Best Electric Tankless Water Heater: Top Picks for 2025
Electric tankless water heaters have revolutionized home water heating by providing endless hot water on demand while saving energy and space. Unlike traditional tank water heaters, which constantly heat and store water, tankless models heat water only when needed, reducing energy consumption and utility bills. With advancements in technology, modern electric tankless water heaters offer improved efficiency, durability, and performance, making them a popular choice for homeowners.
Choosing the best electric tankless water heater depends on several factors, including flow rate, energy efficiency, installation requirements, and budget. Whether you need a compact unit for a small household or a high-capacity model for a large family, there are numerous options available.
Additionally, we will compare leading models in terms of performance, price, and user satisfaction to help you make an informed decision. By the end of this article, you will have a clear understanding of the best electric tankless water heaters on the market and how they can enhance your home's comfort and efficiency.
Electric tankless water heaters are an excellent investment for homeowners seeking energy efficiency, space savings, and continuous hot water supply. These devices heat water directly as it flows through the unit, eliminating the need for a storage tank and reducing standby energy losses. The best electric tankless water heaters combine high performance, reliability, and advanced features to meet varying household demands.
When selecting an electric tankless water heater, consider the flow rate, measured in gallons per minute (GPM), which determines how much hot water the unit can deliver at once. Another critical factor is the temperature rise, or how much the heater can increase the water temperature based on the incoming cold water temperature. Energy efficiency, measured by the Uniform Energy Factor (UEF), indicates how effectively the unit converts electricity into heat. Additionally, installation requirements, such as electrical capacity and plumbing modifications, should be evaluated before purchase.
Top Electric Tankless Water Heaters of 2025
The following are some of the best electric tankless water heaters available in 2025, based on performance, customer reviews, and expert recommendations.
1. Stiebel Eltron Tempra 36 Plus
The Stiebel Eltron Tempra 36 Plus is a high-performance unit known for its advanced flow control technology, which adjusts the water flow to maintain a consistent temperature. With a flow rate of 3.6 GPM, it is suitable for small to medium-sized households. The unit features a compact design, digital temperature control, and a self-modulating energy system for optimal efficiency.
2. EcoSmart ECO 27
The EcoSmart ECO 27 is a popular choice for its affordability and efficiency. It offers a flow rate of 6.6 GPM, making it ideal for larger households. The unit uses self-modulating technology to adjust power consumption based on demand, reducing energy waste. Its compact size and simple installation make it a practical option for many homes.
3. Rheem RTEX-18
The Rheem RTEX-18 is a reliable and easy-to-install electric tankless water heater. With a flow rate of 4.4 GPM, it is suitable for small to medium-sized homes. The unit features digital temperature control, a durable copper heating element, and a compact design. It is also backed by a 5-year warranty, ensuring long-term reliability.
Comparison Table
| Model | Flow Rate (GPM) | Temperature Rise (°F) | UEF | Price (USD) |
|---|---|---|---|---|
| Stiebel Eltron Tempra 36 Plus | 3.6 | 77 | 0.99 | 1,200 |
| EcoSmart ECO 27 | 6.6 | 45 | 0.99 | 600 |
| Rheem RTEX-18 | 4.4 | 65 | 0.99 | 500 |
Installation and Maintenance Tips
Proper installation and maintenance are crucial for the optimal performance and longevity of your electric tankless water heater. Ensure that the unit is installed by a licensed professional to meet electrical and plumbing codes. Regular maintenance, such as descaling the heating elements and checking for leaks, can prevent performance issues and extend the unit's lifespan.
For more information, visit the official websites of Stiebel Eltron , EcoSmart , and Rheem.
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