0854920002046

EcoSmart

Model # ECO 18

Internet # 203316216

Store SKU # 1000047991

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.

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PRODUCT OVERVIEW

Model # ECO 18

Internet # 203316216

Store SKU # 1000047991

Store SO SKU # 1000094374

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
  • Tankless Electric Buying Guide

    Ecosmart Tankless Water Heater

Info & Guides

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SPECIFICATIONS

Dimensions
Product Depth (in.) 
14 
Product Height (in.) 
18 
Product Width (in.) 
Water Connection Size (in.) 
3/4 In. NPT 
Details
Amperage (amps) 
75 
Electric Product Type 
Commercial & Residential 
Finish Family 
White 
Flow Rate @ 35 F Rise (gallons/min) 
3.51 
Flow Rate @ 45 F Rise (gallons/min) 
2.73 
Flow Rate @ 55 F Rise (gallons/min) 
2.24 
Flow Rate @ 65 F Rise (gallons/min) 
1.89 
Fuel Type 
Electric 
Indoor/Outdoor 
Indoor 
Maximum Temperature (F) 
140 
Minimum Activation Rate (gpm) 
.25 
Minimum Temperature (F) 
80 
Point-Of-Use 
No 
Product Weight (lb.) 
11 lb 
Residential/Commercial/industrial Use 
Residential, commercial or industrial 
Returnable 
90-Day 
Water Connection Location 
Bottom 
Water Heater Features 
Wall Mountable 
Wattage (watts) 
18000 
Warranty / Certifications
Certifications and Listings 
1-UL Listed,CSA Listed,ETL Listed 
ENERGY STAR Certified 
No 
Labor Warranty 
No Warranty 
Part Warranty 
Lifetime 

MORE PRODUCTS WITH THESE FEATURES

Flow Rate @ 45 F Rise (gallons/min): 2.5 - 3
Price: $400 - $500
Brand: EcoSmart
Water Heater Features: Wall Mountable
Review Rating: 4 & Up
Indoor/Outdoor: Indoor
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34 Questions72 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

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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
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November 18, 2014
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Asked by
hilliard, florida
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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).
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Asked by
Golden, Colorado
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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.
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Asked by
MD
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June 29, 2015
Answer: 
Easy to install. Warranty requires plumber or electrician installation to be valid.
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Asked by
Florida
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January 14, 2015
Answer: 
i recommend snake bite fittings, no plumber needed, just pipe cutter. don't forget to clean up pipe ends
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Asked by
Terrebonne, Oregon
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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
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5 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
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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?
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Asked by
Golden, Colorado
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March 8, 2016
Answer: 
The water flow sensor built into the unit activates the heater elements when water is turned on.
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Asked by
Florida
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January 14, 2015
Answer: 
water flow sensor, senses the flow of water through unit and also works to regulate energy use.
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Asked by
Terrebonne, Oregon
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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.
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Asked by
Scottsdale, AZ
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November 11, 2014
Answer: 
Water flow sensing turns it on.
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Asked by
fl.
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Home Improvement Profile: DIYer
November 2, 2014
Answer: 
i believe its pressure flow only comes on when you run the hot water.
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5 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
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October 11, 2014
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Asked by
Golden, Colorado
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March 8, 2016
Answer: 
I'm feeding my 3 bedroom 2 bath house with it.
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Asked by
Florida
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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.
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Asked by
Terrebonne, Oregon
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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
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Asked by
Scottsdale, AZ
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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.
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Asked by
fl.
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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.
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4 answers

Will this work with well water?

This question is from 18 kW Self-Modulating 3.5 GPM Electric Tankless Water Heater
Asked by
Blue Ridge, GA
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May 23, 2016
Our water source is a well, and I see it has copper internal parts. Well water is generally pretty hard on copper, will this be okay?
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Asked by
Golden, Colorado
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May 29, 2016
Answer: 
As long as you install it with valves on the inlet and outlet side you can flush it every 6 months with white vinegar to remove the deposits.
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Asked by
hilliard, florida
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Home Improvement Profile: DIYer
May 26, 2016
Answer: 
This system works excellent with well water.
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Asked by
Terrebonne, Oregon
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Home Improvement Profile: DIYer
May 25, 2016
Answer: 
You could always have your water tested to see if it would be corrosive to copper, but other than it being acidic (I'm not a chemist, but would think it would need to be acidic enough for you to notice, before it would corrode the copper in the unit). These units have heater elements similar to a normal tank hot water heater, and they might also corrode, but if you are currently using a standard hot Read More
You could always have your water tested to see if it would be corrosive to copper, but other than it being acidic (I'm not a chemist, but would think it would need to be acidic enough for you to notice, before it would corrode the copper in the unit). These units have heater elements similar to a normal tank hot water heater, and they might also corrode, but if you are currently using a standard hot water heater, and have not had element problems, then you should not have any with a tankless heater. The only other consideration would be debris. If your well water has any debris, sand, etc., you might want to add a filter to your system. Other than that, I don't see any reason that a tankless heater would not work with well water. Keep in mind that you will need additional wiring to use a tankless heater, so check with you local electrician first to see what is needed and the cost for the additional wiring. Read Less
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Asked by
Anonymous
South Florida
Home Improvement Profile: DIYer
May 25, 2016
Answer: 
I would check with your city as well as the company that makes the units. If you use well water it might void the warranty. I have well water for my sprinkler system and it turns everything that the water touches a rust color. It does not say what part of the country you are from but down here in Florida well water is mostly used for the grass.
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CUSTOMER REVIEWS

Rated 4.2 out of 5 by 100 reviewers.
Rated 4.0 out of 5.0 by Good purchase I've only had it for a couple of months but seems to work very good. Heats the water instantly and can adjust temperature as needed. The small size made it easy to hang on the wall for installation. Time will tell about its reliability but so far so good. As an old school plumber, it kind of amazing that something this small can put out endless hot water. June 21, 2016
Rated 5.0 out of 5.0 by Works great and easy replacement for old water heater. Easy to install and great replacement for old water heater for kitchen/utility room area of my house. Provides hot water at the set temp. I like that you can replace the heating elements that can be found at local stores. Looks easy to troubleshoot if any problems occur. Eco-Smart web site has all replacement parts for reasonable prices. Also, I believe of all the other brands that I looked at before purchasing this one, this is the only brand that adjusts how many heating elements come on by how much water flow thus saving power consumption. Considering replacing other old water heater for bathrooms with larger Eco-Smart. May 3, 2016
Rated 1.0 out of 5.0 by 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. March 28, 2016
Rated 5.0 out of 5.0 by finally we have gotten a great tankless water heater - wooooo pig soooooie I can honestly say that this electrical tankless water heater in the best one on the market with the electronic temperature control and use of standard heater elements. this has been an excellent water heater so far. I installed it myself after doing some research on what was required to maintain the unit without having it clog up with lime deposits and burning out the heating elements. I made a diagram of the piping for a pre-filter and a bypass valve setup to flush the unit with vinegar to get rid of the deposits. my location had to be in a utility closet under the stairs in the basement that was very tight. it was adjacent to the electrical breaker load center also, but that made the electrical connections closer to the heater. beware that the factory does not provide a ground location on the housing. they only provide a bus bar for the neutral to the heater body. the knock out for the electrical cables was only for a 3/4" connector which is to small for 2 each #8/3-g cables. to adapt for this I installed a 1" condulet elbow with a 3/4" reducer into the box which gave me a 1" cable connection into the elbow, allowing me to pull the cables into the elbow, strip the outer insulation from the individual conductors and then pull them into the heater to connect them. I then joined the neutrals and the grounds in pairs from each feed and attached them to the 2 lugs of the bus bar. my wife said this is the first time she has had hot water to the end of a shower in the 11 years we have lived in this house. by adjusting in flow to the heater I can limit the gpm to what the unit is capable of heating per minute and still maintain the set temperature. it takes a little time to adjust the temperature low enough not to scald at the closest faucet and still hot enough at the furthest one. the only limit so far has been to open the tub faucet just enough to fill the tub slowly so you do not outrun the heater. I will soon get a new tub spout that limits the gpm to correct this. the instructions that came with the heater were very minimal. the factory downloads were not much better. by doing my own research and making a diagram ahead of time I was able to minimize errors in piping and location of all the components. I debated whether to install the unit by using licensed plumbers and electricians, but finally decided that the cost of 1 to 2 thousand dollars was enough to replace the unit 3 times. the manufacturer states in the literature that it is guaranteed for life in installed by professionals but it is cost prohibitive. besides most of the parts are available at very reasonable cost from the factory. most of the pros are not familiar with instantaneous tankless heaters and with the amount of time to convert from a tank style heater they can't make any money without charging more than it is worth to the home owner. that said it is not for amateurs to install - you have to be an accomplished do it yourselfer. all in all I am very satisfied with the water heater. December 13, 2015
Rated 5.0 out of 5.0 by Great Purchase! Electrical and plumbing installation was a breeze. So far, everything is running good. November 23, 2015
Rated 5.0 out of 5.0 by Works for me! We just replaced our old hot water tank at our home in St. Pete FL with this unit . Two years ago we did the same thing at a summer home in Virginia but, because the water up there is from a deep well and very cold, we used the beefier, three pole model up there. Installation is simple and straightforward, it takes up virtually no space hanging on the wall and it works like a champ. It takes maybe an extra 20 seconds for warm water to get to the various spigots and another 20 seconds for it to be truly hot. But then you can shower, do laundry, dishwasher, whatever, for as long as you need it. This sized unit is great for 2-3 people in Florida. I ran the dishwasher this morning while two of us took showers back to back and it produced a steady flow of hot water with no pressure drop. Two words of caution: Get a scale reducing, inline filter. They're cheap and they will extend the life of the unit. In Virginia we have soft water but more sediment from the well so we use a sediment filter instead. Make sure you check your panel for the space and amps needed for the breakers. They need heavy duty dual pole breakers to work. Both units do the job and we are satisfied. April 26, 2016
Rated 1.0 out of 5.0 by Do not recommend this product The unit was very easy to install since all the wiring and plumbing was already in place for a tankless water heater. We allocated two 40 amp breakers for the product, per requirements. The unit worked for a couple of days, then the element burned up. We had to have the unit removed, box it up, and return it to the store, where they had difficulties giving us credit for the unit. We are without hot water in our search for a better unit! March 29, 2016
Rated 5.0 out of 5.0 by Eco smart tankless water heater Loving this eco smart system. Very efficient and a space saver !!!! April 19, 2016
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