For a single shower or a pair of sinks in a warm climate. The EcoSmart ECO 11 costs less and carries a lifetime warranty.
Price checked October 31, 2026. As an Amazon Associate we earn from qualifying purchases.
Every Rheem RTEX model we rank, smallest first. Ratings compare each against its own fuel.
| Model | Heating power | Rating | Price |
|---|---|---|---|
| Rheem RTEX-06T | 6.5 kW | 2.4/5 | $189 |
| Rheem RTEX-11 (this one) | 11 kW | 2.4/5 | $268.99 |
| Rheem RTEX-24 | 24 kW | 3.0/5 | $549 |
The rating comes from 4 measured or published factors, each scored 0-100 against fixed reference points for its fuel. How we rank explains each one.
| Model number | RTEX-11 |
|---|---|
| Heating | |
| Fuel | Electric |
| Electric power | 11 kW |
| Max flow | 2.7 GPM |
| UEF | 0.92 |
| Installation | |
| Voltage | 240 V |
| Breakers | 50 A total |
| Weight | 6.5 lb |
| Features | |
| Built-in recirculation | No |
| Wi-Fi | No |
| Heat exchanger warranty | 5 years |
| Parts warranty | 1 year |
For a small home or cabin on a 100 A service in a warm climate where a steady shower temperature matters more than flow. Homes with more service get more for the money from a Trend model.
Amazon $619For instant hot water at a kitchen or bathroom sink far from the main heater.
Amazon $229For instant hot water at a single bathroom or kitchen sink on a budget.
Amazon $189Compare the Rheem RTEX-11 with any other tankless water heater →
More from Rheem: every Rheem product ranked.
