








🔥 Endless hot water, zero wasted energy — upgrade your flow game!
The Rheem 18kW 240V Tankless Electric Water Heater delivers continuous hot water on demand with a sleek, compact design that saves space and energy. Featuring precise digital temperature control, advanced self-modulating technology, and durable copper heating elements, it supports up to 4.4 gallons per minute flow rate. Ideal for single shower or mid-range whole-home use, this unit reduces energy consumption by up to 50% compared to traditional tanks, making it a smart, modern upgrade for efficient, reliable hot water.











| ASIN | B01MR7Z39V |
| ASIN | B01MR7Z39V |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #56,282 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #85 in Water Heaters |
| Color | Gray |
| Customer Reviews | 4.2 4.2 out of 5 stars (1,985) |
| Customer reviews | 4.2 4.2 out of 5 stars (1,985) |
| Date First Available | 2 March 2017 |
| Date First Available | 2 March 2017 |
| Finish | Stainless Steel |
| Flow Rate | 4.4 Gallons Per Minute |
| Included components | Fittings, Aerators |
| Installation Method | Wall Mount |
| Is Discontinued By Manufacturer | No |
| Item Package Quantity | 1 |
| Item Weight | 6.7 Kilograms |
| Item model number | RTEX-18 |
| Item model number | RTEX-18 |
| Manufacturer | Rheem |
| Manufacturer | Rheem |
| Material | Stainless Steel |
| Maximum Pressure | 150 |
| Part number | RTEX-18 |
| Pattern | Minimalist, Modern |
| Plug Profile | Wall |
| Power source type | AC Power |
| Product Dimensions | 46.99 x 36.83 x 8.89 cm; 6.7 kg |
| Product Dimensions | 46.99 x 36.83 x 8.89 cm; 6.7 kg |
| Shape | Rectangle |
| Size | Small |
| Special Features | LED Display |
| Specific uses | Inside; Professional |
| Style | Heater |
| Voltage | 240 Volts |
| Water Consumption | 7 Gallons |
| Wattage | 18000 watts |
B**K
Great product, have been using ours for 2 years and it works great.
J**V
Bastante cumplidor aun para lo que yo esperaba ya que solo requiero una cantidad relativamente baja de agua caliente y da bastante mas de lo esperado, totalmente recomendable
A**R
The unit was easy to install and I use the existing hot water tank as a preheat tank. We are on a well and the water is very cold coming up out of the ground, so I set the tank at minimum and it heats the well water to roughly ambient temperature. My gas bill has dropped by 70% and my electric bill has only risen about 3%. This is the only way to go!
A**O
Es buen producto, solo la instalción se complica por el cableado electrico que debe ser calibre 8 y que los interruptores deben ser dobles por el tema de 220V. Por lo demas puedo comentar que el agua se calienta rapido, se mantiene a buena temperatura (ajustable),
E**E
Excelente equipo
Trustpilot
3 days ago
1 month ago