating 5.3 GPM Electric Tankless Water Heater

  • Can support Whole House Applications
  • Consult electrician. Requires 3 x 40 AMP Double Pole Breakers
  • Same-day installation in most areas. Call 1-855-400-2552 by noon.
$505.00 /each

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Product Overview

Eco Smart, 3 Smart Steps for Endless Hot Water
Attention Product Requires Professional Installation

EcoSmart Electric Tankless Water Heaters, also called Instantaneous On Demand Water Heaters, provide endless hot water on demand and only as needed. Self-modulating flow sensor technology regulates the amount of energy required to heat the water needed. This Smart Technology electric tankless water heater is configured for climates where incoming water temperature can reach as low as 37 Degree F. The ECO 27 is capable of heating nearly 3 GPM at this temperature. The ECO 27 is the largest electric tankless water heater available with Self-Modulating Technology. These models are well suited for homes in the Northern U.S. and Canada and in the southern U.S. that have large Roman-style or Jacuzzi tubs and that have generally more demanding water usage needs.

  • Lifetime warranty
  • Patented self-modulating technology and design
  • Never run out of hot water with an EcoSmart tankless water heater
  • Digital temperature control allows you to set your temperature in increments of 1 degree
  • All EcoSmart electric tankless water heaters come with an automatically resettable thermostat as opposed to a manually resettable thermostat; the integration of all components and quick connections are designed to promote simplicity for the installer and the user
  • Prior to purchase and installation please verify this model is the right size for your hot water needs
  • Click here to check out our buying guide on water heaters
  • Click here for more information on Electronic Recycling Programs

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Name 18 kW Self-Modulating 3.5 GPM Electric Tankless Water Heater 27 kW Self-Modulating 5.3 GPM Electric Tankless Water Heater Tempra 29 Self-Modulating 28.8 kW 5.66 GPM Electric Tankless Water Heater Tempra 24 Plus Advanced Flow Control and Self-Modulating 24 kW 4.68 GPM Electric Tankless Water Heater
Brand EcoSmart EcoSmart Stiebel Eltron Stiebel Eltron
Ratings (120) (141) (6) (45)
Flow Rate @ 45 F Rise (gallons/min) 2.73 4.10 4.37 3.64
Wattage (watts) 18000 27000 28800 24000
Indoor/Outdoor Indoor Indoor Indoor Indoor
Water Heater Features Wall Mountable Wall Mountable Overheat Protection,Wall Mountable Overheat Protection,Wall Mountable
Certifications and Listings 1-UL Listed,CSA Listed,ETL Listed 1-UL Listed,CSA Listed,ETL Listed 4-UL Certified,CSA Listed,ETL Listed 4-UL Certified,CSA Listed,ETL Listed
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Customer Questions & Answers

60 Questions111 Answers

Customer Questions & Answers

27 kW Self-Modulating 5.3 GPM Electric Tankless Water Heater
27 kW Self-Modulating 5.3 GPM Electric Tankless Water Heater

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5 answers

Is this unit a 3 Phase 240 delta that requires 3- 120 circuits or a Regular single phase 240 just requiring a wire upgrade and a new 40 amp breaker?

This question is from 27 kW Self-Modulating 5.3 GPM Electric Tankless Water Heater
Asked by
Texas
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June 7, 2015
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Answers (5)

Asked by
Bay Area, California
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Home Improvement Profile: DIYer
May 18, 2016
Answer: 
It is not a 3 phase unit. It is single phase. but it is 3 single phase heating elements, each wired to a 40 amp 240 volt double pole breaker. You will need 3 40 amp double pole breakers and three sets of wire to connect this water heater.
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March 2, 2016
Answer: 
FYI a 240 - 3 phase delta is all 240 volts phase to phase to phase unknown to ground unless u ground a leg, but even then there will not b any 120 unless u center tap one of the three transformers but still no 3- phase 120, and unless u have a commercial device at your house u won't have 3 phase power not even 2 phase just 1 phase 120/240 volt
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Asked by
chandler az
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September 3, 2015
Answer: 
its going to take 3x 40 amp double pole breakers and 8 gauge wires ran to the unit
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Asked by
Houston, Texas
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August 30, 2015
Answer: 
it's single phase 240, the installation instruction is very clear about this.
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July 14, 2015
Answer: 
From what I can tell, each heating element is individually supplied, which means they would be independent of phase. I believe the low voltage microchip inside is probably the only component that actually ties into all three phases, but most likely only monitors the voltage to verify that all three circuits are hooked up. Seems to me that this unit would definitely work.
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5 answers

I AM LOOKING FOR A UNIT THAT USES 120 VOLT BUT WOULD BE ENOUGH TO RUN (2) SEPARATE SHOWERS

This question is from 27 kW Self-Modulating 5.3 GPM Electric Tankless Water Heater
Asked by
CALIFORNIA
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May 26, 2015
CAN'T SEEM TO SEE WHAT ALL IS 120 VOLT, AND HOW MANY GPM WOULD I NEED TO HAVE TO RUN THE (2) SHOWERS.
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Asked by
Bay Area, California
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October 20, 2016
Answer: 
You will most likely need to buy two smaller units and install them right at the point of use, this will require wiring and plumbing reconfigurations.
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Asked by
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December 30, 2015
Answer: 
There are no whole house hot water heaters,tankless or tank type, that run on 120 volts. Only some small, point-of-use, hot water heaters, the type that would be used to heat water for use in a sink, run on 120 volts. What you want, all required 240 volt service, and require two or three double-pole 40 amp circuit breakers, which would require either 4 or 6 spaces available in an at least a 200 amp Read More
There are no whole house hot water heaters,tankless or tank type, that run on 120 volts. Only some small, point-of-use, hot water heaters, the type that would be used to heat water for use in a sink, run on 120 volts. What you want, all required 240 volt service, and require two or three double-pole 40 amp circuit breakers, which would require either 4 or 6 spaces available in an at least a 200 amp breaker box, or to have a sub-panel installed by a licensed electrician if there's not enough space in your breaker box for the required number of breakers. In essence, what you're asking for, doesn't exist. Your other option is a natural gas or propane fueled tankless hot water heater, which are available in indoor and outdoor installation models, and these also require a 120 volt service installation for the controls, and ignition circuits.
I hope my answer is helpful. Good luck.
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September 10, 2015
Answer: 
120 volt is not enough power to heat water fast enough for one shower unless you live in extreme southern Florida or the Caribbean where the incoming water temperature is 77 degrees. Think of 120 volt as the smallest burner on your stove and 240 volt as the largest burner. You wouldn't put a pot of water to make spaghetti on your smallest burner because the amount of heat from that burner is too low. Read More
120 volt is not enough power to heat water fast enough for one shower unless you live in extreme southern Florida or the Caribbean where the incoming water temperature is 77 degrees. Think of 120 volt as the smallest burner on your stove and 240 volt as the largest burner. You wouldn't put a pot of water to make spaghetti on your smallest burner because the amount of heat from that burner is too low. You'd put the pot on your largest burner. Now think of how high you turn the knob on the burner as the kilowatts. The faster you want the water to heat, then the higher you turn the burner up, and the higher the kilowatts of the unit you need. Use the chart to pick the model you need based on your incoming water temperature and your requirement to run 2 showers at the same time. Read Less
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July 14, 2015
Answer: 
This unit is designed to run three showers at one time. There is a lesser unit that operates on two 40 amp 240 v breakers as opposed to three 40 amp 240 volt breakers. I doubt you can find one that will run off of 120 volts that can heat two showers.
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June 7, 2015
Answer: 
Thank you for your recent inquiry with The Home Depot. Unfortunately, I need more information from you in order to properly address your question. For any other questions, please call us at HomeDepot.com Customer Service 800-430-3376. Thank you for shopping Home Depot.
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5 answers

what is the hights setting, water temperature

This question is from 27 kW Self-Modulating 5.3 GPM Electric Tankless Water Heater
Asked by
pittsfield nh.
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October 30, 2014
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Asked by
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October 19, 2016
Answer: 
I had my unit for around 7 months with no prob. Then I noticed intermittent periods during a shower of cold water. So, I found out that my half wit wife had figured that since we had guests coming she should turn up the temp setting from 115 to 135. So I called ECOSMART and they explained that there is a scald guard and by tuning it way up you get these cold spots. They were very friendly and Read More
I had my unit for around 7 months with no prob. Then I noticed intermittent periods during a shower of cold water. So, I found out that my half wit wife had figured that since we had guests coming she should turn up the temp setting from 115 to 135. So I called ECOSMART and they explained that there is a scald guard and by tuning it way up you get these cold spots. They were very friendly and knowledgeable. So, buy this unit and don't show your wife where the temp setting is. Read Less
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Asked by
Dallas, TX
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December 28, 2014
Answer: 
140 is the highest setting it will go. I let my wife test it and it is definitely hot enough.
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Asked by
Meers, OK
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November 11, 2014
Answer: 
The highest setting is 140 degrees but the water might not be heated to that temperature if the incoming (outside) water is too cold to begin with. I found that a setting of 125 degrees provides plenty of hot water for me to run 2 showers simultaneously
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Asked by
Vermont
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November 1, 2014
Answer: 
140 degrees.
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Asked by
Vermont
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November 1, 2014
Answer: 
140 degrees
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4 answers

How many appliances can run at the same time with this unit? For example; can one person shower at the same time as washing clothes and running DW?

This question is from 27 kW Self-Modulating 5.3 GPM Electric Tankless Water Heater
Asked by
Kentucky
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November 17, 2014
My regular water heater failed inside of the unit and I am thinking of replacing it with this model. How do I know if it will sustain enough hot water to do multiple chores such as dishwasher, clothes washer, shower etc. at the same time? How many appliances can be used at the same time if any?
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Asked by
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December 29, 2015
Answer: 
Agreed also if you on city water or well makes a difference also
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Asked by
Albany, GA
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January 23, 2015
Answer: 
I can run 4 showers at once....or 2 showers, a DW, and washing machine at once with no issue whatsoever at the 140 degree setting....
Im in southern GA though....
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Asked by
Dallas, TX
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December 28, 2014
Answer: 
I have not tested the washer and multiple appliances yet. I was able to try two showers at the same time at140 degrees F. And it handle it just fine. This is in Texas however.
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Asked by
Vermont
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Home Improvement Profile: DIYer
November 19, 2014
Answer: 
You need to go online and select the area of the country in which you live in and decide whether the unit will be suitable for your application. The main factor to consider is your incoming water temperature as this will determine the amount of gallons per minute the water heater can heat.
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Customer Reviews

27 kW Self-Modulating 5.3 GPM Electric Tankless Water Heater is rated 4.1 out of 5 by 141.
Rated 5 out of 5 by from Electricity saving is great. I found the tankless hot water heater very simple to install and it has worked very well in providing plenty of hot water. The 3/4 inch water lines seem to be to large for plenty of hot water. I installed a 3/4 inch shut off on the supply line and needed to close it some to slow down the flow and then we received plenty of hot water. The biggest problem was getting a licened person to sign the warranty card after I had done the install. In Conn a home owner is allowed to install anything in his own home, electrical or plumbing legally, of course with a permit. I felt the requirement to have a licensed person sign the warranty card was a surprise as well a an extra burden. The directions were very clear and easy for anyone to follow. Mark from Connecticut
Date published: 2016-09-27
Rated 5 out of 5 by from ECO-27 I bought the ECO-27 on line. It had a September 19th arrival date, it arrived on the 17th. Since the unit requires special electrical hookup I had an Professional electrician install the wiring and double pole 40 amp breakers. I also had a plumber hookup the Water inlet and outlets. This is required for the warrantee. While we have been using the unit for a week, It has worked as advertised. It is extremely easy to set the hot water temp. you want. I have set our unit for 120 degrees F. So far we have used the unit with 3 hot water sources going at the same time; Dishwasher, washer, and shower with no loss of hot water. One unexpected thing was that in our master bedroom shower, it was taking up to a minute or longer for us to get hot water. Now it only takes about 30 seconds for hot water to get to the shower. If you are planning to buy this unit, be sure to budget for the electrical hookup and pluming also unless your are more of a handyman than I am.
Date published: 2016-10-04
Rated 1 out of 5 by from So far, I have installed three of these in my home. The first one gave lukewarm water. Evidently ... So far, I have installed three of these in my home. The first one gave lukewarm water. Evidently only one heating element was working. Home Depot replaced it at no charge. The second one did not work at all and in addition it leaked at one of the joint in the heater. Ecosmart replaced the second one, so for a third time we found ourselves installing one of their heaters. This third heater worked well, and we breathed a sigh of relief...for 6 months! It has now quit working. So we are going to eat our loss, and buy a different brand. Three strikes and you are out!
Date published: 2016-11-27
Rated 5 out of 5 by from Excellent Water Heater. Perfect choice! 1750 sq ft 2 bedroom 1 bathroom house, dishwasher, washing machine, 4 people. Water heater is totally adequate, and could handle more.
Date published: 2016-09-21
Rated 1 out of 5 by from Normally I do not provide feedback on products unless it is really bad or excellent. In this inst... Normally I do not provide feedback on products unless it is really bad or excellent. In this instance this product is ABSOLUTELY WORTHLESS. Called and spoke to a couple of different tech support folks at Ecosmart to make sure I was getting the proper size unit and still no good. Not sure how the Ecosmart did their testing to come up with their advertising figures, but in the real world there is NO WAY THIS UNIT CAN HANDLE ANYTHING MORE THAN A SINGLE SHOWER AT BEST IF YOU WANT HOT WATER OVER 105 DEGREES and that is with a flow rate of probably 1 GPM. Their advertising info. is so far from the mark, that it is a flat out lie and false advertising. Bottom line, this is maybe good for a studio apartment with one shower. If you want the full details read below. Total time spent (wasted) installing unit and trouble shooting about 16 hours over 4 days, not including time spent going to HD for parts. The ecosmart 27 model states 5.3 GPM, however, could not even get 2 GPM if you want hot water. The description states "The ECO 27 is one of the most powerful models from our full line of tankless water heaters, with the capacity to handle a large single-family home and is perfect for a large Roman-style and Jacuzzi tub or high demand of hot water between multiple applications, even in colder climates". http://www.ecosmartus.com/products/electric-tankless/eco-27/#product-tab1 1. Location is Northern NJ (a green zone on their sizing map) and according to the map it should handle two showers and sink at the same time with the inlet temp being 52 degrees and an output at 105 degrees based on their website at http://www.ecosmartus.com/products/electric-tankless/eco-27/#product-tab3 2. Home has 4 full baths (one with jacuzzi tub) and a 1/2 bath. Wanted to be able to run two devices at same time at the minimum. (kitchen sink & shower or Laundry and Kitchen sink, or two showers) Wanted to originally get the 36 model, but did not as I would had to upgraded the electrical supply coming into the house to 300amps (cost about $2,000) which I considered seriously but based on conversation with the tech support, went with the 27 as they said it would at the minimum handle two showers at once. Ran the required electric three dbl pole circuits with ground using 8 AWG wire and connected to the unit (spent ~ $600 in materials). Set the temp to 120 degrees and opened the hot water on sink closest to the unit. After waiting about 5 minutes or so water would not get hot, so I raised the temp to max of 140 degrees. Still no hot water (luke warm at best) Called tech support and checked to make sure that the proper AMPS (234 AMPS), heating elements, thermostats, and everything else was in good working condition but no hot water. One of service tech said, that the flow was to much and that I should use a flow reducer and suggested using a ball valve to decrease the flow rate on the outlet port on the unit. Re-plumbed the unit and installed ball valve and slowed the flow (volume of water) the temp did go up, however could only use one sink or shower at a time. When trying to use sink and shower water flow was diminished to a point that it is about 1/4 of the normal flow rate and really not good for showering. According to the map even in the blue zone with an inlet temp of 37 degrees, the unit should be able to run 2 sinks and a shower at 105 degrees with 2,7 GPM. There is no way this is possible, as I had to almost completely shut off the ball valve to get hot water guessing flow was reduced to ~ 1GPM to reach ~105 degrees. The water in the shower basically had no pressure but at least warm / hot. Then my wife tried to take a bath (jacuzzi tub) with nothing else and the water flow was a trickle and could not fill the tub (the water in the tub turned cold even though it was only filled up about a 1/8th of the way) Do not buy this product.... Had it for about two weeks. It does not meet my expectations.
Date published: 2016-12-24
Rated 1 out of 5 by from I had one of these at my old house it seemed to work ok this new one can not keep the water hot f... I had one of these at my old house it seemed to work ok this new one can not keep the water hot for a full bath tub. It is strange because the water will be hot for a minute or so then go cold/Luke warm. Wished it worked. I would like my money back but probably hosed because I bought it 7 months ago for renovation. Now that I have finally moved in, I found it does not work well.
Date published: 2016-11-26
Rated 5 out of 5 by from Love it, love it, love it! I have a Jacuzzi tub that fills faster than 5 GPM (plus 3 showers + a ... Love it, love it, love it! I have a Jacuzzi tub that fills faster than 5 GPM (plus 3 showers + a washing machine + a dish washer, etc.) so I've put two of these units in series (see photo), setting the first to 126 degrees and the second to 124 degrees so that the second is activated only when needed (quite rarely). For the first time since we've lived in our house, our kids and guests can shower or bathe in hot water ever after we've filled our Jacuzzi tub. Fabulous!!! Did I mention that this product has a lifetime warranty and has a super-small footprint. I've been replacing my way-too-big (80 gal), way-too-energy-hungry water heater every 8-12 years like clockwork (rather expensive). Now I think we're set for life!
Date published: 2016-12-27
Rated 5 out of 5 by from Does exactly what we needed for our home... We live in SW Florida, so our ground water temp was ideal for this model. The KEY to this solution working is having your electrical capacity checked out PRIOR to purchasing. I cannot stress this enough. I fortunately live in a newer home that has 300Amp service, so there was no issues adding this solution into the mix. Not running out of hot water and reducing our electrical bill is a win/win. There are 6 people in my family and this unit keeps up without issue.
Date published: 2016-05-10
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