Best Electric Tankless Water Heater
Rheem Tankless Electric Water Heater – Gray (Multiple kW Models)
The Rheem RTEX Series tankless electric water heater is designed to deliver continuous, on-demand hot water with high efficiency and precise temperature control. Its external digital thermostatic LED display offers ±1° accuracy, making it easy to set and maintain your ideal water temperature.
With advanced self-modulation technology, the unit automatically adjusts power usage based on demand—helping save energy while ensuring consistent performance. Depending on the model, flow rates range from 0.9 to 5.9 GPM, allowing options suitable for everything from point-of-use sinks to whole-home applications.
Built with durable copper immersion heating elements that are field-serviceable, the unit is designed for longevity and easy maintenance. Installation is straightforward with bottom ¾-inch NPT connections and threaded components for simple replacement.
Tankless electric models require no venting, giving you the flexibility to install them virtually anywhere inside your home.
| Pros | Cons |
|---|---|
| Precise temperature | Needs high-amp circuit |
| Energy-efficient | Flow varies by model |
| Continuous hot water | May need multiple units in cold climates |
| Easy installation | Upfront electrical work |
| Compact design | Not for large households (small kW models) |
| No venting needed | Copper elements require maintenance |
EcoSmart ECO 11 Electric Tankless Water Heater – 13 kW, 240V
The EcoSmart ECO 11 is a compact, energy-efficient tankless water heater designed for point-of-use or small-space applications. With patented self-modulating technology, it adjusts energy usage based on demand, providing consistent, on-demand hot water while minimizing energy waste.
This model delivers between 1.3 and 3.1 GPM depending on incoming water temperature—ideal for a bathroom, office breakroom, small sink, or similar low-flow setups. It’s 99% thermal energy efficient and only heats water when needed, helping reduce utility costs.
Its ultra-compact size—90% smaller than traditional tanks—allows easy wall mounting, making it perfect for homes with limited space. The digital LED display provides precise temperature control within ±1° of the selected setting.
Lightweight, easy to install, and highly efficient, the ECO 11 is built for smaller households or supplemental hot water needs.
| Pros | Cons |
|---|---|
| Compact size | Not for whole home |
| Energy efficient | Needs 60A breaker |
| On-demand hot water | Flow drops in cold climates |
| Easy install | Plastic housing |
| LED temperature control | Limited GPM |
| Cost-effective | One-use-point focus |