Model#: ECONECO18

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Brand new items;Full manufacturer warranty available
Manufacturer inspected, repaired and tested items; CPO 120 day money back guarantee
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New items with possible minor cosmetic damage; CPO 120 day money back guarantee
Returned items inspected, repaired and tested by CPO technicians; CPO 60 day money back guarantee

EcoSmart ECO18 240V 18 kW Electric Tankless Water Heater

  • EcoSmart ECO18 240V 18 kW Electric Tankless Water Heater
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With any EcoSmart product, rest assured knowing you are getting a top of the line, eco-friendly water heater that will not only provide continuous convenience, but also help save both money and energy for years to come. With so many advances in heating technology in the recent years, EcoSmart has become the leader in water heating technology.
The EcoSmart ECO18 Series tankless water heater is configured for climates where incoming water temperature is 62 degrees Fahrenheit and above. Capable of heating 2.5 Gallons per minute, the ECO18 is capable of running two showers simultaneously when incoming water temperature is above 60 degrees Fahrenheit. It also features an easy to read digital temperature control panel that allows you to set the temperature to what you want at any time.
  • Save up to 60% on your water heating cost with an EcoSmart electric tankless water heater
  • Provides continuous hot water for ultimate convenience
  • Patented Self Modulating technology and design
  • Designed with standard and reliable easy to service elements and heat exchangers that provide 99.8% energy efficiency
  • 18 kW 240V Electric Tankless Water Heater - ECO18
  • Owner's Manual
Compliance and Restrictions
warning: --


Length: 14 in.
Width: 17 in.
Height: 3.75 in.
Weight: 9 lbs.
Activation Flow: 0.25 GPM
Amperage: 75
Kilowatts: 18
Required Breaker: (2) 40 Amp DP
Thermal Efficiency: 99%
Voltage: 240V
Water Connection: 3/4 in. NPT
Wire Size: 8 Gauge



4.5 / 5.0
2 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Yes, I would recommend this to a friend (2)
Easy To Use (1)
Value (1)
Lightweight (1)
Best Uses
Frequent Use (1)
Yes, I would recommend this to a friend
Easy To Use
Best Uses
Frequent Use
Very easy to install and use.
I just didn`t have enough amperage to run it safely.
Company support was triple A in my opinion, they bent over backwards trying to help me .
Ecosmart even said they would take the product back.
February 23, 2017
over 2 years ago
Describe Yourself:
Avid Do-it-Yourselfer
Yes, I would recommend this to a friend
Nice instant hot water heater
Easy to install. Use is for bathtub/shower and washing machine. Takes less room than hot water tank but provides all teh hot water we need.
May 4, 2014

Questions & Answers

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Browse 7 questions Browse 7 questions and 5 answers
Do you have propane heaters
DON on Aug 8, 2015
BEST ANSWER: Please see link for the propane heaters that we retail..,default,sc.html
I could not find what the high temp setting was on the ECO 18 is , generally it 120 degree or 140 ?
Mark C on Mar 6, 2018
BEST ANSWER: The Eco18 has a temperature range of 80 degrees Fahrenheit -140 degree Fahrenheit.
what is the high temp setting, 120 0r 140?
Mark C on Mar 6, 2018
BEST ANSWER: 140 is the high temperature setting.
Is this unit good for 2 bath and a kitchen?
Ben on Nov 27, 2015
BEST ANSWER: A 18kw system will not have a high enough flow rate to supply water to both bathrooms and the kitchen at the same time.
How hot can you set temp?
A shopper on Jul 18, 2018
This unit enough for shower and kitchen sink?
A shopper on Mar 3, 2018
What does error code E3 mean?
A shopper on Feb 7, 2018