Model # ECO 18

Internet #203316216

Store SKU #1000047991

Store SO SKU #1000094374

EcoSmart 18 kW Self-Modulating 3.5 GPM Electric Tankless Water Heater
0854920002046

EcoSmart

18 kW Self-Modulating 3.5 GPM Electric Tankless Water Heater

  • Perfect for apartments with up to 3 people
  • Requires 2 x 40 Amp Double Pole Breakers
  • Same-day installation in most areas. Call 1-855-400-2552 by noon.
$421.32 /each

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Product Overview

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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 is 62 Degree F and above. The ECO 18 is capable of heating over 2.5 GPM, which is the equivalent of one shower head (with a 1.5 GPM flow) and one sink with a low inlet water temperature of 62 Degree F. Two showers can be run simultaneously when incoming water temperature is above 70 Degree F in warmer climates such as South Texas, South Florida, New Mexico, Arizona and South California.

  • 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 rights size for your hot water needs and electrical requirements
  • Refer to the info and guides for help with: location specifications map, installation, and troubleshooting
  • Click here to check out our buying guide on water heaters
  • Click here for more information on Electronic Recycling Programs

Info & Guides

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Name 11 kW 2.14 GPM Self-Modulating Electric Tankless Water Heater 18 kW Self-Modulating 3.5 GPM Electric Tankless Water Heater 24 kW Self-Modulating 4.6 GPM Electric Tankless Water Heater 27 kW Self-Modulating 5.3 GPM Electric Tankless Water Heater
Brand EcoSmart EcoSmart EcoSmart EcoSmart
Ratings (60) (128) (42) (160)
Flow Rate @ 45 F Rise (gallons/min) 1.97 2.73 3.64 4.10
Wattage (watts) 11000 18000 24000 27000
Indoor/Outdoor Indoor Indoor Indoor Indoor
Water Heater Features Wall Mountable Wall Mountable Wall Mountable Wall Mountable
Certifications and Listings 1-UL Listed,CSA Listed,ETL Listed 1-UL Listed,CSA Listed,ETL Listed 1-UL Listed,CSA Listed,ETL Listed 1-UL Listed,CSA Listed,ETL Listed
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Customer Questions & Answers

what causes the heating element to turn on?

Is it always adding a little heat to the manifold, and a temperature drop switches on the power. Or is it pressure or flow sensing?
Asked by: MikefromFL
Watch the video!!! :) That is what the video is there for... it will tell you exactly how the heating element works. I am purchasing one tomorrow, I will report the pro's and cons after it is installed and tested. Have a Great Day!!
Answered by: Bailey
Date published: 2017-03-06

Is this for a whole apartment or a single point?

Asked by: rh27
I have a 4 bedroom house and at most we only have 1 shower and 1 sink running at the same time but we have to turn it down as the water comes out too hot at times.
Answered by: Anonymous
Date published: 2016-12-04

Can these units be plugged In a 240 electrical socket

Asked by: GlenRay
Highly unlikely. It actually requires 2 separate 40 amp 240volt services. It draws 75 amps of 240volts at peak use.
Answered by: Hogie
Date published: 2017-01-07

what size service is needed 150 amp or 200 amp

Asked by: meangene
If you look at the specific unit you are interested in under the specifications, it will tell you what amperage is needed for that specific unit, and also the # and size of breakers and wire size needed. For example, the ECO 18 uses 2-40 amp double pole breakers with 2 - #8 wire sets to the unit. Max power draw i 75 amps. so, with a 150 amp service, you could be drawing half of the main breaker and panel amps. However, if nothing else is drawing amps, or very little amps, that would not cause you a problem. Newer homes typically have a 200 amp main services. If you were to add up the amperage of each of the breakers in your electrical panel, they would likely add up to more than the 200 amps. That is because you typically will not be drawing the full amperage thru every circuit in your home. However, you should consider what other circuits might be drawing current at the same time that you are using the tankless heater to make sure that you do not overload the main circuit breaker in the panel.
Answered by: OregonDIY
Date published: 2017-02-07
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Customer Reviews

18 kW Self-Modulating 3.5 GPM Electric Tankless Water Heater is rated 4.2 out of 5 by 128.
Rated 5 out of 5 by from Easy to install (was a direct replacement) and easy to adjust the temperature setting. Consistent... Easy to install (was a direct replacement) and easy to adjust the temperature setting. Consistent water temperature. We've only had it for a bit over a week now but I've been satisfied so far. Huge space saver over traditional water heaters and was even smaller than the tankless we replaced. We have a small house (approx 1300 sq ft) with only two people in the Mid-Atlantic area; we never run two large water-consuming appliances at the same time (ie shower and washing machine) so this item is perfect for us. Will support a shower and hand sink at the same time without a drop in water temperature.
Date published: 2016-11-22
Rated 5 out of 5 by from This product works really well and is easy to install. Yes I would recommend this to all my custo... This product works really well and is easy to install. Yes I would recommend this to all my customers and any one who needs hot water when it takes a long time for the hot water to get to the tub or the dishwasher. The water is warm and gets hotter as you use it and you can set the temp to what you want it to be. I found it saves money and is worth every cent spent on this product.
Date published: 2016-10-26
Rated 5 out of 5 by from Love it I purchased a small restored 1930's Carriage home in Florida that has 1 bath and of course a kitchen. This unit was brand new and already installed do to not having any room for a traditional hot water heater. the water would get really hot for the sinks up to 140° but the shower would only get lukewarm.. I thought it was an issue with the hot water heater but it turned out to be the Delta shower had a temperature control inside the knob that needed to be adjusted. once I adjusted the shower control to allow the knob to turn all the way, now my shower gets very hot and I can run both sinks and the shower at the same time and they all stay hot. My water and electric bill stays low.
Date published: 2016-12-03
Rated 4 out of 5 by from bought this one as my traditional water heater was slowly dying, replaced it on Oct 10 2016 First... bought this one as my traditional water heater was slowly dying, replaced it on Oct 10 2016 First day everything worked with out a hitch, day two had to reset the unit by tripping the breakers, day five unit was not working, called the company, left message they called me back the next day, they overnighted a new flow sensor, I installed the new one with out any issue and have not had am issue since. Customer service was fast, and very polite. I will see with next months FPL bill if its going to pay for itself.
Date published: 2016-10-24
Rated 5 out of 5 by from Easy to install by myself and works great. We have a 2 bathroom home with a dishwasher and washin... Easy to install by myself and works great. We have a 2 bathroom home with a dishwasher and washing machine and this unit keeps them all in hot water. I haven't gotten my latest electric bill, but am hoping for significant savings.
Date published: 2016-12-13
Rated 1 out of 5 by from Only worked for 2 months and then customer service won't respond We purchased this from Home Depot online and then had it professionally installed by a licensed plumber as required. It worked OK for about 2 months. Although the temperature would fluctuate quite a bit during a shower. Then one it stopped getting hot. I turned the temperature all of the way up and it will only get lukewarm. Tried to contact their support and have received no response. Sent an email from their web site, then called the customer service number. After spending a long time on hold I opted for the option to save a message and have a customer rep call me back. It has been a week and nobody has called me back. Customer service has been very disappointing.
Date published: 2016-03-28
Rated 5 out of 5 by from Awesome!!! This is my 2nd EcoSmart unit. I installed one in my home about a year and a half ago and saw significant savings on my electric bill, so I decided to put another in for an apartment above my garage. Can't wait to see how much more energy I'll save since I won't need to heat a 40 gallon tank all day long. Hot water on demand!!! That's the way to go.
Date published: 2017-02-03
Rated 4 out of 5 by from Excellent Easy to install, it provides continuous hot water whenever needed. Have it in a three bedroom 2 bath home and it is working great. Too soon to see savings on the electric bill but that will come
Date published: 2016-10-11
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