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Marey ECO035 Electric Water Heater 110 Volt 2.5 GPM


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This Item has been discontinued from the Marey International, LLC line up of electric tankless water heaters. 

The corresponding unit is the Power Pac 110.


Marey ECO035

Best Electric Tankless Water Heater Instant Point of Use 2.5 Max Flow Rate 3.5 kW

The perfect solution for your out of the way hot water needs.  This single point of use, low volume tankless water heater is changing the game. 


IMPORTANT: This unit is designed specifically for locations with the incoming ground water temperatures of 70° or higher.  Please check the included water temp map.  If you are located in the Orange/Red areas in the most southern warmer climate states or Caribbean, than this point of use water heater is for you. 


If you are located in other areas, send me a message with your order as to what your installation plans for this unit are.  It will save us both time of having to message back and forth to make sure this unit will work for your needs.

If you are located elsewhere, Green/Blues areas, please check our other products that will be more suitable for your needs.  

If you are uncertain about which unit is the best fit for your needs, contact us with your specifics and we will be happy to guide you to the correct unit.


This unit can be installed in the Upward or Downward position, making it more versatile than other points of use tankless water heaters.  It can be mounted above or below the sink, right next to your point of use. 

The attractive design makes one wonder "why buy ugly", when you can have a highly functional, efficient, ETL Rated, One Point of Use, 110/120 volt, 40 Amp tankless water heater.  

This Mini tankless electric water heater differs from a conventional storage type mini water heaters.  It doesn't store hot water.  Instead, water is heated instantaneously as it flows through the unit.  The powerful heating elements are activated by a flow sensor as water is drawn from a hot water faucet connected to the appliance. 

Due to the absence of stand-by hot water, the mini has a greater energy efficiency than storage type water heaters.  The units are build with a multi-safety devices and will continuously supply hot water as long as the faucet is open.


  1. Tankless, instantaneous heating for on demand hot water, No Pre-heating.  No stand-by heat loss making it very energy-saving.
  2. High strength ABS splash proof casing, stainless steel heating element.
  3. Compact appearance and unlimited supply of hot water.
  4. Easy installation, heater can be installed above or under sink.
  5. Easy operation, the heater provides hot water with constant temperature.
  6. Micro-computer control, Adaptive patent heating technology. Water is completely separated from electricity by multi-layers of composite nano insulation material. 
  7. Over-heat protection: when the outlet water temperature reaches or is over 63°C / 145°F, the appliance will avoid scalding and will start to work automatically after temperature drops to a lower acceptable temperature.  
  8. There is a built-in pressure relief valve at the outlet to prevent explosion due to over pressurizing.
  9. ETL Rated
These units use SMART technology, which means that the units read the incoming water temperature and the flow rate of the fixture being used and applies only the power necessary to heat the water to your desired set point.  This allows the unit to be very efficient and not waste power by only heating the water that is being used. 
  • General Use
    The Mini tankless electric water heater can be used for hand washing, low demand, or kitchen applications.
  • This unit is designed specifically for locations with the incoming ground water temperatures of 70° or higher.
  • Mounting the unit
    This unit can be installed above or under the sink and must be mounted in a VERTICAL position near the water fittings (no more than 6 foot away). It can be mounted Upward or Downward making it one of the most versatile, point of use unit on the market today.

Why Marey Tankless Water Heaters? Because Marey has designed and manufactured tankless water heater since 1955.
Why Marey? Because this unit is one of the best point of use water heaters on the market.
Why Marey? Because we feel that everyone should have access to hot water and be able to cut their energy consumption at the same time.
SO, If you want a good quality tankless water heater with a 5 year all parts warranty, buy a Marey from us.

*Free Return Shipping on Manufacturer defects within 30 days of purchase

Tankless ** On-Demand ** Point of Use ** Hot Water Heater

The convenience of hot water for one location with just the turn of a faucet!

Marey ECO035 110/120 volt  electric water heater can provide instant on demand hot water when ever you need it. Works great for any single point-of-use application where you need hot water at a small volume.

What's in the Box?

  • The ECO035 unit
  • Mounting Bracket/ Case
  • Rubber gasket and screw
  • Operation and Installation instructions
  • Cable and Screw Set
  • Non terminated power cord/cable 

Not in the box but most certainly included: Marey's Comprehensive five (5) year all parts warranty. 
Oh and the price isn't bad either.

Bringing you the best affordable tankless water heaters on eBay.
We take our business very serious and appreciate your business.
  We strive to provide you with excellent customer service and post sales assistance.

If you need help in determining which size unit is right for you.

Contact us and we will more than glad to assist you.

Get Yours NOW!!! 

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.

This water heater is an excellent choice for
Point of Use applications.

Please check the Technical Specifications for electrical requirements for this unit.  

Requires a dedicated line with a 40 amp
circuit breaker.



This image is only a representation to illustrate how electric tankless water heater work

Where does your money go?


Item Description


  • Significant water, electricity and space saving.
  • Requires very low water pressure to activate.
  • This tankless water heater is designed for areas with high incoming water temperature. Due to the heating power being reduced to conserve energy, it is recommended for the Caribbean or most southern states of the US.
  • 5 year all parts warranty.




Marey since 1955






for the Marey Heater Corp.


You may cancel your order before we place the shipping instructions with the warehouse. Normally we will send you a "Thank You" message through eBay informing you that we are placing the order. If you need to cancel you must respond to that message and request the cancellation. Once the order has been placed, paid for and shipping directions given to the warehouse your order can not be cancelled.

Technical Specifications





Contact a professional for you installation questions.



The video for the ECO035 has not been released yet. 
This YouTube Video is for basic reference only and does not depict the Marey ECO035 unit.


  • Voltage: 110/120V
  • Power: 3.5kW
  • Requires a 40A Circuit Breaker
  • Max. Amperage: 29.2A
  • Recommended Wire Size: 10 AWG
  • Min. Water Flow to Activate the Unit: 0.40 GPM - 1.8 L/min
  • Max. Water Flow Rate: 2.5 GPM - 9.5 L/min
  • Water Pressure: 5 PSI
  • Water Connections: 1/2" NPT
  • Weight: 3.31 lbs
  • Dimensions: 6.3" X 7.8"X 3.5"


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  • FREE Shipping to U.S. Mainland addresses only.
  • We do not offer free shipping to Alaska or Hawaii, however we do ship to those locations.
  • We do offer International Shipping.
  • When product has been paid for, we will submit the order to be processed and shipped within 24 hours. Weekends and holidays are excluded. Shipping time may vary due to your requested delivery location.
  • Your shipment will originate from a warehouse nearest to your location if possible. Most items are shipped FedEx, USPS and UPS.
  • You will receive a shipping update email containing a tracking number.
  • If your package arrives damaged, refuse the shipment and contact us. If the shipping company has left before you realize the package is damaged, contact us immediately. Concealed damages must be reported to the carrier within 24 hours of receipt.
  • All shipping and handling cost are non-refundable. If buyer provides incorrect address or refuses delivery, the original actual shipping cost will be deducted from any monies refunded.

30 Day Returns

To help us expedite your return please follow these instructions:

  • Contact us in advance for a RMA number (Return Merchandise Authorization)
  • Follow the detailed return instructions that we provide to you, which include the RMA# and shipping address to the Marey Customer Service Center in Texas.
  • You will then receive your refund after a Marey service technician inspects the returned product and has issued a credit memo.
  • Buyer is responsible for all shipping costs associated with the 30 day return, plus all returns are subject up to a 20% restocking fee.
  • Refunds will not be issued on products that have been broken or damaged!
  • Product defects are covered by Marey's 5 year Limited Warranty as verified by the manufacturer.
  • Model: ECO035
  • Shipping Weight: 6lbs
  • 0 Units in Stock
  • Manufactured by: Marey

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This product was added to our catalog on Sunday 03 April, 2016.

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