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: © Amazon)

Top Ten Reviews Verdict

The EcoSmart ECO 27 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.


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    Energy efficient

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    Compact in design

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    Lifetime warranty


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    Might struggle with heavy hot water use

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The EcoSmart ECO 27 is an electric tankless water heater that's ideally suited to apartments or homes. Providing 27kW of output, this tankless water heater is designed for one or two bedroom homes, with no more than two bathrooms. 

An energy-efficient water heater, the ECO 27 offers accurate temperature control and is self-modulating. It is compact too, but attractive enough not to offend if it can't be hidden away. 

To find out how it fared in our round up or to see other models we've reviewed, head to our full guide to the best tankless water heaters

EcoSmart ECO 27: 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: 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. 

EcoSmart ECO 27: Features 

The EcoSmart ECO 27 is a great space saving option compared to a water heater that requires a huge tank and takes up loads of room. Tankless water heaters obviously don't have a tank to keep hot water in, and instead, models including the EcoSmart ECO 27, heat water as it passes through the machine. 

What's more, the EcoSmart ECO 27 is only on when you need hot water, it doesn't waste energy by keeping water hot when you're not using it. 

The components in this electric tankless water heater are made with copper and stainless steel to ensure they last as long as possible. 

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.  

John Carlsen

John has been researching and reviewing home security and smart home products for Top Ten Reviews since 2013. As well as covering smart home and home security and safety, he also covers other home technology products such as HVAC, garage door openers and more. He enjoys DIY, writing and hiking in his spare time.