• Description
  • Specification
  • Sizing & Installation
  • Replacement Parts

ECO 36 | 36kW Electric Tankless Water Heater

Ideal for a large single family home with a busy family with multiple applications running simultaneously


The ECO 36 is the most powerful model from our full line of tankless water heaters, with the capacity to handle a large single-family home with the need to run hot water simultaneously from multiple applications, even in colder climates

The ECO 36 can run four showers and two sinks simultaneously without running out of hot water. Use the EcoSmart interactive sizing guide to find if this model is ideal for you.

ECO 36 Features:

  • Savings of up to 50% on water heating costs
  • The most advanced, self-modulating technology available, meaning the ECO 36 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 36

Voltage 240
Phase Single
KW 36 KW
Elements 4 x 9 KW @ 240
Amperage Draw 150 Amps
Required Breaker 4 x 40 DP
Required Wire 4 x 8 AWG
Electrical Panel 300 Amps
HZ 50/60
Pipes fittings 3/4" NPT
Dimensions (in.) 17"H x 21"W x 3.75"D
Weight 17.4 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

HE 90240

HE 90240 - $41.07

Heating Element 9 KW @ 240V

Compatible with:

ECO 18, ECO 27 & ECO 36


TRC QC 1HEXLRG - $31.12

Triac 1st Heating Element

Compatible with:

ECO 36


TRC QC 2HEXLRG - $31.12

Triac 2nd Heating Element

Compatible with:

ECO 36


TRC QC 3HEXLRG - $31.12

Triac 3rd Heating Element

Compatible with:

ECO 36


TRC QC 4HEXLRG - $31.12

Triac 4th Heating Element

Compatible with:

ECO 36

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