Marey ECO180 5.0 GPM Tankless Water Heater Open Box

  • Model: Marey
  • SKU: ECO180
Marey ECO180 5.0 GPM Tankless Water Heater Open Box

Extended Warranty Options Available

2 Year In-Home Warranty   ($27)  
3 Year In-Home Warranty   ($47)  
5 Year In-Home Warranty   ($89)  
Warranty has been added in!

In Stock
/ 25 sold
Ships Same or Next Day
If ordered by 12PM EST
  • Free Shipping.   No Sales Tax *Except TX*
  • No Hassle Returns
  • Price Match On Most Items
  • Manufacturer Direct
  • Exceptional Customer Service
  • Free Replacement Shipping
To place an order over the phone or for immediate assistance, please call (888) 978-4993. For after hours sales please call (888) 999-1522.

Open box - As brand new.   Most open box units are returns that have never been used.  Ships from the manufacturer in FL.  Includes same 5 year warranty as new units.

Current Special: We are out of this unit in open box, so it will be upgraded to a brand new unit.

Transit time for most orders: 1-3 days

Manufacturer Refurbished 100% certified by the manufacturer
Manufacturer Refurbished Guaranteed to work like new or your money back
Manufacturer Refurbished 5 year manufacturer warranty
Manufacturer Refurbished Authorized Marey dealer
Manufacturer Refurbished Free same or next day shipping


The smartest hot water solutions for the whole house.

  • Made with stainless steel cover guaranteeing long life to the product.
  • 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, making it cost-effective and environmentally friendly.
  • 5-year warranty.


- ETL approved.
- German technology.
- Patent and innovative technology.
- TPCS thermodynamic cycle system.
- Terminater of the limescale.
- Aluminium magnesium alloy casting body.
- Stainless steel aqueduct.
- Imported stainless steel.
- Insulated heat-conducting magnesium powder.
- Nickel-chromium heating element.
- Smart technology that avoids the excess temperature waste to any hot water point of use.
- The only one in the market that doesn’t get sediments.


  • Tankless Electric Water Heater
  • ETL approved
  • Compliant with Department of Energy electric tankless water heater requirements
  • Smart technology that avoids excess temperature waste
  • Adjusts to your tankless water heating needs
  • The only tankless water heater in the market which is not prone to sediment buildup
  • Compact design allows for easy installation in any home
  • German tankless water heating technology
  • Saves water and uses up to 60% less electricity than conventional tank water heaters, making it cost-effective and eco-friendly
  • Patented heating elements design ensures long lifetime
  • Excellent customer service support and 5 year warranty
  • Our electric tankless water heater uses SMART technology by only applying the power needed to heat the water to the desired temperature, maximizing energy savings

The versatile 18Kw Electric Tankless Water Heater can be used with 100 Amps allowing for it to meet any hot water demand, while still being able to self-regulate to far lower amps for less demanding usage. Stainless steel in/outlets are corrosion resistant ensuring a long lifetime of high energy efficient performance. In addition to being one of the most energy efficient electric tankless water heaters in the market, the ECO180 is also extremely safe with a single piece multi-layer heat exchange which encases the water moving inside the heating element and preventing any possible contact with the element itself.

Marey products come with a 5 year manufacturer warranty.
Used & Refurbished

Thousands of units sold with very happy customers and feedback

Used & Refurbished

Refurbished products come directly from the manufacturer, so you can be certain of the quality

Used & Refurbished

Refurbished products are restored by the manufacturer to the same rigorous standards as those set for new products

Used & Refurbished

We offer extended in-home warranties that can be longer than the manufacturer warranty for new items

Used & Refurbished

Each unit is individually tested for performance, whereas only a small subset of new units are tested

Customer Reviews

Based on 3 reviews
Martha Baker M.B. Martha B.
I sent it back to

I sent it back to the factory because it was larger than what I needed.

Richard Mills R.M. Richard M.
Tankless heater

Fast shipping, easy installation

Richard Mills R.M. Richard M.
Tankless heater

great product easy hook-up

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