Stiebel Eltron DHX 12-2 Trend
#11 in ElectricFull review
For adding fast hot water to a far sink or a single shower in a warm climate. The long warranty sets it apart from cheaper point of use units.
Amazon $266.14$266.14
The Stiebel Eltron DHX 12-2 Trend is the better tankless water heater overall, rated 3.1 to 2.4. The Stiebel Eltron DHX 12-2 Trend leads on efficiency and warranty. The Stiebel Eltron DHX 12-2 Trend costs $2.85 less ($266.14 vs $268.99).
Rheem RTEX-11
#19 in ElectricFull review
For a single shower or a pair of sinks in a warm climate. The EcoSmart ECO 11 costs less and carries a lifetime warranty.
Amazon $268.99$268.99
Prices were last checked October 31, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Which should you buy?
- Choose the Stiebel Eltron DHX 12-2 Trend for efficiency (0.96 UEF vs 0.92 UEF) and warranty (7-year heat exchanger warranty vs 5-year heat exchanger warranty).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every electric tankless water heater; a clear win is highlighted. How we rank explains each one.
| Factor weight | Stiebel Eltron DHX 12-2 Trend | Rheem RTEX-11 |
|---|---|---|
| Overall rating | 3.1/5 | 2.4/5 |
| Value 35% | 54 $22.18 per kW ($266.14, 12 kW) | 46 $24.45 per kW ($268.99, 11 kW) |
| Heating power 25% | 4 12 kW | 0 11 kW |
| Efficiency 15% | 75 0.96 UEF | 25 0.92 UEF |
| Warranty 25% | 57 7-year heat exchanger warranty | 29 5-year heat exchanger warranty |
Specifications
| Stiebel Eltron DHX 12-2 Trend | Rheem RTEX-11 | |
|---|---|---|
| Heating | ||
| Fuel | Electric | Electric |
| Electric power | 12 kW | 11 kW |
| Max flow | 2.5 GPM | 2.7 GPM |
| UEF | 0.96 | 0.92 |
| Installation | ||
| Voltage | 240 V | 240 V |
| Breakers | 50 A total | 50 A total |
| Weight | 5.5 lb | 6.5 lb |
| Features | ||
| Built-in recirculation | No | No |
| Wi-Fi | No | No |
| Heat exchanger warranty | 7 years | 5 years |
| Parts warranty | 3 years | 1 year |