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  • Description
  • Specification
  • Sizing & Installation
  • Replacement Parts

ECO 27 | 27kW Electric Tankless Water Heater

Ideal for a large single family home with a busy family.


The ECO 27 is one of the most powerful models from our full line of tankless water heaters, with the capacity to handle a large single-family home and is perfect for a large Roman-style and Jacuzzi tub or high demand of hot water between multiple applications, even in colder climates

In warm climates, the ECO 27 can run four showers and a sink simultaneously without running out of hot water. Use the EcoSmart interactive sizing guide to find out which model is ideal for you.

ECO 27 Features:

  • Savings of up to 50% on water heating costs
  • The most advanced, self-modulating technology available, meaning the ECO 27 will adjust energy usage 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 27

Voltage 240
Phase Single
KW 27 KW
Elements 3 x 9 KW @ 240
Amperage Draw 112.5 Amps
Required Breaker 3 x 40 DP
Required Wire 3 x 8 AWG
Electrical Panel 200 Amps
HZ 50/60
Pipes fittings 3/4" NPT
Dimensions (in.) 17"H x 17"W x 3.75"D
Weight 13.75 lbs.
Exchanger Copper
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 QC MEDLRG - $52.11

Control Board

Compatible with:

ECO 18, ECO 24, ECO 27 & ECO 36


ENC FLRG - $33.12

Front Enclosure

Compatible with:

ECO 24 & ECO 27


FSA QC MEDLRG - $18.84

Flow Sensor Assembly

Compatible with:

ECO 18, ECO 24, ECO 27 & ECO 36

HE 90240

HE 90240 - $41.07

Heating Element 9 KW @ 240V

Compatible with:

ECO 18, ECO 27 & ECO 36


TRC QC 1HE - $31.12

Triac 1st Heating Element

Compatible with:

ECO 18, ECO 24 & ECO 27


TRC QC 2HE - $31.12

Triac 2nd Heating Element

Compatible with:

ECO 18, ECO 24 & ECO 27


TRC QC 3HE - $31.12

Triac 3rd Heating Element

Compatible with:

ECO 24 & ECO 27

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