Best Electric Tankless Water Heaters of 2025

The EcoSmart ECO 11 Electric Tankless Water Heater provides endless on-demand hot water, saves space, and saves energy. Its compact size allows it to be installed on the wall or at the point of use, and it is 90% smaller than traditional tank heaters. The tankless electric water heater is 99% thermal energy efficient, and only heats water when called, unlike tank heaters that maintain water temperature. It is ideal for low-flow applications like a bathroom or small sink, providing between 1.3 and 3.1 gallons-per-minute depending on the inlet water temperature.

The Rheem Tankless Water Heater is a durable and efficient option for your hot water needs. With an external digital thermostatic control and LED display, you can easily adjust the temperature with +/-1 degree accuracy. The most advanced self-modulation feature adjusts the power to meet your hot water demand, ensuring that you always have hot water when you need it. The two copper immersion heating elements are field serviceable and provide a flow rate of up to 4.4 GPM. Installation is easy with the bottom 3/4 inch NPT water connections, and the threaded design allows for simple replacement. With the digital temperature display, you can easily monitor the temperature of your water.

The Rheem RTEX-24 Electric Tankless Water Heater offers on-demand, consistent, and continuous hot water whenever you need it. Its self-modulating power control adjusts energy usage based on hot water needs, making it more energy-efficient than traditional tank water heaters. With an adjustable digital temperature display and an ON/OFF dial control, you can easily set your desired temperature. The 24kW model has a flow rate of up to 5.9 GPM, which is perfect for most households. Additionally, the bottom 3/4" NPT water connections make installation a breeze.

The Rheem 11kW Tankless Electric Water Heater offers an ON/OFF Dial Control with adjustable digital temperature display, Self-modulating power control, and 11kW Model Flow Rate: up to 2.68 GPM. The side 1/2" NPT water connections provide convenience for installation. This water heater provides on demand, consistent and continuous hot water, allowing you to enjoy hot water whenever you need it. The heater is also compact and easy to install in any home.

The Stiebel Eltron Tempra 20 offers a reliable solution for on-demand hot water. You can enjoy uninterrupted hot showers whenever you need them, ensuring comfort for your entire household. Its compact design not only saves space but also enhances energy efficiency, as it only activates when needed. The unit operates silently, so you won’t be disturbed while enjoying your hot water. Plus, with a digital temperature display, you can easily monitor the water temperature to your preference, making it a user-friendly choice for any home.

The Orbek Tankless Water Heater offers a reliable solution for your hot water needs. With professional installation recommended, it connects easily to your home's electrical system. You'll enjoy endless hot water on demand, eliminating the standby energy consumption typical of traditional tank heaters. The unit is ETL certified, ensuring it meets rigorous safety standards for your peace of mind. It also features smart operation, adjusting energy use based on water temperature and flow, which helps maintain consistent temperatures while conserving power. This means you can enjoy hot water without worrying about energy waste.

The EcoSmart Tankless Water Heater is highly durable and easy to use. It can save up to 60% on your water heating costs with the most advanced, self-modulating technology available. With an activation flow of 0.3 GPM and a flow rate of 3.51 gallons per minute, you will never run out of hot water. The product is compatible with 2 X 40 AMP (DP) breakers and 2 X 8 AWG wire. Moreover, it comes with a lifetime warranty for residential use. You can save up to 12 cubic feet of storage space as it is a tankless water heater. The digital temperature control in 1-degree increments gives you complete control of hot water, making it an ideal choice for those who want to save money on their water heating bill while enjoying a constant supply of hot water.

The Ranein Tankless Water Heater offers a powerful solution for your hot water needs. With its 14 kW output, it provides instant hot water without the wait, making it perfect for busy households. You can save on energy costs since it only heats water on demand, avoiding the energy waste associated with traditional tanks. The simple knob controls and LED display allow you to easily set your desired temperature, ensuring a comfortable shower every time. Plus, safety features like leakage protection and automatic shutdown give you peace of mind during use.

The Ranein Tankless Water Heater offers a powerful and efficient solution for your hot water needs. With its 18 kW capacity, this unit heats water on demand, eliminating the need for preheating and significantly reducing energy costs by up to 60%. Its impressive thermal efficiency of 99% ensures you get ample hot water with a flow rate of up to 4.3 gallons per minute, perfect for multiple outlets in your home. You can easily set your desired temperature between 86°F and 131°F using simple knob controls and an LED display, providing you with convenience and peace of mind.

The Airthereal Tankless Water Heater offers an endless supply of hot water, ensuring you won’t have to deal with cold showers ever again. Its compact design saves valuable space, making it ideal for smaller areas. Thanks to its self-modulating technology, it only heats water when needed, helping you significantly reduce energy costs. Safety features like high-temperature protection and electrical leakage prevention give you peace of mind while enjoying on-demand hot water. This unit is perfect for families, providing comfort and convenience at every shower time.