0854920002046

EcoSmart

Model ECO 18

Internet #203316216

Store SKU #1000047991

Store SO SKU #1000094374

18 kW Self-Modulating 3.5 GPM Electric Tankless Water Heater

$425.00 /each
  • 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.

Frequently Bought Together

Product Overview

Homedepot Image

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

You will need Adobe® Acrobat® Reader to view PDF documents.  Download a free copy from the Adobe Web site.

Specifications

Dimensions

Details

Warranty / Certifications

More Products With These Features

Search

Customer Questions & Answers

38 Questions94 Answers

Customer Questions & Answers

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

Ask your questions. Share your answers.

 
 
Clear Search Term
 
 
Sort By:
 
6 answers

Can these units be plugged In a 240 electrical socket

This question is from 18 kW Self-Modulating 3.5 GPM Electric Tankless Water Heater
Asked by
Read all my Q&A
May 1, 2016
0points
0out of 0found this question helpful.
Was this helpful?helpful0unhelpful0

Answers (6)

Asked by
Golden, Colorado
Read all my Q&A
August 11, 2016
Answer: 
Highly unlikely. It actually requires 2 separate 40 amp 240volt services. It draws 75 amps of 240volts at peak use.
0points
0out of 0found this answer helpful.
Was this helpful?helpful0unhelpful0

Asked by
Ottawa, IL
Read all my Q&A
August 9, 2016
Answer: 
have to have two seperate 240v 40 amp circuits.
0points
0out of 0found this answer helpful.
Was this helpful?helpful0unhelpful0

Asked by
Terrebonne, Oregon
Read all my Q&A
Home Improvement Profile: DIYer
May 25, 2016
Answer: 
NO! They need to be hard wired in, and, depending on the unit that you choose, it will take more than one 240V circuit. See the chart in the specifications. The 18KW unit needs two 40 amp circuits, and so on as you go up in size.
0points
0out of 0found this answer helpful.
Was this helpful?helpful0unhelpful0

Asked by
Read all my Q&A
May 3, 2016
Answer: 
The ECO-18 requires 2 double pole 240 volt, 40 amp circuit breakers. It requires 4 breaker spaces in the electric panel. I suppose you could install 2 240 volt, 40 amp rated cords and plugs on the unit and 2 240 volt, 40 amp receptacles near the unit and then just plug it in. Just make sure both plus and receptacles are grounded.
0points
0out of 0found this answer helpful.
Was this helpful?helpful0unhelpful0

Asked by
Read all my Q&A
May 2, 2016
Answer: 
Theoretically yes, but would require 2 of them since it requires 2 240V feeds.
0points
0out of 0found this answer helpful.
Was this helpful?helpful0unhelpful0

Asked by
hilliard, florida
Read all my Q&A
Home Improvement Profile: DIYer
May 2, 2016
Answer: 
NO. They require 2runs of 8 ga. direct wiring.
+1point
1out of 1found this answer helpful.
Was this helpful?helpful1unhelpful0
 
6 answers

what causes the heating element to turn on?

This question is from 18 kW Self-Modulating 3.5 GPM Electric Tankless Water Heater
Asked by
The Villages, FL
Read all my Q&A
October 31, 2014
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?
0points
0out of 0found this question helpful.
Was this helpful?helpful0unhelpful0

Answers (6)

Asked by
Ottawa, IL
Read all my Q&A
August 9, 2016
Answer: 
There is a water flow switch inside to detect water flow.
0points
0out of 0found this answer helpful.
Was this helpful?helpful0unhelpful0

Asked by
Golden, Colorado
Read all my Q&A
March 8, 2016
Answer: 
The water flow sensor built into the unit activates the heater elements when water is turned on.
+1point
2out of 3found this answer helpful.
Was this helpful?helpful2unhelpful1

Asked by
Florida
Read all my Q&A
January 14, 2015
Answer: 
water flow sensor, senses the flow of water through unit and also works to regulate energy use.
+6points
7out of 8found this answer helpful.
Was this helpful?helpful7unhelpful1

Asked by
Terrebonne, Oregon
Read all my Q&A
Home Improvement Profile: DIYer
January 8, 2015
Answer: 
Generally speaking, tankless heaters are turned on by water flow. The exact method likely varies by manufacturer. The unit you are looking at has a flow sensor. The heating elements would be off with no flow.
+10points
11out of 12found this answer helpful.
Was this helpful?helpful11unhelpful1

Asked by
Scottsdale, AZ
Read all my Q&A
November 11, 2014
Answer: 
Water flow sensing turns it on.
+7points
8out of 9found this answer helpful.
Was this helpful?helpful8unhelpful1

Asked by
fl.
Read all my Q&A
Home Improvement Profile: DIYer
November 2, 2014
Answer: 
i believe its pressure flow only comes on when you run the hot water.
+2points
6out of 10found this answer helpful.
Was this helpful?helpful6unhelpful4
 
6 answers

Is this for a whole apartment or a single point?

This question is from 18 kW Self-Modulating 3.5 GPM Electric Tankless Water Heater
Asked by
Read all my Q&A
October 11, 2014
0points
0out of 0found this question helpful.
Was this helpful?helpful0unhelpful0

Answers (6)

Asked by
Ottawa, IL
Read all my Q&A
August 9, 2016
Answer: 
whole apartment.
0points
0out of 0found this answer helpful.
Was this helpful?helpful0unhelpful0

Asked by
Golden, Colorado
Read all my Q&A
March 8, 2016
Answer: 
I'm feeding my 3 bedroom 2 bath house with it.
+3points
4out of 5found this answer helpful.
Was this helpful?helpful4unhelpful1

Asked by
Florida
Read all my Q&A
January 14, 2015
Answer: 
whole apartment, but one should check charts provided by manufacture for effectiveness. This is based on number of taps and ambient water temps.
+3points
4out of 5found this answer helpful.
Was this helpful?helpful4unhelpful1

Asked by
Terrebonne, Oregon
Read all my Q&A
Home Improvement Profile: DIYer
November 21, 2014
Answer: 
There is a chart to help you determine what size tankless heater you need, depending on both the incoming water temperature, and the gallons of water flow demand you need - 1 shower at a time, 2 showers and a faucet at a time, etc. Check the chart. it will give you the minimum size tankless heater you need. Under "specifications" you will see what amperage the unit draws so you can determine how many new Read More
There is a chart to help you determine what size tankless heater you need, depending on both the incoming water temperature, and the gallons of water flow demand you need - 1 shower at a time, 2 showers and a faucet at a time, etc. Check the chart. it will give you the minimum size tankless heater you need. Under "specifications" you will see what amperage the unit draws so you can determine how many new 40 amp breakers you will need. Each 40 amp breaker requires #8 wire from your panel to the tankless heater. So a 27kW heater will draw 112 amps. That will require 3 - 40 amp breakers, each with #8 wire run to from the main panel to the tankless heater. You can't use the current electrical wiring that was installed for the current tank heater. Read Less
+13points
14out of 15found this answer helpful.
Was this helpful?helpful14unhelpful1

Asked by
Scottsdale, AZ
Read all my Q&A
November 11, 2014
Answer: 
It will work for the whole apartment, you just have to size it for the amount of hot water you will need at one time from their chart on the web site. The chart gives you inlet water temperature, number of faucets/shower heads running with flow rates to figure out what size you need. I put this 18KW size in my 3 bedroom,2.5 bath house where there are 2 people living.
+18points
19out of 20found this answer helpful.
Was this helpful?helpful19unhelpful1

Asked by
fl.
Read all my Q&A
October 21, 2014
Answer: 
its for whole apartment but would suggest if your to going to run more than 1 shower at a time go to next size up. will do just fine with one sink and shower. but you will need one with more water flow for more than that.
+7points
9out of 11found this answer helpful.
Was this helpful?helpful9unhelpful2
 
5 answers

do I need a plumber to install this unit or are the instructions good enough for a handy man to install it?

This question is from 18 kW Self-Modulating 3.5 GPM Electric Tankless Water Heater
Asked by
Read all my Q&A
November 18, 2014
0points
0out of 0found this question helpful.
Was this helpful?helpful0unhelpful0

Answers (5)

Asked by
hilliard, florida
Read all my Q&A
Home Improvement Profile: DIYer
May 26, 2016
Answer: 
I am a DIYer and had no problems with install. Have done several for friends, even installed one in a kitchen cabinet( after gutting and lining with fire rock for safety).
0points
0out of 0found this answer helpful.
Was this helpful?helpful0unhelpful0

Asked by
Golden, Colorado
Read all my Q&A
March 8, 2016
Answer: 
It's easy to install but the lifetime warranty is only valid if a licensed plumber installs. I chose to do it myself because plumbers are more costly than replacing the unit if it fails.
+6points
6out of 6found this answer helpful.
Was this helpful?helpful6unhelpful0

Asked by
MD
Read all my Q&A
June 29, 2015
Answer: 
Easy to install. Warranty requires plumber or electrician installation to be valid.
+11points
12out of 13found this answer helpful.
Was this helpful?helpful12unhelpful1

Asked by
Florida
Read all my Q&A
January 14, 2015
Answer: 
i recommend snake bite fittings, no plumber needed, just pipe cutter. don't forget to clean up pipe ends
+3points
8out of 13found this answer helpful.
Was this helpful?helpful8unhelpful5

Asked by
Terrebonne, Oregon
Read all my Q&A
Home Improvement Profile: DIYer
November 21, 2014
Answer: 
I don't think plumbing is the issue. With flex pipe, like is on your current tank heater, the plumbing should be a snap. The issue with electric tank heaters is the electrical service needed. A typical tank heater has 2 - 4500 watt heating elements and can run on a 30 amp breaker with #10 wire (240V). Electric tankless heaters have one or more 9000 watt heating elements, and it is likely that all of them Read More
I don't think plumbing is the issue. With flex pipe, like is on your current tank heater, the plumbing should be a snap. The issue with electric tank heaters is the electrical service needed. A typical tank heater has 2 - 4500 watt heating elements and can run on a 30 amp breaker with #10 wire (240V). Electric tankless heaters have one or more 9000 watt heating elements, and it is likely that all of them will come on at some point. Each 9000 watt element will require #8 wire and a 40 amp breaker (240V). If your electrical panel is full, then you would need to add a sub-panel for this project. At the very least, you would need to make sure that you have enough space in the main panel to add any additional 240V 40 amp breakers over and above the 30 amp breaker you will be replacing. Plus you will need to pull new, #8 wire for each breaker you are adding, from the panel to the tankless heater location. Probably best to have a licensed electrician do this, unless you are adept at wiring. Depending on your local jurisdiction, you will likely need to get an electrical permit. Read Less
+46points
47out of 48found this answer helpful.
Was this helpful?helpful47unhelpful1
2 3 »
  • 2016-08-31 T13:02:13.256-05:00
  • bvseo_lps, prod_bvqa, vn_prr_5.6
  • cp-1, bvpage1
  • co_hasquestionsanswers
  • loc_en_US, sid_203316216, prod, sort_default
2 3 »
  • bvseo_sdk, java_sdk, bvseo-3.1.1
  • CLOUD, getContent, 70ms
  • QUESTIONS, PRODUCT

Customer Reviews

Rated 4.2 out of 5 by 108 reviewers.
Rated 3.0 out of 5.0 by Okay Not please with the temperature of the water, not performing to the max. August 27, 2016
Rated 5.0 out of 5.0 by Eco Smart tankless waterheater I love my Eco Smart Tankless Waterheater. It heats up very fast and much hotter than my old Waterheater. Thank you for producing it,it's a great product. Since I live in a Condo and space is a premium I now have all that extra space. Everyone that's seen it here where I live can't wait till their Waterheater wears out so they can get one of yours. Thanks again, Judi August 18, 2016
Rated 5.0 out of 5.0 by Tankless Hot Water Heater So far been very pleased with my EcoSmart 18k 3.5GPM Electric Tankless Hot Water Heater. So far we have not run out of hot water. August 16, 2016
Rated 5.0 out of 5.0 by Greatest Tankess Heater This is a replacement tankless heater. It heats better, looks better, and made better. Like the digital water temp and the ease of setting it. August 9, 2016
Rated 5.0 out of 5.0 by Great product for good price The water heater was easy to install. Do need 2- 40amp 220v circuits for this unit. Need to make sure your home electrical panel has enough space and capabilities. Unit is easy to use and doesn't take up much space. Nice product!! July 29, 2016
Rated 2.0 out of 5.0 by Worked great for eight weeks Just today went to use hot water in the kitchen and the unit is no longer working. Powers fine, breakers are fine, digital display lights up meaning it's getting power. No hot water is happening. This was installed eight weeks ago and worked great until today. July 27, 2016
Rated 5.0 out of 5.0 by EcoSmart 18 kW Easy to install works great saves money and space should be used in every new home. July 12, 2016
Rated 4.0 out of 5.0 by returned returned cost of electrical work hundreds more water softener hundreds more 3x the cost of unit July 5, 2016
  • 2016-08-31 T12:41:26.101-05:00
  • bvseo_lps, prod_bvrr, vn_prr_5.6
  • cp-1, bvpage1
  • co_hasreviews, tv_108, tr_108
  • loc_en_US, sid_203316216, prod, sort_default
2 3 4 5 >>
  • bvseo_sdk, java_sdk, bvseo-3.1.1
  • CLOUD, getContent, 38ms
  • REVIEWS, PRODUCT