• Description
  • Specification
  • Sizing & Installation
  • Replacement Parts

ECO 11 | 13kW Electric Tankless Water Heater

Ideal for a small apartment with one and a half bathrooms in warm climates


Ideal for a small apartment, the ECO 11 can be used for multiple or single applications depending on your climate. The ECO 11 can provide hot water for one shower, or two sinks in warm climates. Use the EcoSmart interactive sizing guide to find out if this model is ideal for you

ECO 11 Features:

  • Savings of up to 50% on water heating costs
  • The most advanced, self-modulating technology available, meaning the ECO 11 will adjust how much energy needs to be input based on how much hot water is needed
  • Stylish and advanced design that is pleasing to the eye
  • Digital temperature control in 1-degree increments allows control of hot water
  • Copper and stainless components designed for efficiency, durability and easy replacement
  • Compact size saves valuable storage space

ECO 11

Voltage 240
Phase Single
KW 13.6 kW
Elements 2 x 5.5 KW @ 220 V
Amperage Draw 57 Amps
Required Breaker 60 DP
Required Wire 6 AWG
Electrical Panel 125 Amps
HZ 50/60
Pipes fittings 1/2" CF
Dimensions (in.) 11.5"H x 8"W x 3.75"D
Weight 6.5 lbs.
Exchanger Stainless Steel
Protection Thermal Auto
Temperature Control Digital
Activation flow .25 GPM
Energy Efficiency 99.8 %
Certification: ETL Listed to UL 499 & CSA
Warranty Lifetime*


Installation of your EcoSmart tankless water heater requires certain wiring and electrical specifications. To ensure maximum performance and to maintain your warranty, it is recommended that you have a licensed professional install the unit. The sizing chart below is based off a 240 volt electrical service. If you do not have 240 volts or are unaware of your electrical service please contact our customer service team at 877-474-6473 for additional product sizing support.

Click here to download the installation manual


CB NF SML - $41.27

Control Board

Compatible with:

ECO 8 & ECO 11


ENC FSML - $25.64

Front Enclosure

Compatible with:

ECO 8 & ECO 11


FSA NFSML - $15.12

Flow Sensor Assembly

Compatible with:

ECO 8 & ECO 11

HE 55220

HE 55220 - $33.78

Heating Element 5.5 KW @ 220V

Compatible with:

POU 6 & ECO 11


PSC 6 - $30.88

Power Supply Cord #6

Compatible with:

ECO 11


TRC 1HESML - $27.43

Triac 1st Heating Element

Compatible with:

ECO 8 & ECO 11


TRC 2HESML - $27.43

Triac 2nd Heating Element

Compatible with:

ECO 11

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