Best Eco Electric Water Heaters for Efficient Home Use
Discover top eco-friendly electric water heaters designed to deliver reliable on-demand hot water while saving energy. The following selections emphasize self-modulating technology, compact designs, and high efficiency—ideal for homes across the United States. Each product is evaluated on energy savings, installation versatility, and temperature control accuracy to help you choose a model that fits your needs.
Summary Table of Chosen Products
| Product | Brand | Type | Key Benefit |
|---|---|---|---|
| EcoSmart ECO 11 | EcoSmart | Electrical Tankless | Self-modulating, compact |
| EcoSmart ECO 27 | EcoSmart | Electrical Tankless | High flow, 3 gpm at low temps |
| EcoSmart ECO 18 | EcoSmart | Electrical Tankless | High-efficiency self-modulating |
| EcoSmart ECO 24 | EcoSmart | Electrical Tankless | Compact design, solid energy use |
| EcoSmart ECO 36 | EcoSmart | Electrical Tankless | Higher capacity, compact footprint |
EcoSmart ECO 11 Electric Tankless Water Heater
The EcoSmart ECO 11 uses patented self-modulating technology to deliver endless on-demand hot water with precise temperature control. It operates at 13 kW on a 240-volt circuit and draws about 54 A, focusing energy only when hot water is requested. Its compact size—roughly 11.5 x 8 x 3.75 inches—allows versatile installation, including wall mounting or placement near point of use. The unit is designed for efficiency, cooling energy use by heating water only as needed, which supports significant energy savings in homes with varied hot water demands.
EcoSmart ECO 27 Tankless Water Heater, 27-kW
Designed for climates where incoming water can be as cold as 37 degrees, the ECO 27 supports higher flow rates, capable of heating nearly 3 gallons per minute. Its digital temperature control enables precise adjustments in 1-degree increments, allowing homeowners to set and maintain comfortable hot water levels. This model is ideal for larger households or homes with higher simultaneous hot water needs, offering robust performance while maintaining energy efficiency through EcoSmart’s self-modulating approach.
EcoSmart ECO 18 Electric Tankless Water Heater
The ECO 18 operates at 18 kW with 240 volts and features EcoSmart’s self-modulating technology to deliver consistent hot water with energy efficiency. It is designed for climates where incoming water temperature is at least 62 degrees Fahrenheit and can heat over 2.5 gallons per minute. The digital temperature control allows temperature settings in 1-degree increments, enabling precise comfort levels without overspending energy. A compact footprint makes installation feasible in tight spaces or near point-of-use locations.
EcoSmart ECO 24 24 KW Tankless Water Heater
The ECO 24 model combines a sleek, compact design with a digital output temperature display. As a high-efficiency unit, it is rated at 24 kW on a 240-volt supply and is designed to be highly efficient, with some models marketed as 99.8 percent energy efficient. Manufactured in the United States, this heater targets homes seeking strong performance in a mid-range capacity, suitable for multi-point use or moderate household hot water demand without a bulky footprint.
EcoSmart ECO 36 36kW 240V Electric Tankless Water Heater
The ECO 36 delivers higher capacity in a compact form with a digital output temperature display. Marketed as 99.8-percent energy efficient, this model is well-suited for households with higher simultaneous hot water demands while still aiming to minimize energy waste. Its American manufacturing footprint emphasizes quality construction and reliability, helping to reduce standby losses and maximize efficiency when water is drawn at multiple fixtures simultaneously.
EcoSmart ECO 8 Tankless Water Heater
The ECO 8 is a compact, low-capacity unit designed for small homes or point-of-use applications. It emphasizes durability and easy usability, with a straightforward installation and a focus on reliability for smaller hot water loads. While not intended for large households, its compact form and simple operation make it a practical option for specific use cases where space is at a premium and demand is modest.
Wintemp 27kW Tankless Water Heater
The Wintemp WM27V Plus model provides 27 kW at 240V with a max current of 113A. It requires a robust installation with three 40-amp double-pole breakers and AWG wiring, plus 3/4″ NPT water connections. It features advanced flow control to maintain temperature as demand changes, delivering up to 6.5 gallons per minute of stable hot water. It is designed for 2–4 points of use in the home and includes a true zero-energy standby option when hot water isn’t needed, reducing energy waste while keeping hot water ready when required.
Buying Guide
Key purchase considerations when selecting an eco electric water heater include capacity and climate compatibility, installation requirements, and control capabilities.
- Flow rate and climate: Choose models with adequate gallons-per-minute (gpm) capacity for your peak demand, and consider incoming water temperature in your region, as colder climates reduce efficiency.
- Self-modulating technology: Look for units that adjust energy use based on real-time flow and temperature to minimize standby energy loss.
- Electrical requirements: Verify circuit requirements, breaker sizes, and wiring to ensure safe, code-compliant installation in your home.
- Size and installation: Smaller footprints enable flexible installation near points of use, reducing piping length and heat loss.
- Temperature control: Digital or precise 1-degree increments help maintain comfort while avoiding excessive energy use.
- Durability and manufacture: Consider models manufactured domestically or with parts readily available for long-term maintenance and support.
- Multi-point efficiency: For homes with several hot water outlets, higher-kW models or multiple units may be necessary to sustain consistent temperature across fixtures.
Overall, EcoSmart models emphasize self-modulating efficiency, compact design, and reliable temperature control. When selecting among ECO 11, ECO 18, ECO 24, ECO 27, and ECO 36, weigh your household hot water demand, climate, and installation constraints to balance performance with energy savings.