EcoSmart ECO 11 Review


EcoSmart ECO 11 is amongst the most popular tankless electric water heaters currently available in the market. There are numerous features that make this heater exclusive such as the highly advanced self-modulating technology that helps in cutting energy costs to up to 60%. It is equipped with digital temperature control feature that offers 1-degree increment and provides the users full control over the water temperature. This is really a Smart heater that can be termed as perfect for the entire family especially for regions where temperature is above 67 degree F. It can heat up to 2 gallon/min and at a time you can run a shower and sink with 1.5 gpm flow at 105 degree F output setting. Thus, you may use it as a Point of Use application for sinks in very cold climatic conditions.

The Pros & Cons of the EcoSmart ECO 11


  • It comes with a lifetime warranty for domestic usage
  • Reduces water heating costs up to 60% with its advanced self-modulating technology
  • Compact size allows you to save at least 12 cubic feet of space over comparable units, making it an ideal choice for small homes and condos
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    Low price makes it an economical choice


  • Installation can be tricky for those having little or no familiarity with plumbing and electrical fittings
  • You need to install it correctly and make sure the distance between point of use and the heater is minimized and/or well insulated to maintain water temperature
  • Less efficient in extremely cold weather

Installation and Specifications

The ECO 11 is very easy to install through a DIY approach since the unit comes with a thoroughly drafted user manual explaining the mounting procedure in detail. To mount the heater you will require a 125 amp electrical panel along with (1) 60 amp double pole breaker attached to (1) set of #6 awg wire. For plumbing connection you will need 1/2inch compression fitting and optionally you can go for 1/2inch NPT adapter, which are included in the package.


Assembled Depth9.75"
Assembled Height12"
Assembled Width3.75"
Product Depth9.75"
Product Height12"
Product Width3.75"
Water Connection Size1/2 In. NPT adapter included
Amperage (amps)57
Electric Product TypeCommercial & Residential
Finish FamilyWhite
Flow Rate @ 35 F Rise (gallons/min)2.14 gal (US)/min
Flow Rate @ 45 F Rise (gallons/min)1.66 gal
Fuel TypeElectric
Maximum Temperature (F)140
Minimum Activation Rate (gpm)0.25
Minimum Temperature (F)80
Product Weight (lb.)7 lb
Residential/Commercial/industrial UseResidential, commercial or industrial
ModelEcoSmart ECO 11
Voltage (volts)110
Water Connection LocationSide
Water Heater FeaturesOverheat Protection,Wall Mountable
Wattage (watts)11000

Common Problems

As is the case with all tankless water heaters, ECO11 also offers fluctuations in flow rate and temperatures. Therefore, if it is used in very cold weather where temperature is set at the highest then water turnover will be limited in terms of gallons per minute in comparison to the efficiency it offers in warmer weather conditions. However, if you have sized it appropriately then you can enjoy endless hot water supply without worrying about high energy consumption. You need to evaluate the right size of this heater before making the purchase considering your electrical requirements and frequency of hot water demand as well as family size.


This is a good buy for a single person living alone and even for a student with a one-bathroom apartment. It does not work efficiently for families who need more hot water flow in their homes. If used properly, it can save up to 60% on your energy bill. Also, considering its compact size, it can save you up to 12 cubic feet of space.

You can buy the EcoSmart ECO 11 on Amazon.

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