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Model #ECO 18

Store SKU #1000047991

ECO 18 Tankless Electric Water Heater 18 kW 240 V

$425.00
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$undefined.00 /mo* suggested payments with months* financingApply Now
  • Share the warmth with endless hot water for the whole home
  • Water heater requires 2 x 40 AMP double pole breakers
  • Same-day installation available. Call 1-855-400-2552
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Product Details

EcoSmart ECO 18 is an 18-kilowatt tankless electric water heater ideal for providing hot water for apartments, condominiums, townhomes and other whole home applications. It can provide between 1.8 and 4.3 gallons-per-minute depending on the inlet water temperature. To select the best solution for your hot water needs, please refer to the sizing guide. With EcoSmart you will be happier knowing the warm water you expect is available endlessly, consistently, and on-demand, allowing you to reduce your water and energy waste. Now that feels warm all over! EcoSmart - Sharing the Warmth.
  • Endless hot water with consistent temperature
  • Save Space - Compact size saves valuable storage space
  • Save Energy - Patented self-modulating technology adjusts energy based on hot water needs
  • Save Time - No venting, unit can be installed directly at the point-of-use
  • Save Money - Save up to 50% on water heating bills according to the Department of Energy
  • Digital thermostatic temperature control in 1-degree increments
  • Temperature range of 80-140°F (add in C)
  • Durable stainless steel heating elements, Limited lifetime warranty
  • Before purchase and installation, please verify that you have the proper electrical requirements for your chosen heater
  • ETL Listed to UL-499 and CAN/CSA-C22.2 No. 64
  • Selection guide
  • Other models available
  • Check out our buying guide on water heaters
  • What tankless water heater is right for you?
  • Click here for more information on Electronic Recycling Programs
  • Return Policy
  • California residents
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Specifications

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Questions & Answers

751Questions
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Q:I have a eco but water comes out too fast not heating unless I turn faucet way down. Is there a reducer. Also have high calcium water. Is there a filter for this?
by|Nov 14, 2022
0 Answer
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Q:Does this work on European electric system 220 volts 50 hertz?
by|Nov 7, 2022
0 Answer
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Q:Where was the ecosmart manufactured?
by|Nov 5, 2022
1 Answer
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A:  Ecosmart is a Rheem product. Rheem is based in Atlanta, with manufacturing plants in Fort Smith, Montgomery, Ala.; Oxnard, Calif.; and Eagan, Minn.

by|Dec 6, 2022
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    Q:What size of eco smart electric water heater should I purchase for a home with two bathrooms and kitchen ?
    by|Nov 3, 2022
    2 Answers
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    A:  I have the same 2 bath large kitchen. Big family. The Eco 27 has always been relatively just what it was designed for. Works great.

    by|Nov 7, 2022

      A:  Eco 27 depends on simultanias use and incoming water temp.

      by|Nov 6, 2022
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        Customer Reviews

        4.2 out of 5
        (1,650)
        • 4.2
          out of 1,650 reviews
        • 77%recommend this product
        Filter by:
        Showing 1-10 of 1,650 reviews
        Happy Customer
        EcoSmart 27 was easy to install and works well. I had an 80 gallon tank that failed. The water temp is great and reaches the far end of the house at temperature in less than 45 seconds which is about the same as the old tank system.
        by
        • Verified Purchase
        • Recommended
        Good Product
        the o ly problem is my tub has 1/2 pipe and heater errors out. I fixed this by throttling input to heater. used pec pipe. easy install. lots of continuous hot water w/o constant temperature adjustment. Electric was 3 40 Amp double pole breakers using 8 awg wire. works great
        by
          • Recommended
          EcoSmart makes a good tankless water heater. The EcoSmart 18...
          EcoSmart makes a good tankless water heater. The EcoSmart 18 supplies my 1400 square foot home with plenty of hot water. I also purchased a small EcoSmart 8 which my Westinghouse 9500 watt generator will accommodate in case of a electrical outage. With it I can take hot showers and have hot water for washing dishes in case I need it. I purchased the two tankless water heater’s and the Westinghouse generator from Home Depot. I am very pleased with their service and products.
          by
            1 found this review helpful
            This is my first time with an on demand type water heater. It seems to work good so far. It is w...
            This is my first time with an on demand type water heater. It seems to work good so far. It is well made and compact. Wasn't hard to install using a Watts installation kit. The one big problem I had was with leaks at the inlet nipples? Took me many times to get it to stop leaking! Instructions say not to use Teflon tape or pipe dope, it leaked at both connections. I tried tape, they leaked. I tried pipe dope, they leaked. I tried special pipe dope with gasket product (Block), both connections still leaked! I left the dope on and added 4 layers of yellow Teflon tape (thickest tape) and cranked down again, Finally no seepage, YEAH! Still holding. My solution would to have longer nipples on the water heater? I notice when I took connections apart there was only about 3/8" of threads being used in female coupling that attaches to the heaters male connection, with fittings tightened to the fullest??
            by
            • Verified Purchase
            • Recommended
            4 found this review helpful
            Installed this as a alternative hot water system during the Summer months in combination with pre...
            Installed this as a alternative hot water system during the Summer months in combination with preheated solar water system. Works perfectly as designed. Installed 5/1/2021. Goal was to eliminate the oil burner operation/dependency during the Summer months. It is installed after the preheated solar water. Very easy to install, very easy operation, but I'm a pro. My tip...make sure to install a way to "descale" it if you have hard water/water softener system. When incoming water temps are "hot" unit uses very little electric. On a good day water temp got to 115 deg, with unit set to 110 deg it uses NO electric.
            by
            • Verified Purchase
            • Recommended
            5 found this review helpful
            Great tankless electric water heater and the best customer service!
            I bought this unit three years ago and it worked great until recently it sprung a leak. So I called customer service and they were amazing! Within an hour I had a new unit on its way via FedEx to my home! Two days later the new unit arrived. The warranty on this is the real deal and that’s what’s very important with these type of wireless tanks. I know they do they do not last as long as your standard hot water tank but that’s the trade-off. You get fast unlimited hot water but it won’t last 20 years. But with this warranty and this great customer service this is the perfect product! Very happy with this purchase and dealing with this company.
            by
              • Recommended
              9 found this review helpful
              Leaks at the element tank.
              Careful, mine started leaking and instead of repairing it they say "Oh , you have to disassemble the unit, pull out the elements and soak them in vinegar and replace the o-rings - annually"! And by the way, the manual that comes with it fails to mention that. So go pay a plumber to do all this for you.. They do not stand behind their product.
              by
                30 found this review helpful
                This is my second one in less than two years. Word to the wise: BE SURE TO SEND THE REGISTRATION...
                This is my second one in less than two years. Word to the wise: BE SURE TO SEND THE REGISTRATION CARD IN, otherwise there is NO warranty of any kind. Hoping the second one lasts longer.
                by
                  26 found this review helpful
                  Very happy with product! I had family over for two weeks, and ran two showers with people using b...
                  Very happy with product! I had family over for two weeks, and ran two showers with people using bathroom facets without any change to temperature. Easy to install, and would highly recommend!
                  by
                  • Verified Purchase
                  • Recommended
                  7 found this review helpful
                  Rating provided by a verified purchaser...
                  Rating provided by a verified purchaser
                  by
                  • Verified Purchase
                  4 found this review helpful
                  Showing 1-10 of 1,650 reviews

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                  Required Volt Connection240 volt240 volt240 volt240 volt
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                  Application TypeResidentialResidentialResidentialResidential
                  Indoor/OutdoorIndoorIndoorIndoorIndoor
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