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EcoSmart ECO 27 Review

The EcoSmart ECO 27 is an energy-efficient tankless water heater ideal for any family home.

EcoSmart ECO 27 review
(Image: © EcoSmart)

Our Verdict

The EcoSmart ECO 27 review should easily meet all the hot water needs of the typical household, and is energy efficient too. A compact design and lifetime warranty only adds to its all round appeal.


  • Energy efficient
  • Compact in design
  • Lifetime warranty


  • Might struggle with heavy hot water use

The EcoSmart ECO 27 is one of the best tankless water heaters if your use of hot water as a household is closer to average than heavy. An energy-efficient water heater that's suitable for a single-family home, the ECO 27 offers accurate temperature control and is self-modulating. It is compact too, but attractive enough not to offend if it cannot be hidden away. 

EcoSmart ECO 27 Review: What you need to know

The ECO 27 tankless water heater is a compact model, measuring 18 x 17 x 3.75 inches and weighing 13.75 pounds. It will therefore fit in tight spaces, but is still not as small as the Chronomite SR-20L/240, if room really is at a premium. What this water heater also has is a sleek, contemporary design and a low-maintenance copper and stainless steel construction for longevity and simple replacement. 

The ECO 27 requires a 240-volt electrical system and has thermal auto protection to prevent overheating and overloading. This model also has three 9-kilowatt elements and an amperage draw of 112.5. For correct installation and operation, you need 0.75-inch NPT pipe fittings. EcoSmart also includes a lifetime warranty on the water heater’s electronics, exchanger and elements, which is outstanding. However, to qualify for warranty coverage you'll need to employ a professional to install it - also note that only the cost of the heater is covered, and not any labor. 

EcoSmart ECO 27 Review: Energy efficiency

The ECO 27 comes with a digital control panel that allows you to adjust the temperature of the water output in 1-degree increments, giving you precise control. With a maximum flow rate of 6.5 gpm, it is also capable of running up to four showers and a sink at the same time. However, the flow rate and energy efficiency the ECO 27 achieves will depend on the climate in which you live and the temperature at which water enters the heater. The warmer the water at the inlet, the more energy-efficient the model and the higher the flow rate, as it can reach the desired temperature faster. While it doesn't have an Energy Star certification, the ECO 27 promises 99.8 percent energy efficiency. 

The ECO 27 is also self-modulating, which means that this electric tankless water heater adjusts the amount of energy it draws based on how much water you're using and the temperature at which it is set. This feature ensures the temperature of the water meets your needs without wasting excessive energy. 

Should you buy the EcoSmart ECO 27?

If you're in need of a whole-house electric tankless water heater, the EcoSmart ECO 27 is energy-efficient and has an intuitive digital interface that provides precise temperature control. It can cater to a single-family home and comes in a small package that makes it suitable for the those with less space at their disposal. The warranty is exceptional too, as long as you remember to get a professional to put the water heater in for you.