10 Best Electric Water Heaters 2025 in the United States

The Rheem 18kW Tankless Electric Water Heater is a solid choice for those looking for an efficient and space-saving solution to hot water needs. Its compact size (14.5"W x 18.25"H) makes it ideal for homes with limited space, and the wall-mount design allows for easy installation. With a maximum flow rate of 4.4 gallons per minute, it can adequately serve smaller households or apartments, meeting the demands for showers and other hot water needs simultaneously.

The Rheem 11kW 240V Tankless Electric Water Heater is a compact and efficient choice for those looking to save space and energy. It offers on-demand hot water with a maximum flow rate of about 2.68 gallons per minute, which makes it suitable for one or two smaller water outlets at once, like a single sink or shower. With a high energy efficiency of 99.8%, it helps reduce electricity usage compared to traditional tank water heaters.

The Rheem 8kW 240V Tankless Electric Water Heater is a compact and energy-efficient option for providing on-demand hot water in smaller households or for limited use points like a single bathroom or kitchen sink. Its tankless design means it heats water continuously, so you don’t have to wait for a tank to refill, which helps save space and potentially reduces energy waste compared to traditional tank heaters. The unit has an 8kW power rating and can deliver a flow rate of up to 1.95 gallons per minute, making it suitable for low-to-moderate hot water needs but likely not enough for whole-house use or multiple simultaneous showers.