10 Best Tankless Water Heaters 2025 in the United States

The Rheem RTGH-95DVLN-3 is a solid choice for those in need of a tankless water heater, especially for residential use. With a flow rate of up to 9.5 gallons per minute, it can easily meet the hot water demands of larger households or simultaneous usage across multiple fixtures. Its energy efficiency rating of 0.93 ensures that it operates economically, which can translate to lower energy bills over time.

The Stiebel Eltron Tempra 24 Plus is a solid choice for those in need of an electric tankless water heater suitable for whole-house applications. Its continuous flow technology ensures that you'll have an uninterrupted supply of hot water, which is a significant advantage for larger households or those with high hot water demands. The unit is compact and energy-efficient, featuring a design that doesn't require venting, which makes it a great option if space is limited. The energy savings monitor is a nice addition, allowing you to track your energy costs effectively.

The EcoSmart ECO 11 is a compact electric tankless water heater designed primarily for small-scale or point-of-use applications like a bathroom sink or office breakroom. It delivers a flow rate between 1.3 and 3.1 gallons per minute, which means it can provide steady hot water for low-flow needs but might struggle with larger demands such as multiple full bathrooms running simultaneously. The patented self-modulating technology keeps water temperature consistent within 1 degree, which is great for comfort and energy savings. Speaking of energy, this unit is quite efficient, converting 99% of electricity into heat and only heating water when you need it, helping reduce your utility bills compared to traditional tank heaters. Installation is flexible because of its small size—about 11.5 by 8 by 3.75 inches—and wall-mount design, saving space and making it ideal for tight areas. It operates at 240 volts and requires a 54-amp electrical draw, so your home's electrical system must support this.