7 Best Ecosmart Tankless Electric Hot Water Heaters 2026 in the United States

The EcoSmart ECO 27 Tankless Electric Water Heater offers several valuable benefits for users looking for an efficient and space-saving solution for their hot water needs. One of its standout features is its ability to provide endless on-demand hot water, ensuring you never run out. The water temperature is consistently monitored and controlled, maintaining performance within 1 degree of the selected temperature, which is great for comfort and reliability. Additionally, the unit boasts a high energy efficiency rating of 99%, potentially cutting water heating costs by up to 50%.

Its compact size (17 x 17 x 3.5 inches) means it can be easily installed on a wall or at the point of use, saving up to 12 cubic feet of storage space compared to traditional tank heaters. The digital temperature control allows for precise adjustments in 1-degree increments, giving users complete control over their hot water settings. However, it requires a significant electrical setup, including three 40 Amp Double Pole Breakers and a recommended 200 Amp electrical panel, which might be a challenge for some homes.

The maximum flow rate varies between 2.7 to 6.5 gallons per minute depending on the inlet water temperature, so it may not be suitable for larger homes with high hot water demand. The unit is backed by a limited lifetime warranty on electronics, exchanger, and element, though the warranty does not cover labor or incidental damages and proper registration is required. The EcoSmart ECO 27 is ideal for users who need a reliable, energy-efficient hot water solution and have the necessary electrical infrastructure to support it.

The EcoSmart ECO 11 Electric Tankless Water Heater is a compact and energy-efficient option ideal for smaller applications like a bathroom, small sink, or office breakroom. It offers an impressive flow rate of up to 3.1 gallons-per-minute (GPM), ensuring you get hot water on demand without running out. The unit's self-modulating technology helps maintain a consistent water temperature and improves energy efficiency, with the heater only using energy when hot water is required.

This translates to an impressive 99% thermal energy efficiency, which could save you money on your energy bills in the long run. Additionally, its small size allows easy installation on a wall or at the point of use, saving valuable space in your home. However, it's essential to note that the heater is best suited for low-flow applications, so it might not be the best choice for larger households with higher hot water demands.

The unit draws 54 amps, and you will need to ensure your electrical system can handle this requirement. It comes with a lifetime warranty on electronics, the exchanger, and the element, though labor costs are not covered. Its compact size and efficiency make it an appealing choice, though the initial setup might involve additional costs if your home isn't already configured to support its power needs. If you're looking for a reliable and energy-efficient water heater for a smaller setting, the EcoSmart ECO 11 is worth considering.

The EcoSmart ECO 18 is a compact and energy-efficient electric tankless water heater that delivers up to 3.5 gallons per minute, making it suitable for small households or single-point use such as a bathroom sink or a small kitchen. It has an 18 kW power rating and operates on 240 volts, providing enough heat for a moderate temperature rise, which is ideal in areas with milder winters where water doesn’t need to be heated drastically. The unit features digital temperature control and an LED display, allowing easy and precise adjustment of water temperature to enhance user convenience.

One of its key advantages is its high energy efficiency of 99.8%, meaning it uses electricity very effectively and can potentially lower energy bills compared to traditional tank heaters. Its compact size (17 x 14 x 3.5 inches) allows it to fit well in tight spaces and supports flexible installation options. Additionally, the heater comes with a lifetime warranty on electronics, the heat exchanger, and the element, demonstrating confidence in its durability, although labor costs for installation or repairs are not covered.

The EcoSmart ECO 18’s flow rate may limit its ability to supply hot water to multiple outlets simultaneously, making it less suitable for larger families or whole-house use. Installation might require professional electrical work if your home’s wiring does not already support a 240-volt power supply. This unit represents a reliable and efficient choice for those needing limited hot water capacity, especially in warmer climates or smaller homes.