EcoSmart ECO 11 Water Heater
EcoSmart

EcoSmart ECO 11 Water Heater

The EcoSmart ECO 11 Electric Tankless Water Heater is a good choice for small households looking for an energy-efficient, compact water heating solution. While it offers appealing features such as self-modulating technology and a lifetime residential warranty, potential buyers should consider the need for professional installation and its suitability for limited hot water demand.

Model: ECO 11Color: WhiteUPC: 854920002022
Lowest at Amazon
$139.01 at Amazon
Lowest at any Popular Retailer
$139.01 at Amazon

Where to Buy

Prices last updated: August 28th 2026 12:58 am

Pros

  • Small size and lightweight design make it easy to install in tight spaces.
  • Energfficient due to patented self-modulating technology, reducing electricity bills.
  • Capable of providing hot water for one shower in cold climates or two in warmer regions.
  • Weluited for small households, supporting multiple fixtures with better pressure.
  • Consistently heats water quickly and maintains temperature with manual adjustments.
  • Provides continuous hot water without the risk of running out like traditional tanks.
  • Backed by a limited lifetime warranty, offering reassurance for residential use.
  • Simple electrical requirements allow for straightforward installation if you’re familiar with wiring.
  • Looks sleek and unobtrusive, fitting into various locations easily.
  • Good value for the price compared to larger or traditional water heating options.

Cons

  • Installation typically requires a professional electrician and plumber, increasing upfront costs.
  • Demands a dedicated 6mp double-pole breaker and #6 AWG wiring; not suitable for standard wiring setups.
  • Can produce a humming noise and electrical interference, especially affecting nearby induction appliances.
  • Limited flow rate at higher temperature rises; may struggle with simultaneous multiple hot water demands.
  • Some users reported temperature fluctuations during usage, especially with fluctuating water pressure.
  • Might not be suitable for larger households or multiple bathrooms due to flow limitations.
  • Requires careful attention to proper connection installation; leaks can occur if washers and fittings are overlooked.
  • Installation cost can be significant, averaging around $50$700.
  • Water temperature can drop if other fixtures are used simultaneously, requiring manual adjustments.
  • May experience issues with scale buildup over time, though installing a filter can help mitigate this.

Bottom Line

The EcoSmart ECO 11 is a solid choice for small households or individual use, especially if space and energy savings matter. It offers reliable, on-demand hot water with an easy-to-spot size, making it a convenient upgrade from traditional tank heaters. However, it’s best to be prepared for professional installation and to ensure your electrical system can support its requirements. If you need a solution for larger households or multiple bathrooms, you might want to explore higher-capacity models or those with a greater flow rate.

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What Reviewers Are Saying

Praised
easy installation23%
great performance11%
heats water on demand6%
compact size6%
Criticized
limited hot water14%
requires professional installation11%
maintenance required9%
warranty issues9%
leaks during installation6%
noisy operation6%

Customer Ratings

5,391 reviews averaging 4.3 out of 5 stars from Amazon
4.3
5,391 reviews
5
70%
4
13%
3
6%
2
3%
1
9%

Based on 5,391 reviews from Amazon

Common Questions

If you're thinking about setting up the EcoSmart ECO 11 Electric Tankless Water Heater, getting the electrical setup right is super important. This model uses smart technology to heat water only when ...

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Discussion

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