Ecosmart ECO 24 KW 240-Volt Review

Ecosmart ECO 24 KW 240-Volt Electric Tankless Water Heater is a semi-large range water heater from the Ecosmart group. Like other water heaters of this group, it has a self-modulating technology. So you can save half of your energy cost if you choose this product. The beauty of the Ecosmart group is they make mostly electric tankless water heaters, and all of them are very energy-saving. They have labeled all the products with numbers. So when you have a high need per GPM, you can go for a higher numbered Ecosmart product. For example, at an inlet temperature of 77 degrees, Ecosmart ECO 24 has 5.85 GPM, Eco 27 has 6.59 GPM, Eco 18, on the other hand, has 4.39 GPM. So as per your need, you can choose the tankless unit. Two or three other things will change as you choose more GPM, the are-Maximum power of the amp to support the unit, the unit’s size, and the unit’s price.

Ecosmart ECO 24 24 KW at 240-Volt Electric Tankless Water Heater with...
  • Lifetime warranty
  • Save up to 60-percent on your water heating cost with an ECOSMART electric tankless water...
  • Never run out of hot water with an ECOSMART tankless water heater
  • Patented Self Modulating Technology and design.Activation flow 0.3 GPM

Last update on 2021-06-29 at 08:15 / Affiliate links / Images from Amazon Product Advertising API

Suitable for medium-large home

American homes, though are big in size, rarely have more than 2-3 bathrooms. If you are living in a home with 2 bathrooms, this one is great. Even cold weather of 37-47 degrees F can supply 2.41-2.83 GPM, meaning a 1.5-2 GPM shower and a standard hand sink with 0.5 GPM. At 52 degree F, it can support 2 showerheads or one shower head and a sink, a washing machine by supplying 3.09 GPM. Things will only get better from 52 onward; like in 57 degrees, 3.42 GPM will support two showers and a basin. At 62 degree F, 3.81 GPM meaning two showers head, a basin, and a dishwasher. At 67 degree F two showers, three other water fixture faucet or washing machine. At 72-77 degree F, Ecosmart ECO 24 can simultaneously support three bathroom houses, with 4.97 -5.85 GPM (three showers and 2-3 basin).

This calculation was based upon the trend that the Standard shower has 2 GPM, the water saver shower head has 1.5 GPM, the standard hand sink has 0.5 GPM, and kitchen sinks have 1-2 GPM.

Saves electricity

It saves 50% of your electric cost as per manufacturer claims. Traditional water heaters eat up some electricity even when you are not using it. The self-modulating technology of Ecosmart does not allow such wastage. Ecosmart ECO 24, 24 KW at 240-Volt Electric Tankless Water Heaters senses the flow of water and, based on it, powers the engine to ignite and make the water hot as per the user’s required rate. So no electric consumption while idle let you save the bill and power.

Digital control

It has a beautifully designed digital temperature control system. It let you control the heat. This technology uses a flow control valve and a thermostat to manage the heat even when water flow is varying from time to time. Like other Ecosmart water heaters, it has a digital scale. The digital scale offers 80°F – 140°F heat with a convenient option to increase the heat increment by 1 degree. So throughout the whole bath now, you can set a temperature and need not go through the mixing hassles for varying water flows.

Easy installation

Ecosmart ECO 24 has an automatically resettable thermostat as opposed to a manually resettable thermostat. Also, integration of all components is done so that quick connections are available, making it simpler and easier for the installer.

Lifetime warranty

I like this option of the Ecosmart group a lot, and they offer a lifetime warranty on electronics, exchangers, and elements. Labor or any incidental damages and mailing cost is the user’s, and the warranty includes a strict clause of licensed electrician and plumber to have to do the installation.

Special Features

  • Tankless Electric Buying Guide giving elaborate instruction on the specifications
  • 99.8-% energy efficient
  • A compact size of 17 x 17 x 3.5 inches
  • Light-weighted (13.75 lbs), stylish
  • Energystar certification
  • No venting required

Cons with solution

High Cost of installation

The lifetime warranty asks for a professional plumber and electrician to install, which actually costs more than the heater.


If you have DYI skill, you can look inside the unit and find it is straightforward and you have all online guide to install it but if you are not interested in giving up the warranty. Then, you have to spend on the professional installation.

Fluctuation of electricity

Some minor fluctuation of electricity can occur when it is started; trace is shown in bathroom bulbs.


If you have followed NMA standard and 3 double poles 40 amp breaker theory, then Eco smart technical group says-Such problems are the sign of faulty wiring only.

Fluctuating temperature

Some complaints against it being too hot at the beginning and temperature to vary sometimes have been made.


The automatically re-settable thermostat option of Ecosmart 24 is designed to protect you against such fluctuation. Still, you may need to look into faucet valve stuffiness and internal water carrying water pipe dimensions if it occurs.

Frequently Asked Questions

My home has a 240-volt connection. How many breakers and amp I need to install Ecosmart 24.

With 240 volts, you can choose Ecosmart. It will need Three 40 Amp Double Poles.

Is it American-made?

The company is American, but it is China-made.

What does energy star certification signify?

You can visit the website of energy star certification to know exactly what it signifies. It is a symbol of efficiency in terms of power consumption and delivering boiling water.


Ecosmart ECO 24 is a safe choice for any home, whether in the north or the south. 99.8% energy efficiency makes it very lucrative for energy savers like me. Small size, good design, no venting makes it a convenient and beautiful option. The only drawback is the installation cost, which you can bypass by risking the chance to void the warranty. If you are using professional installation, keep their track records secured as the warranty instructions ask for.

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