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Marey ECO150 Tankless Water Heater 3.5 GPM 14.6kW


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Electric Tankless Best On Demand Marey ECO150 Water Heater 3.5 GPM 220V 14.6kW

Make your dollars stretch further all year long. Marey tankless water heaters save energy and money!

The Marey ECO150 is their newest ETL approved medium sized electric tankless water heater.  The Marey ECO150 14.6kW unit is ideal for up to two simultaneous points of use increasing incoming water temperature up to 29°F at a 3.5GPM water flow rate.

Please consult temperature map for suggested points-of-use according to geographical area.

This unit is capable of providing temperature rise of 29°at 3.5 GPM and 68° at 1.5 GPM.

For the full 3.5 GPM, this unit is suggested for warmer climate locations with higher incoming water temperatures.

The ETL & NSF rating allows for licensed installers to install in the U.S.A and Canada. This model now has a digital control panel to display the out going water temperature. It also has a new and improved heating element.

Comes with the Marey 5 year all parts warranty.

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Marey International, LLC.

For the best service, buy from a Marey Dealer!

Bringing you the best affordable tankless and mini tank water heaters.
We take our business very serious and appreciate your business.
We strive to provide you with excellent customer service and post sales assistance.
If this unit is not what you are searching for, contact us and we will more than happy to assist you.



Smart Technology: Self modulated unit, that regulates the amount of energy used by the heater.

  • ETL approved
  • Micro-computer control
  • Digital operation panel with temperature set and output water degree display
  • Conversion between degree Fahrenheit and degree Celsius
  • Tankless on demand for instantaneous hot water and no pre-heating
  • Automatically turns on and off
  • No stand-by heating loss; energy-saving
  • Dry heating thermal shut-off
  • Malfunction sensor shut-off
  • Electrical creepage automatic shut-off
  • Over temperature protection
  • Stainless steel cover
  • Adjusts to your needs: you can set up your desired output water temperature!
  • Compact and powerful.
  • Saves water and up to 60% less electricity than conventional tank water heater
  • Cost-effective and environmentally friendly
  • 5 years warranty.
For Marey YouTube Videos on Marey Tankless Water Heaters and for Installation and Trouble Shooting follow the links below.



   Please make sure you check out the Temperature Map and the Flow Rate Chart to determine which heater is right for you. Follow the links below to download the PDF files to your computer.

Item Description

The smartest hot water solutions for the whole house.

The MAREY ECO series tankless water heaters are the only ones in the market to include a German-designed, patented heating element with a stainless steel water channel. This high quality component is corrosion resistant and reduces hard water build up from chlorine and calcium.

Marey ECO150 units use SMART heater technology. Easy management and simple adjustments on a LCD Panel allows you to program the exact desired water temperature thereby optimizing energy consumption.

Self-modulation of the water temperature assist in the amount of energy used by the heater, thus providing more efficient heating than the old standard type of heating where the heating element is on or off, giving you more consistent temperatures, while saving you money.

Flow switch activation mechanism allows the unit to produce constant temperatures with as little as 0.5GPM / 5PSI.




This unit is in compliance with DOE regulations, 10 CFR 430 .32 (d), which determines the amended energy conservation standards for residential water heaters.

  • Energy Factor > 0.82 (for gas models) and Energy Factor> 0.93 (for electric models)


This ECO 150 Electric unit has a Energy Factor Rate: 0.97



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This image is only a representation to illustrate how electric tankless water heater work
Where does your money go?

The Sediment Pre-Filter and Isolation Valve Kit images below are for visual reference only.
Not included with water heater and must be purchased separately.

It is recommended that an inexpensive pre-sediment filter be install for your Marey tankless water heater. This will help capture debris or particles that would interfere with the operation and longevity of your unit. We suggest that you flush your Marey Tankless water heater at least once a year with white vinegar. There are numerous Youtube videos that demonstrate the procedure. By installing an isolation valve kit to your Marey tankless water heater this makes the process much simpler.

 Technical Specifications

Here are the Specification concerning the Marey ECO150 Digital Panel Electric Water Heater.

  Marey ECO150


This video is for the ECO110, but the ECO150 installs and adjusts the same way. 

All sales are final 30 days from purchase date.

  • Model: ECO150
  • Shipping Weight: 12lbs
  • 10 Units in Stock
  • Manufactured by: Marey

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This product was added to our catalog on Sunday 27 August, 2017.

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