Ecosmart ECO 27 Electric Tankless Water Heater Review

Quick Overview of the ECO 27 Tankless Water Heater


This heater is a quality option for most households, including those in Northern climates. It is more inexpensive than most whole-home heaters and is capable of producing up to 5.3 GPM in favorable conditions. This heater is not for VERY large households (possibility of 4+ fixtures running at time), but other than that I would recommend this option.

Amazon Customer Rating: 4.5


  • Lifetime Warranty
  • Unlimited Hot Water
  • Off the Shelf Replaceable Elements
  • Low Price Point
  • Made in USA


  • Will most likely need additional electrical work
  • Professional installation needed for lifetime warranty

In-Depth Review

By William Fisher on February 18

The ECO 27 is another addition to the ECO line of tankless water heaters from EcoSmart, and it shares the winning formula of the brand. It contains the Self Modulating technology EcoSmart has recently patented to keep your energy consumption low and your water at the proper temperature. It is the largest heater with this technology offered by EcoSmart, and it is marketed as a “whole-house” heater. It contains a digital temperature control that allows you to set the temperature in increments of one degree.

91FxgKQnebL._SL1500_The ECO 27 is configured for climates where the incoming water temperature can reach as low as 37 degrees. According to the EcoSmart website, this means you can safely use this heater all over the United States and even in some areas of Canada. Even at the coldest ground water  temperature, the ECO 27 is capable of heating almost 3 gallons per minute of water. That would be sufficient to run two showers that emit no more than 1.5 GPM each simultaneously in the Northern U.S. In warmer climates where the incoming water temperature is higher, the ECO 27 puts out 5.3 gallons per minute, plenty for two showers and another fixture running at around 2 gallons per minute, such as a running faucet. Remember, that means it can run these fixtures at the same time.

Because it heats the water using an electric heating element, it is incredibly energy efficient and much easier to maintain than a gas heater. Additionally, this heater is much more affordable than a comparable gas heater, about half the cost of your conventional gas powered tankless water heater.

How It Performs

This tankless water heater is my favorite model that I’ve used so far. Installation was not overly difficult, but you’ll definitely want to know what you are doing if you attempt it yourself, otherwise it would be wise to have it installed professionally. Also, remember that in order to qualify for the lifetime warranty you must have it professionally installed.

The Eco 27 can produce a good amount of really hot water at low flow rates, but because of electrical limitations it struggles at times to produce super-hot water at high flow rates. I would recommended installing low-flow shower heads if you like really hot showers, but for one shower at a time it should run great, no problem. With low-flow shower heads it will easily accommodate 2 showers at time. It does take a week or so to get used to properly setting the temperature in the shower, depending on how many fixtures are running you may have to adjust the temperature. But this is easy to figure out and should only take a few days to get right.

One thing I appreciated about this model is how well-made it is. If the heating elements in your heater do happen to fail, they are simple to replace. Plus, with the lifetime warranty this may be the last heater you ever have to buy. That’s a pretty good deal if you ask me. Overall I would give this heater a 4.5 out of 5, it gives you all the benefits of a tankless water heater at a great price.


This heater has earned its high praise and consistent good ratings. The combination of the affordable price, lifetime warranty, easily replaceable parts, and ability to heat hot water for the whole house really sets it apart from the competition. If you are in the market for a new heater, I would highly recommended researching this option.

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